Analysis
- max time kernel
133s - max time network
161s - platform
windows10-2004_x64 - resource
win10v2004-en-20220113 - submitted
28/03/2022, 10:17
General
- Target Purchase Order15422.exe
- Size 1.2MB
- Sample220328-mbcs1sheb2
- SHA256 1a9e9deb92ea9d2cd35f94b5b0cfaecfd353fe71d886aa0ee4da2d7b454427aa
Malware Config
Extracted
-
asyncrat
-
0.5.7B
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Default
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asjdfnaf;ma;lsd6SI8OkPnk
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delay
3
-
install
false
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install_folder
%AppData%
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pastebin_config
https://pastebin.com/raw/Msa6vJjt
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
- Async RAT payload 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- 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 11 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Purchase Order15422.exe"C:\Users\Admin\AppData\Local\Temp\Purchase Order15422.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\ulGvEhQeF.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\ulGvEhQeF" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6CAD.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"2⤵
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
tmp6CAD.tmp
memory/1672-131-0x0000000005AF0000-0x0000000006094000-memory.dmp
memory/1672-132-0x0000000005490000-0x0000000005522000-memory.dmp
memory/1672-133-0x0000000005460000-0x000000000546A000-memory.dmp
memory/1672-134-0x0000000009010000-0x00000000090AC000-memory.dmp
memory/1672-130-0x00000000009A0000-0x0000000000ACE000-memory.dmp
memory/4060-141-0x0000000000400000-0x0000000000412000-memory.dmp
memory/4260-142-0x0000000005DD0000-0x0000000005DF2000-memory.dmp
memory/4260-148-0x0000000071450000-0x000000007149C000-memory.dmp
memory/4260-137-0x0000000004FB0000-0x0000000004FE6000-memory.dmp
memory/4260-143-0x0000000005EC0000-0x0000000005F26000-memory.dmp
memory/4260-144-0x0000000005F30000-0x0000000005F96000-memory.dmp
memory/4260-145-0x0000000006560000-0x000000000657E000-memory.dmp
memory/4260-146-0x0000000005065000-0x0000000005067000-memory.dmp
memory/4260-147-0x0000000006B10000-0x0000000006B42000-memory.dmp
memory/4260-139-0x00000000056A0000-0x0000000005CC8000-memory.dmp
memory/4260-149-0x0000000006AF0000-0x0000000006B0E000-memory.dmp
memory/4260-150-0x0000000007F10000-0x000000000858A000-memory.dmp
memory/4260-151-0x0000000006C10000-0x0000000006C2A000-memory.dmp
memory/4260-152-0x00000000078D0000-0x00000000078DA000-memory.dmp
memory/4260-153-0x0000000007AE0000-0x0000000007B76000-memory.dmp
memory/4260-154-0x0000000007A90000-0x0000000007A9E000-memory.dmp
memory/4260-155-0x0000000007BA0000-0x0000000007BBA000-memory.dmp
memory/4260-156-0x0000000007B80000-0x0000000007B88000-memory.dmp