orcus | cc9879ba8143f1ee15fd5400ea6632da1337970111467c362d7f0695c71d04d2

Reason

Machine shutdown

General

Target

Sigma.exe
Size

839KB
MD5

d82971472daf0f83934006c25abb88f4
SHA1

85178be08ca3583d530a87ea789e9ae4a9490c17
SHA256

cc9879ba8143f1ee15fd5400ea6632da1337970111467c362d7f0695c71d04d2
SHA512

a4210167fc7c02508e708ee12bd52876413425046496fdeccd2a0313cf1260f651411a35cc2a6e5b65a30f5542aae75f1d1741d616ff79f93a48d9669e61e42f
SSDEEP

24576:bBS04YNEMuExDiU6E5R9s8xY/2l/dGtnIbt+r7:bj4auS+UjfU2TGdIbt+r

Score

10^/10

orcus discovery rat spyware stealer

Malware Config

Extracted

Family

orcus

C2

?during-interesting.gl.at.ply.gg

Mutex

0b0ed56823694943a3c179d3184d2bd4

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
11/26/2024 11:40:25
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
2468	AudioDriver.exe

Loads dropped DLL 1 IoCs

pid	Process
2616	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
2468	AudioDriver.exe
2468	AudioDriver.exe
2468	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2468	AudioDriver.exe
Token: 33	1092	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1092	AUDIODG.EXE
Token: 33	1092	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1092	AUDIODG.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2468	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2468	AudioDriver.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2616 wrote to memory of 2468	2616	Sigma.exe	31
PID 2616 wrote to memory of 2468	2616	Sigma.exe	31
PID 2616 wrote to memory of 2468	2616	Sigma.exe	31
PID 2616 wrote to memory of 2468	2616	Sigma.exe	31

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:2616
- 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
  PID:2468

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
1⤵
PID:2652

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x47c
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1092

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
1⤵
PID:1712

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\CabE64C.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

Filesize
839KB

MD5
d82971472daf0f83934006c25abb88f4

SHA1
85178be08ca3583d530a87ea789e9ae4a9490c17

SHA256
cc9879ba8143f1ee15fd5400ea6632da1337970111467c362d7f0695c71d04d2

SHA512
a4210167fc7c02508e708ee12bd52876413425046496fdeccd2a0313cf1260f651411a35cc2a6e5b65a30f5542aae75f1d1741d616ff79f93a48d9669e61e42f

Download Submit
memory/2468-14-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download
memory/2468-13-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download
memory/2468-12-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download
memory/2468-15-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download
memory/2468-32-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download
memory/2468-33-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download
memory/2468-34-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download
memory/2616-2-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download
memory/2616-0-0x00000000746E1000-0x00000000746E2000-memory.dmp

Filesize
4KB

Download
memory/2616-11-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download
memory/2616-1-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

Errors