orcus | 30257f7538c093488cec42025711a59a5d7b9c4a6471bd22e2bedb24e26ba9ba

Analysis

max time kernel
154s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
21-03-2023 14:41

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General

Target

f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe
Size

916KB
MD5

1531ddf6b03ab9f7b0c46381210d82ca
SHA1

53f1566838a6e380e6f83e256ab7aac1e028f39f
SHA256

f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e
SHA512

4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e
SSDEEP

24576:ZVWC4MROxnFD3kw8XlrrcI0AilFEvxHPMrooG:ZqMiJorrcI0AilFEvxHP

Score

10^/10

orcus rat spyware stealer

Malware Config

Extracted

Family

orcus

84.21.172.55:1339

Mutex

5e29a9dc07244cd5b38b6e685c293580

Attributes

autostart_method
TaskScheduler
enable_keylogger
false
install_path
%programfiles%\Chrome\ChromeUpdateService.exe
reconnect_delay
10000
registry_keyname
Orcus
taskscheduler_taskname
SmarterScreen
watchdog_path
AppData\WindowsToolKit.exe

Signatures

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

Orcus main payload 4 IoCs

Processes:

resource	yara_rule
C:\Program Files (x86)\Chrome\ChromeUpdateService.exe	family_orcus
C:\Program Files (x86)\Chrome\ChromeUpdateService.exe	family_orcus
C:\Program Files (x86)\Chrome\ChromeUpdateService.exe	family_orcus
C:\Program Files (x86)\Chrome\ChromeUpdateService.exe	family_orcus

Orcurs Rat Executable 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1816-133-0x0000000000740000-0x000000000082A000-memory.dmp	orcus
C:\Program Files (x86)\Chrome\ChromeUpdateService.exe	orcus
C:\Program Files (x86)\Chrome\ChromeUpdateService.exe	orcus
C:\Program Files (x86)\Chrome\ChromeUpdateService.exe	orcus
C:\Program Files (x86)\Chrome\ChromeUpdateService.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:

f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exeChromeUpdateService.exeWindowsToolKit.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	ChromeUpdateService.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	WindowsToolKit.exe

Executes dropped EXE 6 IoCs

Processes:

WindowsInput.exeWindowsInput.exeChromeUpdateService.exeChromeUpdateService.exeWindowsToolKit.exeWindowsToolKit.exe

pid process

4928 WindowsInput.exe
2332 WindowsInput.exe
1332 ChromeUpdateService.exe
1920 ChromeUpdateService.exe
1764 WindowsToolKit.exe
3880 WindowsToolKit.exe

pid	process
4928	WindowsInput.exe
2332	WindowsInput.exe
1332	ChromeUpdateService.exe
1920	ChromeUpdateService.exe
1764	WindowsToolKit.exe
3880	WindowsToolKit.exe

Drops file in System32 directory 3 IoCs

Processes:

f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exeWindowsInput.exe

description	ioc	process
File created	C:\Windows\SysWOW64\WindowsInput.exe	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe.config	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe
File created	C:\Windows\SysWOW64\WindowsInput.InstallState	WindowsInput.exe

Drops file in Program Files directory 3 IoCs

Processes:

f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe

description	ioc	process
File created	C:\Program Files (x86)\Chrome\ChromeUpdateService.exe	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe
File opened for modification	C:\Program Files (x86)\Chrome\ChromeUpdateService.exe	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe
File created	C:\Program Files (x86)\Chrome\ChromeUpdateService.exe.config	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.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

Processes:

WindowsToolKit.exeChromeUpdateService.exe

pid	process
3880	WindowsToolKit.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe
3880	WindowsToolKit.exe
1332	ChromeUpdateService.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

ChromeUpdateService.exeWindowsToolKit.exeWindowsToolKit.exe

description	pid	process
Token: SeDebugPrivilege	1332	ChromeUpdateService.exe
Token: SeDebugPrivilege	1764	WindowsToolKit.exe
Token: SeDebugPrivilege	3880	WindowsToolKit.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exeChromeUpdateService.exeWindowsToolKit.exe

description	pid	process	target process
PID 1816 wrote to memory of 4928	1816	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe	WindowsInput.exe
PID 1816 wrote to memory of 4928	1816	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe	WindowsInput.exe
PID 1816 wrote to memory of 1332	1816	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe	ChromeUpdateService.exe
PID 1816 wrote to memory of 1332	1816	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe	ChromeUpdateService.exe
PID 1816 wrote to memory of 1332	1816	f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe	ChromeUpdateService.exe
PID 1332 wrote to memory of 1764	1332	ChromeUpdateService.exe	WindowsToolKit.exe
PID 1332 wrote to memory of 1764	1332	ChromeUpdateService.exe	WindowsToolKit.exe
PID 1332 wrote to memory of 1764	1332	ChromeUpdateService.exe	WindowsToolKit.exe
PID 1764 wrote to memory of 3880	1764	WindowsToolKit.exe	WindowsToolKit.exe
PID 1764 wrote to memory of 3880	1764	WindowsToolKit.exe	WindowsToolKit.exe
PID 1764 wrote to memory of 3880	1764	WindowsToolKit.exe	WindowsToolKit.exe

C:\Users\Admin\AppData\Local\Temp\f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe
"C:\Users\Admin\AppData\Local\Temp\f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1816

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe" --install
2⤵
- Executes dropped EXE
- Drops file in System32 directory
PID:4928

C:\Program Files (x86)\Chrome\ChromeUpdateService.exe
"C:\Program Files (x86)\Chrome\ChromeUpdateService.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1332

C:\Users\Admin\AppData\Roaming\WindowsToolKit.exe
"C:\Users\Admin\AppData\Roaming\WindowsToolKit.exe" /launchSelfAndExit "C:\Program Files (x86)\Chrome\ChromeUpdateService.exe" 1332
3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1764

C:\Users\Admin\AppData\Roaming\WindowsToolKit.exe
"C:\Users\Admin\AppData\Roaming\WindowsToolKit.exe" /watchProcess "C:\Program Files (x86)\Chrome\ChromeUpdateService.exe" 1332
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3880

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:2332

C:\Program Files (x86)\Chrome\ChromeUpdateService.exe
"C:\Program Files (x86)\Chrome\ChromeUpdateService.exe"
1⤵
- Executes dropped EXE
PID:1920

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

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Downloads

C:\Program Files (x86)\Chrome\ChromeUpdateService.exe

Filesize
916KB

MD5
1531ddf6b03ab9f7b0c46381210d82ca

SHA1
53f1566838a6e380e6f83e256ab7aac1e028f39f

SHA256
f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e

SHA512
4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e

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

Filesize
916KB

MD5
1531ddf6b03ab9f7b0c46381210d82ca

SHA1
53f1566838a6e380e6f83e256ab7aac1e028f39f

SHA256
f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e

SHA512
4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e

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

Filesize
916KB

MD5
1531ddf6b03ab9f7b0c46381210d82ca

SHA1
53f1566838a6e380e6f83e256ab7aac1e028f39f

SHA256
f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e

SHA512
4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e

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

Filesize
916KB

MD5
1531ddf6b03ab9f7b0c46381210d82ca

SHA1
53f1566838a6e380e6f83e256ab7aac1e028f39f

SHA256
f5ec9c818e5d515558f479915c1de23c803c55637825c6e8199760180bab866e

SHA512
4ea19ccdccfc6532f9a71731df3766cc785d44e8cfabccb624cd99aae14efcb0c2925c9143b699fc6bc7f036c74d41ee476f56df247004a871d006d5e9f5d51e

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

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

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

Filesize
9KB

MD5
913967b216326e36a08010fb70f9dba3

SHA1
7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

SHA256
8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

SHA512
c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

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

Filesize
9KB

MD5
913967b216326e36a08010fb70f9dba3

SHA1
7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

SHA256
8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

SHA512
c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

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

Filesize
9KB

MD5
913967b216326e36a08010fb70f9dba3

SHA1
7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

SHA256
8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

SHA512
c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

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

Filesize
9KB

MD5
913967b216326e36a08010fb70f9dba3

SHA1
7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

SHA256
8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

SHA512
c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

Download Submit
C:\Users\Admin\AppData\Roaming\WindowsToolKit.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

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/1332-195-0x00000000060C0000-0x0000000006126000-memory.dmp

Filesize
408KB

Download
memory/1332-201-0x00000000071C0000-0x00000000077D8000-memory.dmp

Filesize
6.1MB

Download
memory/1332-207-0x00000000077E0000-0x00000000079A2000-memory.dmp

Filesize
1.8MB

Download
memory/1332-206-0x00000000049C0000-0x00000000049D0000-memory.dmp

Filesize
64KB

Download
memory/1332-205-0x00000000049C0000-0x00000000049D0000-memory.dmp

Filesize
64KB

Download
memory/1332-204-0x0000000006DD0000-0x0000000006EDA000-memory.dmp

Filesize
1.0MB

Download
memory/1332-203-0x0000000006C30000-0x0000000006C6C000-memory.dmp

Filesize
240KB

Download
memory/1332-178-0x00000000049C0000-0x00000000049D0000-memory.dmp

Filesize
64KB

Download
memory/1332-179-0x0000000005EF0000-0x0000000005EFA000-memory.dmp

Filesize
40KB

Download
memory/1332-202-0x0000000006BD0000-0x0000000006BE2000-memory.dmp

Filesize
72KB

Download
memory/1332-200-0x00000000049C0000-0x00000000049D0000-memory.dmp

Filesize
64KB

Download
memory/1764-193-0x0000000000BB0000-0x0000000000BB8000-memory.dmp

Filesize
32KB

Download
memory/1816-138-0x00000000053D0000-0x00000000053E0000-memory.dmp

Filesize
64KB

Download
memory/1816-135-0x0000000005990000-0x0000000005F34000-memory.dmp

Filesize
5.6MB

Download
memory/1816-134-0x00000000053D0000-0x00000000053E0000-memory.dmp

Filesize
64KB

Download
memory/1816-133-0x0000000000740000-0x000000000082A000-memory.dmp

Filesize
936KB

Download
memory/1816-136-0x0000000005300000-0x0000000005392000-memory.dmp

Filesize
584KB

Download
memory/1816-137-0x0000000005860000-0x0000000005882000-memory.dmp

Filesize
136KB

Download
memory/1920-197-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/2332-161-0x000000001C700000-0x000000001C80A000-memory.dmp

Filesize
1.0MB

Download
memory/2332-199-0x000000001B930000-0x000000001B940000-memory.dmp

Filesize
64KB

Download
memory/2332-160-0x000000001B930000-0x000000001B940000-memory.dmp

Filesize
64KB

Download
memory/4928-152-0x0000000000680000-0x000000000068C000-memory.dmp

Filesize
48KB

Download
memory/4928-153-0x00000000026C0000-0x00000000026D0000-memory.dmp

Filesize
64KB

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memory/4928-154-0x00000000026D0000-0x00000000026E2000-memory.dmp

Filesize
72KB

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memory/4928-155-0x0000000002770000-0x00000000027AC000-memory.dmp

Filesize
240KB

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