asyncrat | 1d7d7e2b90752b9ae4b7cd7db8b62cb0dddee15aa0d6102efd3bb29691ab0fa7

General

Target

Client (3).exe
Size

170KB
MD5

12e347cf5ba0b74e0f93b8759d1d99cb
SHA1

fe0341f382947c8303cdbf400729c441aca184e0
SHA256

1d7d7e2b90752b9ae4b7cd7db8b62cb0dddee15aa0d6102efd3bb29691ab0fa7
SHA512

3ee3d406322b7f0decb06d52951a20f99358be0dd7feeebd4e0784f2a438e33437b806bcadae32827b51da529a17b63fef763932ee571729de740fd06ec62a9e
SSDEEP

3072:JUacxyNl+GPMV3e9VdQsH1bfkBQXv7Jh1fRu1e16kWOIo0tnBBY:J1l+GPMV3aesVb8Bkb139Yo05f

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

147.185.221.21:4449

147.185.221.21:6703

147.185.221.21:5552

Mutex

wvpjsbhmwvbzxetbd

Attributes

delay
1
install
true
install_file
mm.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/0x000f0000000233fc-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-1-5-21-384068567-2943195810-3631207890-1000\Control Panel\International\Geo\Nation	Client (3).exe

Executes dropped EXE 1 IoCs

pid	Process
4420	mm.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
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
1412	schtasks.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
1140	Client (3).exe
4420	mm.exe
4420	mm.exe
4420	mm.exe
4420	mm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1140	Client (3).exe
Token: SeDebugPrivilege	4420	mm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4420	mm.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1140 wrote to memory of 768	1140	Client (3).exe	86
PID 1140 wrote to memory of 768	1140	Client (3).exe	86
PID 1140 wrote to memory of 4488	1140	Client (3).exe	88
PID 1140 wrote to memory of 4488	1140	Client (3).exe	88
PID 4488 wrote to memory of 2996	4488	cmd.exe	90
PID 4488 wrote to memory of 2996	4488	cmd.exe	90
PID 768 wrote to memory of 1412	768	cmd.exe	91
PID 768 wrote to memory of 1412	768	cmd.exe	91
PID 4488 wrote to memory of 4420	4488	cmd.exe	92
PID 4488 wrote to memory of 4420	4488	cmd.exe	92

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 (3).exe
"C:\Users\Admin\AppData\Local\Temp\Client (3).exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1140
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "mm" /tr '"C:\Users\Admin\AppData\Roaming\mm.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:768
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "mm" /tr '"C:\Users\Admin\AppData\Roaming\mm.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1412
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpAF7A.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4488
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2996
- - C:\Users\Admin\AppData\Roaming\mm.exe
    "C:\Users\Admin\AppData\Roaming\mm.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4420

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\tmpAF7A.tmp.bat

Filesize
146B

MD5
eda8bc2933d56c927a7fb130f5713675

SHA1
4262a862ffa9cc073eccd71f2accf54b2ff783b3

SHA256
21d406dfd8a99e011497b41b7bcab2121a80297a8c93946005e0e0ae9d9d60e0

SHA512
d00b371ab966fbf42b028e3f4f6fdd6e901f14e7c0921a9542a415895f9d75328a308c1ed41ac3134b2f0c72478a1409876517d92f4905bc4c1a845c7ccf8eb7

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

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C:\Users\Admin\AppData\Roaming\mm.exe

Filesize
170KB

MD5
12e347cf5ba0b74e0f93b8759d1d99cb

SHA1
fe0341f382947c8303cdbf400729c441aca184e0

SHA256
1d7d7e2b90752b9ae4b7cd7db8b62cb0dddee15aa0d6102efd3bb29691ab0fa7

SHA512
3ee3d406322b7f0decb06d52951a20f99358be0dd7feeebd4e0784f2a438e33437b806bcadae32827b51da529a17b63fef763932ee571729de740fd06ec62a9e

Download Submit
memory/1140-1-0x00000000009B0000-0x00000000009E0000-memory.dmp

Filesize
192KB

Download
memory/1140-0-0x00007FF83B0D3000-0x00007FF83B0D5000-memory.dmp

Filesize
8KB

Download
memory/1140-3-0x00007FF83B0D0000-0x00007FF83BB91000-memory.dmp

Filesize
10.8MB

Download
memory/1140-8-0x00007FF83B0D0000-0x00007FF83BB91000-memory.dmp

Filesize
10.8MB

Download
memory/1140-9-0x00007FF83B0D0000-0x00007FF83BB91000-memory.dmp

Filesize
10.8MB

Download
memory/4420-15-0x00000000017C0000-0x0000000001836000-memory.dmp

Filesize
472KB

Download
memory/4420-16-0x0000000001740000-0x000000000174E000-memory.dmp

Filesize
56KB

Download
memory/4420-17-0x0000000001770000-0x000000000178E000-memory.dmp

Filesize
120KB

Download
memory/4420-18-0x00000000018A0000-0x00000000018B0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads