asyncrat | a1ab0b66e66d84c8687298d71c66e347ac8b22d8ba7b7aedec7867c54ed8a14e

Analysis

max time kernel
810s
max time network
807s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-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
behavioral3/files/0x001f00000002aaa5-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
3688	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
2896	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
3092	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
4572	Fixer (1).exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe
3688	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4572	Fixer (1).exe
Token: SeDebugPrivilege	3688	System.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4572 wrote to memory of 2680	4572	Fixer (1).exe	79
PID 4572 wrote to memory of 2680	4572	Fixer (1).exe	79
PID 4572 wrote to memory of 3232	4572	Fixer (1).exe	80
PID 4572 wrote to memory of 3232	4572	Fixer (1).exe	80
PID 3232 wrote to memory of 2896	3232	cmd.exe	83
PID 3232 wrote to memory of 2896	3232	cmd.exe	83
PID 2680 wrote to memory of 3092	2680	cmd.exe	84
PID 2680 wrote to memory of 3092	2680	cmd.exe	84
PID 3232 wrote to memory of 3688	3232	cmd.exe	85
PID 3232 wrote to memory of 3688	3232	cmd.exe	85

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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4572
- 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:2680
- - 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:3092
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB17D.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3232
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2896
- - 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:3688

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\tmpB17D.tmp.bat

Filesize
150B

MD5
b3e723900f2ee74d65e56792aa9788bb

SHA1
3f0f272a9d1e75e0f1048b77b5530710da289571

SHA256
492d7215f6033e69033cbcd8a156f77d50283cc34e8268c04fa6df7655a530e2

SHA512
41ee632cb4f1f588c315cfb1e8e412e6730b1fd0e192d67a2d27df1acc7856490e42f1279598add62f9f5c6f2c1d652cf8cf0d9b87607eb7f302fb6240155df4

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

Filesize
63KB

MD5
1b13586a90a4197f78ae7fbbb62cd2c3

SHA1
b6c29b130e1c3d442e7850de3c5303284685c610

SHA256
a1ab0b66e66d84c8687298d71c66e347ac8b22d8ba7b7aedec7867c54ed8a14e

SHA512
97002dfd7f4a4b14e489f952f2802b04a1bf2938fb3870bf89dd2998fa56e4531717d117bf872e8d1f601bd6edeac59a73ee262fa3923ba1db8b5ff1541eccb9

Download Submit
memory/3688-15-0x000000001D100000-0x000000001D176000-memory.dmp

Filesize
472KB

Download
memory/3688-16-0x000000001D080000-0x000000001D0B4000-memory.dmp

Filesize
208KB

Download
memory/3688-17-0x000000001B180000-0x000000001B19E000-memory.dmp

Filesize
120KB

Download
memory/4572-0-0x00007FF86DED3000-0x00007FF86DED5000-memory.dmp

Filesize
8KB

Download
memory/4572-1-0x0000000000F00000-0x0000000000F16000-memory.dmp

Filesize
88KB

Download
memory/4572-2-0x00007FF86DED0000-0x00007FF86E992000-memory.dmp

Filesize
10.8MB

Download
memory/4572-3-0x00007FF86DED0000-0x00007FF86E992000-memory.dmp

Filesize
10.8MB

Download
memory/4572-9-0x00007FF86DED0000-0x00007FF86E992000-memory.dmp

Filesize
10.8MB

Download