asyncrat | 3d0b19a62038f874efce6e1286a7d591c43935c14e9b9f4cd7a94901fc17cdcb

Analysis

max time kernel
140s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
21-07-2024 10:24

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Debug/Updater.exe
Size

74KB
MD5

6a573caf7b6f745e3113b602cc67db13
SHA1

1068547d9db8ba426e6dc9f5f5c7989873eeb3d1
SHA256

3ffae8507d10a4e66855339335a797343dcc19c6a8f48314bc678d03f06bb115
SHA512

badd9cbe3819c87b6cd3da58265e98d4f1f270e80d44589c70f6c9c7542199286a9b4c2b60462e1cb48ae85a2d79d89199b01332f6c797bd1bf54f862da3e2ec
SSDEEP

1536:lUPkcx5v/5CxSPMV6e9VdQuDI6H1bf/s/NQzc2LVclN:lUMcx5vx2SPMV6e9VdQsH1bfAQPBY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

127.0.0.1:9090

127.0.0.1:27853

147.185.221.20:9090

147.185.221.20:27853

Mutex

otjnojdxtcgqahud

Attributes

delay
1
install
true
install_file
DustyV1.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
behavioral16/files/0x00090000000234de-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-1-5-21-1176886754-713327781-2233697964-1000\Control Panel\International\Geo\Nation	Updater.exe

Executes dropped EXE 1 IoCs

pid	Process
2156	DustyV1.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
2996	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
1168	schtasks.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

pid	Process
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
4872	Updater.exe
2156	DustyV1.exe
2156	DustyV1.exe
2156	DustyV1.exe
2156	DustyV1.exe
2156	DustyV1.exe
2156	DustyV1.exe
2156	DustyV1.exe
2156	DustyV1.exe
2156	DustyV1.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4872	Updater.exe
Token: SeDebugPrivilege	2156	DustyV1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2156	DustyV1.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4872 wrote to memory of 4996	4872	Updater.exe	87
PID 4872 wrote to memory of 4996	4872	Updater.exe	87
PID 4872 wrote to memory of 1536	4872	Updater.exe	89
PID 4872 wrote to memory of 1536	4872	Updater.exe	89
PID 4996 wrote to memory of 1168	4996	cmd.exe	91
PID 4996 wrote to memory of 1168	4996	cmd.exe	91
PID 1536 wrote to memory of 2996	1536	cmd.exe	92
PID 1536 wrote to memory of 2996	1536	cmd.exe	92
PID 1536 wrote to memory of 2156	1536	cmd.exe	97
PID 1536 wrote to memory of 2156	1536	cmd.exe	97

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\Debug\Updater.exe
"C:\Users\Admin\AppData\Local\Temp\Debug\Updater.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4872
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "DustyV1" /tr '"C:\Users\Admin\AppData\Roaming\DustyV1.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4996
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "DustyV1" /tr '"C:\Users\Admin\AppData\Roaming\DustyV1.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1168
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC43A.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1536
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2996
- - C:\Users\Admin\AppData\Roaming\DustyV1.exe
    "C:\Users\Admin\AppData\Roaming\DustyV1.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2156

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC43A.tmp.bat

Filesize
151B

MD5
fd4da22eb8731f8fa2a0a4df9b44d5db

SHA1
0dbafaad00756be004edef21264094bfdae03360

SHA256
5cba0578e38fc0a08fa1d02919df5c5870fefe765c21d46244f1074994ca04ae

SHA512
750f65769ec6fbff7cc6fd3500c904aedbaca73e54b70117a9e60cd7cfa8d73a05ca7f99003c3ce0b940c46eaeb6fbc90f310062c1dfbfb2fe161c904ecf13a4

Download Submit
C:\Users\Admin\AppData\Roaming\DustyV1.exe

Filesize
74KB

MD5
6a573caf7b6f745e3113b602cc67db13

SHA1
1068547d9db8ba426e6dc9f5f5c7989873eeb3d1

SHA256
3ffae8507d10a4e66855339335a797343dcc19c6a8f48314bc678d03f06bb115

SHA512
badd9cbe3819c87b6cd3da58265e98d4f1f270e80d44589c70f6c9c7542199286a9b4c2b60462e1cb48ae85a2d79d89199b01332f6c797bd1bf54f862da3e2ec

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/4872-0-0x00007FFA53343000-0x00007FFA53345000-memory.dmp

Filesize
8KB

Download
memory/4872-1-0x0000000000580000-0x0000000000598000-memory.dmp

Filesize
96KB

Download
memory/4872-3-0x00007FFA53340000-0x00007FFA53E01000-memory.dmp

Filesize
10.8MB

Download
memory/4872-8-0x00007FFA53340000-0x00007FFA53E01000-memory.dmp

Filesize
10.8MB

Download
memory/4872-9-0x00007FFA53340000-0x00007FFA53E01000-memory.dmp

Filesize
10.8MB

Download