orcus | 1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791

General

Target

1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe
Size

3.1MB
MD5

e9bf15e3bb0040201e71a08b6148c4c8
SHA1

77f60f9328596ada8d2b7fd0fd03914004726f59
SHA256

1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791
SHA512

cbd2fc46d6df126434e8dd25503122ee172a99a37efefec129da9d7c9bdfc5f705a19e218e746a54d08ad28196a9ec471030039fcb88ca09392af66b42ee5d1f
SSDEEP

49152:kUqN8QFUwqYZeM9/ZzzBjMkPUayX82+YXAypQxb9ndo9JnCmYZncFf0I74gu3eM:kt0wGGzBjryX82uypSb9ndo9JCm

Score

10^/10

orcus persistence rat spyware stealer

Malware Config

Extracted

Family

orcus

C2

192.168.50.155:10134

Mutex

df25dda70009431f9a1c62b7dc35a8ee

Attributes

autostart_method
Registry
enable_keylogger
true
install_path
%programfiles%\ssystem\ssystem.exe
reconnect_delay
10000
registry_keyname
ssystem
taskscheduler_taskname
ssystem
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

Orcurs Rat Executable 3 IoCs

resource	yara_rule
behavioral1/memory/1272-1-0x0000000000DC0000-0x00000000010D4000-memory.dmp	orcus
behavioral1/files/0x0016000000018657-28.dat	orcus
behavioral1/memory/2872-32-0x00000000012C0000-0x00000000015D4000-memory.dmp	orcus

Executes dropped EXE 4 IoCs

pid	Process
1712	WindowsInput.exe
2840	WindowsInput.exe
2872	ssystem.exe
2616	ssystem.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\ssystem = "\"C:\\Program Files\\ssystem\\ssystem.exe\""	ssystem.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\WindowsInput.InstallState	WindowsInput.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe.config	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files\ssystem\ssystem.exe	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe
File opened for modification	C:\Program Files\ssystem\ssystem.exe	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe
File created	C:\Program Files\ssystem\ssystem.exe.config	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2872	ssystem.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2872	ssystem.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1272 wrote to memory of 1712	1272	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe	30
PID 1272 wrote to memory of 1712	1272	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe	30
PID 1272 wrote to memory of 1712	1272	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe	30
PID 1272 wrote to memory of 2872	1272	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe	32
PID 1272 wrote to memory of 2872	1272	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe	32
PID 1272 wrote to memory of 2872	1272	1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe	32
PID 2720 wrote to memory of 2616	2720	taskeng.exe	34
PID 2720 wrote to memory of 2616	2720	taskeng.exe	34
PID 2720 wrote to memory of 2616	2720	taskeng.exe	34

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe
"C:\Users\Admin\AppData\Local\Temp\1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791.exe"
1⤵
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1272
- C:\Windows\SysWOW64\WindowsInput.exe
  "C:\Windows\SysWOW64\WindowsInput.exe" --install
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:1712
- C:\Program Files\ssystem\ssystem.exe
  "C:\Program Files\ssystem\ssystem.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2872

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:2840

C:\Windows\system32\taskeng.exe
taskeng.exe {6878934F-F90E-4F16-B5F0-A424159D67CE} S-1-5-21-312935884-697965778-3955649944-1000:MXQFNXLT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2720
- C:\Program Files\ssystem\ssystem.exe
  "C:\Program Files\ssystem\ssystem.exe"
  2⤵
  - Executes dropped EXE
  PID:2616

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\ssystem\ssystem.exe

Filesize
3.1MB

MD5
e9bf15e3bb0040201e71a08b6148c4c8

SHA1
77f60f9328596ada8d2b7fd0fd03914004726f59

SHA256
1e53ce1e620a5ae7be3186252e8c5a1e9c81d5b4c862321102c8036c0d942791

SHA512
cbd2fc46d6df126434e8dd25503122ee172a99a37efefec129da9d7c9bdfc5f705a19e218e746a54d08ad28196a9ec471030039fcb88ca09392af66b42ee5d1f

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe

Filesize
21KB

MD5
a80be96476032d2eaa901d180fe9fb73

SHA1
f378d0bc5fefb9ea0b5006f020091ffcbcd7acec

SHA256
d6075c1ed6f285f5de01ce0cc6a817b59054da8b19f20bc7081cfe7fb2b1af42

SHA512
210c0c4c845b416a601015fba5ccd2a3e8a4b81d3b4c5e0491b07bd0dcad938d9b118728bb1abc21eb73c5f9263a3c08e1822ece91002a2d1f0983857f0192ea

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
memory/1272-1-0x0000000000DC0000-0x00000000010D4000-memory.dmp

Filesize
3.1MB

Download
memory/1272-2-0x0000000000520000-0x000000000057C000-memory.dmp

Filesize
368KB

Download
memory/1272-3-0x0000000000240000-0x000000000024E000-memory.dmp

Filesize
56KB

Download
memory/1272-4-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1272-5-0x0000000000480000-0x0000000000492000-memory.dmp

Filesize
72KB

Download
memory/1272-6-0x0000000000470000-0x0000000000478000-memory.dmp

Filesize
32KB

Download
memory/1272-31-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1272-0-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

Filesize
4KB

Download
memory/1712-17-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1712-21-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1712-18-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1712-16-0x0000000001350000-0x000000000135C000-memory.dmp

Filesize
48KB

Download
memory/2872-32-0x00000000012C0000-0x00000000015D4000-memory.dmp

Filesize
3.1MB

Download
memory/2872-33-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2872-34-0x000000001ADD0000-0x000000001AE28000-memory.dmp

Filesize
352KB

Download
memory/2872-35-0x0000000000A50000-0x0000000000A68000-memory.dmp

Filesize
96KB

Download
memory/2872-36-0x0000000000A70000-0x0000000000A80000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads