asyncrat | ad64049857fbcf458c46be6d1488b6ec65376910d77ecd912102673dc5edb748

Reason

Machine shutdown

General

Target

VENOMPACKED_OBF.exe
Size

486KB
MD5

efde0a539e86e9b931635f8d28b38bd4
SHA1

1630cee4919166f795c7d2f61ef9a26fd0e870e4
SHA256

ad64049857fbcf458c46be6d1488b6ec65376910d77ecd912102673dc5edb748
SHA512

76a184315f26eb2ed428cdfe30bbbbdbd7318a4bb9d436dde4b4d456fbaa16aa4436dab0bf01bc67c697e8aab8d7c9b0bf96499a04f518bc31a8e2737b1369fe
SSDEEP

12288:If38f8RukKmLAlTqE4FEMUYYrjmU7EFy+qGGys/4s7btyHND8Dz5UYgBK:ihD+97EHVHRqDGh

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

147.185.221.21:46268

Mutex

daizrkneoi

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/memory/4536-2-0x00000000015B0000-0x00000000015C8000-memory.dmp	family_asyncrat

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	VENOMPACKED_OBF.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "126"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4536	VENOMPACKED_OBF.exe
4536	VENOMPACKED_OBF.exe
4536	VENOMPACKED_OBF.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4536	VENOMPACKED_OBF.exe
Token: SeShutdownPrivilege	3396	shutdown.exe
Token: SeRemoteShutdownPrivilege	3396	shutdown.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4536	VENOMPACKED_OBF.exe
3820	LogonUI.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4536 wrote to memory of 1440	4536	VENOMPACKED_OBF.exe	94
PID 4536 wrote to memory of 1440	4536	VENOMPACKED_OBF.exe	94
PID 1440 wrote to memory of 3396	1440	cmd.exe	96
PID 1440 wrote to memory of 3396	1440	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\VENOMPACKED_OBF.exe
"C:\Users\Admin\AppData\Local\Temp\VENOMPACKED_OBF.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c Shutdown /r /f /t 00
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1440
- - C:\Windows\system32\shutdown.exe
    Shutdown /r /f /t 00
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3396

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa39bd855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:3820

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4536-0-0x00007FFAA9D23000-0x00007FFAA9D25000-memory.dmp

Filesize
8KB

Download
memory/4536-1-0x0000000000D90000-0x0000000000E10000-memory.dmp

Filesize
512KB

Download
memory/4536-2-0x00000000015B0000-0x00000000015C8000-memory.dmp

Filesize
96KB

Download
memory/4536-4-0x00007FFAA9D20000-0x00007FFAAA7E1000-memory.dmp

Filesize
10.8MB

Download
memory/4536-5-0x00007FFAA9D20000-0x00007FFAAA7E1000-memory.dmp

Filesize
10.8MB

Download
memory/4536-8-0x00007FFAA9D20000-0x00007FFAAA7E1000-memory.dmp

Filesize
10.8MB

Download
memory/4536-9-0x00007FFAA9D20000-0x00007FFAAA7E1000-memory.dmp

Filesize
10.8MB

Download
memory/4536-11-0x00007FFAA9D20000-0x00007FFAAA7E1000-memory.dmp

Filesize
10.8MB

Download
memory/4536-12-0x000000001CD50000-0x000000001CDC6000-memory.dmp

Filesize
472KB

Download
memory/4536-13-0x000000001CCD0000-0x000000001CD36000-memory.dmp

Filesize
408KB

Download
memory/4536-14-0x000000001BB10000-0x000000001BB2E000-memory.dmp

Filesize
120KB

Download
memory/4536-15-0x00007FFAA9D23000-0x00007FFAA9D25000-memory.dmp

Filesize
8KB

Download
memory/4536-16-0x00007FFAA9D20000-0x00007FFAAA7E1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

Errors