asyncrat | 01ffe9d6f323a1dafd7dbe75338596cb03cdbe970cdc964543ae03006c1ece85

Analysis

max time kernel
39s
max time network
51s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 19:00

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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
2600	calc.exe
276	calc.exe

Loads dropped DLL 1 IoCs

pid	Process
2604	cmd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2120 set thread context of 2812	2120	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 2600 set thread context of 276	2600	calc.exe	38

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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2580	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
2568	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe
Token: SeDebugPrivilege	276	calc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 2120 wrote to memory of 2812	2120	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 2120 wrote to memory of 2812	2120	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 2120 wrote to memory of 2812	2120	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 2120 wrote to memory of 2812	2120	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 2120 wrote to memory of 2812	2120	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 2120 wrote to memory of 2812	2120	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 2120 wrote to memory of 2812	2120	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 2120 wrote to memory of 2812	2120	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 2120 wrote to memory of 2812	2120	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	30
PID 2812 wrote to memory of 2828	2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 2812 wrote to memory of 2828	2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 2812 wrote to memory of 2828	2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 2812 wrote to memory of 2828	2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	31
PID 2812 wrote to memory of 2604	2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 2812 wrote to memory of 2604	2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 2812 wrote to memory of 2604	2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 2812 wrote to memory of 2604	2812	1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c.exe	33
PID 2828 wrote to memory of 2568	2828	cmd.exe	35
PID 2828 wrote to memory of 2568	2828	cmd.exe	35
PID 2828 wrote to memory of 2568	2828	cmd.exe	35
PID 2828 wrote to memory of 2568	2828	cmd.exe	35
PID 2604 wrote to memory of 2580	2604	cmd.exe	36
PID 2604 wrote to memory of 2580	2604	cmd.exe	36
PID 2604 wrote to memory of 2580	2604	cmd.exe	36
PID 2604 wrote to memory of 2580	2604	cmd.exe	36
PID 2604 wrote to memory of 2600	2604	cmd.exe	37
PID 2604 wrote to memory of 2600	2604	cmd.exe	37
PID 2604 wrote to memory of 2600	2604	cmd.exe	37
PID 2604 wrote to memory of 2600	2604	cmd.exe	37
PID 2600 wrote to memory of 276	2600	calc.exe	38
PID 2600 wrote to memory of 276	2600	calc.exe	38
PID 2600 wrote to memory of 276	2600	calc.exe	38
PID 2600 wrote to memory of 276	2600	calc.exe	38
PID 2600 wrote to memory of 276	2600	calc.exe	38
PID 2600 wrote to memory of 276	2600	calc.exe	38
PID 2600 wrote to memory of 276	2600	calc.exe	38
PID 2600 wrote to memory of 276	2600	calc.exe	38
PID 2600 wrote to memory of 276	2600	calc.exe	38

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:2120
- 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:2812
- - 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:2828
  - - 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:2568
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp14E8.tmp.bat""
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2604
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:2580
  - - 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:2600
    - - 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:276

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp14E8.tmp.bat

Filesize
148B

MD5
e2fa9dc1ea502dc35515899819f12858

SHA1
4b965519952d77a8166ba884da5764991f5484ab

SHA256
76b586cf693f261794ee4b6053c524d68c4081e90e599d9188a024a33f26ff8b

SHA512
4bff414f69ce0e5eb68cf43c159b9cbff7c19a247be026ca39291e3a682949bdd202d736e01760d1f3c521a70a401c074eff0a7f1689a15d9d5f5587100a0124

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

Filesize
98KB

MD5
e207c28adc3d625a47386442ce55f467

SHA1
faa588ea6b738213db2e74243d8c273ea7cb958e

SHA256
1d90d6c35e9237c9b00a3c2b3e7ff1d0cfe709efdf26f5665743ec2533645f9c

SHA512
2b6dd4e96d5b807967ae8650419591780a5ad4654f62af98478d248c2e5ef3c54dac260cd1fbf54109b1a2f2ed1ddee8fc2a4884da56f38e862d3fb89645a41d

Download Submit
memory/276-40-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/276-43-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/276-44-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2120-0-0x0000000074E1E000-0x0000000074E1F000-memory.dmp

Filesize
4KB

Download
memory/2120-1-0x0000000000380000-0x000000000039E000-memory.dmp

Filesize
120KB

Download
memory/2120-2-0x00000000003C0000-0x00000000003D2000-memory.dmp

Filesize
72KB

Download
memory/2120-15-0x0000000074E10000-0x00000000754FE000-memory.dmp

Filesize
6.9MB

Download
memory/2600-31-0x00000000008E0000-0x00000000008FE000-memory.dmp

Filesize
120KB

Download
memory/2812-14-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2812-16-0x0000000074E10000-0x00000000754FE000-memory.dmp

Filesize
6.9MB

Download
memory/2812-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2812-17-0x0000000074E10000-0x00000000754FE000-memory.dmp

Filesize
6.9MB

Download
memory/2812-4-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2812-26-0x0000000074E10000-0x00000000754FE000-memory.dmp

Filesize
6.9MB

Download
memory/2812-5-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2812-6-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2812-7-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2812-9-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2812-3-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download