orcus | 20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132

Analysis

max time kernel
150s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-12-2024 01:04

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General

Target

20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe
Size

5.0MB
MD5

b4df4594ac31598703ab5e52af43d8fd
SHA1

89bee8739fefe1e10ba55dadbb0a17d83576eec4
SHA256

20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132
SHA512

fe9983d88a855b4cbf4746c9b5cc197ca335d94246fdc86d09b7e2f369fa8e95bb6fe4101e51648e7dfb6b7afc02b59fd42c4bfa2498d1372a31ca01c439db19
SSDEEP

24576:eEu4MROxnFe3idtrrcI0AilFEvxHPfmooN:eIMiwkrrcI0AilFEvxHP

Score

10^/10

orcus test hack discovery persistence rat spyware stealer

Malware Config

Extracted

Family

orcus

Botnet

Test Hack

127.0.0.1:10134

Mutex

de4e6099f84e48d89e40ea74092aa6a9

Attributes

autostart_method
Registry
enable_keylogger
true
install_path
%programfiles%\HDAudioDriver\HDAudioDriver.exe
reconnect_delay
10000
registry_keyname
Realtek_audio_driver
taskscheduler_taskname
Orcus
watchdog_path
Temp\chrome.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/0x000700000001867d-15.dat	family_orcus

Orcurs Rat Executable 3 IoCs

resource	yara_rule
behavioral1/memory/2792-1-0x00000000011A0000-0x000000000128A000-memory.dmp	orcus
behavioral1/files/0x000700000001867d-15.dat	orcus
behavioral1/memory/2720-20-0x0000000000FB0000-0x000000000109A000-memory.dmp	orcus

Executes dropped EXE 3 IoCs

pid	Process
2720	HDAudioDriver.exe
2864	chrome.exe
2384	chrome.exe

Loads dropped DLL 3 IoCs

pid	Process
2792	20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe
2720	HDAudioDriver.exe
2864	chrome.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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\Realtek_audio_driver = "\"C:\\Program Files (x86)\\HDAudioDriver\\HDAudioDriver.exe\""	HDAudioDriver.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\HDAudioDriver\HDAudioDriver.exe	20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe
File opened for modification	C:\Program Files (x86)\HDAudioDriver\HDAudioDriver.exe	20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe
File created	C:\Program Files (x86)\HDAudioDriver\HDAudioDriver.exe.config	20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.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 4 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	20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HDAudioDriver.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chrome.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chrome.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2384	chrome.exe
2384	chrome.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2720	HDAudioDriver.exe
2720	HDAudioDriver.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2384	chrome.exe
2720	HDAudioDriver.exe
2384	chrome.exe
2720	HDAudioDriver.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2720	HDAudioDriver.exe
Token: SeDebugPrivilege	2864	chrome.exe
Token: SeDebugPrivilege	2384	chrome.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2720	HDAudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2720	HDAudioDriver.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2720	HDAudioDriver.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2792 wrote to memory of 2720	2792	20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe	31
PID 2792 wrote to memory of 2720	2792	20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe	31
PID 2792 wrote to memory of 2720	2792	20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe	31
PID 2792 wrote to memory of 2720	2792	20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe	31
PID 2720 wrote to memory of 2864	2720	HDAudioDriver.exe	32
PID 2720 wrote to memory of 2864	2720	HDAudioDriver.exe	32
PID 2720 wrote to memory of 2864	2720	HDAudioDriver.exe	32
PID 2720 wrote to memory of 2864	2720	HDAudioDriver.exe	32
PID 2864 wrote to memory of 2384	2864	chrome.exe	33
PID 2864 wrote to memory of 2384	2864	chrome.exe	33
PID 2864 wrote to memory of 2384	2864	chrome.exe	33
PID 2864 wrote to memory of 2384	2864	chrome.exe	33

C:\Users\Admin\AppData\Local\Temp\20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe
"C:\Users\Admin\AppData\Local\Temp\20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2792
- C:\Program Files (x86)\HDAudioDriver\HDAudioDriver.exe
  "C:\Program Files (x86)\HDAudioDriver\HDAudioDriver.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Users\Admin\AppData\Local\Temp\chrome.exe
    "C:\Users\Admin\AppData\Local\Temp\chrome.exe" /launchSelfAndExit "C:\Program Files (x86)\HDAudioDriver\HDAudioDriver.exe" 2720 /protectFile
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2864
  - - C:\Users\Admin\AppData\Local\Temp\chrome.exe
      "C:\Users\Admin\AppData\Local\Temp\chrome.exe" /watchProcess "C:\Program Files (x86)\HDAudioDriver\HDAudioDriver.exe" 2720 "/protectFile"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2384

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

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 (x86)\HDAudioDriver\HDAudioDriver.exe

Filesize
5.0MB

MD5
b4df4594ac31598703ab5e52af43d8fd

SHA1
89bee8739fefe1e10ba55dadbb0a17d83576eec4

SHA256
20980da93a018ee5e8d8eb95bb21620244c4a7e56c92d8fc657f3fa9c58e4132

SHA512
fe9983d88a855b4cbf4746c9b5cc197ca335d94246fdc86d09b7e2f369fa8e95bb6fe4101e51648e7dfb6b7afc02b59fd42c4bfa2498d1372a31ca01c439db19

Download Submit
C:\Program Files (x86)\HDAudioDriver\HDAudioDriver.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
C:\Users\Admin\AppData\Local\Temp\chrome.exe

Filesize
9KB

MD5
913967b216326e36a08010fb70f9dba3

SHA1
7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

SHA256
8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

SHA512
c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

Download Submit
C:\Users\Admin\AppData\Roaming\HDAudioDriver\err_de4e6099f84e48d89e40ea74092aa6a9.dat

Filesize
1KB

MD5
ec8f2cde94b5ef7b7645dbc2edc1dfca

SHA1
d73cfa7533542be6cecde63a83b8b9b75350fedd

SHA256
755073260bd46ede705e3abd42ebfec11268db8470a2cc944e3987b56e837399

SHA512
90e4d8139fcc9216633d60406307360246daaa570c27bdbc422ab73941e489f2d7dcdcf219d5becedc1a0a08eeb3256ca13d71d39d312653c8e18e1a2e5b1e62

Download Submit
memory/2720-26-0x0000000000DE0000-0x0000000000DF8000-memory.dmp

Filesize
96KB

Download
memory/2720-27-0x0000000000B00000-0x0000000000B10000-memory.dmp

Filesize
64KB

Download
memory/2720-41-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2720-40-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2720-19-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2720-25-0x0000000000D90000-0x0000000000DDE000-memory.dmp

Filesize
312KB

Download
memory/2720-22-0x0000000000510000-0x0000000000522000-memory.dmp

Filesize
72KB

Download
memory/2720-20-0x0000000000FB0000-0x000000000109A000-memory.dmp

Filesize
936KB

Download
memory/2720-21-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2792-3-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2792-2-0x0000000000510000-0x000000000051E000-memory.dmp

Filesize
56KB

Download
memory/2792-0-0x000000007465E000-0x000000007465F000-memory.dmp

Filesize
4KB

Download
memory/2792-17-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2792-5-0x0000000000640000-0x0000000000652000-memory.dmp

Filesize
72KB

Download
memory/2792-1-0x00000000011A0000-0x000000000128A000-memory.dmp

Filesize
936KB

Download
memory/2792-4-0x00000000005A0000-0x00000000005FC000-memory.dmp

Filesize
368KB

Download
memory/2792-6-0x0000000000B00000-0x0000000000B08000-memory.dmp

Filesize
32KB

Download
memory/2864-37-0x0000000000E50000-0x0000000000E58000-memory.dmp

Filesize
32KB

Download