Analysis
- max time kernel
90s - max time network
154s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
18/05/2022, 11:59
General
- Target SecuriteInfo.com.Variant.Strictor.267077.13266.exe
- Size 914KB
- Sample220518-n5qgmscbgr
- SHA256 aba69f59df6e5913552e1dfd26ab7dc50225d62231958c85d7e2fb349544db2f
Malware Config
Extracted
-
agenttesla
-
http://136.144.41.76/sttwo/inc/bcd1a4ee0cf2c7.php
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- suricata: ET MALWARE AgentTesla Communicating with CnC Server
suricata: ET MALWARE AgentTesla Communicating with CnC Server
- 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
- 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.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Strictor.267077.13266.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Strictor.267077.13266.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\LKykRuUrP.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LKykRuUrP" /XML "C:\Users\Admin\AppData\Local\Temp\tmp55F0.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Strictor.267077.13266.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Strictor.267077.13266.exe"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
SecuriteInfo.com.Variant.Strictor.267077.13266.exe.log
tmp55F0.tmp
memory/220-131-0x00000000058C0000-0x0000000005E64000-memory.dmp
memory/220-132-0x0000000005310000-0x00000000053A2000-memory.dmp
memory/220-133-0x0000000005260000-0x000000000526A000-memory.dmp
memory/220-134-0x0000000008D30000-0x0000000008DCC000-memory.dmp
memory/220-135-0x0000000009870000-0x00000000098D6000-memory.dmp
memory/220-130-0x00000000007D0000-0x00000000008BC000-memory.dmp
memory/1492-154-0x0000000006D70000-0x0000000006DC0000-memory.dmp
memory/1492-142-0x0000000000400000-0x000000000043A000-memory.dmp
memory/3116-151-0x0000000007260000-0x000000000727A000-memory.dmp
memory/3116-150-0x00000000078B0000-0x0000000007F2A000-memory.dmp
memory/3116-138-0x0000000002660000-0x0000000002696000-memory.dmp
memory/3116-144-0x0000000004F80000-0x0000000004FA2000-memory.dmp
memory/3116-145-0x00000000056A0000-0x0000000005706000-memory.dmp
memory/3116-146-0x0000000005F50000-0x0000000005F6E000-memory.dmp
memory/3116-147-0x0000000006520000-0x0000000006552000-memory.dmp
memory/3116-148-0x00000000709D0000-0x0000000070A1C000-memory.dmp
memory/3116-149-0x0000000006500000-0x000000000651E000-memory.dmp
memory/3116-140-0x0000000005070000-0x0000000005698000-memory.dmp
memory/3116-157-0x0000000007580000-0x0000000007588000-memory.dmp
memory/3116-152-0x00000000072E0000-0x00000000072EA000-memory.dmp
memory/3116-153-0x00000000074E0000-0x0000000007576000-memory.dmp
memory/3116-155-0x0000000007490000-0x000000000749E000-memory.dmp
memory/3116-156-0x00000000075A0000-0x00000000075BA000-memory.dmp