Analysis
- max time kernel
90s - max time network
73s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
15/04/2022, 00:53
General
- Target 1a59f7713b3a268e3363e5e56e598e5f43e53aef9b383615f7ae32b74ba6ed00.exe
- Size 952KB
- Sample220415-a8s52sach8
- SHA256 1a59f7713b3a268e3363e5e56e598e5f43e53aef9b383615f7ae32b74ba6ed00
Malware Config
Signatures
- MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- MassLogger Main Payload 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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 5 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\1a59f7713b3a268e3363e5e56e598e5f43e53aef9b383615f7ae32b74ba6ed00.exe"C:\Users\Admin\AppData\Local\Temp\1a59f7713b3a268e3363e5e56e598e5f43e53aef9b383615f7ae32b74ba6ed00.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\EfmHEjlztsos" /XML "C:\Users\Admin\AppData\Local\Temp\tmp805B.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\1a59f7713b3a268e3363e5e56e598e5f43e53aef9b383615f7ae32b74ba6ed00.exe"C:\Users\Admin\AppData\Local\Temp\1a59f7713b3a268e3363e5e56e598e5f43e53aef9b383615f7ae32b74ba6ed00.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell" Start-Sleep -Seconds 2; Remove-Item -path 'C:\Users\Admin\AppData\Local\Temp\1a59f7713b3a268e3363e5e56e598e5f43e53aef9b383615f7ae32b74ba6ed00.exe'3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
1a59f7713b3a268e3363e5e56e598e5f43e53aef9b383615f7ae32b74ba6ed00.exe.log
tmp805B.tmp
memory/1772-135-0x0000000004E20000-0x0000000004E76000-memory.dmp
memory/1772-133-0x0000000004C90000-0x0000000004D22000-memory.dmp
memory/1772-134-0x0000000004B60000-0x0000000004B6A000-memory.dmp
memory/1772-130-0x00000000000C0000-0x00000000001B6000-memory.dmp
memory/1772-132-0x0000000005240000-0x00000000057E4000-memory.dmp
memory/1772-131-0x0000000004BF0000-0x0000000004C8C000-memory.dmp
memory/4976-139-0x0000000000400000-0x0000000000486000-memory.dmp
memory/4976-141-0x0000000005380000-0x00000000053E6000-memory.dmp
memory/4988-143-0x0000000004F60000-0x0000000004F96000-memory.dmp
memory/4988-144-0x00000000055D0000-0x0000000005BF8000-memory.dmp
memory/4988-145-0x0000000005440000-0x0000000005462000-memory.dmp
memory/4988-146-0x00000000054E0000-0x0000000005546000-memory.dmp
memory/4988-147-0x00000000065A0000-0x00000000065BE000-memory.dmp
memory/4988-148-0x0000000004F55000-0x0000000004F57000-memory.dmp
memory/4988-149-0x0000000007ED0000-0x000000000854A000-memory.dmp
memory/4988-150-0x0000000006A80000-0x0000000006A9A000-memory.dmp
memory/4988-151-0x0000000007850000-0x00000000078E6000-memory.dmp
memory/4988-152-0x0000000006BB0000-0x0000000006BD2000-memory.dmp