Analysis
- max time kernel
14s - max time network
81s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
24/05/2022, 12:20
General
- Target 792536cb7e72e25a03d2b9b2d54027106eb2003ab56f7104cd407f57693cfc2f.exe
- Size 425KB
- Sample220524-ph5hqaabc2
- SHA256 792536cb7e72e25a03d2b9b2d54027106eb2003ab56f7104cd407f57693cfc2f
Malware Config
Extracted
-
colibri
-
1.2.0
-
Build1
-
http://zpltcmgodhvvedxtfcygvbgjkvgvcguygytfigj.cc/gate.php
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http://yugyuvyugguitgyuigtfyutdtoghghbbgyv.cx/gate.php
Signatures
- Colibri Loader
A loader sold as MaaS first seen in August 2021.
- suricata: ET MALWARE Generic gate .php GET with minimal headers
suricata: ET MALWARE Generic gate .php GET with minimal headers
- suricata: ET MALWARE Win32/Colibri Loader Activity
suricata: ET MALWARE Win32/Colibri Loader Activity
- Executes dropped EXE 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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 use of WriteProcessMemory 3 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\792536cb7e72e25a03d2b9b2d54027106eb2003ab56f7104cd407f57693cfc2f.exe"C:\Users\Admin\AppData\Local\Temp\792536cb7e72e25a03d2b9b2d54027106eb2003ab56f7104cd407f57693cfc2f.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\tmpBCEC.tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmpBCEC.tmp.exe"2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Microsoft\WindowsApps\Get-Variable.exe"C:\Users\Admin\AppData\Local\Microsoft\WindowsApps\Get-Variable.exe"3⤵
-
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C:\Windows\SysWOW64\schtasks.exe/create /tn COMSurrogate /st 00:00 /du 9999:59 /sc once /ri 1 /f /tr "powershell.exe -windowstyle hidden"3⤵
- Creates scheduled task(s)
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-
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell.exe -windowstyle hidden1⤵
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C:\Users\Admin\AppData\Local\Microsoft\WindowsApps\Get-Variable.exe"C:\Users\Admin\AppData\Local\Microsoft\WindowsApps\Get-Variable.exe" Name host ValueOnly True2⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Get-Variable.exe
Get-Variable.exe
Get-Variable.exe
tmpBCEC.tmp.exe
tmpBCEC.tmp.exe
memory/3208-135-0x000000001EBF0000-0x000000001ECFA000-memory.dmp
memory/3208-137-0x000000001EB60000-0x000000001EB9C000-memory.dmp
memory/3208-136-0x000000001EB00000-0x000000001EB12000-memory.dmp
memory/3208-131-0x00007FF8C0B50000-0x00007FF8C1611000-memory.dmp
memory/3208-130-0x0000000000750000-0x00000000007BE000-memory.dmp
memory/4348-143-0x0000000000190000-0x00000000001A6000-memory.dmp
memory/4604-145-0x0000017863240000-0x0000017863284000-memory.dmp
memory/4604-144-0x000001784B050000-0x000001784B072000-memory.dmp
memory/4604-146-0x0000017864EC0000-0x0000017864F36000-memory.dmp
memory/4604-149-0x00007FF8C0B50000-0x00007FF8C1611000-memory.dmp
memory/4960-142-0x0000000000AF0000-0x0000000000B06000-memory.dmp