asyncrat | 1763700355c9a6a137f72badfbf615c10b16c6b3313b36efd8ba8fc1ea7d3574

General

Target

Loader.exe
Size

47KB
MD5

ad44130f8f42acf617c47f83717e1b58
SHA1

b74238ba25a96abfe889d92547d42712da39635e
SHA256

1763700355c9a6a137f72badfbf615c10b16c6b3313b36efd8ba8fc1ea7d3574
SHA512

74966ed6542d3f62f0b2950bd8bebd8f763b939a5f114adfaf5e4f7986047c4ffdc52e88999913ccbbfa34999e32c76e3c3e6a358806f7738b8586e464fa63c1
SSDEEP

768:MuyxNTAoZjRWUJd9bmo2qLzhSTZxvErdPIiwvaLnebAw//FPACqT54KNTUTBDZ4x:MuyxNTAGL2soZxvjiwSjebR9xq44Y1dq

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

kingdom-spent.gl.at.ply.gg:25651

Mutex

mBCDHgobepxm

Attributes

delay
3
install
true
install_file
Windows.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
behavioral1/files/0x000b000000023b7b-11.dat	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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	Loader.exe

Executes dropped EXE 1 IoCs

pid	Process
2616	Windows.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 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	Windows.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Loader.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

evasion

pid	Process
4364	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
4912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
4080	Loader.exe
2616	Windows.exe
2616	Windows.exe
2616	Windows.exe
2616	Windows.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4080	Loader.exe
Token: SeDebugPrivilege	2616	Windows.exe
Token: SeDebugPrivilege	2616	Windows.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4080 wrote to memory of 844	4080	Loader.exe	84
PID 4080 wrote to memory of 844	4080	Loader.exe	84
PID 4080 wrote to memory of 844	4080	Loader.exe	84
PID 4080 wrote to memory of 4844	4080	Loader.exe	86
PID 4080 wrote to memory of 4844	4080	Loader.exe	86
PID 4080 wrote to memory of 4844	4080	Loader.exe	86
PID 4844 wrote to memory of 4364	4844	cmd.exe	88
PID 4844 wrote to memory of 4364	4844	cmd.exe	88
PID 4844 wrote to memory of 4364	4844	cmd.exe	88
PID 844 wrote to memory of 4912	844	cmd.exe	89
PID 844 wrote to memory of 4912	844	cmd.exe	89
PID 844 wrote to memory of 4912	844	cmd.exe	89
PID 4844 wrote to memory of 2616	4844	cmd.exe	90
PID 4844 wrote to memory of 2616	4844	cmd.exe	90
PID 4844 wrote to memory of 2616	4844	cmd.exe	90
PID 2616 wrote to memory of 5032	2616	Windows.exe	110
PID 2616 wrote to memory of 5032	2616	Windows.exe	110
PID 2616 wrote to memory of 5032	2616	Windows.exe	110
PID 5032 wrote to memory of 3044	5032	cmd.exe	112
PID 5032 wrote to memory of 3044	5032	cmd.exe	112
PID 5032 wrote to memory of 3044	5032	cmd.exe	112

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4080
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows" /tr '"C:\Users\Admin\AppData\Roaming\Windows.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:844
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Windows" /tr '"C:\Users\Admin\AppData\Roaming\Windows.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4912
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpADC4.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4844
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4364
- - C:\Users\Admin\AppData\Roaming\Windows.exe
    "C:\Users\Admin\AppData\Roaming\Windows.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2616
  - - C:\Windows\SysWOW64\cmd.exe
      "cmd"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:5032
    - - C:\Windows\SysWOW64\notepad.exe
        
        notepad
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:3044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpADC4.tmp.bat

Filesize
151B

MD5
38c4f4846b9d4bbf97ce7525abf31c48

SHA1
cb2cb51b5ec0a38ac898bcf72e2234977a20c9ec

SHA256
ec41a9dcb40d01908efef2b964f70a18fbaa0fd6ef9da7e4360302cad99caae5

SHA512
1d0437897d844204e889ece98a7ee2a298032e1b8adf49437bfc2a92c5734a24cc005aa21f4168a3bfa7c5dd88f9e2f319ff7e58214385521a6e0120c4400c5d

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

Filesize
47KB

MD5
ad44130f8f42acf617c47f83717e1b58

SHA1
b74238ba25a96abfe889d92547d42712da39635e

SHA256
1763700355c9a6a137f72badfbf615c10b16c6b3313b36efd8ba8fc1ea7d3574

SHA512
74966ed6542d3f62f0b2950bd8bebd8f763b939a5f114adfaf5e4f7986047c4ffdc52e88999913ccbbfa34999e32c76e3c3e6a358806f7738b8586e464fa63c1

Download Submit
memory/2616-20-0x00000000062D0000-0x0000000006338000-memory.dmp

Filesize
416KB

Download
memory/2616-19-0x0000000006350000-0x00000000063C6000-memory.dmp

Filesize
472KB

Download
memory/2616-23-0x0000000000980000-0x0000000000A12000-memory.dmp

Filesize
584KB

Download
memory/2616-22-0x0000000006800000-0x0000000006892000-memory.dmp

Filesize
584KB

Download
memory/2616-21-0x0000000006430000-0x000000000644E000-memory.dmp

Filesize
120KB

Download
memory/2616-13-0x0000000074FD0000-0x0000000075780000-memory.dmp

Filesize
7.7MB

Download
memory/2616-16-0x0000000005A20000-0x0000000005FC4000-memory.dmp

Filesize
5.6MB

Download
memory/2616-17-0x00000000051C0000-0x0000000005226000-memory.dmp

Filesize
408KB

Download
memory/2616-18-0x0000000074FD0000-0x0000000075780000-memory.dmp

Filesize
7.7MB

Download
memory/4080-1-0x0000000000F30000-0x0000000000F42000-memory.dmp

Filesize
72KB

Download
memory/4080-0-0x000000007508E000-0x000000007508F000-memory.dmp

Filesize
4KB

Download
memory/4080-3-0x0000000005990000-0x0000000005A2C000-memory.dmp

Filesize
624KB

Download
memory/4080-2-0x0000000075080000-0x0000000075830000-memory.dmp

Filesize
7.7MB

Download
memory/4080-8-0x0000000075080000-0x0000000075830000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads