orcus | dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41

Analysis

max time kernel
149s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
19-12-2024 01:03

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General

Target

dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe
Size

924KB
MD5

58e4b372703004a321ab6c1a0d14536b
SHA1

68bb1f822b5d93a51156458f23dbaefcec75e035
SHA256

dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41
SHA512

c855082bff3256d04d4cc8874437fdfb6ee937b455527f910584b49cfe658ad37edb3a10acb09301c35d7d574de2aeeb13deb0c58e752375f3e8bbd6157c1e7f
SSDEEP

12288:m0XCGPSX0zbyD+ndg+QCImGYUl9qyzlkE2kUNCd6zONefAUUFEplMETQ7dG1lFlc:+mS4MROxnFE3F8rrcI0AilFEvxHjZQX

Score

10^/10

orcus build1 discovery persistence rat spyware stealer

Malware Config

Extracted

Family

orcus

Botnet

BUILD1

0.0.0.0:1268

Mutex

979c2ee9d7ff48d0a2e4e2df3c2c864d

Attributes

autostart_method
Registry
enable_keylogger
true
install_path
%programfiles%\Common Files\System\HD Audio\HDAudio.exe
reconnect_delay
10000
registry_keyname
HDAudioDriver
taskscheduler_taskname
HDAudioDriver
watchdog_path
AppData\HDAudioWatchdog.exe

Signatures

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

Orcus main payload 1 IoCs

resource	yara_rule
behavioral1/files/0x000700000001707c-30.dat	family_orcus

Orcurs Rat Executable 3 IoCs

resource	yara_rule
behavioral1/memory/2488-1-0x00000000001E0000-0x00000000002CE000-memory.dmp	orcus
behavioral1/files/0x000700000001707c-30.dat	orcus
behavioral1/memory/2708-31-0x0000000000E60000-0x0000000000F4E000-memory.dmp	orcus

Executes dropped EXE 6 IoCs

pid	Process
2684	WindowsInput.exe
2236	WindowsInput.exe
2708	HDAudio.exe
1560	HDAudioWatchdog.exe
2760	HDAudio.exe
276	HDAudioWatchdog.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\HDAudioDriver = "\"C:\\Program Files\\Common Files\\System\\HD Audio\\HDAudio.exe\""	HDAudio.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\WindowsInput.exe	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe.config	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe
File created	C:\Windows\SysWOW64\WindowsInput.InstallState	WindowsInput.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\HD Audio\HDAudio.exe	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe
File opened for modification	C:\Program Files\Common Files\System\HD Audio\HDAudio.exe	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe
File created	C:\Program Files\Common Files\System\HD Audio\HDAudio.exe.config	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HDAudioWatchdog.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HDAudioWatchdog.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
276	HDAudioWatchdog.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
2708	HDAudio.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe
276	HDAudioWatchdog.exe
2708	HDAudio.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2708	HDAudio.exe
Token: SeDebugPrivilege	1560	HDAudioWatchdog.exe
Token: SeDebugPrivilege	276	HDAudioWatchdog.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2708	HDAudio.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 2684	2488	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe	32
PID 2488 wrote to memory of 2684	2488	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe	32
PID 2488 wrote to memory of 2684	2488	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe	32
PID 2488 wrote to memory of 2708	2488	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe	34
PID 2488 wrote to memory of 2708	2488	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe	34
PID 2488 wrote to memory of 2708	2488	dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe	34
PID 2708 wrote to memory of 1560	2708	HDAudio.exe	36
PID 2708 wrote to memory of 1560	2708	HDAudio.exe	36
PID 2708 wrote to memory of 1560	2708	HDAudio.exe	36
PID 2708 wrote to memory of 1560	2708	HDAudio.exe	36
PID 2164 wrote to memory of 2760	2164	taskeng.exe	37
PID 2164 wrote to memory of 2760	2164	taskeng.exe	37
PID 2164 wrote to memory of 2760	2164	taskeng.exe	37
PID 1560 wrote to memory of 276	1560	HDAudioWatchdog.exe	38
PID 1560 wrote to memory of 276	1560	HDAudioWatchdog.exe	38
PID 1560 wrote to memory of 276	1560	HDAudioWatchdog.exe	38
PID 1560 wrote to memory of 276	1560	HDAudioWatchdog.exe	38

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe
"C:\Users\Admin\AppData\Local\Temp\dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41.exe"
1⤵
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\SysWOW64\WindowsInput.exe
  "C:\Windows\SysWOW64\WindowsInput.exe" --install
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:2684
- C:\Program Files\Common Files\System\HD Audio\HDAudio.exe
  "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2708
- - C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe
    "C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe" /launchSelfAndExit "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe" 2708
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1560
  - - C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe
      "C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe" /watchProcess "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe" 2708
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:276

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:2236

C:\Windows\system32\taskeng.exe
taskeng.exe {5FC87401-6444-4FE4-BC7E-43F544E88C76} S-1-5-21-1488793075-819845221-1497111674-1000:UPNECVIU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Program Files\Common Files\System\HD Audio\HDAudio.exe
  "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe"
  2⤵
  - Executes dropped EXE
  PID:2760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\Common Files\System\HD Audio\HDAudio.exe

Filesize
924KB

MD5
58e4b372703004a321ab6c1a0d14536b

SHA1
68bb1f822b5d93a51156458f23dbaefcec75e035

SHA256
dc24215a88cc28f21902e2eb3d378a8ed244389cd4315151864cef92324c0b41

SHA512
c855082bff3256d04d4cc8874437fdfb6ee937b455527f910584b49cfe658ad37edb3a10acb09301c35d7d574de2aeeb13deb0c58e752375f3e8bbd6157c1e7f

Download Submit
C:\Users\Admin\AppData\Roaming\HDAudioDriver\err_979c2ee9d7ff48d0a2e4e2df3c2c864d.dat

Filesize
1KB

MD5
d7d65c7cf9e2fccfbed11df2f1cdac62

SHA1
a14c83e4319ce5753947bd44dde949bff62f9560

SHA256
3522ca499be560919173edba5f79103e9ab4cfde558a087a87ba14a80b08a88d

SHA512
79f164268f86929b2406c832698278e4b5e1e549cf6c42fb2c87b9a66cb15924083510450f8497155e79902780c419c7e259195b777ff22cae099c81fdb89a2f

Download Submit
C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe

Filesize
9KB

MD5
913967b216326e36a08010fb70f9dba3

SHA1
7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

SHA256
8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

SHA512
c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe

Filesize
21KB

MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
memory/1560-47-0x0000000000890000-0x0000000000898000-memory.dmp

Filesize
32KB

Download
memory/2488-32-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2488-0-0x000007FEF5873000-0x000007FEF5874000-memory.dmp

Filesize
4KB

Download
memory/2488-6-0x00000000005E0000-0x00000000005E8000-memory.dmp

Filesize
32KB

Download
memory/2488-5-0x00000000005F0000-0x0000000000602000-memory.dmp

Filesize
72KB

Download
memory/2488-1-0x00000000001E0000-0x00000000002CE000-memory.dmp

Filesize
952KB

Download
memory/2488-7-0x0000000000600000-0x0000000000608000-memory.dmp

Filesize
32KB

Download
memory/2488-2-0x0000000000440000-0x000000000049C000-memory.dmp

Filesize
368KB

Download
memory/2488-3-0x00000000005A0000-0x00000000005AE000-memory.dmp

Filesize
56KB

Download
memory/2488-4-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2684-17-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2684-21-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2684-20-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2684-16-0x0000000001380000-0x000000000138C000-memory.dmp

Filesize
48KB

Download
memory/2708-31-0x0000000000E60000-0x0000000000F4E000-memory.dmp

Filesize
952KB

Download
memory/2708-35-0x0000000002350000-0x000000000239E000-memory.dmp

Filesize
312KB

Download
memory/2708-36-0x0000000000E30000-0x0000000000E48000-memory.dmp

Filesize
96KB

Download
memory/2708-37-0x00000000023A0000-0x00000000023B0000-memory.dmp

Filesize
64KB

Download