asyncrat | 165289612527e1bfad340f7675a701bfe9608a3a4cfbfefe6a662574d5c05f90

General

Target

tool.exe
Size

45KB
MD5

b84e27e5b6cef684af80c868bf0b4ba0
SHA1

213d29cc30c693675911547643112d4c9a6c02d2
SHA256

165289612527e1bfad340f7675a701bfe9608a3a4cfbfefe6a662574d5c05f90
SHA512

3d5fb00a3793174b8f98e972c9ed7f322d1333dbda79a00676d015532e63eb69449453eda3d7e7de4d3026b49f3816ae4a12c4a2e434893d5aee52d9a3d00813
SSDEEP

768:7ugPNTjgkH7F7WUHw9pmo2q7Z0R3+418iZPIXzjbag13ibiWzqrLyXDkZBgkBDZg:7ugPNTcI42B3OiWX3bN1S2UwOzkZCSdg

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Tool.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/0x000d000000012263-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2676	Tool.exe

Loads dropped DLL 1 IoCs

pid	Process
2700	cmd.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 6 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	tool.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Tool.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2172	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 3 IoCs

pid	Process
2908	tool.exe
2908	tool.exe
2908	tool.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2908	tool.exe
Token: SeDebugPrivilege	2676	Tool.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2908 wrote to memory of 2900	2908	tool.exe	30
PID 2908 wrote to memory of 2900	2908	tool.exe	30
PID 2908 wrote to memory of 2900	2908	tool.exe	30
PID 2908 wrote to memory of 2900	2908	tool.exe	30
PID 2908 wrote to memory of 2700	2908	tool.exe	32
PID 2908 wrote to memory of 2700	2908	tool.exe	32
PID 2908 wrote to memory of 2700	2908	tool.exe	32
PID 2908 wrote to memory of 2700	2908	tool.exe	32
PID 2700 wrote to memory of 2172	2700	cmd.exe	34
PID 2700 wrote to memory of 2172	2700	cmd.exe	34
PID 2700 wrote to memory of 2172	2700	cmd.exe	34
PID 2700 wrote to memory of 2172	2700	cmd.exe	34
PID 2900 wrote to memory of 2868	2900	cmd.exe	35
PID 2900 wrote to memory of 2868	2900	cmd.exe	35
PID 2900 wrote to memory of 2868	2900	cmd.exe	35
PID 2900 wrote to memory of 2868	2900	cmd.exe	35
PID 2700 wrote to memory of 2676	2700	cmd.exe	36
PID 2700 wrote to memory of 2676	2700	cmd.exe	36
PID 2700 wrote to memory of 2676	2700	cmd.exe	36
PID 2700 wrote to memory of 2676	2700	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\tool.exe
"C:\Users\Admin\AppData\Local\Temp\tool.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2908
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Tool" /tr '"C:\Users\Admin\AppData\Roaming\Tool.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2900
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Tool" /tr '"C:\Users\Admin\AppData\Roaming\Tool.exe"'
    3⤵
    - 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\tmp6B9F.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2700
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2172
- - C:\Users\Admin\AppData\Roaming\Tool.exe
    "C:\Users\Admin\AppData\Roaming\Tool.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2676

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp6B9F.tmp.bat

Filesize
148B

MD5
b5c9dcb771370b56e6b05571dbd3c803

SHA1
a839ab0be60959c0ff7a3bf4e7e1fcabafd63ea3

SHA256
7c36d78056ead31f7ef8b9599c21de4e9db409f3dd3e3fab6d817ff15244304d

SHA512
19c38ca52f50f70001dc1999291dae575d7a605c05da000613417e4aa4e249444bf10d3f65951896b783d7b6900b3583d963722a53c43cf76f8c3b90e90a430c

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

Filesize
45KB

MD5
b84e27e5b6cef684af80c868bf0b4ba0

SHA1
213d29cc30c693675911547643112d4c9a6c02d2

SHA256
165289612527e1bfad340f7675a701bfe9608a3a4cfbfefe6a662574d5c05f90

SHA512
3d5fb00a3793174b8f98e972c9ed7f322d1333dbda79a00676d015532e63eb69449453eda3d7e7de4d3026b49f3816ae4a12c4a2e434893d5aee52d9a3d00813

Download Submit
memory/2676-16-0x0000000000FA0000-0x0000000000FB2000-memory.dmp

Filesize
72KB

Download
memory/2908-0-0x0000000073DCE000-0x0000000073DCF000-memory.dmp

Filesize
4KB

Download
memory/2908-1-0x0000000000310000-0x0000000000322000-memory.dmp

Filesize
72KB

Download
memory/2908-2-0x0000000073DC0000-0x00000000744AE000-memory.dmp

Filesize
6.9MB

Download
memory/2908-12-0x0000000073DC0000-0x00000000744AE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads