asyncrat | 01ffe9d6f323a1dafd7dbe75338596cb03cdbe970cdc964543ae03006c1ece85

Analysis

max time kernel
38s
max time network
51s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-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

Executes dropped EXE 3 IoCs

pid	Process
2800	calc.exe
2628	calc.exe
2640	calc.exe

Loads dropped DLL 1 IoCs

pid	Process
1948	cmd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 576 set thread context of 1656	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 2800 set thread context of 2640	2800	calc.exe	41

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	cmd.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	timeout.exe
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	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2820	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
2868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
2800	calc.exe
2800	calc.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
Token: SeDebugPrivilege	1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
Token: SeDebugPrivilege	2800	calc.exe
Token: SeDebugPrivilege	2640	calc.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 576 wrote to memory of 2216	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 576 wrote to memory of 2216	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 576 wrote to memory of 2216	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 576 wrote to memory of 2216	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 576 wrote to memory of 1656	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 576 wrote to memory of 1656	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 576 wrote to memory of 1656	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 576 wrote to memory of 1656	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 576 wrote to memory of 1656	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 576 wrote to memory of 1656	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 576 wrote to memory of 1656	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 576 wrote to memory of 1656	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 576 wrote to memory of 1656	576	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 1656 wrote to memory of 2884	1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 1656 wrote to memory of 2884	1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 1656 wrote to memory of 2884	1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 1656 wrote to memory of 2884	1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 1656 wrote to memory of 1948	1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	35
PID 1656 wrote to memory of 1948	1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	35
PID 1656 wrote to memory of 1948	1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	35
PID 1656 wrote to memory of 1948	1656	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	35
PID 2884 wrote to memory of 2868	2884	cmd.exe	37
PID 2884 wrote to memory of 2868	2884	cmd.exe	37
PID 2884 wrote to memory of 2868	2884	cmd.exe	37
PID 2884 wrote to memory of 2868	2884	cmd.exe	37
PID 1948 wrote to memory of 2820	1948	cmd.exe	38
PID 1948 wrote to memory of 2820	1948	cmd.exe	38
PID 1948 wrote to memory of 2820	1948	cmd.exe	38
PID 1948 wrote to memory of 2820	1948	cmd.exe	38
PID 1948 wrote to memory of 2800	1948	cmd.exe	39
PID 1948 wrote to memory of 2800	1948	cmd.exe	39
PID 1948 wrote to memory of 2800	1948	cmd.exe	39
PID 1948 wrote to memory of 2800	1948	cmd.exe	39
PID 2800 wrote to memory of 2628	2800	calc.exe	40
PID 2800 wrote to memory of 2628	2800	calc.exe	40
PID 2800 wrote to memory of 2628	2800	calc.exe	40
PID 2800 wrote to memory of 2628	2800	calc.exe	40
PID 2800 wrote to memory of 2640	2800	calc.exe	41
PID 2800 wrote to memory of 2640	2800	calc.exe	41
PID 2800 wrote to memory of 2640	2800	calc.exe	41
PID 2800 wrote to memory of 2640	2800	calc.exe	41
PID 2800 wrote to memory of 2640	2800	calc.exe	41
PID 2800 wrote to memory of 2640	2800	calc.exe	41
PID 2800 wrote to memory of 2640	2800	calc.exe	41
PID 2800 wrote to memory of 2640	2800	calc.exe	41
PID 2800 wrote to memory of 2640	2800	calc.exe	41

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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:576
- C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
  "C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe"
  2⤵
  PID:2216
- C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
  "C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1656
- - 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:2884
  - - 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:2868
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpEF5E.tmp.bat""
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1948
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:2820
  - - 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:2800
    - - C:\Users\Admin\AppData\Roaming\calc.exe
        
        "C:\Users\Admin\AppData\Roaming\calc.exe"
        5⤵
        Executes dropped EXE
        
        PID:2628
    - - 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:2640

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

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\Temp\tmpEF5E.tmp.bat

Filesize
148B

MD5
dfd2a547c334409cbd1487053662b5a7

SHA1
3992fdd90f9992dcafb91eceff8fb769d7985f87

SHA256
89032fce598a7ba77f1d9fffdc041ed2d798d4e5facf9b5aa0e1551534ff5e92

SHA512
01fe0a4ba86c88a1d609bfbd38c94d60b30e3ea32da5e70a20d09b66d9e16d87be791c4d80d339258f962254183466f97ca89a7e83253e7077345cf1f6e3b261

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

Filesize
98KB

MD5
e207c28adc3d625a47386442ce55f467

SHA1
faa588ea6b738213db2e74243d8c273ea7cb958e

SHA256
1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c

SHA512
2b6dd4e96d5b807967ae8650419591780a5ad4654f62af98478d248c2e5ef3c54dac260cd1fbf54109b1a2f2ed1ddee8fc2a4884da56f38e862d3fb89645a41d

Download Submit
memory/576-0-0x000000007468E000-0x000000007468F000-memory.dmp

Filesize
4KB

Download
memory/576-1-0x00000000001F0000-0x000000000020E000-memory.dmp

Filesize
120KB

Download
memory/576-2-0x0000000000330000-0x0000000000342000-memory.dmp

Filesize
72KB

Download
memory/576-14-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/576-46-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/1656-5-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1656-15-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1656-6-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1656-9-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1656-4-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1656-3-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1656-17-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/1656-7-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/1656-27-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/1656-16-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/1656-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2640-41-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2640-45-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2640-44-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2800-31-0x0000000000150000-0x000000000016E000-memory.dmp

Filesize
120KB

Download