asyncrat | aaebd2f26a0aa13a312b08d6c1f6fd62f57e744727da88c0c44d8d23c778dddd

General

Target

AsyncClient.exe
Size

45KB
MD5

670af6cdd160ac768544d9a7ebe9975e
SHA1

b96f901ab0ca03dcbc348c4f25839153265357d9
SHA256

aaebd2f26a0aa13a312b08d6c1f6fd62f57e744727da88c0c44d8d23c778dddd
SHA512

c491b5bb1db904ddf2d34add8794eed7ba074d633f4c5439ffdf41dbd23cf5d8f182808de9734a25b417229d02b814bd9bc35ec9c29861ed0588e2d9cfdb1166
SSDEEP

768:UuETKT0k3qXWUrV6e1mo2qyIQKjPGaG6PIyzjbFgX3i/p0yXGH0YWBDZVj:UuETKT0cE2/1KTkDy3bCXS/p0yu8dVj

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

197.48.74.234:6606

Mutex

xYOOhhxRbEW7

Attributes

delay
3
install
true
install_file
ratatoulie.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/0x0005000000010300-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2444	ratatoulie.exe

Loads dropped DLL 1 IoCs

pid	Process
2876	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	ratatoulie.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2748	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
2588	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2700	AsyncClient.exe
2700	AsyncClient.exe
2700	AsyncClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2700	AsyncClient.exe
Token: SeDebugPrivilege	2444	ratatoulie.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2700 wrote to memory of 2812	2700	AsyncClient.exe	30
PID 2700 wrote to memory of 2812	2700	AsyncClient.exe	30
PID 2700 wrote to memory of 2812	2700	AsyncClient.exe	30
PID 2700 wrote to memory of 2812	2700	AsyncClient.exe	30
PID 2700 wrote to memory of 2876	2700	AsyncClient.exe	32
PID 2700 wrote to memory of 2876	2700	AsyncClient.exe	32
PID 2700 wrote to memory of 2876	2700	AsyncClient.exe	32
PID 2700 wrote to memory of 2876	2700	AsyncClient.exe	32
PID 2812 wrote to memory of 2588	2812	cmd.exe	34
PID 2812 wrote to memory of 2588	2812	cmd.exe	34
PID 2812 wrote to memory of 2588	2812	cmd.exe	34
PID 2812 wrote to memory of 2588	2812	cmd.exe	34
PID 2876 wrote to memory of 2748	2876	cmd.exe	35
PID 2876 wrote to memory of 2748	2876	cmd.exe	35
PID 2876 wrote to memory of 2748	2876	cmd.exe	35
PID 2876 wrote to memory of 2748	2876	cmd.exe	35
PID 2876 wrote to memory of 2444	2876	cmd.exe	36
PID 2876 wrote to memory of 2444	2876	cmd.exe	36
PID 2876 wrote to memory of 2444	2876	cmd.exe	36
PID 2876 wrote to memory of 2444	2876	cmd.exe	36

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:2700
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ratatoulie" /tr '"C:\Users\Admin\AppData\Roaming\ratatoulie.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2812
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ratatoulie" /tr '"C:\Users\Admin\AppData\Roaming\ratatoulie.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2588
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp197A.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2876
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2748
- - C:\Users\Admin\AppData\Roaming\ratatoulie.exe
    "C:\Users\Admin\AppData\Roaming\ratatoulie.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2444

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp197A.tmp.bat

Filesize
154B

MD5
9f994d4470624600e9a2f9343c5d112f

SHA1
354d2c818929fe93153838e3359e14d03af94327

SHA256
8eba424e72cd7259c695aa41f44911d4770e8aec667b237f008d384cc61f8170

SHA512
c14368d11c04689ddefbbb87105066764c3f2d2cadbd4f8f35730c7051469721f26eb69b1b251bfb2d70bcfbabe62fdfea5409844a2262ea46e9036143489173

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

Filesize
45KB

MD5
670af6cdd160ac768544d9a7ebe9975e

SHA1
b96f901ab0ca03dcbc348c4f25839153265357d9

SHA256
aaebd2f26a0aa13a312b08d6c1f6fd62f57e744727da88c0c44d8d23c778dddd

SHA512
c491b5bb1db904ddf2d34add8794eed7ba074d633f4c5439ffdf41dbd23cf5d8f182808de9734a25b417229d02b814bd9bc35ec9c29861ed0588e2d9cfdb1166

Download Submit
memory/2444-16-0x00000000009F0000-0x0000000000A02000-memory.dmp

Filesize
72KB

Download
memory/2700-0-0x000000007431E000-0x000000007431F000-memory.dmp

Filesize
4KB

Download
memory/2700-1-0x0000000000EB0000-0x0000000000EC2000-memory.dmp

Filesize
72KB

Download
memory/2700-2-0x0000000074310000-0x00000000749FE000-memory.dmp

Filesize
6.9MB

Download
memory/2700-11-0x0000000074310000-0x00000000749FE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads