orcus | e7e7d51e82941b9eb56f82854e9682dc7a8593185ce6216082d5f795ceace582

Analysis

max time kernel
27s
max time network
143s
platform
windows10_x64
resource
win10v20210408
submitted
12-07-2021 15:12

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General

Target

52EE41A4329C6874DF19851AC928C8E8.exe
Size

899KB
MD5

52ee41a4329c6874df19851ac928c8e8
SHA1

ba47b57ff5b0c6d02ea5a1b80e96cee5387b03de
SHA256

e7e7d51e82941b9eb56f82854e9682dc7a8593185ce6216082d5f795ceace582
SHA512

6f640819de2f407337578e047df76aadc23f2062c0a798a47a05bd6407b924f286f71cb4ef1c00b568223ac8e5c05afa39261cdcf86e8e913ff0e23096c201ac

Score

10^/10

orcus rat spyware stealer

Malware Config

Extracted

Family

orcus

orcustop4ik.duckdns.org:6666

Mutex

9280ed1ca561486e8b0282e7c4fcd77c

Attributes

autostart_method
TaskScheduler
enable_keylogger
true
install_path
%appdata%\Windows Defender\UnzipManager.exe
reconnect_delay
10000
registry_keyname
Unzipper
taskscheduler_taskname
Unzipper
watchdog_path
AppData\WindowsServer\svhost.exe

Signatures

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

Orcus Main Payload 5 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\Desktop\WinRarUnzipper.exe	family_orcus
C:\Users\Admin\Desktop\WinRarUnzipper.exe	family_orcus
C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe	family_orcus
C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe	family_orcus
C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe	family_orcus

Orcurs Rat Executable 5 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\Desktop\WinRarUnzipper.exe	orcus
C:\Users\Admin\Desktop\WinRarUnzipper.exe	orcus
C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe	orcus
C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe	orcus
C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe	orcus

Executes dropped EXE 5 IoCs

Processes:

WinRarUnzipper.exeWindowsInput.exeWindowsInput.exeUnzipManager.exeUnzipManager.exe

pid process

2792 WinRarUnzipper.exe
2132 WindowsInput.exe
1676 WindowsInput.exe
3644 UnzipManager.exe
1588 UnzipManager.exe

pid	process
2792	WinRarUnzipper.exe
2132	WindowsInput.exe
1676	WindowsInput.exe
3644	UnzipManager.exe
1588	UnzipManager.exe

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

Processes:

52EE41A4329C6874DF19851AC928C8E8.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\International\Geo\Nation	52EE41A4329C6874DF19851AC928C8E8.exe

Drops file in System32 directory 3 IoCs

Processes:

WindowsInput.exeWinRarUnzipper.exe

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

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

52EE41A4329C6874DF19851AC928C8E8.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance	52EE41A4329C6874DF19851AC928C8E8.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

UnzipManager.exe

description pid process

Token: SeDebugPrivilege 3644 UnzipManager.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

UnzipManager.exe

pid process

3644 UnzipManager.exe

description	pid	process
Token: SeDebugPrivilege	3644	UnzipManager.exe

pid	process
3644	UnzipManager.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

52EE41A4329C6874DF19851AC928C8E8.exeWinRarUnzipper.exe

description	pid	process	target process
PID 3628 wrote to memory of 2792	3628	52EE41A4329C6874DF19851AC928C8E8.exe	WinRarUnzipper.exe
PID 3628 wrote to memory of 2792	3628	52EE41A4329C6874DF19851AC928C8E8.exe	WinRarUnzipper.exe
PID 3628 wrote to memory of 2792	3628	52EE41A4329C6874DF19851AC928C8E8.exe	WinRarUnzipper.exe
PID 2792 wrote to memory of 2132	2792	WinRarUnzipper.exe	WindowsInput.exe
PID 2792 wrote to memory of 2132	2792	WinRarUnzipper.exe	WindowsInput.exe
PID 2792 wrote to memory of 3644	2792	WinRarUnzipper.exe	UnzipManager.exe
PID 2792 wrote to memory of 3644	2792	WinRarUnzipper.exe	UnzipManager.exe
PID 2792 wrote to memory of 3644	2792	WinRarUnzipper.exe	UnzipManager.exe

C:\Users\Admin\AppData\Local\Temp\52EE41A4329C6874DF19851AC928C8E8.exe
"C:\Users\Admin\AppData\Local\Temp\52EE41A4329C6874DF19851AC928C8E8.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3628

C:\Users\Admin\Desktop\WinRarUnzipper.exe
"C:\Users\Admin\Desktop\WinRarUnzipper.exe"
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2792

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe" --install
3⤵
- Executes dropped EXE
- Drops file in System32 directory
PID:2132

C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe
"C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3644

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:1676

C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe
"C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe"
1⤵
- Executes dropped EXE
PID:1588

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe
MD5
f0075dada3792fe0bb97245bad765d29

SHA1
9b9c0f6e495672fc4ed7cde6964d51368ec7f50a

SHA256
91b06c753fe837ec3a54349da00ab6591693f4359178e60ca07b1b529aadc733

SHA512
c4eadd3c1de4db80a687b17f9a91b5f0095f16fc2523ece57945d81ebda1c7fbd23fc50520c4ba4e7d02e1f315bfc714a94b6f9b89dfab4b4e1c36112468f92f

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe
MD5
f0075dada3792fe0bb97245bad765d29

SHA1
9b9c0f6e495672fc4ed7cde6964d51368ec7f50a

SHA256
91b06c753fe837ec3a54349da00ab6591693f4359178e60ca07b1b529aadc733

SHA512
c4eadd3c1de4db80a687b17f9a91b5f0095f16fc2523ece57945d81ebda1c7fbd23fc50520c4ba4e7d02e1f315bfc714a94b6f9b89dfab4b4e1c36112468f92f

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe
MD5
f0075dada3792fe0bb97245bad765d29

SHA1
9b9c0f6e495672fc4ed7cde6964d51368ec7f50a

SHA256
91b06c753fe837ec3a54349da00ab6591693f4359178e60ca07b1b529aadc733

SHA512
c4eadd3c1de4db80a687b17f9a91b5f0095f16fc2523ece57945d81ebda1c7fbd23fc50520c4ba4e7d02e1f315bfc714a94b6f9b89dfab4b4e1c36112468f92f

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender\UnzipManager.exe.config
MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
C:\Users\Admin\Desktop\WinRarUnzipper.exe
MD5
f0075dada3792fe0bb97245bad765d29

SHA1
9b9c0f6e495672fc4ed7cde6964d51368ec7f50a

SHA256
91b06c753fe837ec3a54349da00ab6591693f4359178e60ca07b1b529aadc733

SHA512
c4eadd3c1de4db80a687b17f9a91b5f0095f16fc2523ece57945d81ebda1c7fbd23fc50520c4ba4e7d02e1f315bfc714a94b6f9b89dfab4b4e1c36112468f92f

Download Submit
C:\Users\Admin\Desktop\WinRarUnzipper.exe
MD5
f0075dada3792fe0bb97245bad765d29

SHA1
9b9c0f6e495672fc4ed7cde6964d51368ec7f50a

SHA256
91b06c753fe837ec3a54349da00ab6591693f4359178e60ca07b1b529aadc733

SHA512
c4eadd3c1de4db80a687b17f9a91b5f0095f16fc2523ece57945d81ebda1c7fbd23fc50520c4ba4e7d02e1f315bfc714a94b6f9b89dfab4b4e1c36112468f92f

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe
MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe
MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe
MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe.config
MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
memory/1588-174-0x0000000005420000-0x0000000005421000-memory.dmp

Filesize
4KB

Download
memory/1676-146-0x000000001A770000-0x000000001A771000-memory.dmp

Filesize
4KB

Download
memory/1676-145-0x0000000019AC0000-0x0000000019AC2000-memory.dmp

Filesize
8KB

Download
memory/2132-138-0x00000000013E0000-0x00000000013E1000-memory.dmp

Filesize
4KB

Download
memory/2132-137-0x0000000001380000-0x0000000001381000-memory.dmp

Filesize
4KB

Download
memory/2132-130-0x0000000000000000-mapping.dmp

Download
memory/2132-139-0x000000001B720000-0x000000001B722000-memory.dmp

Filesize
8KB

Download
memory/2132-134-0x0000000000B30000-0x0000000000B31000-memory.dmp

Filesize
4KB

Download
memory/2792-127-0x00000000053D0000-0x00000000053D1000-memory.dmp

Filesize
4KB

Download
memory/2792-121-0x0000000000800000-0x0000000000801000-memory.dmp

Filesize
4KB

Download
memory/2792-128-0x00000000057B0000-0x00000000057C0000-memory.dmp

Filesize
64KB

Download
memory/2792-129-0x0000000005DF0000-0x0000000005DF1000-memory.dmp

Filesize
4KB

Download
memory/2792-126-0x00000000057F0000-0x00000000057F1000-memory.dmp

Filesize
4KB

Download
memory/2792-125-0x0000000005230000-0x000000000528A000-memory.dmp

Filesize
360KB

Download
memory/2792-124-0x0000000001350000-0x000000000135C000-memory.dmp

Filesize
48KB

Download
memory/2792-118-0x0000000000000000-mapping.dmp

Download
memory/2792-123-0x00000000052C0000-0x00000000052C1000-memory.dmp

Filesize
4KB

Download
memory/3628-116-0x0000000002440000-0x0000000002506000-memory.dmp

Filesize
792KB

Download
memory/3628-117-0x000000001B050000-0x000000001B052000-memory.dmp

Filesize
8KB

Download
memory/3628-114-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/3644-166-0x0000000005F50000-0x0000000005F51000-memory.dmp

Filesize
4KB

Download
memory/3644-158-0x0000000005030000-0x0000000005078000-memory.dmp

Filesize
288KB

Download
memory/3644-162-0x0000000005730000-0x0000000005745000-memory.dmp

Filesize
84KB

Download
memory/3644-163-0x0000000004C20000-0x0000000004C21000-memory.dmp

Filesize
4KB

Download
memory/3644-164-0x0000000005AC0000-0x0000000005AC1000-memory.dmp

Filesize
4KB

Download
memory/3644-165-0x00000000058F0000-0x00000000058FC000-memory.dmp

Filesize
48KB

Download
memory/3644-147-0x0000000000000000-mapping.dmp

Download
memory/3644-159-0x00000000050C0000-0x00000000050C1000-memory.dmp

Filesize
4KB

Download
memory/3644-173-0x0000000004C23000-0x0000000004C25000-memory.dmp

Filesize
8KB

Download
memory/3644-175-0x0000000006220000-0x0000000006221000-memory.dmp

Filesize
4KB

Download
memory/3644-176-0x0000000006CC0000-0x0000000006CC1000-memory.dmp

Filesize
4KB

Download
memory/3644-177-0x00000000062F0000-0x00000000062F1000-memory.dmp

Filesize
4KB

Download
memory/3644-178-0x00000000066B0000-0x00000000066B1000-memory.dmp

Filesize
4KB

Download
memory/3644-179-0x0000000006310000-0x0000000006311000-memory.dmp

Filesize
4KB

Download
memory/3644-180-0x0000000006860000-0x0000000006861000-memory.dmp

Filesize
4KB

Download