asyncrat | af864a8fd8576810fdf0171c9983280536199bafc68cc37a5d532ceff71fff88

General

Target

AsyncClient.exe
Size

45KB
MD5

b77efa9b19b5b1b63264632c6b9dc749
SHA1

b31eb2953de482cdcced69283032fbc8ca6b1042
SHA256

af864a8fd8576810fdf0171c9983280536199bafc68cc37a5d532ceff71fff88
SHA512

2d602f3a99131a9d691b952416de0c0e098a2f680deb425034458db26240d32d9e98ac6e636ab1ac15f51f37dc6551197aacd4171e623dcd4fa676ae971cd84c
SSDEEP

768:+uynFTMIGZ8btAWUu7y6mo2q8YKjPGaG6PIyzjbFgX3iQjEZsTNt77R1CtBDZqx:+uynFTMtkf2MKTkDy3bCXSQ/3dCdqx

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

192.168.0.174:8808

Mutex

bsOjaqZKQz62

Attributes

delay
3
install
true
install_file
dad.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/0x0009000000016cab-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2600	dad.exe

Loads dropped DLL 1 IoCs

pid	Process
2488	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	AsyncClient.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dad.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2808	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
2804	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2296	AsyncClient.exe
2296	AsyncClient.exe
2296	AsyncClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2296	AsyncClient.exe
Token: SeDebugPrivilege	2600	dad.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2296 wrote to memory of 2324	2296	AsyncClient.exe	31
PID 2296 wrote to memory of 2324	2296	AsyncClient.exe	31
PID 2296 wrote to memory of 2324	2296	AsyncClient.exe	31
PID 2296 wrote to memory of 2324	2296	AsyncClient.exe	31
PID 2296 wrote to memory of 2488	2296	AsyncClient.exe	33
PID 2296 wrote to memory of 2488	2296	AsyncClient.exe	33
PID 2296 wrote to memory of 2488	2296	AsyncClient.exe	33
PID 2296 wrote to memory of 2488	2296	AsyncClient.exe	33
PID 2324 wrote to memory of 2804	2324	cmd.exe	35
PID 2324 wrote to memory of 2804	2324	cmd.exe	35
PID 2324 wrote to memory of 2804	2324	cmd.exe	35
PID 2324 wrote to memory of 2804	2324	cmd.exe	35
PID 2488 wrote to memory of 2808	2488	cmd.exe	36
PID 2488 wrote to memory of 2808	2488	cmd.exe	36
PID 2488 wrote to memory of 2808	2488	cmd.exe	36
PID 2488 wrote to memory of 2808	2488	cmd.exe	36
PID 2488 wrote to memory of 2600	2488	cmd.exe	37
PID 2488 wrote to memory of 2600	2488	cmd.exe	37
PID 2488 wrote to memory of 2600	2488	cmd.exe	37
PID 2488 wrote to memory of 2600	2488	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2296
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dad" /tr '"C:\Users\Admin\AppData\Roaming\dad.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2324
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "dad" /tr '"C:\Users\Admin\AppData\Roaming\dad.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2804
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp15B2.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2488
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2808
- - C:\Users\Admin\AppData\Roaming\dad.exe
    "C:\Users\Admin\AppData\Roaming\dad.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2600

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\tmp15B2.tmp.bat

Filesize
147B

MD5
96f8263424825d0c13b2481a1567d954

SHA1
5002e9c0ded2170eb053979ed75e79a144e35a97

SHA256
6afe27c23262f65b28fb31b33548cbc3285a50ac1d7afa6f60356fdb97a420a7

SHA512
2fd459475481230d7c0658500a9125c5a91575d58985ea805019c2e99dfece1dcddd9cb4117b0698803fe35d937401a6524163cf50b662bdd9ad47b95614e246

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

Filesize
45KB

MD5
b77efa9b19b5b1b63264632c6b9dc749

SHA1
b31eb2953de482cdcced69283032fbc8ca6b1042

SHA256
af864a8fd8576810fdf0171c9983280536199bafc68cc37a5d532ceff71fff88

SHA512
2d602f3a99131a9d691b952416de0c0e098a2f680deb425034458db26240d32d9e98ac6e636ab1ac15f51f37dc6551197aacd4171e623dcd4fa676ae971cd84c

Download Submit
memory/2296-0-0x000000007445E000-0x000000007445F000-memory.dmp

Filesize
4KB

Download
memory/2296-1-0x0000000000020000-0x0000000000032000-memory.dmp

Filesize
72KB

Download
memory/2296-2-0x0000000074450000-0x0000000074B3E000-memory.dmp

Filesize
6.9MB

Download
memory/2296-12-0x0000000074450000-0x0000000074B3E000-memory.dmp

Filesize
6.9MB

Download
memory/2600-16-0x00000000012A0000-0x00000000012B2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads