asyncrat | 9261f0bf10627dbe394d65266b9dd6d3150bbfdc83b279739a74f20979a4d4d7

Reason

Machine shutdown

General

Target

Client.exe
Size

63KB
MD5

37b8d84468f1ca2c57ed419be256476e
SHA1

8807c4d29a45acb69cd8851d07ed2eae3ef8a5a8
SHA256

9261f0bf10627dbe394d65266b9dd6d3150bbfdc83b279739a74f20979a4d4d7
SHA512

2fc7446fa7d9c3416c5818ba3eab72ed5d71ac2052a4227287531290bfa6c488da3674e9cca8584eea3fcfd67fc47094e231992eda6c9a9a67da5497d7e54a50
SSDEEP

1536:AhIBLTM3Ufc0cMdmeeiIVrGbbXwcwzWGGDpqKmY7:AhIBLTM3Ufc6d/eXGbbXkQgz

Score

10^/10

asyncrat venom clients rat

Malware Config

Extracted

Family

asyncrat

Version

5.0.5

Botnet

Venom Clients

C2

index-hon.gl.at.ply.gg:4610

Mutex

Venom_RAT_HVNC_Mutex_Venom RAT_HVNC

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
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:

Client.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation Client.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	Client.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	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\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	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\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	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\EnableWindowColorization = "95"	LogonUI.exe
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\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	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\ColorizationColorBalance = "89"	LogonUI.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Client.exeshutdown.exe

description pid process

Token: SeDebugPrivilege 4496 Client.exe
Token: SeShutdownPrivilege 2856 shutdown.exe
Token: SeRemoteShutdownPrivilege 2856 shutdown.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LogonUI.exe

pid process

964 LogonUI.exe

description	pid	process
Token: SeDebugPrivilege	4496	Client.exe
Token: SeShutdownPrivilege	2856	shutdown.exe
Token: SeRemoteShutdownPrivilege	2856	shutdown.exe

pid	process
964	LogonUI.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

Client.execmd.exe

description	pid	process	target process
PID 4496 wrote to memory of 1984	4496	Client.exe	cmd.exe
PID 4496 wrote to memory of 1984	4496	Client.exe	cmd.exe
PID 1984 wrote to memory of 2856	1984	cmd.exe	shutdown.exe
PID 1984 wrote to memory of 2856	1984	cmd.exe	shutdown.exe

C:\Users\Admin\AppData\Local\Temp\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4496
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c Shutdown /s /f /t 00
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1984
- - C:\Windows\system32\shutdown.exe
    Shutdown /s /f /t 00
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2856

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa390c855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:964

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4496-0-0x00007FFCFA423000-0x00007FFCFA425000-memory.dmp

Filesize
8KB

Download
memory/4496-1-0x0000000000980000-0x0000000000996000-memory.dmp

Filesize
88KB

Download
memory/4496-2-0x00007FFCFA420000-0x00007FFCFAEE1000-memory.dmp

Filesize
10.8MB

Download
memory/4496-3-0x00007FFCFA420000-0x00007FFCFAEE1000-memory.dmp

Filesize
10.8MB

Download
memory/4496-6-0x00007FFCFA423000-0x00007FFCFA425000-memory.dmp

Filesize
8KB

Download
memory/4496-7-0x00007FFCFA420000-0x00007FFCFAEE1000-memory.dmp

Filesize
10.8MB

Download
memory/4496-8-0x00007FFCFA420000-0x00007FFCFAEE1000-memory.dmp

Filesize
10.8MB

Download
memory/4496-9-0x000000001C4E0000-0x000000001C556000-memory.dmp

Filesize
472KB

Download
memory/4496-10-0x0000000002BA0000-0x0000000002BB0000-memory.dmp

Filesize
64KB

Download
memory/4496-11-0x000000001C480000-0x000000001C49E000-memory.dmp

Filesize
120KB

Download
memory/4496-12-0x00000000010D0000-0x0000000001134000-memory.dmp

Filesize
400KB

Download
memory/4496-13-0x00007FFCFA420000-0x00007FFCFAEE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

Errors