asyncrat | 1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146

Analysis

max time kernel
148s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
04-08-2024 11:58

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General

Target

1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
Size

74KB
MD5

143734ace32a278d89d77af8c7fdfa80
SHA1

ef834bb92bb57eda87458d1a2ee3525a4b91a6ef
SHA256

1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146
SHA512

e894eecfa4f84dc1e0abbc07cab9faefbf4e9cdd6e4a93089970ce16d01e1db4aa3bd309281e07a36d854691852654e099eecc18244db377cc5664c458a7ce9d
SSDEEP

1536:/Ut8cxqnHXC56PMV+e9VdQuDI6H1bf/TOur1LQzcQTtVclN:/UOcxq3O6PMV+e9VdQsH1bfLPrVQlT/Y

Score

10^/10

asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Mutex

rufrwqqzhtx

Attributes

delay
1
install
true
install_file
WinUpdate.exe
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
behavioral2/files/0x000300000002a9c1-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4772	WinUpdate.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3272	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4916	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe
4772	WinUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
Token: SeDebugPrivilege	4772	WinUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4772	WinUpdate.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2008 wrote to memory of 3548	2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe	81
PID 2008 wrote to memory of 3548	2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe	81
PID 2008 wrote to memory of 1576	2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe	82
PID 2008 wrote to memory of 1576	2008	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe	82
PID 1576 wrote to memory of 3272	1576	cmd.exe	86
PID 1576 wrote to memory of 3272	1576	cmd.exe	86
PID 3548 wrote to memory of 4916	3548	cmd.exe	85
PID 3548 wrote to memory of 4916	3548	cmd.exe	85
PID 1576 wrote to memory of 4772	1576	cmd.exe	87
PID 1576 wrote to memory of 4772	1576	cmd.exe	87

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
"C:\Users\Admin\AppData\Local\Temp\1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2008
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3548
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4916
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB621.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1576
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3272
- - C:\Users\Admin\AppData\Roaming\WinUpdate.exe
    "C:\Users\Admin\AppData\Roaming\WinUpdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4772

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB621.tmp.bat

Filesize
153B

MD5
12f938eba81ad00252615bb05ab0609f

SHA1
f42e7b5a0af03d05c95185600532cec0f4bd0614

SHA256
3ffaeb415014d0428a190c78891d01c30d8b7006f2cff3130fea8db7a669eb57

SHA512
7f144a745dfbf316086b3e99ec462189b1899df18418da08072422142ceb1bee3aecd441810ade1b94c4410f04745de8284d945f7fc4e2d0fcf376ad493bb5d7

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

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

Filesize
74KB

MD5
143734ace32a278d89d77af8c7fdfa80

SHA1
ef834bb92bb57eda87458d1a2ee3525a4b91a6ef

SHA256
1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146

SHA512
e894eecfa4f84dc1e0abbc07cab9faefbf4e9cdd6e4a93089970ce16d01e1db4aa3bd309281e07a36d854691852654e099eecc18244db377cc5664c458a7ce9d

Download Submit
memory/2008-0-0x00007FFAE6803000-0x00007FFAE6805000-memory.dmp

Filesize
8KB

Download
memory/2008-1-0x0000000000340000-0x0000000000358000-memory.dmp

Filesize
96KB

Download
memory/2008-3-0x00007FFAE6800000-0x00007FFAE72C2000-memory.dmp

Filesize
10.8MB

Download
memory/2008-10-0x00007FFAE6800000-0x00007FFAE72C2000-memory.dmp

Filesize
10.8MB

Download
memory/2008-4-0x00007FFAE6800000-0x00007FFAE72C2000-memory.dmp

Filesize
10.8MB

Download