asyncrat | 749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450

Analysis

max time kernel
148s
max time network
94s
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

749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
Size

74KB
MD5

2d6a4155a7d17a0cfce4ad6e8571c674
SHA1

9992d09dfac2f5445a7d29d2ab1d68b42608b348
SHA256

749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450
SHA512

c6033f05cc9ec432dfe22a00aaf5461708f95954326a78c52f0c4617d50811a3ff30e99c300df28dea4530f2c952c1048d6f2c5415010b1a860c8570f45991ee
SSDEEP

1536:cOUt8cxqnHXC56PMVCUiLsiIyLH1bT/yDkuQzcaLVclN:cOUOcxq3O6PMV9iFLH1bT6IuQLBY

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/0x000400000002aa5f-12.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2252	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
3152	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
4788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe
2252	WinUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
Token: SeDebugPrivilege	2252	WinUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2252	WinUpdate.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4428 wrote to memory of 1724	4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe	78
PID 4428 wrote to memory of 1724	4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe	78
PID 4428 wrote to memory of 2808	4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe	80
PID 4428 wrote to memory of 2808	4428	749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe	80
PID 1724 wrote to memory of 4788	1724	cmd.exe	82
PID 1724 wrote to memory of 4788	1724	cmd.exe	82
PID 2808 wrote to memory of 3152	2808	cmd.exe	83
PID 2808 wrote to memory of 3152	2808	cmd.exe	83
PID 2808 wrote to memory of 2252	2808	cmd.exe	84
PID 2808 wrote to memory of 2252	2808	cmd.exe	84

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\749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe
"C:\Users\Admin\AppData\Local\Temp\749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4428
- 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:1724
- - 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:4788
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7CA2.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2808
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3152
- - 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:2252

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\tmp7CA2.tmp.bat

Filesize
153B

MD5
d1667dd049ba96789c59c2079cc67690

SHA1
d17337a0283a881fb619dc651b8fdaae44596639

SHA256
092f86747ff77e91897b3e4dda666cbb4306002b01666e560414d8d7cae27352

SHA512
13201eef3b01fd8f9a5c83524381e18b809c0c9ce13b31765ec1d5e5818cd762f1c18789c40465bfe6b1b7086a55851a54148b606dda368edfc414f0d0662dc4

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
2d6a4155a7d17a0cfce4ad6e8571c674

SHA1
9992d09dfac2f5445a7d29d2ab1d68b42608b348

SHA256
749911c61e23b64b45f28d453a8b70275f824092d8dab39ccc1e93464d26b450

SHA512
c6033f05cc9ec432dfe22a00aaf5461708f95954326a78c52f0c4617d50811a3ff30e99c300df28dea4530f2c952c1048d6f2c5415010b1a860c8570f45991ee

Download Submit
memory/4428-0-0x00007FFA59F33000-0x00007FFA59F35000-memory.dmp

Filesize
8KB

Download
memory/4428-1-0x00000000006B0000-0x00000000006C8000-memory.dmp

Filesize
96KB

Download
memory/4428-3-0x00007FFA59F30000-0x00007FFA5A9F2000-memory.dmp

Filesize
10.8MB

Download
memory/4428-4-0x00007FFA59F30000-0x00007FFA5A9F2000-memory.dmp

Filesize
10.8MB

Download
memory/4428-10-0x00007FFA59F30000-0x00007FFA5A9F2000-memory.dmp

Filesize
10.8MB

Download