Analysis
- max time kernel
50s - max time network
140s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
20/01/2023, 04:18
General
- Target COAU8028849970-DN.exe
- Size 812KB
- Sample230120-ewybfsae96
- SHA256 fc34aca4f3035bcc925c891cb0c14aa20ba17b60d2d4f397a0327ce77e4c19bd
Malware Config
Signatures
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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 7 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 20 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\COAU8028849970-DN.exe"C:\Users\Admin\AppData\Local\Temp\COAU8028849970-DN.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\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KHLACIvZSTIeI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1A4E.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
tmp1A4E.tmp
memory/2500-147-0x0000000006A20000-0x0000000006BE2000-memory.dmp
memory/2500-146-0x00000000066A0000-0x00000000066F0000-memory.dmp
memory/2500-145-0x0000000005400000-0x0000000005466000-memory.dmp
memory/2500-144-0x0000000000400000-0x0000000000430000-memory.dmp
memory/3548-136-0x00000000055E0000-0x00000000055EA000-memory.dmp
memory/3548-137-0x0000000005720000-0x0000000005776000-memory.dmp
memory/3548-132-0x0000000000AC0000-0x0000000000B90000-memory.dmp
memory/3548-135-0x0000000005680000-0x000000000571C000-memory.dmp
memory/3548-134-0x0000000005540000-0x00000000055D2000-memory.dmp
memory/3548-133-0x0000000005AF0000-0x0000000006094000-memory.dmp