orcus | 40e91c8d3caf657b3a154ce8f801acd5ce2ed18639f82fe16c42d7603794d341

General

Target

40e91c8d3caf657b3a154ce8f801acd5ce2ed18639f82fe16c42d7603794d341.exe
Size

849KB
MD5

896c0c618b75a47c9c01eed243f723f9
SHA1

db26f292ad04f287714dafddc6d22b6455888dbf
SHA256

40e91c8d3caf657b3a154ce8f801acd5ce2ed18639f82fe16c42d7603794d341
SHA512

a51732a6b8839be3d525f6566a34bb33efdd8e854f7fd9b88ccc706fa9c047e9d4b64dfe0d79b2dc8661d4e3352f279e623115ff2dc3afa4d13de5dd01c973e8
SSDEEP

24576:4FS04YNEMuExDiU6E5R9s8xY/2l/drtnIbt+rdp:434auS+UjfU2TrdIbt+rv

Score

10^/10

orcus discovery rat spyware stealer

Malware Config

Extracted

Family

orcus

Signatures

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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	40e91c8d3caf657b3a154ce8f801acd5ce2ed18639f82fe16c42d7603794d341.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	Script.exe

Executes dropped EXE 2 IoCs

pid	Process
3744	Script.exe
4232	AudioDriver.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	Script.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	Script.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	Script.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	Script.exe
File opened for modification	C:\Windows\assembly	Script.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 3 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	40e91c8d3caf657b3a154ce8f801acd5ce2ed18639f82fe16c42d7603794d341.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Script.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AudioDriver.exe

Suspicious behavior: EnumeratesProcesses 36 IoCs

pid	Process
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe
4232	AudioDriver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4232	AudioDriver.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4232	AudioDriver.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4232	AudioDriver.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4508 wrote to memory of 3744	4508	40e91c8d3caf657b3a154ce8f801acd5ce2ed18639f82fe16c42d7603794d341.exe	83
PID 4508 wrote to memory of 3744	4508	40e91c8d3caf657b3a154ce8f801acd5ce2ed18639f82fe16c42d7603794d341.exe	83
PID 4508 wrote to memory of 3744	4508	40e91c8d3caf657b3a154ce8f801acd5ce2ed18639f82fe16c42d7603794d341.exe	83
PID 3744 wrote to memory of 4232	3744	Script.exe	84
PID 3744 wrote to memory of 4232	3744	Script.exe	84
PID 3744 wrote to memory of 4232	3744	Script.exe	84

C:\Users\Admin\AppData\Local\Temp\40e91c8d3caf657b3a154ce8f801acd5ce2ed18639f82fe16c42d7603794d341.exe
"C:\Users\Admin\AppData\Local\Temp\40e91c8d3caf657b3a154ce8f801acd5ce2ed18639f82fe16c42d7603794d341.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4508
- C:\Users\Admin\AppData\Local\Temp\Script.exe
  "C:\Users\Admin\AppData\Local\Temp\Script.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3744
- - C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe"
    3⤵
    - 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:4232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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\Script.exe

Filesize
839KB

MD5
98a5ba2b1804e05fd8d361429c538d5e

SHA1
ff979f68614cdddf6db17ff574a51153fd6358bd

SHA256
502302c8b6270b082df08e81c96bde54a220bd6ae2a8ae3b08100529e2a7a753

SHA512
ad7ac8fa9511b973dbf5cd691a6d2ebb265e9eeb8549872751d89e8f8f71ca70a8dcc6e5cfa7b678d6cd9ce61096d5536792eb53244eff08ae0ee8fc91b3a478

Download Submit
memory/3744-12-0x0000000074F82000-0x0000000074F83000-memory.dmp

Filesize
4KB

Download
memory/3744-13-0x0000000074F80000-0x0000000075531000-memory.dmp

Filesize
5.7MB

Download
memory/3744-14-0x0000000074F80000-0x0000000075531000-memory.dmp

Filesize
5.7MB

Download
memory/3744-30-0x0000000074F80000-0x0000000075531000-memory.dmp

Filesize
5.7MB

Download
memory/4232-32-0x0000000074F80000-0x0000000075531000-memory.dmp

Filesize
5.7MB

Download
memory/4232-31-0x0000000074F80000-0x0000000075531000-memory.dmp

Filesize
5.7MB

Download
memory/4232-33-0x0000000074F80000-0x0000000075531000-memory.dmp

Filesize
5.7MB

Download
memory/4508-10-0x0000000000400000-0x00000000004DC000-memory.dmp

Filesize
880KB

Download

Analysis

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