asyncrat | 01ffe9d6f323a1dafd7dbe75338596cb03cdbe970cdc964543ae03006c1ece85

Analysis

max time kernel
57s
max time network
63s
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, 19:00

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General

Target

1f2f39600815db1ee39333ed0b8df3ac2850e3e5aed5277635655b95cdd06ff5.exe
Size

108KB
MD5

5116a3041a749db103222aa33a273466
SHA1

b995231d04244af56f613e5e1e33cccb92ff4d4e
SHA256

1f2f39600815db1ee39333ed0b8df3ac2850e3e5aed5277635655b95cdd06ff5
SHA512

027fc7751bfb8a08f597b1f7c782cbcf48e9ed2343baf88ff8db3e8ddb6d6b9d25869d312c525cb7b69dac295eafed7a9806946f65b06cc131afffa75339dd1d
SSDEEP

3072:wsxVbOH15pDkIJSj5at2CZEak1qcfkZkPqib1AxD2AXSn3:wsvbwrpDksSj5at2AEak1qcsePqib1si

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:3230

Attributes

delay
1
install
true
install_file
Serial_checker.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
behavioral24/files/0x00050000000229c8-7.dat	family_asyncrat

Checks computer location settings 2 TTPs 2 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-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation	1f2f39600815db1ee39333ed0b8df3ac2850e3e5aed5277635655b95cdd06ff5.exe
Key value queried	\REGISTRY\USER\S-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation	Spoof.exe

Executes dropped EXE 2 IoCs

pid	Process
4876	Spoof.exe
4764	Serial_checker.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1f2f39600815db1ee39333ed0b8df3ac2850e3e5aed5277635655b95cdd06ff5.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4828	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
4808	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe
4876	Spoof.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4876	Spoof.exe
Token: SeDebugPrivilege	4764	Serial_checker.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5568 wrote to memory of 4876	5568	1f2f39600815db1ee39333ed0b8df3ac2850e3e5aed5277635655b95cdd06ff5.exe	86
PID 5568 wrote to memory of 4876	5568	1f2f39600815db1ee39333ed0b8df3ac2850e3e5aed5277635655b95cdd06ff5.exe	86
PID 4876 wrote to memory of 2408	4876	Spoof.exe	88
PID 4876 wrote to memory of 2408	4876	Spoof.exe	88
PID 4876 wrote to memory of 4708	4876	Spoof.exe	90
PID 4876 wrote to memory of 4708	4876	Spoof.exe	90
PID 4708 wrote to memory of 4828	4708	cmd.exe	92
PID 4708 wrote to memory of 4828	4708	cmd.exe	92
PID 2408 wrote to memory of 4808	2408	cmd.exe	93
PID 2408 wrote to memory of 4808	2408	cmd.exe	93
PID 4708 wrote to memory of 4764	4708	cmd.exe	94
PID 4708 wrote to memory of 4764	4708	cmd.exe	94

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\1f2f39600815db1ee39333ed0b8df3ac2850e3e5aed5277635655b95cdd06ff5.exe
"C:\Users\Admin\AppData\Local\Temp\1f2f39600815db1ee39333ed0b8df3ac2850e3e5aed5277635655b95cdd06ff5.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5568
- C:\Users\Admin\AppData\Local\Temp\Spoof.exe
  "C:\Users\Admin\AppData\Local\Temp\Spoof.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4876
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Serial_checker" /tr '"C:\Users\Admin\AppData\Roaming\Serial_checker.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2408
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Serial_checker" /tr '"C:\Users\Admin\AppData\Roaming\Serial_checker.exe"'
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4808
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6D9E.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4708
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:4828
  - - C:\Users\Admin\AppData\Roaming\Serial_checker.exe
      "C:\Users\Admin\AppData\Roaming\Serial_checker.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:4764

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Spoof.exe

Filesize
63KB

MD5
a340d849cc988d5d06f7e30143d62c86

SHA1
3bf172f21f8291c408e34ec8cedb2aa3db55861a

SHA256
0ec25e2bfb539e7fd9445ea617597e6e6d64f8c49c54f105091fc0763cc154b4

SHA512
96abc6657b576bddd6bc46d7344dc2d033cd120e8b7a569c7949f98251c7b688274f747a94f978d3d06130d9ae9fc3c72e88b265fb85be2093029d06580a2baa

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp6D9E.tmp.bat

Filesize
158B

MD5
3969144697c990f31365826eca53b67c

SHA1
61f99cf7a97c9dbffa73d4f8676d2f09a412904b

SHA256
e990dab546bb1692c58f7f4ee70ba1645f2541630c9d30c8b6119f617386ec8e

SHA512
828234f3decb62a1a0d32feaa1be32fd720f13b1cdfb9cc27a604f440ca149335821e2c1bb8c0d9b802776fd994cc781c55502966eb67c57fb66474846ee5dc5

Download Submit
memory/4876-16-0x00007FFF25663000-0x00007FFF25665000-memory.dmp

Filesize
8KB

Download
memory/4876-15-0x00000000004A0000-0x00000000004B6000-memory.dmp

Filesize
88KB

Download
memory/4876-18-0x00007FFF25660000-0x00007FFF26121000-memory.dmp

Filesize
10.8MB

Download
memory/4876-23-0x00007FFF25660000-0x00007FFF26121000-memory.dmp

Filesize
10.8MB

Download
memory/5568-0-0x00000000747E2000-0x00000000747E3000-memory.dmp

Filesize
4KB

Download
memory/5568-1-0x00000000747E0000-0x0000000074D91000-memory.dmp

Filesize
5.7MB

Download
memory/5568-2-0x00000000747E0000-0x0000000074D91000-memory.dmp

Filesize
5.7MB

Download
memory/5568-17-0x00000000747E0000-0x0000000074D91000-memory.dmp

Filesize
5.7MB

Download