asyncrat | ea3c775091e46699351431b25485fae1526c063a3b1be543cdc1c5c4ee397d92

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-12-2024 15:16

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General

Target

Client.exe
Size

74KB
MD5

6d047d603a107c3193aef35717af7b6f
SHA1

32034f120ac1c1132e137ddba1e6220aacb702a2
SHA256

ea3c775091e46699351431b25485fae1526c063a3b1be543cdc1c5c4ee397d92
SHA512

00ea5f0686d40dbae3958cb67324fdf8c0f1d493af497b84d0989437c14166e10ffae370f62d8c0eeb929e9ca65aa20ffcc815b8d585a9b2f53c062b04cd2639
SSDEEP

1536:9UOgcxLVNCBWPMVWe9VdQuDI6H1bf/4VAQzcmLVclN:9UfcxLfaWPMVWe9VdQsH1bfgeQ/BY

Score

10^/10

asyncrat venomrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

127.0.0.1:4449

Mutex

bgflrgweuset

Attributes

delay
1
install
true
install_file
defender.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/552-1-0x0000000000CE0000-0x0000000000CF8000-memory.dmp	VenomRAT
behavioral2/files/0x0008000000023bb9-12.dat	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x0008000000023bb9-12.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 1 IoCs

pid	Process
4092	defender.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
4884	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
2756	schtasks.exe

Suspicious behavior: EnumeratesProcesses 53 IoCs

pid	Process
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
552	Client.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe
4092	defender.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	552	Client.exe
Token: SeDebugPrivilege	4092	defender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4092	defender.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 552 wrote to memory of 752	552	Client.exe	83
PID 552 wrote to memory of 752	552	Client.exe	83
PID 552 wrote to memory of 5108	552	Client.exe	84
PID 552 wrote to memory of 5108	552	Client.exe	84
PID 5108 wrote to memory of 4884	5108	cmd.exe	87
PID 5108 wrote to memory of 4884	5108	cmd.exe	87
PID 752 wrote to memory of 2756	752	cmd.exe	88
PID 752 wrote to memory of 2756	752	cmd.exe	88
PID 5108 wrote to memory of 4092	5108	cmd.exe	90
PID 5108 wrote to memory of 4092	5108	cmd.exe	90

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\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:552
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "defender" /tr '"C:\Users\Admin\AppData\Roaming\defender.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:752
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "defender" /tr '"C:\Users\Admin\AppData\Roaming\defender.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2756
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA921.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5108
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4884
- - C:\Users\Admin\AppData\Roaming\defender.exe
    "C:\Users\Admin\AppData\Roaming\defender.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4092

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\tmpA921.tmp.bat

Filesize
152B

MD5
37641cc2c70396c676a5d2e6b1e1f9a5

SHA1
c615bd5b4a8cef765bc1185c5b261bf385372603

SHA256
7b1cc77d13cfbc508be69a7676d1cd6fe755f8c68440ab99713fe1b84e7b8844

SHA512
e956faa7ffd44d6a2fbe0faeaa7cc9c22bdadbb04d23c3d3e7c23c1853b76d23dedf5e6b47e5d3bcff619ebdcc865040ed2df50917501e8c2015e30cc830e4f0

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\defender.exe

Filesize
74KB

MD5
6d047d603a107c3193aef35717af7b6f

SHA1
32034f120ac1c1132e137ddba1e6220aacb702a2

SHA256
ea3c775091e46699351431b25485fae1526c063a3b1be543cdc1c5c4ee397d92

SHA512
00ea5f0686d40dbae3958cb67324fdf8c0f1d493af497b84d0989437c14166e10ffae370f62d8c0eeb929e9ca65aa20ffcc815b8d585a9b2f53c062b04cd2639

Download Submit
memory/552-0-0x00007FF8244B3000-0x00007FF8244B5000-memory.dmp

Filesize
8KB

Download
memory/552-1-0x0000000000CE0000-0x0000000000CF8000-memory.dmp

Filesize
96KB

Download
memory/552-3-0x00007FF8244B0000-0x00007FF824F71000-memory.dmp

Filesize
10.8MB

Download
memory/552-8-0x00007FF8244B0000-0x00007FF824F71000-memory.dmp

Filesize
10.8MB

Download
memory/552-9-0x00007FF8244B0000-0x00007FF824F71000-memory.dmp

Filesize
10.8MB

Download