Analysis
- max time kernel
91s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
24/10/2022, 03:56
General
- Target ZNLXFKQOEHR.EXE.exe
- Size 6KB
- Sample221024-ehcslaedfk
- SHA256 e661db82b7389dfbad49ab5cc4aa55bab42dcf1f3fd87c424492c9401d4730b2
Malware Config
Extracted
-
agenttesla
-
https://api.telegram.org/bot5476328609:AAGdqIkYvW9rAMdHDWP-Prv8P3MRMPpndw0/
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\ZNLXFKQOEHR.EXE.exe"C:\Users\Admin\AppData\Local\Temp\ZNLXFKQOEHR.EXE.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANAA5AA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Local\Temp\ZNLXFKQOEHR.EXE.exeC:\Users\Admin\AppData\Local\Temp\ZNLXFKQOEHR.EXE.exe2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
ZNLXFKQOEHR.EXE.exe.log
memory/3320-133-0x00000000059A0000-0x00000000059C2000-memory.dmp
memory/3320-132-0x0000000000420000-0x0000000000428000-memory.dmp
memory/3860-149-0x00000000068A0000-0x00000000068AA000-memory.dmp
memory/3860-148-0x00000000068E0000-0x0000000006972000-memory.dmp
memory/3860-147-0x0000000006760000-0x00000000067B0000-memory.dmp
memory/3860-146-0x0000000004FC0000-0x000000000505C000-memory.dmp
memory/3860-145-0x0000000005440000-0x00000000059E4000-memory.dmp
memory/3860-143-0x0000000000400000-0x000000000043C000-memory.dmp
memory/5064-136-0x0000000005500000-0x0000000005B28000-memory.dmp
memory/5064-141-0x0000000006820000-0x000000000683A000-memory.dmp
memory/5064-140-0x0000000007BE0000-0x000000000825A000-memory.dmp
memory/5064-139-0x0000000006330000-0x000000000634E000-memory.dmp
memory/5064-138-0x0000000005CC0000-0x0000000005D26000-memory.dmp
memory/5064-137-0x0000000005BA0000-0x0000000005C06000-memory.dmp
memory/5064-135-0x0000000004D90000-0x0000000004DC6000-memory.dmp