orcus | e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc

Analysis

max time kernel
149s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23-12-2024 01:14

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General

Target

e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe
Size

924KB
MD5

9e53bae3cb9c718150dc1fb75c7074de
SHA1

254d181da66607785bab9175f7e6efbedf09b7b9
SHA256

e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc
SHA512

d952b9d1307cffc5c0bda543a9f4edeaede19415368dbbdeffb8009a96bacda6f14e1013565d1f8de57334ebb671d1ac8345b833de5aedfe5adcbbbeee14a136
SSDEEP

12288:E0XCGPSX0zbyD+ndg+QCImGYUl9qyzlkE2kUNCd6zONefAUUFEplMETQ7dG1lFlu:AmS4MROxnFE3FPrrcI0AilFEvxHj2QX

Score

10^/10

orcus testbuild discovery persistence rat spyware stealer

Malware Config

Extracted

Family

orcus

Botnet

testbuild

127.0.0.1:1268

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/0x0007000000015f71-29.dat	family_orcus

Orcurs Rat Executable 3 IoCs

resource	yara_rule
behavioral1/memory/3000-1-0x0000000000A50000-0x0000000000B3E000-memory.dmp	orcus
behavioral1/files/0x0007000000015f71-29.dat	orcus
behavioral1/memory/2832-32-0x0000000000970000-0x0000000000A5E000-memory.dmp	orcus

Executes dropped EXE 6 IoCs

pid	Process
2688	WindowsInput.exe
2840	WindowsInput.exe
2832	HDAudio.exe
680	HDAudio.exe
1496	HDAudioWatchdog.exe
1296	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-1-5-21-4177215427-74451935-3209572229-1000\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	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe.config	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.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	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe
File opened for modification	C:\Program Files\Common Files\System\HD Audio\HDAudio.exe	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe
File created	C:\Program Files\Common Files\System\HD Audio\HDAudio.exe.config	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.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
1296	HDAudioWatchdog.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
2832	HDAudio.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe
2832	HDAudio.exe
1296	HDAudioWatchdog.exe
1296	HDAudioWatchdog.exe
2832	HDAudio.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2832	HDAudio.exe
Token: SeDebugPrivilege	1496	HDAudioWatchdog.exe
Token: SeDebugPrivilege	1296	HDAudioWatchdog.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2832	HDAudio.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3000 wrote to memory of 2688	3000	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe	31
PID 3000 wrote to memory of 2688	3000	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe	31
PID 3000 wrote to memory of 2688	3000	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe	31
PID 3000 wrote to memory of 2832	3000	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe	33
PID 3000 wrote to memory of 2832	3000	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe	33
PID 3000 wrote to memory of 2832	3000	e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe	33
PID 2332 wrote to memory of 680	2332	taskeng.exe	35
PID 2332 wrote to memory of 680	2332	taskeng.exe	35
PID 2332 wrote to memory of 680	2332	taskeng.exe	35
PID 2832 wrote to memory of 1496	2832	HDAudio.exe	36
PID 2832 wrote to memory of 1496	2832	HDAudio.exe	36
PID 2832 wrote to memory of 1496	2832	HDAudio.exe	36
PID 2832 wrote to memory of 1496	2832	HDAudio.exe	36
PID 1496 wrote to memory of 1296	1496	HDAudioWatchdog.exe	37
PID 1496 wrote to memory of 1296	1496	HDAudioWatchdog.exe	37
PID 1496 wrote to memory of 1296	1496	HDAudioWatchdog.exe	37
PID 1496 wrote to memory of 1296	1496	HDAudioWatchdog.exe	37

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\e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe
"C:\Users\Admin\AppData\Local\Temp\e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc.exe"
1⤵
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Windows\SysWOW64\WindowsInput.exe
  "C:\Windows\SysWOW64\WindowsInput.exe" --install
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:2688
- 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:2832
- - 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" 2832
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1496
  - - 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" 2832
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1296

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:2840

C:\Windows\system32\taskeng.exe
taskeng.exe {B524F44C-A72C-4CB0-805F-CA89DB641356} S-1-5-21-4177215427-74451935-3209572229-1000:JSMURNPT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2332
- 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:680

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
9e53bae3cb9c718150dc1fb75c7074de

SHA1
254d181da66607785bab9175f7e6efbedf09b7b9

SHA256
e635ffdeb402924e63d04502f88b9cb53697f7fd3be91af4906a811502970abc

SHA512
d952b9d1307cffc5c0bda543a9f4edeaede19415368dbbdeffb8009a96bacda6f14e1013565d1f8de57334ebb671d1ac8345b833de5aedfe5adcbbbeee14a136

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

Filesize
1KB

MD5
3d0e53c3929117179fdfc77621e6717f

SHA1
1bc62ec02405d4555ef248c6b4d3be4046e1774c

SHA256
dd1875de855e93c38bba8090e574cba23a6649f2887c32cb231ca00a7d07e6e3

SHA512
4a0fc4fffa747adf9632004a8cd9c9606910ff4c1bee83c687bc74909b4ff37b942cc0f1cd518ad100e4e95d2ef8f497e6c51083f2eeddeefe90f4802d5c40ff

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/1496-49-0x0000000000F20000-0x0000000000F28000-memory.dmp

Filesize
32KB

Download
memory/2688-16-0x00000000008D0000-0x00000000008DC000-memory.dmp

Filesize
48KB

Download
memory/2688-21-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

Filesize
9.9MB

Download
memory/2688-20-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

Filesize
9.9MB

Download
memory/2688-17-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

Filesize
9.9MB

Download
memory/2832-34-0x00000000003A0000-0x00000000003B2000-memory.dmp

Filesize
72KB

Download
memory/2832-37-0x0000000002230000-0x000000000227E000-memory.dmp

Filesize
312KB

Download
memory/2832-39-0x0000000002090000-0x00000000020A0000-memory.dmp

Filesize
64KB

Download
memory/2832-38-0x0000000002280000-0x0000000002298000-memory.dmp

Filesize
96KB

Download
memory/2832-32-0x0000000000970000-0x0000000000A5E000-memory.dmp

Filesize
952KB

Download
memory/2840-23-0x00000000000C0000-0x00000000000CC000-memory.dmp

Filesize
48KB

Download
memory/3000-4-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

Filesize
9.9MB

Download
memory/3000-33-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

Filesize
9.9MB

Download
memory/3000-0-0x000007FEF5103000-0x000007FEF5104000-memory.dmp

Filesize
4KB

Download
memory/3000-3-0x00000000002D0000-0x00000000002DE000-memory.dmp

Filesize
56KB

Download
memory/3000-7-0x0000000000A20000-0x0000000000A28000-memory.dmp

Filesize
32KB

Download
memory/3000-5-0x0000000000A10000-0x0000000000A22000-memory.dmp

Filesize
72KB

Download
memory/3000-6-0x0000000000A00000-0x0000000000A08000-memory.dmp

Filesize
32KB

Download
memory/3000-2-0x00000000009A0000-0x00000000009FC000-memory.dmp

Filesize
368KB

Download
memory/3000-1-0x0000000000A50000-0x0000000000B3E000-memory.dmp

Filesize
952KB

Download