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
143s
max time network
149s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	Drivers.exe
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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral5/files/0x0006000000019480-17.dat	family_asyncrat

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

Executes dropped EXE 2 IoCs

pid	Process
2844	Main.exe
2952	Runtime Broker.exe

Loads dropped DLL 1 IoCs

pid	Process
2644	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1244	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
1912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2844	Main.exe
2844	Main.exe
2844	Main.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2844	Main.exe
Token: SeDebugPrivilege	2952	Runtime Broker.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 2844	1952	Drivers.exe	33
PID 1952 wrote to memory of 2844	1952	Drivers.exe	33
PID 1952 wrote to memory of 2844	1952	Drivers.exe	33
PID 1952 wrote to memory of 2844	1952	Drivers.exe	33
PID 2844 wrote to memory of 2636	2844	Main.exe	34
PID 2844 wrote to memory of 2636	2844	Main.exe	34
PID 2844 wrote to memory of 2636	2844	Main.exe	34
PID 2844 wrote to memory of 2636	2844	Main.exe	34
PID 2844 wrote to memory of 2644	2844	Main.exe	36
PID 2844 wrote to memory of 2644	2844	Main.exe	36
PID 2844 wrote to memory of 2644	2844	Main.exe	36
PID 2844 wrote to memory of 2644	2844	Main.exe	36
PID 2636 wrote to memory of 1912	2636	cmd.exe	38
PID 2636 wrote to memory of 1912	2636	cmd.exe	38
PID 2636 wrote to memory of 1912	2636	cmd.exe	38
PID 2636 wrote to memory of 1912	2636	cmd.exe	38
PID 2644 wrote to memory of 1244	2644	cmd.exe	39
PID 2644 wrote to memory of 1244	2644	cmd.exe	39
PID 2644 wrote to memory of 1244	2644	cmd.exe	39
PID 2644 wrote to memory of 1244	2644	cmd.exe	39
PID 2644 wrote to memory of 2952	2644	cmd.exe	40
PID 2644 wrote to memory of 2952	2644	cmd.exe	40
PID 2644 wrote to memory of 2952	2644	cmd.exe	40
PID 2644 wrote to memory of 2952	2644	cmd.exe	40

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
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1952
- C:\Users\Admin\AppData\Roaming\Main.exe
  "C:\Users\Admin\AppData\Roaming\Main.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2844
- - 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:2636
  - - 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:1912
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3591.tmp.bat""
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2644
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:1244
  - - 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:2952

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

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\Cab53BB.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar5506.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3591.tmp.bat

Filesize
158B

MD5
ac312e8a8828b83ed7d478ae895cceb2

SHA1
a6c1a65f9acae61b14a1e6684cc89299f6d98edb

SHA256
9a478ed7d9f03241a89e9c2448c3ae7407eb9103f9f322891cf45b082b4bf677

SHA512
ab64a840872d56b69c70efbea3b6badde0603a3d0c719b587579b3d6bec79c21309e8bfb014e51e97b479dad39f636c8905011185cc61dc38312eb5228269573

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

Filesize
45KB

MD5
3c1178d8a8669ab6be6cd9f7e0cbe003

SHA1
50899c700563e6e43a81ede481caa69c1e58eb39

SHA256
901f4d6b37e9e2d2e17f082579d014a28d362711f3c90a0ca6537fb9412cd6ab

SHA512
371c329eebda4d44d816a86a59e281e834c57713b2b5dea4ece025735874024487892c5a422a7857eecf0797b0ffe2dcb166edc4c874c487845550cb195a1d0b

Download Submit
memory/2844-27-0x000000007445E000-0x000000007445F000-memory.dmp

Filesize
4KB

Download
memory/2844-28-0x0000000000C00000-0x0000000000C12000-memory.dmp

Filesize
72KB

Download
memory/2844-29-0x0000000074450000-0x0000000074B3E000-memory.dmp

Filesize
6.9MB

Download
memory/2844-39-0x0000000074450000-0x0000000074B3E000-memory.dmp

Filesize
6.9MB

Download
memory/2952-43-0x0000000000BF0000-0x0000000000C02000-memory.dmp

Filesize
72KB

Download
memory/2952-61-0x00000000041B0000-0x0000000004214000-memory.dmp

Filesize
400KB

Download