orcus | 64348ec4267b52c1a7f639ccfaf9478b6d5159f796176076650901e5b7c0e1df

General

Target

tumblr-main/svc.exe
Size

3.0MB
MD5

7a461d8d06c7859b09524ceb0f3d7e4a
SHA1

aa27353c3883ef1ce5728dd0112e79fec7ee2fa6
SHA256

7a080f9390658ba441e845e04644e6e05ef865fdf986e8a2bfeb57dd1e4b7dee
SHA512

22d4fe1a52d16bc45ed5d8cedb8fd98149bb236f2b23f39b37fcd59652e165198180aa7e4a9e2952229a10d9613747485a6891f94ef9019557af39da676aadea
SSDEEP

49152:4i9R1/op1fAZeM9/NtRaO5NYAxC48VYrJAypQxbn32o9JnCmxJWncFfSIH4Duis:4EMtQR9TYW8V0OypSbGo9JCmx

Score

10^/10

orcus discovery persistence rat spyware stealer

Malware Config

Extracted

Family

orcus

C2

45.10.151.182:10134

Mutex

064acb3fed56475eaee5e20cdd2d83c3

Attributes

autostart_method
Registry
enable_keylogger
true
install_path
%programfiles%\Orcus\svchost.exe
reconnect_delay
10000
registry_keyname
svchost
taskscheduler_taskname
svchost
watchdog_path
AppData\csrss.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 2 IoCs

Processes:

resource	yara_rule
behavioral3/memory/3804-1-0x000002AA0E070000-0x000002AA0E36C000-memory.dmp	orcus
C:\Program Files\Orcus\svchost.exe	orcus

Checks computer location settings 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

csrss.exesvc.exesvchost.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	csrss.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	svc.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 5 IoCs

Processes:

WindowsInput.exeWindowsInput.exesvchost.execsrss.execsrss.exe

pid process

4804 WindowsInput.exe
1644 WindowsInput.exe
1216 svchost.exe
3856 csrss.exe
3264 csrss.exe

pid	process
4804	WindowsInput.exe
1644	WindowsInput.exe
1216	svchost.exe
3856	csrss.exe
3264	csrss.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "\"C:\\Program Files\\Orcus\\svchost.exe\""	svchost.exe

Drops file in System32 directory 3 IoCs

Processes:

svc.exeWindowsInput.exe

description	ioc	process
File created	C:\Windows\SysWOW64\WindowsInput.exe	svc.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe.config	svc.exe
File created	C:\Windows\SysWOW64\WindowsInput.InstallState	WindowsInput.exe

Drops file in Program Files directory 3 IoCs

Processes:

svc.exe

description	ioc	process
File opened for modification	C:\Program Files\Orcus\svchost.exe	svc.exe
File created	C:\Program Files\Orcus\svchost.exe	svc.exe
File created	C:\Program Files\Orcus\svchost.exe.config	svc.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

Processes:

csrss.execsrss.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

svchost.execsrss.exe

pid	process
1216	svchost.exe
1216	svchost.exe
3264	csrss.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
3264	csrss.exe
1216	svchost.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
3264	csrss.exe
1216	svchost.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
3264	csrss.exe
1216	svchost.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
3264	csrss.exe
1216	svchost.exe
1216	svchost.exe
3264	csrss.exe
3264	csrss.exe
1216	svchost.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
3264	csrss.exe
1216	svchost.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe
1216	svchost.exe
3264	csrss.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

svchost.execsrss.execsrss.exe

description pid process

Token: SeDebugPrivilege 1216 svchost.exe
Token: SeDebugPrivilege 3856 csrss.exe
Token: SeDebugPrivilege 3264 csrss.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

svchost.exe

pid process

1216 svchost.exe

description	pid	process
Token: SeDebugPrivilege	1216	svchost.exe
Token: SeDebugPrivilege	3856	csrss.exe
Token: SeDebugPrivilege	3264	csrss.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

svc.exesvchost.execsrss.exe

description	pid	process	target process
PID 3804 wrote to memory of 4804	3804	svc.exe	WindowsInput.exe
PID 3804 wrote to memory of 4804	3804	svc.exe	WindowsInput.exe
PID 3804 wrote to memory of 1216	3804	svc.exe	svchost.exe
PID 3804 wrote to memory of 1216	3804	svc.exe	svchost.exe
PID 1216 wrote to memory of 3856	1216	svchost.exe	csrss.exe
PID 1216 wrote to memory of 3856	1216	svchost.exe	csrss.exe
PID 1216 wrote to memory of 3856	1216	svchost.exe	csrss.exe
PID 3856 wrote to memory of 3264	3856	csrss.exe	csrss.exe
PID 3856 wrote to memory of 3264	3856	csrss.exe	csrss.exe
PID 3856 wrote to memory of 3264	3856	csrss.exe	csrss.exe

C:\Users\Admin\AppData\Local\Temp\tumblr-main\svc.exe
"C:\Users\Admin\AppData\Local\Temp\tumblr-main\svc.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3804
- C:\Windows\SysWOW64\WindowsInput.exe
  "C:\Windows\SysWOW64\WindowsInput.exe" --install
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:4804
- C:\Program Files\Orcus\svchost.exe
  "C:\Program Files\Orcus\svchost.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1216
- - C:\Users\Admin\AppData\Roaming\csrss.exe
    "C:\Users\Admin\AppData\Roaming\csrss.exe" /launchSelfAndExit "C:\Program Files\Orcus\svchost.exe" 1216 /protectFile
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3856
  - - C:\Users\Admin\AppData\Roaming\csrss.exe
      "C:\Users\Admin\AppData\Roaming\csrss.exe" /watchProcess "C:\Program Files\Orcus\svchost.exe" 1216 "/protectFile"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3264

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:1644

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

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:\Program Files\Orcus\svchost.exe

Filesize
3.0MB

MD5
7a461d8d06c7859b09524ceb0f3d7e4a

SHA1
aa27353c3883ef1ce5728dd0112e79fec7ee2fa6

SHA256
7a080f9390658ba441e845e04644e6e05ef865fdf986e8a2bfeb57dd1e4b7dee

SHA512
22d4fe1a52d16bc45ed5d8cedb8fd98149bb236f2b23f39b37fcd59652e165198180aa7e4a9e2952229a10d9613747485a6891f94ef9019557af39da676aadea

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\csrss.exe.log

Filesize
425B

MD5
8c7889bde41724ce3db7c67e730677f6

SHA1
485891cc9120cb2203a2483754dbd5e6ea24f28e

SHA256
83c70bfcb1b41892c9c50cabe9bc2d96b2f7420b28545afabd32f682ac62d0ad

SHA512
b7c3aab27fc924dcaef78987b492931e164b9e30b813c532fe87e1d40001ed1861c4b5ddbdd85cd2278681a22e32eee816877f4f63cecaa9972976d87e38f5cc

Download Submit
C:\Users\Admin\AppData\Roaming\csrss.exe

Filesize
9KB

MD5
484af5d2607d4c70ed4e0a350eeeee45

SHA1
1aa920ad742516f41b3722b4524acf38be5dfd57

SHA256
0f7f639c1efbff416a8ad19d6563e0bc719d789cd6aaa9b4ea050f559c8886d8

SHA512
f12f1bbe67194420a577e8123bb75b91c4d117245eed81ef78e65c2de6633bd5d3feea128be3d556d506cbd10ccd9e35c8ccca09a397207518c63cb4e2464faa

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

Filesize
157B

MD5
7efa291047eb1202fde7765adac4b00d

SHA1
22d4846caff5e45c18e50738360579fbbed2aa8d

SHA256
807fb6eeaa7c77bf53831d8a4422a53a5d8ccd90e6bbc17c655c0817460407b6

SHA512
159c95eb1e817ba2d281f39c3939dd963ab62c0cd29bf66ca3beb0aff53f4617d47f48474e58319130ae4146a044a42fc75f63c343330c1b6d2be7034b9fa724

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

Filesize
21KB

MD5
785adb93e8dd006421c1ba3e81663d72

SHA1
0ea67d6d82b03c51a22e01de33476c70f70f8fbc

SHA256
cb29a7aba6161d96b66c9a1cdb92e293109ed7c171906fdb52d73c4226a09c74

SHA512
86dbcf36114a99228f5720c3835af24765c8c7f059ad207dfb89f3923552f9485991a41e3874c138a5fd9a1ee3ae722329380660bd92666b8ebbc68ec49baf2c

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

Filesize
349B

MD5
89817519e9e0b4e703f07e8c55247861

SHA1
4636de1f6c997a25c3190f73f46a3fd056238d78

SHA256
f40dfaa50dcbff93611d45607009158f798e9cd845170939b1d6088a7d10ee13

SHA512
b017cb7a522b9c6794f3691cb7266ec82f565a90d7d07cc9beb53b939d2e9bf34275bc25f6f32d9a9c7136a0aab2189d9556af7244450c610d11ed7a4f584ba3

Download Submit
memory/1216-39-0x0000021CB6F60000-0x0000021CB6F78000-memory.dmp

Filesize
96KB

Download
memory/1216-40-0x0000021CB85D0000-0x0000021CB8792000-memory.dmp

Filesize
1.8MB

Download
memory/1216-41-0x0000021CB6FA0000-0x0000021CB6FB0000-memory.dmp

Filesize
64KB

Download
memory/1216-38-0x0000021CB6F00000-0x0000021CB6F58000-memory.dmp

Filesize
352KB

Download
memory/1644-32-0x000002BC60C20000-0x000002BC60D2A000-memory.dmp

Filesize
1.0MB

Download
memory/3804-4-0x00007FFA4E540000-0x00007FFA4F002000-memory.dmp

Filesize
10.8MB

Download
memory/3804-0-0x00007FFA4E543000-0x00007FFA4E545000-memory.dmp

Filesize
8KB

Download
memory/3804-1-0x000002AA0E070000-0x000002AA0E36C000-memory.dmp

Filesize
3.0MB

Download
memory/3804-3-0x000002AA10040000-0x000002AA1004E000-memory.dmp

Filesize
56KB

Download
memory/3804-5-0x000002AA28850000-0x000002AA28862000-memory.dmp

Filesize
72KB

Download
memory/3804-37-0x00007FFA4E540000-0x00007FFA4F002000-memory.dmp

Filesize
10.8MB

Download
memory/3804-2-0x000002AA288B0000-0x000002AA2890C000-memory.dmp

Filesize
368KB

Download
memory/3856-58-0x0000000000FB0000-0x0000000000FB8000-memory.dmp

Filesize
32KB

Download
memory/4804-26-0x000001EE793E0000-0x000001EE7941C000-memory.dmp

Filesize
240KB

Download
memory/4804-23-0x00007FFA4E540000-0x00007FFA4F002000-memory.dmp

Filesize
10.8MB

Download
memory/4804-22-0x000001EE77660000-0x000001EE7766C000-memory.dmp

Filesize
48KB

Download
memory/4804-24-0x00007FFA4E540000-0x00007FFA4F002000-memory.dmp

Filesize
10.8MB

Download
memory/4804-25-0x000001EE77A40000-0x000001EE77A52000-memory.dmp

Filesize
72KB

Download
memory/4804-30-0x00007FFA4E540000-0x00007FFA4F002000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads