asyncrat | f3aa2b23a67f4dbcce9fff7bb084e70127e3e0c4f2ab0f605487c570a7408960

Analysis

max time kernel
148s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:12

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General

Target

6fe5c591a1fbdd543b030912700b164a.exe
Size

47KB
MD5

6fe5c591a1fbdd543b030912700b164a
SHA1

9667d52bec1f5257efb9b42b20a53500bd307aff
SHA256

5fee1b46ab28ddd6ac8f46e819b5340e10084660686f0d0e415ab4a7105c465a
SHA512

a3215288599e11f40e96fd4c63d14388e1c061cdbbe3d5e9e80c3d7e083a3e700c51d35058785534dd3d510072d09086863ef04534aac184765a7acdcc5b1a53
SSDEEP

768:QSQcFILSC+e+bibovnBIPRHoibzYbyged3FyGMa92w10AHEgK/J7BpqKYhY7:QSQMyUnB4Fncb12YGMI2q0AfkJ7BpqKX

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

38.49.43.182:8848

Mutex

DcRatMutex

Attributes

delay
1
install
true
install_file
svchostdc.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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral32/files/0x000b000000024148-10.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-1-5-21-3975168204-1612096350-4002976354-1000\Control Panel\International\Geo\Nation	6fe5c591a1fbdd543b030912700b164a.exe

Executes dropped EXE 1 IoCs

pid	Process
4708	svchostdc.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

defense_evasion

pid	Process
4648	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
4572	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe
4184	6fe5c591a1fbdd543b030912700b164a.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	6fe5c591a1fbdd543b030912700b164a.exe
Token: SeDebugPrivilege	4708	svchostdc.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4184 wrote to memory of 1624	4184	6fe5c591a1fbdd543b030912700b164a.exe	89
PID 4184 wrote to memory of 1624	4184	6fe5c591a1fbdd543b030912700b164a.exe	89
PID 4184 wrote to memory of 4020	4184	6fe5c591a1fbdd543b030912700b164a.exe	91
PID 4184 wrote to memory of 4020	4184	6fe5c591a1fbdd543b030912700b164a.exe	91
PID 1624 wrote to memory of 4572	1624	cmd.exe	93
PID 1624 wrote to memory of 4572	1624	cmd.exe	93
PID 4020 wrote to memory of 4648	4020	cmd.exe	94
PID 4020 wrote to memory of 4648	4020	cmd.exe	94
PID 4020 wrote to memory of 4708	4020	cmd.exe	95
PID 4020 wrote to memory of 4708	4020	cmd.exe	95

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\6fe5c591a1fbdd543b030912700b164a.exe
"C:\Users\Admin\AppData\Local\Temp\6fe5c591a1fbdd543b030912700b164a.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4184
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchostdc" /tr '"C:\Users\Admin\AppData\Roaming\svchostdc.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1624
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchostdc" /tr '"C:\Users\Admin\AppData\Roaming\svchostdc.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4572
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA77B.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4020
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4648
- - C:\Users\Admin\AppData\Roaming\svchostdc.exe
    "C:\Users\Admin\AppData\Roaming\svchostdc.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4708

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\tmpA77B.tmp.bat

Filesize
153B

MD5
7f2002a781c81990a4d3107a7ad1fe13

SHA1
4bece625fbed2c8fed94750e20da778d919627c5

SHA256
8460acd1429af1255888d966e693e98890885b23c05557cae25d2930d665bb43

SHA512
964401a6813fab46942420d2b47cebf4dc69445a9d3899a7b3f7fc1a3b1bab1b5af3d1adcb97512a9f37b9b9e0a1c7e461d635d3daf42986c03c10db45cb297a

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

Filesize
47KB

MD5
6fe5c591a1fbdd543b030912700b164a

SHA1
9667d52bec1f5257efb9b42b20a53500bd307aff

SHA256
5fee1b46ab28ddd6ac8f46e819b5340e10084660686f0d0e415ab4a7105c465a

SHA512
a3215288599e11f40e96fd4c63d14388e1c061cdbbe3d5e9e80c3d7e083a3e700c51d35058785534dd3d510072d09086863ef04534aac184765a7acdcc5b1a53

Download Submit
memory/4184-0-0x00007FFB5A303000-0x00007FFB5A305000-memory.dmp

Filesize
8KB

Download
memory/4184-1-0x00000000005D0000-0x00000000005E2000-memory.dmp

Filesize
72KB

Download
memory/4184-2-0x00007FFB5A300000-0x00007FFB5ADC1000-memory.dmp

Filesize
10.8MB

Download
memory/4184-7-0x00007FFB5A300000-0x00007FFB5ADC1000-memory.dmp

Filesize
10.8MB

Download