orcus | 3cb4efecf87208f429ab7186fb10d10998f3534cfec8e277019b6fff53caa7ef

Analysis

max time kernel
44s
max time network
46s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
01/01/2023, 15:07

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

csrss.exe
Size

915KB
MD5

9edc8a7beb5cd20a12f306308d9bcc77
SHA1

66904d048fa464f0ba3443a582f0a909c3cff140
SHA256

3cb4efecf87208f429ab7186fb10d10998f3534cfec8e277019b6fff53caa7ef
SHA512

55087802c715a3320b99608aa67cb79fe6c5ec3ff3a6f7e21261020575bc98d2b555da9908fd282d77bbf8df635fa1ce7133600e2cc86a5bc855f137679e3675
SSDEEP

24576:vUU4MROxnFD3KrXYf1rrcI0AilFEvxHPVooH:viMiJHrrcI0AilFEvxHP

Score

10^/10

orcus cc rat spyware stealer

Malware Config

Extracted

Family

orcus

Botnet

127.0.0.1:10134

Mutex

8e9cad03731d44e4aea90236e8356123

Attributes

autostart_method
TaskScheduler
enable_keylogger
true
install_path
%programfiles%\Orcus\Orcus.exe
reconnect_delay
10000
registry_keyname
Orcus
taskscheduler_taskname
csrss
watchdog_path
Temp\csrss.exe

Signatures

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

Orcus main payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0006000000022e5b-148.dat	family_orcus
behavioral1/files/0x0006000000022e5b-150.dat	family_orcus

Orcurs Rat Executable 3 IoCs

resource	yara_rule
behavioral1/memory/3804-132-0x0000000000620000-0x000000000070C000-memory.dmp	orcus
behavioral1/files/0x0006000000022e5b-148.dat	orcus
behavioral1/files/0x0006000000022e5b-150.dat	orcus

Executes dropped EXE 5 IoCs

pid	Process
1724	WindowsInput.exe
4300	WindowsInput.exe
392	Orcus.exe
1320	csrss.exe
892	csrss.exe

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	csrss.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	Orcus.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	csrss.exe

Drops file in System32 directory 3 IoCs

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

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Orcus\Orcus.exe	csrss.exe
File created	C:\Program Files (x86)\Orcus\Orcus.exe.config	csrss.exe
File created	C:\Program Files (x86)\Orcus\Orcus.exe	csrss.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
392	Orcus.exe
392	Orcus.exe
392	Orcus.exe
892	csrss.exe
892	csrss.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe
392	Orcus.exe
892	csrss.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	392	Orcus.exe
Token: SeDebugPrivilege	1320	csrss.exe
Token: SeDebugPrivilege	892	csrss.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
392	Orcus.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
392	Orcus.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
392	Orcus.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3804 wrote to memory of 1724	3804	csrss.exe	83
PID 3804 wrote to memory of 1724	3804	csrss.exe	83
PID 3804 wrote to memory of 392	3804	csrss.exe	88
PID 3804 wrote to memory of 392	3804	csrss.exe	88
PID 3804 wrote to memory of 392	3804	csrss.exe	88
PID 392 wrote to memory of 1320	392	Orcus.exe	90
PID 392 wrote to memory of 1320	392	Orcus.exe	90
PID 392 wrote to memory of 1320	392	Orcus.exe	90
PID 1320 wrote to memory of 892	1320	csrss.exe	91
PID 1320 wrote to memory of 892	1320	csrss.exe	91
PID 1320 wrote to memory of 892	1320	csrss.exe	91

C:\Users\Admin\AppData\Local\Temp\csrss.exe
"C:\Users\Admin\AppData\Local\Temp\csrss.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:1724
- C:\Program Files (x86)\Orcus\Orcus.exe
  "C:\Program Files (x86)\Orcus\Orcus.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:392
- - C:\Users\Admin\AppData\Local\Temp\csrss.exe
    "C:\Users\Admin\AppData\Local\Temp\csrss.exe" /launchSelfAndExit "C:\Program Files (x86)\Orcus\Orcus.exe" 392 /protectFile
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1320
  - - C:\Users\Admin\AppData\Local\Temp\csrss.exe
      "C:\Users\Admin\AppData\Local\Temp\csrss.exe" /watchProcess "C:\Program Files (x86)\Orcus\Orcus.exe" 392 "/protectFile"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:892

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:4300

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1548

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\Orcus\Orcus.exe

Filesize
915KB

MD5
9edc8a7beb5cd20a12f306308d9bcc77

SHA1
66904d048fa464f0ba3443a582f0a909c3cff140

SHA256
3cb4efecf87208f429ab7186fb10d10998f3534cfec8e277019b6fff53caa7ef

SHA512
55087802c715a3320b99608aa67cb79fe6c5ec3ff3a6f7e21261020575bc98d2b555da9908fd282d77bbf8df635fa1ce7133600e2cc86a5bc855f137679e3675

Download Submit
C:\Program Files (x86)\Orcus\Orcus.exe

Filesize
915KB

MD5
9edc8a7beb5cd20a12f306308d9bcc77

SHA1
66904d048fa464f0ba3443a582f0a909c3cff140

SHA256
3cb4efecf87208f429ab7186fb10d10998f3534cfec8e277019b6fff53caa7ef

SHA512
55087802c715a3320b99608aa67cb79fe6c5ec3ff3a6f7e21261020575bc98d2b555da9908fd282d77bbf8df635fa1ce7133600e2cc86a5bc855f137679e3675

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

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

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

Filesize
1KB

MD5
39d09ff12a2fa759b0fce7ff45568155

SHA1
622f0a09b9e5f4eaddcbce6a2ceabf879b345f2a

SHA256
d57b2af600e600c6aa188f1d487bc0dac36b37597764b1a10ef4577338da9350

SHA512
0cadde913f69dc33ecad762bd09dfbc434ad7e9c1d2d6ed65ddcb7c63e78bb8e0ae0274feebd995d36b2db9894dd7ac5b59009041b7d261182014ba3692c160c

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss.exe

Filesize
9KB

MD5
913967b216326e36a08010fb70f9dba3

SHA1
7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

SHA256
8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

SHA512
c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss.exe

Filesize
9KB

MD5
913967b216326e36a08010fb70f9dba3

SHA1
7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

SHA256
8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

SHA512
c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss.exe

Filesize
9KB

MD5
913967b216326e36a08010fb70f9dba3

SHA1
7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

SHA256
8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

SHA512
c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

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

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

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

Filesize
21KB

MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

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

Filesize
21KB

MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

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

Filesize
21KB

MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

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

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
memory/392-152-0x0000000006270000-0x000000000627A000-memory.dmp

Filesize
40KB

Download
memory/392-151-0x0000000005F40000-0x0000000006102000-memory.dmp

Filesize
1.8MB

Download
memory/1320-158-0x00000000009A0000-0x00000000009A8000-memory.dmp

Filesize
32KB

Download
memory/1724-142-0x0000000002E00000-0x0000000002E3C000-memory.dmp

Filesize
240KB

Download
memory/1724-143-0x00007FF9C1580000-0x00007FF9C2041000-memory.dmp

Filesize
10.8MB

Download
memory/1724-141-0x0000000002D70000-0x0000000002D82000-memory.dmp

Filesize
72KB

Download
memory/1724-140-0x0000000000D60000-0x0000000000D6C000-memory.dmp

Filesize
48KB

Download
memory/3804-132-0x0000000000620000-0x000000000070C000-memory.dmp

Filesize
944KB

Download
memory/3804-135-0x0000000005D30000-0x0000000005D52000-memory.dmp

Filesize
136KB

Download
memory/3804-134-0x00000000058D0000-0x0000000005962000-memory.dmp

Filesize
584KB

Download
memory/3804-133-0x0000000005DB0000-0x0000000006354000-memory.dmp

Filesize
5.6MB

Download
memory/4300-146-0x000000001C150000-0x000000001C25A000-memory.dmp

Filesize
1.0MB

Download
memory/4300-145-0x00007FF9C1230000-0x00007FF9C1CF1000-memory.dmp

Filesize
10.8MB

Download
memory/4300-161-0x00007FF9C1230000-0x00007FF9C1CF1000-memory.dmp

Filesize
10.8MB

Download