asyncrat | a1ab0b66e66d84c8687298d71c66e347ac8b22d8ba7b7aedec7867c54ed8a14e

Analysis

max time kernel
990s
max time network
988s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
31-12-2024 03:50

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General

Target

Fixer (1).exe
Size

63KB
MD5

1b13586a90a4197f78ae7fbbb62cd2c3
SHA1

b6c29b130e1c3d442e7850de3c5303284685c610
SHA256

a1ab0b66e66d84c8687298d71c66e347ac8b22d8ba7b7aedec7867c54ed8a14e
SHA512

97002dfd7f4a4b14e489f952f2802b04a1bf2938fb3870bf89dd2998fa56e4531717d117bf872e8d1f601bd6edeac59a73ee262fa3923ba1db8b5ff1541eccb9
SSDEEP

768:RdGnVhwdjndk78TQC8A+XiuazcBRL5JTk1+T4KSBGHmDbD/ph0oXpC4AdvCSuAdP:mnSdsNdSJYUbdh9ps1uAdpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

associated-chevy.gl.at.ply.gg:46398

Attributes

delay
1
install
true
install_file
System.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
behavioral1/files/0x000b000000023ba5-11.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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Fixer (1).exe

Executes dropped EXE 1 IoCs

pid	Process
1772	System.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
1800	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
536	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1324	Fixer (1).exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe
1772	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1324	Fixer (1).exe
Token: SeDebugPrivilege	1772	System.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1324 wrote to memory of 392	1324	Fixer (1).exe	84
PID 1324 wrote to memory of 392	1324	Fixer (1).exe	84
PID 1324 wrote to memory of 4804	1324	Fixer (1).exe	86
PID 1324 wrote to memory of 4804	1324	Fixer (1).exe	86
PID 392 wrote to memory of 536	392	cmd.exe	89
PID 392 wrote to memory of 536	392	cmd.exe	89
PID 4804 wrote to memory of 1800	4804	cmd.exe	90
PID 4804 wrote to memory of 1800	4804	cmd.exe	90
PID 4804 wrote to memory of 1772	4804	cmd.exe	92
PID 4804 wrote to memory of 1772	4804	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\Fixer (1).exe
"C:\Users\Admin\AppData\Local\Temp\Fixer (1).exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1324
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:392
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:536
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9700.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4804
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1800
- - C:\Users\Admin\AppData\Roaming\System.exe
    "C:\Users\Admin\AppData\Roaming\System.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1772

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\tmp9700.tmp.bat

Filesize
150B

MD5
4be694a72f2967958d9cc23f413f5d87

SHA1
d41a8309e3171151d2737ce0c07dd20a399120b6

SHA256
b515a98ae23d5110dfd9b0f4e55016744db945ad8d4675b2b2d4f1e74eedda71

SHA512
0e72792ac090b8751786aa565c27d67709dfb8abd11946d991112c96b3d75122e6e45f160b8ca7be53d1e440fa73dff55e9787c8f6e1fae8a3405034207962b1

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

Filesize
63KB

MD5
1b13586a90a4197f78ae7fbbb62cd2c3

SHA1
b6c29b130e1c3d442e7850de3c5303284685c610

SHA256
a1ab0b66e66d84c8687298d71c66e347ac8b22d8ba7b7aedec7867c54ed8a14e

SHA512
97002dfd7f4a4b14e489f952f2802b04a1bf2938fb3870bf89dd2998fa56e4531717d117bf872e8d1f601bd6edeac59a73ee262fa3923ba1db8b5ff1541eccb9

Download Submit
memory/1324-0-0x00007FFC4FD43000-0x00007FFC4FD45000-memory.dmp

Filesize
8KB

Download
memory/1324-1-0x0000000000210000-0x0000000000226000-memory.dmp

Filesize
88KB

Download
memory/1324-2-0x00007FFC4FD40000-0x00007FFC50801000-memory.dmp

Filesize
10.8MB

Download
memory/1324-7-0x00007FFC4FD40000-0x00007FFC50801000-memory.dmp

Filesize
10.8MB

Download
memory/1324-8-0x00007FFC4FD40000-0x00007FFC50801000-memory.dmp

Filesize
10.8MB

Download