orcus | dd3ee854f6f62c1c964b74dc71fce2da6d29bdf1b8320f5173b1bce54e7c3413

General

Target

Kira.exe
Size

3.3MB
MD5

35e41d1dc3e84b3eea60b9809199f3fa
SHA1

b8d2154bb56f0ad94effa5e8c57f4b51e345bf73
SHA256

dd3ee854f6f62c1c964b74dc71fce2da6d29bdf1b8320f5173b1bce54e7c3413
SHA512

a1cd7dc83a0304c46fdf0fe4855880f4d97a18fdef321674a4d00bade7afd8ea64530c55e1a9bd1e1ffce196ee7957f5227d42fdb9f33ecda8b8fae29d11c77a
SSDEEP

49152:gHBVPVP2ym8r2JdVTWRh1/6/R1I9AihZZ7WEqnXrtRI93iS5TChmqrjyBE3Hi8uy:iRAMBChm+jwE3HSOZssBs+H

Score

10^/10

orcus discovery rat spyware stealer

Malware Config

Extracted

Family

orcus

C2

213.209.143.58:2095

Mutex

95c074471a264ae6acae057c3ed47a24

Attributes

autostart_method
TaskScheduler
enable_keylogger
true
install_path
%programfiles%\Nirsoft\sihost.exe
reconnect_delay
10000
registry_keyname
Orcus
taskscheduler_taskname
Realtek Audio Driver
watchdog_path
AppData\winsvrc.exe

Signatures

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

Orcurs Rat Executable 1 IoCs

resource	yara_rule
behavioral1/memory/3592-1-0x0000000006FF0000-0x00000000070D8000-memory.dmp	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-1-5-21-73851796-4078923053-1419757224-1000\Control Panel\International\Geo\Nation	Kira.exe

Executes dropped EXE 2 IoCs

pid	Process
4912	sihost.exe
2348	sihost.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Nirsoft\sihost.exe	Kira.exe
File created	C:\Program Files (x86)\Nirsoft\sihost.exe.config	Kira.exe
File opened for modification	C:\Program Files (x86)\Nirsoft\sihost.exe	Kira.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	Kira.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sihost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sihost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4912	sihost.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4912	sihost.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4912	sihost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4912	sihost.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3592 wrote to memory of 4912	3592	Kira.exe	90
PID 3592 wrote to memory of 4912	3592	Kira.exe	90
PID 3592 wrote to memory of 4912	3592	Kira.exe	90

C:\Users\Admin\AppData\Local\Temp\Kira.exe
"C:\Users\Admin\AppData\Local\Temp\Kira.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3592
- C:\Program Files (x86)\Nirsoft\sihost.exe
  "C:\Program Files (x86)\Nirsoft\sihost.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:4912

C:\Program Files (x86)\Nirsoft\sihost.exe
"C:\Program Files (x86)\Nirsoft\sihost.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2348

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

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\Nirsoft\sihost.exe

Filesize
3.3MB

MD5
35e41d1dc3e84b3eea60b9809199f3fa

SHA1
b8d2154bb56f0ad94effa5e8c57f4b51e345bf73

SHA256
dd3ee854f6f62c1c964b74dc71fce2da6d29bdf1b8320f5173b1bce54e7c3413

SHA512
a1cd7dc83a0304c46fdf0fe4855880f4d97a18fdef321674a4d00bade7afd8ea64530c55e1a9bd1e1ffce196ee7957f5227d42fdb9f33ecda8b8fae29d11c77a

Download Submit
C:\Program Files (x86)\Nirsoft\sihost.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
memory/3592-1-0x0000000006FF0000-0x00000000070D8000-memory.dmp

Filesize
928KB

Download
memory/3592-2-0x0000000006FA0000-0x0000000006FAE000-memory.dmp

Filesize
56KB

Download
memory/3592-3-0x00000000070E0000-0x000000000713C000-memory.dmp

Filesize
368KB

Download
memory/3592-4-0x0000000007140000-0x00000000076E6000-memory.dmp

Filesize
5.6MB

Download
memory/3592-5-0x0000000007750000-0x00000000077E2000-memory.dmp

Filesize
584KB

Download
memory/3592-6-0x0000000007920000-0x0000000007932000-memory.dmp

Filesize
72KB

Download
memory/3592-9-0x0000000004440000-0x0000000004525000-memory.dmp

Filesize
916KB

Download
memory/3592-0-0x0000000004440000-0x0000000004525000-memory.dmp

Filesize
916KB

Download
memory/4912-13-0x0000000007C50000-0x0000000007C68000-memory.dmp

Filesize
96KB

Download
memory/4912-19-0x0000000004300000-0x00000000043E5000-memory.dmp

Filesize
916KB

Download
memory/4912-10-0x0000000004300000-0x00000000043E5000-memory.dmp

Filesize
916KB

Download
memory/4912-14-0x0000000007E10000-0x0000000007E28000-memory.dmp

Filesize
96KB

Download
memory/4912-16-0x0000000007FE0000-0x00000000081A2000-memory.dmp

Filesize
1.8MB

Download
memory/4912-17-0x0000000007EA0000-0x0000000007EB0000-memory.dmp

Filesize
64KB

Download
memory/4912-18-0x0000000008DB0000-0x0000000008DBA000-memory.dmp

Filesize
40KB

Download
memory/4912-12-0x0000000007950000-0x000000000799E000-memory.dmp

Filesize
312KB

Download
memory/4912-20-0x0000000009500000-0x0000000009566000-memory.dmp

Filesize
408KB

Download
memory/4912-21-0x0000000009570000-0x0000000009B88000-memory.dmp

Filesize
6.1MB

Download
memory/4912-22-0x0000000009C30000-0x0000000009C42000-memory.dmp

Filesize
72KB

Download
memory/4912-23-0x0000000009C50000-0x0000000009C8C000-memory.dmp

Filesize
240KB

Download
memory/4912-24-0x0000000009CA0000-0x0000000009CEC000-memory.dmp

Filesize
304KB

Download
memory/4912-25-0x0000000009D80000-0x0000000009E8A000-memory.dmp

Filesize
1.0MB

Download

Analysis

Sharing