asyncrat | 5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716

General

Target

5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe
Size

45KB
MD5

b2fa91466cc86844ab15094d1977ef6d
SHA1

1b906455b8a22316777379b36bc686c3f02079cd
SHA256

5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716
SHA512

1652caa85ce027a627796ba8cb83dbbb2f8a3900c3c366d7ee6609808334048a5c0dc69c62e798b95879c891c4de49e6fef3b7e7bd4605646a464a72e43dd785
SSDEEP

768:1umC1TVMOvtWUNb2nmo2qztKjPGaG6PIyzjbFgX3imGmJUxjhR5UBDZ/x:1umC1TVd22kKTkDy3bCXSwujn5id/x

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:1337

127.0.0.1:16335

127.0.0.1:11195

18.119.130.176:6606

18.119.130.176:7707

18.119.130.176:8808

18.119.130.176:1337

18.119.130.176:16335

18.119.130.176:11195

2.tcp.ngrok.io:6606

2.tcp.ngrok.io:7707

2.tcp.ngrok.io:8808

2.tcp.ngrok.io:1337

2.tcp.ngrok.io:16335

2.tcp.ngrok.io:11195

8.tcp.ngrok.io:6606

8.tcp.ngrok.io:7707

Mutex

Yp91dpbmYOAB

Attributes

delay
3
install
true
install_file
RtlUpdate.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/0x000c000000012262-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2776	RtlUpdate.exe

Loads dropped DLL 1 IoCs

pid	Process
2980	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs

Web Service

T1102

flow	ioc
5	2.tcp.ngrok.io
10	2.tcp.ngrok.io
13	2.tcp.ngrok.io
15	2.tcp.ngrok.io

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	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	RtlUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2936	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
2864	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe
576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe
576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe
Token: SeDebugPrivilege	2776	RtlUpdate.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 576 wrote to memory of 2460	576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe	30
PID 576 wrote to memory of 2460	576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe	30
PID 576 wrote to memory of 2460	576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe	30
PID 576 wrote to memory of 2460	576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe	30
PID 576 wrote to memory of 2980	576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe	32
PID 576 wrote to memory of 2980	576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe	32
PID 576 wrote to memory of 2980	576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe	32
PID 576 wrote to memory of 2980	576	5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe	32
PID 2460 wrote to memory of 2864	2460	cmd.exe	34
PID 2460 wrote to memory of 2864	2460	cmd.exe	34
PID 2460 wrote to memory of 2864	2460	cmd.exe	34
PID 2460 wrote to memory of 2864	2460	cmd.exe	34
PID 2980 wrote to memory of 2936	2980	cmd.exe	35
PID 2980 wrote to memory of 2936	2980	cmd.exe	35
PID 2980 wrote to memory of 2936	2980	cmd.exe	35
PID 2980 wrote to memory of 2936	2980	cmd.exe	35
PID 2980 wrote to memory of 2776	2980	cmd.exe	36
PID 2980 wrote to memory of 2776	2980	cmd.exe	36
PID 2980 wrote to memory of 2776	2980	cmd.exe	36
PID 2980 wrote to memory of 2776	2980	cmd.exe	36
PID 2980 wrote to memory of 2776	2980	cmd.exe	36
PID 2980 wrote to memory of 2776	2980	cmd.exe	36
PID 2980 wrote to memory of 2776	2980	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe
"C:\Users\Admin\AppData\Local\Temp\5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:576
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "RtlUpdate" /tr '"C:\Users\Admin\AppData\Roaming\RtlUpdate.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2460
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "RtlUpdate" /tr '"C:\Users\Admin\AppData\Roaming\RtlUpdate.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2864
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDDE1.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2980
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2936
- - C:\Users\Admin\AppData\Roaming\RtlUpdate.exe
    "C:\Users\Admin\AppData\Roaming\RtlUpdate.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2776

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

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpDDE1.tmp.bat

Filesize
153B

MD5
2194d89901016c16e55b2cc0ea843153

SHA1
add1a67686408753e9e872a33b5f7dedf8267a43

SHA256
7d9e658bbf607d15d7700d0efad000093d31a7382162227f0f76b5c74c712070

SHA512
36095c7bca4ed7e0f840bfad703de633d8ef6c7e32d0d060f9dfd4ece83e323df8d537532c9fe81ed925893062fa125d32fd4151159ef66f90b82f6fa4fc114e

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

Filesize
45KB

MD5
b2fa91466cc86844ab15094d1977ef6d

SHA1
1b906455b8a22316777379b36bc686c3f02079cd

SHA256
5ef95b38828c6d99c6cc41f377373c7b1c6d5b48c6f63ceeb2b103daec226716

SHA512
1652caa85ce027a627796ba8cb83dbbb2f8a3900c3c366d7ee6609808334048a5c0dc69c62e798b95879c891c4de49e6fef3b7e7bd4605646a464a72e43dd785

Download Submit
memory/576-0-0x0000000074D4E000-0x0000000074D4F000-memory.dmp

Filesize
4KB

Download
memory/576-1-0x0000000000020000-0x0000000000032000-memory.dmp

Filesize
72KB

Download
memory/576-2-0x0000000074D40000-0x000000007542E000-memory.dmp

Filesize
6.9MB

Download
memory/576-12-0x0000000074D40000-0x000000007542E000-memory.dmp

Filesize
6.9MB

Download
memory/2776-16-0x0000000000BF0000-0x0000000000C02000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads