asyncrat | 92847b5aee61516d9a8469dfe9b9d05692834f9f2da8ade00b2cc0721c8a217b

General

Target

55394ffc99ace9a97d0c529a2be317c0N.exe
Size

47KB
MD5

55394ffc99ace9a97d0c529a2be317c0
SHA1

0427b719d52fa112112e3b8001cf2fb5a69c5798
SHA256

92847b5aee61516d9a8469dfe9b9d05692834f9f2da8ade00b2cc0721c8a217b
SHA512

e5fe23e7e6e699a1e45578c1ce5170651dac33b7b17596a89845a29b1dd732665c8a08c070b959d5ff473d91de3ca84f4adc498f051d5452223b27731d32ce6e
SSDEEP

768:AuIndTsErkZTWU/lPhmo2qbJKLKsrcDo117iPINEwf8P6H61fitbRU2pDV8dHwya:AuIndTsXB2OKL3Go1pNEwks2WbRvDx+4

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

127.0.0.1:8000

127.0.0.1:11735

0.tcp.eu.ngrok.io:11735:6606

0.tcp.eu.ngrok.io:11735:7707

0.tcp.eu.ngrok.io:11735:8808

0.tcp.eu.ngrok.io:11735:8000

0.tcp.eu.ngrok.io:11735:11735

Mutex

H3X4yAaCJZBT

Attributes

delay
6
install
true
install_file
test.exe
install_folder
%AppData%

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/0x00070000000120f9-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2536	test.exe

Loads dropped DLL 1 IoCs

pid	Process
2660	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	55394ffc99ace9a97d0c529a2be317c0N.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	test.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2556	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
2876	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2260	55394ffc99ace9a97d0c529a2be317c0N.exe
2260	55394ffc99ace9a97d0c529a2be317c0N.exe
2260	55394ffc99ace9a97d0c529a2be317c0N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2260	55394ffc99ace9a97d0c529a2be317c0N.exe
Token: SeDebugPrivilege	2536	test.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2260 wrote to memory of 2696	2260	55394ffc99ace9a97d0c529a2be317c0N.exe	30
PID 2260 wrote to memory of 2696	2260	55394ffc99ace9a97d0c529a2be317c0N.exe	30
PID 2260 wrote to memory of 2696	2260	55394ffc99ace9a97d0c529a2be317c0N.exe	30
PID 2260 wrote to memory of 2696	2260	55394ffc99ace9a97d0c529a2be317c0N.exe	30
PID 2260 wrote to memory of 2660	2260	55394ffc99ace9a97d0c529a2be317c0N.exe	32
PID 2260 wrote to memory of 2660	2260	55394ffc99ace9a97d0c529a2be317c0N.exe	32
PID 2260 wrote to memory of 2660	2260	55394ffc99ace9a97d0c529a2be317c0N.exe	32
PID 2260 wrote to memory of 2660	2260	55394ffc99ace9a97d0c529a2be317c0N.exe	32
PID 2696 wrote to memory of 2876	2696	cmd.exe	34
PID 2696 wrote to memory of 2876	2696	cmd.exe	34
PID 2696 wrote to memory of 2876	2696	cmd.exe	34
PID 2696 wrote to memory of 2876	2696	cmd.exe	34
PID 2660 wrote to memory of 2556	2660	cmd.exe	35
PID 2660 wrote to memory of 2556	2660	cmd.exe	35
PID 2660 wrote to memory of 2556	2660	cmd.exe	35
PID 2660 wrote to memory of 2556	2660	cmd.exe	35
PID 2660 wrote to memory of 2536	2660	cmd.exe	36
PID 2660 wrote to memory of 2536	2660	cmd.exe	36
PID 2660 wrote to memory of 2536	2660	cmd.exe	36
PID 2660 wrote to memory of 2536	2660	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\55394ffc99ace9a97d0c529a2be317c0N.exe
"C:\Users\Admin\AppData\Local\Temp\55394ffc99ace9a97d0c529a2be317c0N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2260
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2696
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2876
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp627A.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2660
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2556
- - C:\Users\Admin\AppData\Roaming\test.exe
    "C:\Users\Admin\AppData\Roaming\test.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2536

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\tmp627A.tmp.bat

Filesize
148B

MD5
2a8ebb716dc2a0e2fc6ab9e87f428849

SHA1
23542dc363a4c61b2ac1f0c1b5b5faa0b7ead44c

SHA256
a9b032751adfc1dfb3b7bb9d6dc36f9b1d0207dd22d0205a632e4fe8e37cb100

SHA512
f0de086c8363eff0b70901973e02d418a99d991d524e5828ff85e7c3ce5bb22f891b4c12e46439cf032be3a7f94554d22bd5854ecc4ad8aae52bab6497baca73

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

Filesize
47KB

MD5
55394ffc99ace9a97d0c529a2be317c0

SHA1
0427b719d52fa112112e3b8001cf2fb5a69c5798

SHA256
92847b5aee61516d9a8469dfe9b9d05692834f9f2da8ade00b2cc0721c8a217b

SHA512
e5fe23e7e6e699a1e45578c1ce5170651dac33b7b17596a89845a29b1dd732665c8a08c070b959d5ff473d91de3ca84f4adc498f051d5452223b27731d32ce6e

Download Submit
memory/2260-0-0x000000007406E000-0x000000007406F000-memory.dmp

Filesize
4KB

Download
memory/2260-1-0x0000000001310000-0x0000000001322000-memory.dmp

Filesize
72KB

Download
memory/2260-2-0x0000000074060000-0x000000007474E000-memory.dmp

Filesize
6.9MB

Download
memory/2260-11-0x0000000074060000-0x000000007474E000-memory.dmp

Filesize
6.9MB

Download
memory/2536-16-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads