Analysis
- max time kernel
90s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
06/02/2023, 14:29
General
- Target zmk2cH9YvualFtD.exe
- Size 750KB
- Sample230206-rtkc2aec89
- SHA256 4fc2e821a7e7d72363cbc61a1fb1ed5a4cd1c06c09b3794b1ac24ef2fd73b4fd
Malware Config
Extracted
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snakekeylogger
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https://api.telegram.org/bot5412042498:AAH4OVSAlB-9yvO0MxObTPVF8mPej6Ln4M4/sendMessage?chat_id=5573520537
Signatures
- Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
- Snake Keylogger payload 1 IoCs
- Disables RegEdit via registry modification 1 IoCs
- Disables Task Manager via registry modification
- 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
- Looks up external IP address via web service 1 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.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Modifies registry key 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious behavior: RenamesItself 1 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\zmk2cH9YvualFtD.exe"C:\Users\Admin\AppData\Local\Temp\zmk2cH9YvualFtD.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\SemwdizTOo.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\SemwdizTOo" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3F1C.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\zmk2cH9YvualFtD.exe"C:\Users\Admin\AppData\Local\Temp\zmk2cH9YvualFtD.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
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C:\Windows\SysWOW64\REG.exeREG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 1 /f3⤵
- Disables RegEdit via registry modification
- Modifies registry key
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
tmp3F1C.tmp
memory/2424-133-0x0000000005810000-0x0000000005DB4000-memory.dmp
memory/2424-134-0x0000000005260000-0x00000000052F2000-memory.dmp
memory/2424-135-0x0000000005230000-0x000000000523A000-memory.dmp
memory/2424-136-0x0000000008EB0000-0x0000000008F4C000-memory.dmp
memory/2424-132-0x00000000007D0000-0x0000000000890000-memory.dmp
memory/2620-142-0x0000000000400000-0x0000000000426000-memory.dmp
memory/2620-159-0x0000000006A40000-0x0000000006C02000-memory.dmp
memory/5068-146-0x0000000005BB0000-0x0000000005C16000-memory.dmp
memory/5068-152-0x0000000007500000-0x000000000751A000-memory.dmp
memory/5068-145-0x00000000053E0000-0x0000000005446000-memory.dmp
memory/5068-143-0x0000000005450000-0x0000000005A78000-memory.dmp
memory/5068-147-0x00000000061F0000-0x000000000620E000-memory.dmp
memory/5068-148-0x00000000071B0000-0x00000000071E2000-memory.dmp
memory/5068-149-0x0000000070D50000-0x0000000070D9C000-memory.dmp
memory/5068-150-0x0000000006790000-0x00000000067AE000-memory.dmp
memory/5068-151-0x0000000007B40000-0x00000000081BA000-memory.dmp
memory/5068-144-0x0000000005210000-0x0000000005232000-memory.dmp
memory/5068-153-0x0000000007570000-0x000000000757A000-memory.dmp
memory/5068-154-0x0000000007780000-0x0000000007816000-memory.dmp
memory/5068-155-0x0000000007730000-0x000000000773E000-memory.dmp
memory/5068-156-0x0000000007840000-0x000000000785A000-memory.dmp
memory/5068-157-0x0000000007820000-0x0000000007828000-memory.dmp
memory/5068-139-0x00000000028D0000-0x0000000002906000-memory.dmp