asyncrat | 847fe611efd7e9e6375b659664a9d53a4807d62d670cc8e591ad65b28297c58a

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
21-07-2024 20:00

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General

Target

zwirAFK.exe
Size

63KB
MD5

c9df1c28f720e04d38a9c44598cb33f9
SHA1

6ad67b10c1e355a9586a1cec3ae813e112148a17
SHA256

847fe611efd7e9e6375b659664a9d53a4807d62d670cc8e591ad65b28297c58a
SHA512

8611057f93ad5feb5cbca3535b07b40bf47a9fa1f26d3d18bc96c0238e83a7cfb64a8ec4986f12e9492c1b6d496c3a4f7df8d7da77f764d31edc3e06629c99b2
SSDEEP

1536:cRnrEGV/tWnpgUbfh9o2cmlukdpqKmY7:cFEGV0pgUbf8zm7Gz

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

192.168.1.108:2024

Attributes

delay
1
install
true
install_file
OperaGx.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/0x000b000000023356-11.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-1-5-21-1705699165-553239100-4129523827-1000\Control Panel\International\Geo\Nation	zwirAFK.exe

Executes dropped EXE 1 IoCs

pid	Process
400	OperaGx.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
1560	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
2056	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
4000	zwirAFK.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe
400	OperaGx.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4000	zwirAFK.exe
Token: SeDebugPrivilege	4000	zwirAFK.exe
Token: SeDebugPrivilege	400	OperaGx.exe
Token: SeDebugPrivilege	400	OperaGx.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4000 wrote to memory of 4356	4000	zwirAFK.exe	90
PID 4000 wrote to memory of 4356	4000	zwirAFK.exe	90
PID 4000 wrote to memory of 3612	4000	zwirAFK.exe	92
PID 4000 wrote to memory of 3612	4000	zwirAFK.exe	92
PID 3612 wrote to memory of 1560	3612	cmd.exe	94
PID 3612 wrote to memory of 1560	3612	cmd.exe	94
PID 4356 wrote to memory of 2056	4356	cmd.exe	95
PID 4356 wrote to memory of 2056	4356	cmd.exe	95
PID 3612 wrote to memory of 400	3612	cmd.exe	97
PID 3612 wrote to memory of 400	3612	cmd.exe	97

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\zwirAFK.exe
"C:\Users\Admin\AppData\Local\Temp\zwirAFK.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "OperaGx" /tr '"C:\Users\Admin\AppData\Roaming\OperaGx.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4356
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "OperaGx" /tr '"C:\Users\Admin\AppData\Roaming\OperaGx.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2056
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6E4A.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3612
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1560
- - C:\Users\Admin\AppData\Roaming\OperaGx.exe
    "C:\Users\Admin\AppData\Roaming\OperaGx.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:400

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\tmp6E4A.tmp.bat

Filesize
151B

MD5
45f531d25aa7c569333344f6cd67b2d3

SHA1
b8fe0f5bb576212443fd4495c5708ac6d6bef5f9

SHA256
1fb99a02ee3b0d492bc48429e9b2a6f6ac8b46f2024ef19c72e0ef704a277a26

SHA512
f82c841c0064de199952d3249411430f8710f648ec93ea825cf82acbd907047e58edfe4e01730f4eb39b29f36a4b791edd199e23c7cdd8c68670b90346b0229a

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

Filesize
63KB

MD5
c9df1c28f720e04d38a9c44598cb33f9

SHA1
6ad67b10c1e355a9586a1cec3ae813e112148a17

SHA256
847fe611efd7e9e6375b659664a9d53a4807d62d670cc8e591ad65b28297c58a

SHA512
8611057f93ad5feb5cbca3535b07b40bf47a9fa1f26d3d18bc96c0238e83a7cfb64a8ec4986f12e9492c1b6d496c3a4f7df8d7da77f764d31edc3e06629c99b2

Download Submit
memory/4000-0-0x00000000009B0000-0x00000000009C6000-memory.dmp

Filesize
88KB

Download
memory/4000-1-0x00007FFA46FB3000-0x00007FFA46FB5000-memory.dmp

Filesize
8KB

Download
memory/4000-2-0x00007FFA46FB0000-0x00007FFA47A71000-memory.dmp

Filesize
10.8MB

Download
memory/4000-7-0x00007FFA46FB0000-0x00007FFA47A71000-memory.dmp

Filesize
10.8MB

Download
memory/4000-8-0x00007FFA46FB0000-0x00007FFA47A71000-memory.dmp

Filesize
10.8MB

Download