asyncrat | 375c43c645f68b4ee517958f959233dd55a108408a961e6e74bc901bf691494d | Triage™

Analysis

max time kernel
299s
max time network
301s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
24/05/2024, 12:33

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General

Target
3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
Size 74KB
Sample240524-prcjascc64
SHA256 3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5
MD5 7ac0adf482250172280defec7a7054da
SHA1 20a25f0da68c309d062c4628ead8b6f377ac7969
SHA512 d03d033b931f3d39f95a1ec1cdc7d9014783f11b2438c265dd72c0bc34f9d5ced534a38c7c1c88ff930868fd9cf60521dd556b5c486c5cf364f798f39215a1aa
SSDEEP 1536:WUxQcxHCapCtGPMVCe9VdQuDI6H1bf/yBZUu7QzciLVclN:WUOcxHCoeGPMVCe9VdQsH1bfqvUwQzBY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

66.235.168.242:4449

Mutex

scgofjarww

Attributes

delay
1
install
true
install_file
Loader.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

resource	yara_rule
behavioral2/files/0x000800000001ac12-12.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1176	Loader.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

Scheduled Task/Job

pid	Process
4676	schtasks.exe

Delays execution with timeout.exe 1 IoCs

pid	Process
3280	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe
1176	Loader.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
Token: SeDebugPrivilege	1176	Loader.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1176	Loader.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3320 wrote to memory of 2252	3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe	72
PID 3320 wrote to memory of 2252	3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe	72
PID 3320 wrote to memory of 4472	3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe	74
PID 3320 wrote to memory of 4472	3320	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe	74
PID 4472 wrote to memory of 3280	4472	cmd.exe	76
PID 4472 wrote to memory of 3280	4472	cmd.exe	76
PID 2252 wrote to memory of 4676	2252	cmd.exe	77
PID 2252 wrote to memory of 4676	2252	cmd.exe	77
PID 4472 wrote to memory of 1176	4472	cmd.exe	78
PID 4472 wrote to memory of 1176	4472	cmd.exe	78

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\3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
"C:\Users\Admin\AppData\Local\Temp\3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3320
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Loader" /tr '"C:\Users\Admin\AppData\Roaming\Loader.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2252
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Loader" /tr '"C:\Users\Admin\AppData\Roaming\Loader.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:4676
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6801.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4472
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3280
- - C:\Users\Admin\AppData\Roaming\Loader.exe
    "C:\Users\Admin\AppData\Roaming\Loader.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:1176

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

tmp6801.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp6801.tmp.bat
Size 150B
SHA256 263dea8423c2e3ae7f62cfd70ef6433fa1a04cf8d43b1e2276eb2b6f019bfb4e
MD5 7ce183f7dfbf85a0c3fd5b7ec42f0f1c
SHA1 654173420d73a53f41eace5c83bb41cea4ae9c83
SHA512 1a3c591b14f52fe2ebfbda35f0dce28c6eea088d4b67f7588d87869302377e6a4314beef2a11a44a92e0ace3da1cb72aa9909117a6c4c08b23cb2119b76ac48e
MD5 SHA1 SHA512

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Loader.exe

Path C:\Users\Admin\AppData\Roaming\Loader.exe
Size 74KB
SHA256 3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5
MD5 7ac0adf482250172280defec7a7054da
SHA1 20a25f0da68c309d062c4628ead8b6f377ac7969
SHA512 d03d033b931f3d39f95a1ec1cdc7d9014783f11b2438c265dd72c0bc34f9d5ced534a38c7c1c88ff930868fd9cf60521dd556b5c486c5cf364f798f39215a1aa
SSDEEP 1536:WUxQcxHCapCtGPMVCe9VdQuDI6H1bf/yBZUu7QzciLVclN:WUOcxHCoeGPMVCe9VdQsH1bfqvUwQzBY
MD5 SHA1 SHA512 SSDEEP

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DataLogs.conf

Path C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
Size 8B
SHA256 c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
MD5 cf759e4c5f14fe3eec41b87ed756cea8
SHA1 c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA512 c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b
MD5 SHA1 SHA512

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memory/3320-0-0x00007FFB5F763000-0x00007FFB5F764000-memory.dmp

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memory/3320-1-0x0000000000AC0000-0x0000000000AD8000-memory.dmp

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memory/3320-3-0x00007FFB5F760000-0x00007FFB6014C000-memory.dmp

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memory/3320-4-0x00007FFB5F760000-0x00007FFB6014C000-memory.dmp

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memory/3320-9-0x00007FFB5F760000-0x00007FFB6014C000-memory.dmp

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