orcus | a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e

General

Target

a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e.exe
Size

904KB
MD5

06085978cd81457dc5ecbed3cff9f61c
SHA1

66aae4ed1eeb563a6100a42a8734733bb6d68665
SHA256

a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e
SHA512

9e9e3d01fe2540b845f9a965753a47d8780c2f95eaa16f3d7c9832452e168876eb72b5933ddf0cb2e5474c9370957557ad50c0809d34fe012ddf2901cb5158d0
SSDEEP

24576:IAi4MROxnFHOVrrcI0AilFEvxHPPcooN:IgMiJ8rrcI0AilFEvxHP

Score

10^/10

orcus discovery rat spyware stealer

Malware Config

Extracted

Family

orcus

C2

b7fscoc.localto.net:8763

Mutex

cf06369f7b98472f97643448b3df76ba

Attributes

autostart_method
Registry
enable_keylogger
true
install_path
%appdata%\Roaming\am1\RuntimeBroker.exe
reconnect_delay
10000
registry_keyname
RuntimeBroker
taskscheduler_taskname
RuntimeBroker
watchdog_path
AppData\OrcusWatchdog.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
behavioral2/files/0x0008000000023c9f-13.dat	family_orcus

Orcurs Rat Executable 2 IoCs

resource	yara_rule
behavioral2/memory/1972-1-0x0000000000E10000-0x0000000000EF8000-memory.dmp	orcus
behavioral2/files/0x0008000000023c9f-13.dat	orcus

Checks computer location settings 2 TTPs 1 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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e.exe

Executes dropped EXE 1 IoCs

pid	Process
2364	RuntimeBroker.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	a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RuntimeBroker.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2364	RuntimeBroker.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2364	RuntimeBroker.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2364	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2364	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 2364	1972	a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e.exe	86
PID 1972 wrote to memory of 2364	1972	a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e.exe	86
PID 1972 wrote to memory of 2364	1972	a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e.exe	86

C:\Users\Admin\AppData\Local\Temp\a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e.exe
"C:\Users\Admin\AppData\Local\Temp\a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Users\Admin\AppData\Roaming\Roaming\am1\RuntimeBroker.exe
  "C:\Users\Admin\AppData\Roaming\Roaming\am1\RuntimeBroker.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:2364

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\Roaming\Roaming\am1\RuntimeBroker.exe

Filesize
904KB

MD5
06085978cd81457dc5ecbed3cff9f61c

SHA1
66aae4ed1eeb563a6100a42a8734733bb6d68665

SHA256
a15b51fb441f08f3fce60ae2c9e21a99b08daaf83aa0945f9736415da2e70f8e

SHA512
9e9e3d01fe2540b845f9a965753a47d8780c2f95eaa16f3d7c9832452e168876eb72b5933ddf0cb2e5474c9370957557ad50c0809d34fe012ddf2901cb5158d0

Download Submit
C:\Users\Admin\AppData\Roaming\Roaming\am1\RuntimeBroker.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
memory/1972-3-0x0000000074C90000-0x0000000075440000-memory.dmp

Filesize
7.7MB

Download
memory/1972-1-0x0000000000E10000-0x0000000000EF8000-memory.dmp

Filesize
928KB

Download
memory/1972-0-0x0000000074C9E000-0x0000000074C9F000-memory.dmp

Filesize
4KB

Download
memory/1972-5-0x0000000006020000-0x00000000065C4000-memory.dmp

Filesize
5.6MB

Download
memory/1972-6-0x0000000005A70000-0x0000000005B02000-memory.dmp

Filesize
584KB

Download
memory/1972-7-0x0000000005F10000-0x0000000005F22000-memory.dmp

Filesize
72KB

Download
memory/1972-2-0x0000000003390000-0x000000000339E000-memory.dmp

Filesize
56KB

Download
memory/1972-4-0x00000000058E0000-0x000000000593C000-memory.dmp

Filesize
368KB

Download
memory/1972-23-0x0000000074C90000-0x0000000075440000-memory.dmp

Filesize
7.7MB

Download
memory/2364-22-0x0000000074C90000-0x0000000075440000-memory.dmp

Filesize
7.7MB

Download
memory/2364-25-0x00000000065C0000-0x00000000065D8000-memory.dmp

Filesize
96KB

Download
memory/2364-24-0x0000000005B90000-0x0000000005BDE000-memory.dmp

Filesize
312KB

Download
memory/2364-27-0x0000000006740000-0x0000000006750000-memory.dmp

Filesize
64KB

Download
memory/2364-26-0x00000000068F0000-0x0000000006AB2000-memory.dmp

Filesize
1.8MB

Download
memory/2364-28-0x0000000006EC0000-0x0000000006ECA000-memory.dmp

Filesize
40KB

Download
memory/2364-29-0x0000000074C90000-0x0000000075440000-memory.dmp

Filesize
7.7MB

Download

Analysis

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