orcus | bd0bf0ab2a105a60f009019c56aafdc6dafcd7a45f8ab1a585a5bc5d1625b716

General

Target

Sigma.exe
Size

839KB
MD5

50c30c48da78a5da6c3930deeab5c162
SHA1

8ce696d3f74a75f99d3c29a107d940eba35cd13f
SHA256

bd0bf0ab2a105a60f009019c56aafdc6dafcd7a45f8ab1a585a5bc5d1625b716
SHA512

60175eaf8b6a895aa9bdc38ae00d30f83855f52457b120241bba9fcd8d83f5637aee55aa9993e034c3ea4f2310426ea04d69c15835375dd3915e39169def0809
SSDEEP

24576:nmIS04YNEMuExDiU6E5R9s8xY/2l/detnIbt+rx:mQ4auS+UjfU2TedIbt+r

Score

10^/10

orcus discovery rat spyware stealer

Malware Config

Extracted

Family

orcus

C2

/show-voice.gl.at.ply.gg

Mutex

daec0d2628f94459a99846d4958d238d

Attributes

administration_rights_required
false
anti_debugger
false
anti_tcp_analyzer
false
antivm
false
autostart_method
1
change_creation_date
false
force_installer_administrator_privileges
false
hide_file
false
install
false
installation_folder
%appdata%\Microsoft\Speech\AudioDriver.exe
installservice
false
keylogger_enabled
false
newcreationdate
12/19/2024 13:51:11
plugins
AgEAAA==
reconnect_delay
10000
registry_autostart_keyname
Audio HD Driver
registry_hidden_autostart
false
set_admin_flag
false
tasksch_name
Audio HD Driver
tasksch_request_highest_privileges
false
try_other_autostart_onfail
false

aes.plain

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
2448	AudioDriver.exe

Loads dropped DLL 1 IoCs

pid	Process
2868	Sigma.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	Sigma.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AudioDriver.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2448	AudioDriver.exe
2448	AudioDriver.exe
2448	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2448	AudioDriver.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2448	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2448	AudioDriver.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2448	AudioDriver.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2868 wrote to memory of 2448	2868	Sigma.exe	28
PID 2868 wrote to memory of 2448	2868	Sigma.exe	28
PID 2868 wrote to memory of 2448	2868	Sigma.exe	28
PID 2868 wrote to memory of 2448	2868	Sigma.exe	28

C:\Users\Admin\AppData\Local\Temp\Sigma.exe
"C:\Users\Admin\AppData\Local\Temp\Sigma.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe"
  2⤵
  - Executes dropped EXE
  - 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
  PID:2448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab9214.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe

Filesize
839KB

MD5
50c30c48da78a5da6c3930deeab5c162

SHA1
8ce696d3f74a75f99d3c29a107d940eba35cd13f

SHA256
bd0bf0ab2a105a60f009019c56aafdc6dafcd7a45f8ab1a585a5bc5d1625b716

SHA512
60175eaf8b6a895aa9bdc38ae00d30f83855f52457b120241bba9fcd8d83f5637aee55aa9993e034c3ea4f2310426ea04d69c15835375dd3915e39169def0809

Download Submit
memory/2448-12-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2448-13-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2448-14-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2448-31-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2448-32-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2868-0-0x0000000074C81000-0x0000000074C82000-memory.dmp

Filesize
4KB

Download
memory/2868-1-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2868-2-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2868-11-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download

Analysis

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