14-February-2023
Welcome to the weekly threat detection update report from Stamus Networks. Each week, you will receive this email with a summary of the updates.
Current Stamus Threat Intelligence (STI) release version: 669
This week, in addition to daily ruleset and IOC updates, we provided Stamus Security Platform customers with the following improved defense(s):
Note: a "method" as referenced below, is a discrete detection vector for a given threat.
The following detections were added to your Stamus NDR this past week:
Gigabud is the name of an Android Remote Access Trojan (RAT) Android that can record the victim's screen and steal banking credentials by abusing the Accessibility Service. Gigabud masquerades as banking, shopping, and other applications. Threat actors have been observed using deceptive websites to distribute Gigabud RAT. Pcrisk
Gigabud - cyble |
A Trojan horse or Trojan is a type of malware that is often disguised as legitimate software. Trojans can be employed by cyber-thieves and hackers trying to gain access to users' systems. Users are typically tricked by some form of social engineering into loading and executing Trojans on their systems. Once activated, Trojans can enable cyber-criminals to spy on you, steal your sensitive data, and gain backdoor access to your system. Kaspersky
Sventore - microsoft |
Trojan.MalPack.Obsidium is Malwarebytes’ generic detection name for Trojans that are packed with the Obsidium software protection system. Type and source of infection The Trojan.MalPack.Obsidium detection is based on the way the file is packed, which means the Trojan payload could be anything. Malwarebytes
Obsidium - microsoft | Obsidium - abuse.ch |
ASEC Analysis Team has discovered a new information stealer called ColdStealer. It was found that this malware steals various user information and sends it to Command and Control (C2) server. Cybercriminals distribute ColdStealer using a dropper and downloader malware that downloads ColdStealer from the C2 server. The dropper for this stealer is distributed via fake software cracking tools. Pcrisk
Coldstealer - malpedia | Coldstealer - securelist |
The following detections were updated this past week with changes to kill chain phase(s) or MITRE ATT&CK tactic(s)/technique(s):
VICEROY TIGER is an adversary with a nexus to India that has historically targeted entities throughout multiple sectors. Older activity targeted multiple sectors and countries; however, since 2015 this adversary appears to focus on entities in Pakistan with a particular focus on government and security organizations. This adversary consistently leverages spear phishing emails containing malicious Microsoft Office documents, malware designed to target the Android mobile platform, and phishing activity designed to harvest user credentials. In March 2017, the 360 Chasing Team found a sample of targeted attacks that confirmed the previously unknown sample of APT's attack actions, which the organization can now trace back at least in April 2016. The chasing team named the attack organization APT-C-35. In June 2017, the 360 Threat Intelligence Center discovered the organization’s new attack activity, confirmed and exposed the gang’s targeted attacks against Pakistan, and analyzed in detail. The unique EHDevel malicious code framework used by the organization. Malpedia
Malware of this family uses advertising as its main monetization method. The malware uses different methods to display as many ads as possible to the user, including by installing new adware.
These Trojans can get root privileges in order to hide in the system folder, which makes the Trojans very difficult to remove. Kaspersky
The term info stealer is self-explanatory. This type of malware resides in an infected computer and gathers data in order to send it to the attacker. Typical targets are credentials used in online banking services, social media sites, emails, or FTP accounts.
Info stealers may use many methods of data acquisition. The most common are:
hooking browsers (and sometimes other applications) and stealing credentials that are typed by the user using web injection scripts that are adding extra fields to web forms and submitting information from them to a server owned by the attacker form grabbing (finding specific opened windows and stealing their content) keylogging stealing passwords saved in the system and cookies Modern info stealers are usually parts of botnets. Sometimes the target of attack and related events are configured remotely by the command sent from the Command and Control server (C&C). Malwarebytes
First analyzed in early 2014 [1] [2], the Blackmoon banking Trojan targets a user’s online banking credentials using a type of pharming that involves modifying or replacing the local Hosts file with one that redirects online banking domain lookups to an IP address controlled by the attacker. Blackmoon has been observed targeting primarily customers of South Korean online banking sites and services, and is usually distributed via drive-by download. Proofpoint
Cobalt Strike is a commercial, full-featured, penetration testing tool which bills itself as “adversary simulation software designed to execute targeted attacks and emulate the post-exploitation actions of advanced threat actors”. Cobalt Strike’s interactive post-exploit capabilities cover the full range of ATT&CK tactics, all executed within a single, integrated system.
In addition to its own capabilities, Cobalt Strike leverages the capabilities of other well-known tools such as Metasploit and Mimikatz. MITRE
Crimson is malware used as part of a campaign known as Operation Transparent Tribe that targeted Indian diplomatic and military victims. MITRE
DarkCrystal, also known as dcRAT, is a Remote Access Trojan (RAT). Malware of this type is designed to enable remote access and control over an infected device. RATs can manipulate machines in various ways and can have likewise varied functionalities. DarkCrystal is a dangerous piece of software, which poses a significant threat to device and user safety. DcRat
The term info stealer is self-explanatory. This type of malware resides in an infected computer and gathers data in order to send it to the attacker. Typical targets are credentials used in online banking services, social media sites, emails, or FTP accounts.
Info stealers may use many methods of data acquisition. The most common are:
hooking browsers (and sometimes other applications) and stealing credentials that are typed by the user using web injection scripts that are adding extra fields to web forms and submitting information from them to a server owned by the attacker form grabbing (finding specific opened windows and stealing their content) keylogging stealing passwords saved in the system and cookies Modern info stealers are usually parts of botnets. Sometimes the target of attack and related events are configured remotely by the command sent from the Command and Control server (C&C). Malwarebytes
Gamaredon Group is a threat group that has been active since at least 2013 and has targeted individuals likely involved in the Ukrainian government. The name Gamaredon Group comes from a misspelling of the word "Armageddon", which was detected in the adversary's early campaigns. MITRE
Havoc is a modern and malleable post-exploitation command and control framework, created by @C5pider Github
A Trojan horse or Trojan is a type of malware that is often disguised as legitimate software. Trojans can be employed by cyber-thieves and hackers trying to gain access to users' systems. Users are typically tricked by some form of social engineering into loading and executing Trojans on their systems. Once activated, Trojans can enable cyber-criminals to spy on you, steal your sensitive data, and gain backdoor access to your system. Kaspersky
Raccoon is a stealer and collects "passwords, cookies and autofill from all popular browsers (including FireFox x64), CC data, system information, almost all existing desktop wallets of cryptocurrencies". Malpedia
A group targeting UA state organizations using the GraphSteel and GrimPlant malware. Malpedia
Sliver is an open source, cross-platform adversary emulation/red team platform, it can be used by organizations of all sizes to perform security testing. Sliver's implants support C2 over Mutual TLS (mTLS), WireGuard, HTTP(S), and DNS. Implants are dynamically compiled with unique X.509 certificates signed by a per-instance certificate authority generated when you first run the binary. Github
It leverages compromised websites and performs some of the most creative fingerprinting checks we’ve seen, before delivering its payload (NetSupport RAT). Malwarebytes
Malware in this family obtains administrator rights on an infected device in a hidden way. The malware then shows a fake web page that is designed to fool the user. Using administrator rights, the malware intercepts requests when the user tries to access paid online services and online banks, such as Sberbank, Privat24, and Play Market. Trojan-Banker.AndroidOS.Svpeng intercepts a request and asks the user to enter his or her banking information.
This malware uses special methods to resist removal. For example, the program can:
Prevent the user from opening the settings window (by closing the window as soon as the user opens it). Deceive the user by stating that device settings will be lost (factory reset). Display a message that the user is entering an incorrect password, even though the password is the correct one. Kaspersky
DPRK APT actor tracked by Proofpoint as TA444 Malpedia
This type of Trojan modifies data on the victim computer so that the victim can no longer use the data, or it prevents the computer from running correctly. Once the data has been “taken hostage” (blocked or encrypted), the user will receive a ransom demand.
The ransom demand tells the victim to send the malicious user money; on receipt of this, the cyber criminal will send a program to the victim to restore the data or restore the computer’s performance. Kaspersky
Malicious programs of this family secretly send information to the criminal from the user’s infected Android mobile device. Kaspersky
While parsing Microsoft Excel documents using XLM 4.0 macros, the DomainTools Research team came across a Lithuanian-language document title innocuously named “contacts”. The simple macro in this document dropped a slightly more complex PowerShell script that performed C2 communications with a domain that has been active since December 2020 and appeared on no industry-standard blocklists. The most recent domain serving documents was registered in April 2021 and DomainTools Research believes other domains used as short term distribution may lead to other documents. The macro and domain mentioned, when hunted on, revealed documents targeting Azerbaijan, Cyprus, India, Italy, Lithuania, Ukraine, and the Vatican. The DomainTools Research team colloquially refers to this as “Winter Vivern” due to the path used in C2 communication over the last several months. Domaintools
The following threat detection(s) were improved this past week with new or updated threat methods.
| Name of threat | New coverage | Total coverage | Last updated | ||||
|---|---|---|---|---|---|---|---|
| New Detection methods | Kill chain phases | Protocols involved | Detection methods | Kill chain phases | Protocols involved | ||
| APT-C-35 | 1 | command and control | dns | 176 | command and control, delivery | dns, http, tcp, tls | 2023-02-11 |
| Android Trojan Agent | 1 | command and control | dns | 184 | actions on objectives, command and control, delivery | dns, http, tcp, tls | 2023-02-08 |
| Banker Stealer | 5 | command and control | http, dns | 233 | actions on objectives, command and control, delivery | dns, http, smtp, tcp, tls | 2023-02-08 |
| Blackmoon | 15 | actions on objectives, command and control | http, smtp, tcp | 52 | actions on objectives, command and control, delivery, installation | dns, http, smtp, tcp, tcp-pkt, tls | 2023-02-07 |
| Cobalt Strike | 1 | command and control | dns | 402 | actions on objectives, command and control, delivery, exploitation | dns, http, smb, tcp, tls, udp | 2023-02-11 |
| Crimson | 2 | command and control | tcp-pkt | 38 | actions on objectives, command and control | http, tcp, tcp-pkt | 2023-02-09 |
| DCRAT | 1 | command and control | http | 42 | actions on objectives, command and control | dns, http, tls | 2023-02-07 |
| DarkCloud | 1 | actions on objectives | smtp | 3 | actions on objectives | smtp | 2023-02-07 |
| Gamaredon | 5 | command and control | http, dns | 140 | actions on objectives, command and control, delivery | dns, http, tcp-pkt, tls | 2023-02-07 |
| Gigabud | 17 | command and control | dns, http | 17 | command and control | dns, http | 2023-02-08 |
| Havoc | 1 | command and control | dns | 3 | command and control | dns, http | 2023-02-11 |
| Piom | 2 | command and control | dns, tls | 33 | command and control | dns, http, tls | 2023-02-08 |
| Raccoon Stealer | 3 | command and control | http | 138 | actions on objectives, command and control, delivery | http, tls | 2023-02-07 |
| SaintBear | 1 | command and control | http | 4 | command and control | dns, http | 2023-02-09 |
| Sliver Framework | 1 | exploitation | tcp | 462 | command and control, exploitation | dns, http, tcp, tls | 2023-02-07 |
| SocGholish | 4 | command and control | dns, http | 238 | actions on objectives, command and control, delivery, exploitation, reconnaissance | dns, http, tcp, tcp-pkt, tls | 2023-02-10 |
| Sventore | 1 | command and control | http | 1 | command and control | http | 2023-02-07 |
| Svpeng | 1 | command and control | http | 12 | command and control | dns, http | 2023-02-08 |
| TA444 | 2 | command and control | dns | 134 | command and control | dns, http, tls | 2023-02-10 |
| Trojan-Ransom-Android | 1 | command and control | dns | 23 | actions on objectives, command and control | dns, http, tcp, tls | 2023-02-08 |
| TrojanSpy-Android | 2 | command and control | http, dns | 461 | actions on objectives, command and control, delivery, installation | dns, http, tcp, tls | 2023-02-08 |
| Wintervivern | 2 | command and control | http | 16 | actions on objectives, command and control | dns, http | 2023-02-07 |
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Stamus Networks believes in a world where defenders are heroes, and a future where those they protect remain safe. As organizations face threats from well-funded adversaries, we relentlessly pursue solutions that make the defender’s job easier and more impactful. The global leader in Suricata-based network security solutions, Stamus Networks helps enterprise security teams know more, respond sooner and mitigate their risk with insights gathered from cloud and on-premise network activity. Our Stamus Security Platform combines the best of intrusion detection (IDS), network security monitoring (NSM), and network detection and response (NDR) systems into a single solution that exposes serious and imminent threats to critical assets and empowers rapid response.
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