asyncrat | 1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146

Analysis

max time kernel
148s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-08-2024 01:13

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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/0x00070000000004e7-12.dat	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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe

Executes dropped EXE 1 IoCs

pid	Process
876	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
4664	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
4156	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe
876	WinUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe
Token: SeDebugPrivilege	876	WinUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
876	WinUpdate.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3512 wrote to memory of 2944	3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe	93
PID 3512 wrote to memory of 2944	3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe	93
PID 3512 wrote to memory of 976	3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe	95
PID 3512 wrote to memory of 976	3512	1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146.exe	95
PID 2944 wrote to memory of 4156	2944	cmd.exe	97
PID 2944 wrote to memory of 4156	2944	cmd.exe	97
PID 976 wrote to memory of 4664	976	cmd.exe	98
PID 976 wrote to memory of 4664	976	cmd.exe	98
PID 976 wrote to memory of 876	976	cmd.exe	99
PID 976 wrote to memory of 876	976	cmd.exe	99

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⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3512
- 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:2944
- - 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:4156
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp48CC.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:976
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4664
- - 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:876

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4388,i,3210801877307184477,8078594481454001567,262144 --variations-seed-version --mojo-platform-channel-handle=1436 /prefetch:8
1⤵
PID:704

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\tmp48CC.tmp.bat

Filesize
153B

MD5
9a3c59da8663674ebe162ab052bf4108

SHA1
f2e95410cc48cd228cc230363603ce852f1826a3

SHA256
437369d5d74bfe314c3be908661a7aaf3d9644ca7a243b5e09c6427b9c56f57d

SHA512
ebc67f791db127078886285cd30ae97e2e3b93e418e77d3d2d5d981d29030610cc84193f9da3e1596b4cc27ab7075f5eb44da9ed5c9474e176e5e1040cd6facd

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/3512-0-0x0000000000270000-0x0000000000288000-memory.dmp

Filesize
96KB

Download
memory/3512-1-0x00007FFDE9423000-0x00007FFDE9425000-memory.dmp

Filesize
8KB

Download
memory/3512-3-0x00007FFDE9420000-0x00007FFDE9EE1000-memory.dmp

Filesize
10.8MB

Download
memory/3512-8-0x00007FFDE9420000-0x00007FFDE9EE1000-memory.dmp

Filesize
10.8MB

Download