asyncrat | 1c06c3a8b59c5fbe1ffa91f8bc75191fffc8e0f0281ee4ca7899e20e3b6abfb6

General

Target

Venom Client/Venom.exe
Size

74KB
MD5

c745590f5b7590f217bb204d27e91a00
SHA1

9d60ffc369b1fbdae8549b859729f47477658ddd
SHA256

dfb98932671339fb633c74180dba3810d9382e56618d75b3f67ae2ba3206aa1d
SHA512

5c6082eb180abeceda71ac259f9fef4bd90b47e3d2adf05280f7e0a3e3b6bed1508a0e09d6f5bcbcc7bfa868b0fc2fd9ff00dab7121baa778e575eed32dddaf3
SSDEEP

1536:ZUNwcxbUTCrmPMVIEh3kLuaIsH1bTc6yOQzc2LVclN:ZUicxbgwmPMVffAH1bTVQPBY

Score

10^/10

asyncrat venomrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

Mutex

wgzvrzpksxgiaglrvq

Attributes

c2_url_file
https://paste.ee/r/Wp7LQ/0
delay
1
install
true
install_file
System.exe
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

VenomRAT 2 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral2/memory/5004-1-0x0000000000EA0000-0x0000000000EB8000-memory.dmp	VenomRAT
behavioral2/files/0x000a000000023b8d-12.dat	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000a000000023b8d-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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Venom.exe

Executes dropped EXE 1 IoCs

pid	Process
216	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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3708	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
4384	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
5004	Venom.exe
216	System.exe
216	System.exe
216	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5004	Venom.exe
Token: SeDebugPrivilege	216	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
216	System.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5004 wrote to memory of 4896	5004	Venom.exe	83
PID 5004 wrote to memory of 4896	5004	Venom.exe	83
PID 5004 wrote to memory of 4872	5004	Venom.exe	84
PID 5004 wrote to memory of 4872	5004	Venom.exe	84
PID 4872 wrote to memory of 3708	4872	cmd.exe	88
PID 4872 wrote to memory of 3708	4872	cmd.exe	88
PID 4896 wrote to memory of 4384	4896	cmd.exe	87
PID 4896 wrote to memory of 4384	4896	cmd.exe	87
PID 4872 wrote to memory of 216	4872	cmd.exe	89
PID 4872 wrote to memory of 216	4872	cmd.exe	89

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\Venom Client\Venom.exe
"C:\Users\Admin\AppData\Local\Temp\Venom Client\Venom.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5004
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4896
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4384
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7F23.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4872
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3708
- - C:\Users\Admin\AppData\Roaming\System.exe
    "C:\Users\Admin\AppData\Roaming\System.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:216

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp7F23.tmp.bat

Filesize
150B

MD5
64e029dd65d8aec5f73d6ad8ad37366e

SHA1
397e209787763e34437d4115c41d5484d61a5fd2

SHA256
895b46721a831474f16e14be65b5d9d98bfe3d13d035e67c59f49f3349fdd25a

SHA512
4232baa02cff9d9b180648656cc1327389ed5b78ca7b0b37e5ef8e9708881bb5d7cc13790f332a4aa8d2d5b8b0d5640090485ec7ab12f822737f51b2c5f4b343

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\System.exe

Filesize
74KB

MD5
c745590f5b7590f217bb204d27e91a00

SHA1
9d60ffc369b1fbdae8549b859729f47477658ddd

SHA256
dfb98932671339fb633c74180dba3810d9382e56618d75b3f67ae2ba3206aa1d

SHA512
5c6082eb180abeceda71ac259f9fef4bd90b47e3d2adf05280f7e0a3e3b6bed1508a0e09d6f5bcbcc7bfa868b0fc2fd9ff00dab7121baa778e575eed32dddaf3

Download Submit
memory/5004-0-0x00007FFE10933000-0x00007FFE10935000-memory.dmp

Filesize
8KB

Download
memory/5004-1-0x0000000000EA0000-0x0000000000EB8000-memory.dmp

Filesize
96KB

Download
memory/5004-3-0x00007FFE10930000-0x00007FFE113F1000-memory.dmp

Filesize
10.8MB

Download
memory/5004-8-0x00007FFE10930000-0x00007FFE113F1000-memory.dmp

Filesize
10.8MB

Download
memory/5004-9-0x00007FFE10930000-0x00007FFE113F1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads