asyncrat | 8ef32b44cf21b690415e603eb6889c8c2e9294e76028b9dbd4c20a23077167f8

General

Target

Client.exe
Size

47KB
MD5

8a0bb8ae35abf7a92325e632a5a3adc0
SHA1

0042da0ec0b6f9c32a06becc845e0591870e410c
SHA256

8ef32b44cf21b690415e603eb6889c8c2e9294e76028b9dbd4c20a23077167f8
SHA512

ef89ad0def338bfab7e8fe435b1c964e62c56d0589721dda750e72b861492c6bccef7be95190b9df974e3bbfeda3e3f421eedb3d673cd45a7f3c5ce52b4a2fd4
SSDEEP

768:boq0GnILSC+e+biNtelDSN+iV08YbygeXFa3ZzvEgK/JDZVc6KN:cqTyNtKDs4zb18eZznkJDZVclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

tax-sri.gl.at.ply.gg:5353

tax-sri.gl.at.ply.gg:9388

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
..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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\..exe	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

Processes:

Client.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation Client.exe
Executes dropped EXE 1 IoCs

Processes:

..exe

pid process

2944 ..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

Processes:

timeout.exe

pid process

1628 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

Processes:

schtasks.exe

pid process

1488 schtasks.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Client.exe

pid	process
2944	..exe

pid	process
1628	timeout.exe

pid	process
1488	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

Client.exe

pid	process
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe
2356	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client.exe..exe

description pid process

Token: SeDebugPrivilege 2356 Client.exe
Token: SeDebugPrivilege 2944 ..exe

description	pid	process
Token: SeDebugPrivilege	2356	Client.exe
Token: SeDebugPrivilege	2944	..exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

Client.execmd.execmd.exe

description	pid	process	target process
PID 2356 wrote to memory of 1216	2356	Client.exe	cmd.exe
PID 2356 wrote to memory of 1216	2356	Client.exe	cmd.exe
PID 2356 wrote to memory of 2928	2356	Client.exe	cmd.exe
PID 2356 wrote to memory of 2928	2356	Client.exe	cmd.exe
PID 1216 wrote to memory of 1488	1216	cmd.exe	schtasks.exe
PID 1216 wrote to memory of 1488	1216	cmd.exe	schtasks.exe
PID 2928 wrote to memory of 1628	2928	cmd.exe	timeout.exe
PID 2928 wrote to memory of 1628	2928	cmd.exe	timeout.exe
PID 2928 wrote to memory of 2944	2928	cmd.exe	..exe
PID 2928 wrote to memory of 2944	2928	cmd.exe	..exe

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.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2356
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "." /tr '"C:\Users\Admin\AppData\Roaming\..exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1216
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "." /tr '"C:\Users\Admin\AppData\Roaming\..exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1488
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp85F9.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2928
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1628
- - C:\Users\Admin\AppData\Roaming\..exe
    "C:\Users\Admin\AppData\Roaming\..exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2944

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

2

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\tmp85F9.tmp.bat

Filesize
145B

MD5
ae8f199270aab6e675c43ef9537f5a4f

SHA1
a1b819ddb4292369e3aee2e5a9805aa742eae017

SHA256
84da7d0414a413ea35e47834283e90b1bc94d26af3503d11d60206323cf0e979

SHA512
6577a454334028f5db0098d23da67a1bb71104da45894ec17afac661144977e3961bf2174acc96ec4525555de55bc1c9dbf50746ae73d22e54a63d22b140a5cd

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

Filesize
47KB

MD5
8a0bb8ae35abf7a92325e632a5a3adc0

SHA1
0042da0ec0b6f9c32a06becc845e0591870e410c

SHA256
8ef32b44cf21b690415e603eb6889c8c2e9294e76028b9dbd4c20a23077167f8

SHA512
ef89ad0def338bfab7e8fe435b1c964e62c56d0589721dda750e72b861492c6bccef7be95190b9df974e3bbfeda3e3f421eedb3d673cd45a7f3c5ce52b4a2fd4

Download Submit
memory/2356-0-0x00007FFEFB173000-0x00007FFEFB175000-memory.dmp

Filesize
8KB

Download
memory/2356-1-0x0000000000780000-0x0000000000792000-memory.dmp

Filesize
72KB

Download
memory/2356-2-0x00007FFEFB170000-0x00007FFEFBC31000-memory.dmp

Filesize
10.8MB

Download
memory/2356-7-0x00007FFEFB170000-0x00007FFEFBC31000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads