asyncrat | 80a014e40493d25ab26964e06ee2c8c885bb8c70d549d1eacd6fb2626cd9a9f5

Resubmissions

13/01/2025, 00:07

250113-aet59aymcl 3

11/01/2025, 23:31

250111-3h1resxjcl 10

11/01/2025, 23:29

250111-3g1p2awrgr 10

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11/01/2025, 23:29

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Drivers.exe
Size

21KB
MD5

3dbe554d99db5921c2869df9745b32be
SHA1

ec61ad96e9848de6e55121c8acd8be6221cc204b
SHA256

70b2d5ddb11d58b8a53d0fdc74259241057812e4dfc21a03b937a320e290d822
SHA512

6e752d09c1c214bd73f5295eb6ff65eb324d123a57de4ae5516b972f9ec3208e962aca9089f9ef6b91ca3c9394d5c6fd68e806012e9b4aff3f9277b3ee8cd6cc
SSDEEP

384:vTRQmNZSqP8MyoXKQmXNQltXpQyXlQx/uoOQtGQmXE9RrA5iXNjd2Ht5rkFJ0Wqx:WlOq2tzclrldjdKkFJCVA3g

Score

10^/10

asyncrat default discovery evasion rat trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

136.243.175.182:7777

Mutex

9HD6aMtS9FtK

Attributes

delay
3
install
true
install_file
Runtime Broker.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

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	Drivers.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	Drivers.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	Drivers.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	Drivers.exe

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral6/files/0x0007000000023c7c-12.dat	family_asyncrat

Disables Task Manager via registry modification
evasion
Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	Drivers.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	Main.exe

Executes dropped EXE 2 IoCs

pid	Process
4760	Main.exe
3472	Runtime Broker.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Runtime Broker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Main.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
816	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
760	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe
4760	Main.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4760	Main.exe
Token: SeDebugPrivilege	3472	Runtime Broker.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 4760	4808	Drivers.exe	83
PID 4808 wrote to memory of 4760	4808	Drivers.exe	83
PID 4808 wrote to memory of 4760	4808	Drivers.exe	83
PID 4760 wrote to memory of 2940	4760	Main.exe	85
PID 4760 wrote to memory of 2940	4760	Main.exe	85
PID 4760 wrote to memory of 2940	4760	Main.exe	85
PID 4760 wrote to memory of 2648	4760	Main.exe	87
PID 4760 wrote to memory of 2648	4760	Main.exe	87
PID 4760 wrote to memory of 2648	4760	Main.exe	87
PID 2940 wrote to memory of 760	2940	cmd.exe	89
PID 2940 wrote to memory of 760	2940	cmd.exe	89
PID 2940 wrote to memory of 760	2940	cmd.exe	89
PID 2648 wrote to memory of 816	2648	cmd.exe	90
PID 2648 wrote to memory of 816	2648	cmd.exe	90
PID 2648 wrote to memory of 816	2648	cmd.exe	90
PID 2648 wrote to memory of 3472	2648	cmd.exe	91
PID 2648 wrote to memory of 3472	2648	cmd.exe	91
PID 2648 wrote to memory of 3472	2648	cmd.exe	91

System policy modification 1 TTPs 4 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer	Drivers.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoControlPanel = "1"	Drivers.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System	Drivers.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableSettingsPage = "1"	Drivers.exe

C:\Users\Admin\AppData\Local\Temp\Drivers.exe
"C:\Users\Admin\AppData\Local\Temp\Drivers.exe"
1⤵
- Modifies Windows Defender Real-time Protection settings
- Checks computer location settings
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4808
- C:\Users\Admin\AppData\Roaming\Main.exe
  "C:\Users\Admin\AppData\Roaming\Main.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4760
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Runtime Broker" /tr '"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2940
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Runtime Broker" /tr '"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:760
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp97EA.tmp.bat""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2648
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:816
  - - C:\Users\Admin\AppData\Roaming\Runtime Broker.exe
      "C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:3472

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp97EA.tmp.bat

Filesize
158B

MD5
e7c3b7310da6a7eb8d1f48294fc988e0

SHA1
10f89622d8afe629517f158e2b320e0bf68e3bee

SHA256
12338df34ff2b00867953975f634212e0ac37aafdc6f49b14bb497bb3fc481d8

SHA512
f6629ae8ce48ab4558b12ffbbe9e848a8380d88dfeb44e6bcdbe099b51c65d4a2d0aa9dc7c570f7f398e1014c7d04ad1f87368771ca11e4f8a71bface58ed9e1

Download Submit
C:\Users\Admin\AppData\Roaming\Main.exe

Filesize
45KB

MD5
3c1178d8a8669ab6be6cd9f7e0cbe003

SHA1
50899c700563e6e43a81ede481caa69c1e58eb39

SHA256
901f4d6b37e9e2d2e17f082579d014a28d362711f3c90a0ca6537fb9412cd6ab

SHA512
371c329eebda4d44d816a86a59e281e834c57713b2b5dea4ece025735874024487892c5a422a7857eecf0797b0ffe2dcb166edc4c874c487845550cb195a1d0b

Download Submit
memory/3472-37-0x0000000005EF0000-0x0000000006494000-memory.dmp

Filesize
5.6MB

Download
memory/3472-38-0x0000000005580000-0x00000000055E6000-memory.dmp

Filesize
408KB

Download
memory/3472-39-0x0000000005470000-0x00000000054E6000-memory.dmp

Filesize
472KB

Download
memory/3472-40-0x00000000053F0000-0x0000000005454000-memory.dmp

Filesize
400KB

Download
memory/3472-41-0x0000000005C80000-0x0000000005C9E000-memory.dmp

Filesize
120KB

Download
memory/4760-22-0x000000007536E000-0x000000007536F000-memory.dmp

Filesize
4KB

Download
memory/4760-23-0x0000000000E80000-0x0000000000E92000-memory.dmp

Filesize
72KB

Download
memory/4760-24-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/4760-25-0x00000000058A0000-0x000000000593C000-memory.dmp

Filesize
624KB

Download
memory/4760-30-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download