asyncrat | 3ad68e54e9cf1664e631e14b47f4936aac8ac23052a4f086b4b68ffe89ad6e45

Reason

Machine shutdown

General

Target

RUNMEFIRST.exe
Size

45KB
MD5

57bb731ee010ad721bd93c9bc12ab589
SHA1

e9274bdf1b8493eda5acf671056efb98430c3cdb
SHA256

3ad68e54e9cf1664e631e14b47f4936aac8ac23052a4f086b4b68ffe89ad6e45
SHA512

4b2bf3c45b3af63443edfcc8ce58160080cee612b5dc0c71c994dd597850022c4f4f9940d24055baa5e1fe658dbadfc608991e7f1171a1b15d17e3857eb84e5c
SSDEEP

768:9prqMdZjwt8Z0h2J8di9jZFM2YnYLBhRxyxALmxZkkGFscqhH:XeMvU8Z0h2yQ9Nu2kYNLI2LmwfY

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

132.145.75.68:3965

132.145.75.68:2885

Mutex

ftolxmmyozfj

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
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x00080000000281f1-7.dat	family_asyncrat

Checks computer location settings 2 TTPs 2 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-1-5-21-2423602651-1712563293-711691555-1000\Control Panel\International\Geo\Nation	RUNMEFIRST.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2423602651-1712563293-711691555-1000\Control Panel\International\Geo\Nation	Windows Security Notification System.exe

Executes dropped EXE 1 IoCs

pid	Process
1708	Windows Security Notification System.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 (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	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\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\EnableWindowColorization = "125"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	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\ColorizationGlassAttribute = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	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\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\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1708	Windows Security Notification System.exe
1708	Windows Security Notification System.exe
1708	Windows Security Notification System.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1708	Windows Security Notification System.exe
Token: SeShutdownPrivilege	1952	shutdown.exe
Token: SeRemoteShutdownPrivilege	1952	shutdown.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1708	Windows Security Notification System.exe
5292	LogonUI.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 6076 wrote to memory of 1708	6076	RUNMEFIRST.exe	83
PID 6076 wrote to memory of 1708	6076	RUNMEFIRST.exe	83
PID 1708 wrote to memory of 2328	1708	Windows Security Notification System.exe	92
PID 1708 wrote to memory of 2328	1708	Windows Security Notification System.exe	92
PID 2328 wrote to memory of 1952	2328	cmd.exe	94
PID 2328 wrote to memory of 1952	2328	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\RUNMEFIRST.exe
"C:\Users\Admin\AppData\Local\Temp\RUNMEFIRST.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:6076
- C:\Users\Admin\AppData\Local\Temp\Windows Security Notification System.exe
  "C:\Users\Admin\AppData\Local\Temp\Windows Security Notification System.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1708
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c Shutdown /s /f /t 00
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2328
  - - C:\Windows\system32\shutdown.exe
      Shutdown /s /f /t 00
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1952

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3a37055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:5292

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

C:\Users\Admin\AppData\Local\Temp\Windows Security Notification System.exe

Filesize
74KB

MD5
0b601635bd4ee178cc30afe7d4e72051

SHA1
dbec5361eb7e64902441fd8d205e1a96d191d735

SHA256
2d1f81c62216894d4840e544b0c3c8882364cfa730946d0cd02d2ce22694e50f

SHA512
d5499c55852a8c91a8b79e3d91202897ce6364408b3927fabbb8a20067fa8cd655973e8e1ca414a01dc67a92b0186a0156203c2f1a6b17e32b0e4e28d0b2b946

Download Submit
memory/1708-28-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-30-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-40-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-39-0x000000001ABA0000-0x000000001AC06000-memory.dmp

Filesize
408KB

Download
memory/1708-19-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-20-0x0000000000150000-0x0000000000168000-memory.dmp

Filesize
96KB

Download
memory/1708-22-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-23-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-26-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-31-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-38-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-29-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-37-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-32-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-33-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/1708-34-0x000000001C9B0000-0x000000001CA26000-memory.dmp

Filesize
472KB

Download
memory/1708-35-0x000000001AD50000-0x000000001AD60000-memory.dmp

Filesize
64KB

Download
memory/1708-36-0x000000001B390000-0x000000001B3AE000-memory.dmp

Filesize
120KB

Download
memory/6076-0-0x00007FF89FC43000-0x00007FF89FC45000-memory.dmp

Filesize
8KB

Download
memory/6076-3-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/6076-18-0x00007FF89FC40000-0x00007FF8A0702000-memory.dmp

Filesize
10.8MB

Download
memory/6076-1-0x0000000000EE0000-0x0000000000EF2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

Errors