asyncrat | 01ffe9d6f323a1dafd7dbe75338596cb03cdbe970cdc964543ae03006c1ece85

Analysis

max time kernel
144s
max time network
151s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 19:06

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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 2 IoCs

pid	Process
2736	calc.exe
2092	calc.exe

Loads dropped DLL 1 IoCs

pid	Process
3068	cmd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3024 set thread context of 2000	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 2736 set thread context of 2092	2736	calc.exe	40

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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2872	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
2880	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
Token: SeDebugPrivilege	2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
Token: SeDebugPrivilege	2092	calc.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 3024 wrote to memory of 2800	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 3024 wrote to memory of 2800	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 3024 wrote to memory of 2800	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 3024 wrote to memory of 2800	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 3024 wrote to memory of 2180	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 3024 wrote to memory of 2180	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 3024 wrote to memory of 2180	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 3024 wrote to memory of 2180	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 3024 wrote to memory of 2000	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 3024 wrote to memory of 2000	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 3024 wrote to memory of 2000	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 3024 wrote to memory of 2000	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 3024 wrote to memory of 2000	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 3024 wrote to memory of 2000	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 3024 wrote to memory of 2000	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 3024 wrote to memory of 2000	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 3024 wrote to memory of 2000	3024	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	32
PID 2000 wrote to memory of 3016	2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 2000 wrote to memory of 3016	2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 2000 wrote to memory of 3016	2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 2000 wrote to memory of 3016	2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 2000 wrote to memory of 3068	2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	35
PID 2000 wrote to memory of 3068	2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	35
PID 2000 wrote to memory of 3068	2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	35
PID 2000 wrote to memory of 3068	2000	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	35
PID 3016 wrote to memory of 2880	3016	cmd.exe	37
PID 3016 wrote to memory of 2880	3016	cmd.exe	37
PID 3016 wrote to memory of 2880	3016	cmd.exe	37
PID 3016 wrote to memory of 2880	3016	cmd.exe	37
PID 3068 wrote to memory of 2872	3068	cmd.exe	38
PID 3068 wrote to memory of 2872	3068	cmd.exe	38
PID 3068 wrote to memory of 2872	3068	cmd.exe	38
PID 3068 wrote to memory of 2872	3068	cmd.exe	38
PID 3068 wrote to memory of 2736	3068	cmd.exe	39
PID 3068 wrote to memory of 2736	3068	cmd.exe	39
PID 3068 wrote to memory of 2736	3068	cmd.exe	39
PID 3068 wrote to memory of 2736	3068	cmd.exe	39
PID 2736 wrote to memory of 2092	2736	calc.exe	40
PID 2736 wrote to memory of 2092	2736	calc.exe	40
PID 2736 wrote to memory of 2092	2736	calc.exe	40
PID 2736 wrote to memory of 2092	2736	calc.exe	40
PID 2736 wrote to memory of 2092	2736	calc.exe	40
PID 2736 wrote to memory of 2092	2736	calc.exe	40
PID 2736 wrote to memory of 2092	2736	calc.exe	40
PID 2736 wrote to memory of 2092	2736	calc.exe	40
PID 2736 wrote to memory of 2092	2736	calc.exe	40

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:3024
- C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
  "C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe"
  2⤵
  PID:2800
- C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
  "C:\Users\Admin\AppData\Local\Temp\1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe"
  2⤵
  PID:2180
- 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:2000
- - 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:3016
  - - 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:2880
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp98B7.tmp.bat""
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3068
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:2872
  - - 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 use of WriteProcessMemory
      PID:2736
    - - 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:2092

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\tmp98B7.tmp.bat

Filesize
148B

MD5
0780163953e6b30796898d381b9b7a29

SHA1
3fdfd1449182815d35659fa49a68cea9011baf91

SHA256
0e95e077b3565931f3b9fca8a6093726b1443f07f7715cb755c5ae2cf35e0a64

SHA512
1aab92537c9bffe6e27cc770e4008b927edda8380a2f32bf919e05ede85b6631d5a8a42e790e4c551901ce43984bdc740673cc123f50edbbe5ce3aedb751746b

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

Filesize
98KB

MD5
e207c28adc3d625a47386442ce55f467

SHA1
faa588ea6b738213db2e74243d8c273ea7cb958e

SHA256
1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c

SHA512
2b6dd4e96d5b807967ae8650419591780a5ad4654f62af98478d248c2e5ef3c54dac260cd1fbf54109b1a2f2ed1ddee8fc2a4884da56f38e862d3fb89645a41d

Download Submit
memory/2000-9-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2000-31-0x0000000073DB0000-0x000000007449E000-memory.dmp

Filesize
6.9MB

Download
memory/2000-15-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2000-19-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2000-20-0x0000000073DB0000-0x000000007449E000-memory.dmp

Filesize
6.9MB

Download
memory/2000-3-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2000-13-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2000-11-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2000-21-0x0000000073DB0000-0x000000007449E000-memory.dmp

Filesize
6.9MB

Download
memory/2000-7-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2000-5-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2092-44-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2092-49-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2092-47-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2736-35-0x0000000000910000-0x000000000092E000-memory.dmp

Filesize
120KB

Download
memory/3024-0-0x0000000073DBE000-0x0000000073DBF000-memory.dmp

Filesize
4KB

Download
memory/3024-2-0x0000000000380000-0x0000000000392000-memory.dmp

Filesize
72KB

Download
memory/3024-18-0x0000000073DB0000-0x000000007449E000-memory.dmp

Filesize
6.9MB

Download
memory/3024-1-0x0000000001170000-0x000000000118E000-memory.dmp

Filesize
120KB

Download
memory/3024-50-0x0000000073DB0000-0x000000007449E000-memory.dmp

Filesize
6.9MB

Download