asyncrat | 01ffe9d6f323a1dafd7dbe75338596cb03cdbe970cdc964543ae03006c1ece85

Analysis

max time kernel
38s
max time network
57s
platform
windows10-2004_x64
resource
win10v2004-20250313-en
resource tags

arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 20:33

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General

Target

1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
Size

98KB
MD5

e207c28adc3d625a47386442ce55f467
SHA1

faa588ea6b738213db2e74243d8c273ea7cb958e
SHA256

1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c
SHA512

2b6dd4e96d5b807967ae8650419591780a5ad4654f62af98478d248c2e5ef3c54dac260cd1fbf54109b1a2f2ed1ddee8fc2a4884da56f38e862d3fb89645a41d
SSDEEP

1536:Mfk6WICgBTnkJbO6JIhecX8zdZt7OpjDcvNkOV:cZWS7kWhvX8ZZt7qcvNrV

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

valerianobritoieufsasd.duckdns.org:5023

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
calc.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

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-1-5-21-3446877943-4095308722-756223633-1000\Control Panel\International\Geo\Nation	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe

Executes dropped EXE 3 IoCs

pid	Process
6112	calc.exe
5492	calc.exe
368	calc.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4276 set thread context of 4400	4276	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	88
PID 6112 set thread context of 368	6112	calc.exe	104

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 8 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	calc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	calc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
920	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
2412	schtasks.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
6112	calc.exe
6112	calc.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
Token: SeDebugPrivilege	6112	calc.exe
Token: SeDebugPrivilege	368	calc.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 4276 wrote to memory of 4400	4276	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	88
PID 4276 wrote to memory of 4400	4276	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	88
PID 4276 wrote to memory of 4400	4276	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	88
PID 4276 wrote to memory of 4400	4276	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	88
PID 4276 wrote to memory of 4400	4276	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	88
PID 4276 wrote to memory of 4400	4276	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	88
PID 4276 wrote to memory of 4400	4276	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	88
PID 4276 wrote to memory of 4400	4276	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	88
PID 4400 wrote to memory of 4328	4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	93
PID 4400 wrote to memory of 4328	4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	93
PID 4400 wrote to memory of 4328	4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	93
PID 4400 wrote to memory of 5092	4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	95
PID 4400 wrote to memory of 5092	4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	95
PID 4400 wrote to memory of 5092	4400	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	95
PID 4328 wrote to memory of 2412	4328	cmd.exe	97
PID 4328 wrote to memory of 2412	4328	cmd.exe	97
PID 4328 wrote to memory of 2412	4328	cmd.exe	97
PID 5092 wrote to memory of 920	5092	cmd.exe	98
PID 5092 wrote to memory of 920	5092	cmd.exe	98
PID 5092 wrote to memory of 920	5092	cmd.exe	98
PID 5092 wrote to memory of 6112	5092	cmd.exe	102
PID 5092 wrote to memory of 6112	5092	cmd.exe	102
PID 5092 wrote to memory of 6112	5092	cmd.exe	102
PID 6112 wrote to memory of 5492	6112	calc.exe	103
PID 6112 wrote to memory of 5492	6112	calc.exe	103
PID 6112 wrote to memory of 5492	6112	calc.exe	103
PID 6112 wrote to memory of 368	6112	calc.exe	104
PID 6112 wrote to memory of 368	6112	calc.exe	104
PID 6112 wrote to memory of 368	6112	calc.exe	104
PID 6112 wrote to memory of 368	6112	calc.exe	104
PID 6112 wrote to memory of 368	6112	calc.exe	104
PID 6112 wrote to memory of 368	6112	calc.exe	104
PID 6112 wrote to memory of 368	6112	calc.exe	104
PID 6112 wrote to memory of 368	6112	calc.exe	104

C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
"C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4276
- C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
  "C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4400
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "calc" /tr '"C:\Users\Admin\AppData\Roaming\calc.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4328
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "calc" /tr '"C:\Users\Admin\AppData\Roaming\calc.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2412
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp85E9.tmp.bat""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:5092
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:920
  - - C:\Users\Admin\AppData\Roaming\calc.exe
      "C:\Users\Admin\AppData\Roaming\calc.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:6112
    - - C:\Users\Admin\AppData\Roaming\calc.exe
        
        "C:\Users\Admin\AppData\Roaming\calc.exe"
        5⤵
        Executes dropped EXE
        
        PID:5492
    - - C:\Users\Admin\AppData\Roaming\calc.exe
        
        "C:\Users\Admin\AppData\Roaming\calc.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:368

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe.log

Filesize
418B

MD5
2f51ee33b74ab710e289b65a7b580c9b

SHA1
031f919473e89c4a463360c7a898fda986836470

SHA256
bdb480893a7d1acc95b67f49dd12a0c1f69b75d1908536d0cc1350ebfbb5cc58

SHA512
927bd82da2cc751b6b2c97efc33019b8977f2d78d467b363cf609e27a3ac8986e0b4c3b4d025be9fe87f50db51285b115b97ae7d0ae642daae2910d44ad9ec5a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp85E9.tmp.bat

Filesize
148B

MD5
3edeba0f88beab538e8eda58014cd765

SHA1
8184a6348f7d6d91f43ad813f11a978b5872c5cd

SHA256
59be36a16f421466acfc43c0f80e9739e19cc260fe4d95fe570d398ada1d1381

SHA512
423acbdbf3dab143b02d162adf1f69b1074b6a69c8a5003115b592757ac3cd0659bd82a6901d59b8494dc2394fde9e57dfaf87c5a2e03d393df8fe01939a707a

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

Filesize
98KB

MD5
e207c28adc3d625a47386442ce55f467

SHA1
faa588ea6b738213db2e74243d8c273ea7cb958e

SHA256
1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c

SHA512
2b6dd4e96d5b807967ae8650419591780a5ad4654f62af98478d248c2e5ef3c54dac260cd1fbf54109b1a2f2ed1ddee8fc2a4884da56f38e862d3fb89645a41d

Download Submit
memory/4276-6-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/4276-4-0x0000000003330000-0x0000000003342000-memory.dmp

Filesize
72KB

Download
memory/4276-0-0x00000000745EE000-0x00000000745EF000-memory.dmp

Filesize
4KB

Download
memory/4276-3-0x00000000057C0000-0x000000000585C000-memory.dmp

Filesize
624KB

Download
memory/4276-2-0x0000000005D70000-0x0000000006314000-memory.dmp

Filesize
5.6MB

Download
memory/4276-1-0x0000000000D30000-0x0000000000D4E000-memory.dmp

Filesize
120KB

Download
memory/4276-25-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/4400-5-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4400-9-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/4400-10-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/4400-15-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/6112-19-0x0000000002420000-0x0000000002432000-memory.dmp

Filesize
72KB

Download