asyncrat | d1ba8885bb27b8b53e8754181b474f47d0afc57ce406ca4c18edf111cbb63226

General

Target

2498d43b33fdf705d23a044d0704271b.exe
Size

47KB
MD5

2498d43b33fdf705d23a044d0704271b
SHA1

79b2ee6e706d561533936cde87a46830fbfeec9b
SHA256

d1ba8885bb27b8b53e8754181b474f47d0afc57ce406ca4c18edf111cbb63226
SHA512

79b0ff8be1762e31c20ae5b5440958bbe652b11f219a5542d9cd2fa789c90dd5898b14be2245ae03f49c5ada54db0547df5eacc7d143f9c0ea608fb4600b4690
SSDEEP

768:xuI9dTsErkZTWU/lPhmo2qbfhtE7Tb7PPIOinDpm0bR4bvYvrQWrfdxF+XaBDZMx:xuI9dTsXB2VTb7IOindpbR4DYTQEdxF6

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

thing-wine.gl.at.ply.gg:55280

Mutex

EFhpy3TPM7sR

Attributes

delay
3
install
true
install_file
Ass.exe
install_folder
%Temp%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x00080000000120fd-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2848	Ass.exe

Loads dropped DLL 1 IoCs

pid	Process
2728	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	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	Ass.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2498d43b33fdf705d23a044d0704271b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2844	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
2816	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2524	2498d43b33fdf705d23a044d0704271b.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2524	2498d43b33fdf705d23a044d0704271b.exe
Token: SeDebugPrivilege	2848	Ass.exe
Token: SeDebugPrivilege	2848	Ass.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 2316	2524	2498d43b33fdf705d23a044d0704271b.exe	29
PID 2524 wrote to memory of 2316	2524	2498d43b33fdf705d23a044d0704271b.exe	29
PID 2524 wrote to memory of 2316	2524	2498d43b33fdf705d23a044d0704271b.exe	29
PID 2524 wrote to memory of 2316	2524	2498d43b33fdf705d23a044d0704271b.exe	29
PID 2524 wrote to memory of 2728	2524	2498d43b33fdf705d23a044d0704271b.exe	31
PID 2524 wrote to memory of 2728	2524	2498d43b33fdf705d23a044d0704271b.exe	31
PID 2524 wrote to memory of 2728	2524	2498d43b33fdf705d23a044d0704271b.exe	31
PID 2524 wrote to memory of 2728	2524	2498d43b33fdf705d23a044d0704271b.exe	31
PID 2316 wrote to memory of 2816	2316	cmd.exe	33
PID 2316 wrote to memory of 2816	2316	cmd.exe	33
PID 2316 wrote to memory of 2816	2316	cmd.exe	33
PID 2316 wrote to memory of 2816	2316	cmd.exe	33
PID 2728 wrote to memory of 2844	2728	cmd.exe	34
PID 2728 wrote to memory of 2844	2728	cmd.exe	34
PID 2728 wrote to memory of 2844	2728	cmd.exe	34
PID 2728 wrote to memory of 2844	2728	cmd.exe	34
PID 2728 wrote to memory of 2848	2728	cmd.exe	35
PID 2728 wrote to memory of 2848	2728	cmd.exe	35
PID 2728 wrote to memory of 2848	2728	cmd.exe	35
PID 2728 wrote to memory of 2848	2728	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\2498d43b33fdf705d23a044d0704271b.exe
"C:\Users\Admin\AppData\Local\Temp\2498d43b33fdf705d23a044d0704271b.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Ass" /tr '"C:\Users\Admin\AppData\Local\Temp\Ass.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2316
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Ass" /tr '"C:\Users\Admin\AppData\Local\Temp\Ass.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2816
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8C58.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2728
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2844
- - C:\Users\Admin\AppData\Local\Temp\Ass.exe
    "C:\Users\Admin\AppData\Local\Temp\Ass.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2848

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\tmp8C58.tmp.bat

Filesize
150B

MD5
9a0f37536bf1a826e6f80100e142d433

SHA1
a6f07e0e1df38cdbba9b1552492fc78068c73d2b

SHA256
0782e84f2d6e7c6a18aa2bd269aea6a044135dcf9862b19f7a0ed1c8b54fc34c

SHA512
f71d22ecc3a2e67288717167c441482cae586a9263b69b90e72e06658f17fad127e1397312893388bb24703dab0c65a4b3f30e90e1a1d42ed52067e27eb8ee4f

Download Submit
\Users\Admin\AppData\Local\Temp\Ass.exe

Filesize
47KB

MD5
2498d43b33fdf705d23a044d0704271b

SHA1
79b2ee6e706d561533936cde87a46830fbfeec9b

SHA256
d1ba8885bb27b8b53e8754181b474f47d0afc57ce406ca4c18edf111cbb63226

SHA512
79b0ff8be1762e31c20ae5b5440958bbe652b11f219a5542d9cd2fa789c90dd5898b14be2245ae03f49c5ada54db0547df5eacc7d143f9c0ea608fb4600b4690

Download Submit
memory/2524-0-0x00000000747AE000-0x00000000747AF000-memory.dmp

Filesize
4KB

Download
memory/2524-1-0x00000000009B0000-0x00000000009C2000-memory.dmp

Filesize
72KB

Download
memory/2524-2-0x00000000747A0000-0x0000000074E8E000-memory.dmp

Filesize
6.9MB

Download
memory/2524-12-0x00000000747A0000-0x0000000074E8E000-memory.dmp

Filesize
6.9MB

Download
memory/2848-16-0x0000000000F50000-0x0000000000F62000-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