asyncrat | 1e01e5c379d7504669a75f317c60c31297dc347792b9131fad73092a88383393

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
09-12-2024 16:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

41VMO_file.exe
Size

3.6MB
MD5

d3f515d42cf7e62738c596dc4ba9fdb9
SHA1

f63216b18ab4265d9c0b3243ba491fcb74b1bac6
SHA256

1e01e5c379d7504669a75f317c60c31297dc347792b9131fad73092a88383393
SHA512

81462412b18e715f81499769c6e3a89cd612683151b7984452dac4f1e5b2e69b6a0fc6542103327e6e46668d9b2268502fcc98415c44a054f1168f7bc8fefb52
SSDEEP

49152:TwWtZnTwCk7UHla796h+16eUMTycWaX/Ngvv1VlHIPIV/CdQvJuJ44wPcbErkcz3:TwwvYXUMmczWvnlo0KSj5L1Ln9

Score

10^/10

asyncrat venomrat default discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

185.208.158.187:4449

Mutex

tnybaidkzovl

Attributes

delay
10
install
true
install_file
NotepadUpdate.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

VenomRAT 7 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral1/memory/2708-19-0x0000000000400000-0x0000000000418000-memory.dmp	VenomRAT
behavioral1/memory/2708-23-0x0000000000400000-0x0000000000418000-memory.dmp	VenomRAT
behavioral1/memory/2708-22-0x0000000000400000-0x0000000000418000-memory.dmp	VenomRAT
behavioral1/memory/2708-17-0x0000000000400000-0x0000000000418000-memory.dmp	VenomRAT
behavioral1/memory/2708-25-0x0000000000400000-0x0000000000418000-memory.dmp	VenomRAT
behavioral1/memory/1480-58-0x0000000000400000-0x0000000000418000-memory.dmp	VenomRAT
behavioral1/memory/1480-56-0x0000000000400000-0x0000000000418000-memory.dmp	VenomRAT

Venomrat family
venomrat

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2692	powershell.exe
836	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
1132	NotepadUpdate.exe
1480	NotepadUpdate.exe

Loads dropped DLL 2 IoCs

pid	Process
800	cmd.exe
1132	NotepadUpdate.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2084 set thread context of 2708	2084	41VMO_file.exe	35
PID 1132 set thread context of 1480	1132	NotepadUpdate.exe	47

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 12 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	41VMO_file.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	NotepadUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NotepadUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	41VMO_file.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2816	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2748	schtasks.exe
1820	schtasks.exe
1192	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2692	powershell.exe
2708	41VMO_file.exe
2708	41VMO_file.exe
2708	41VMO_file.exe
836	powershell.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe
1480	NotepadUpdate.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2708	41VMO_file.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	1480	NotepadUpdate.exe
Token: SeDebugPrivilege	836	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1480	NotepadUpdate.exe

Suspicious use of WriteProcessMemory 60 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2692	2084	41VMO_file.exe	31
PID 2084 wrote to memory of 2692	2084	41VMO_file.exe	31
PID 2084 wrote to memory of 2692	2084	41VMO_file.exe	31
PID 2084 wrote to memory of 2692	2084	41VMO_file.exe	31
PID 2084 wrote to memory of 2748	2084	41VMO_file.exe	32
PID 2084 wrote to memory of 2748	2084	41VMO_file.exe	32
PID 2084 wrote to memory of 2748	2084	41VMO_file.exe	32
PID 2084 wrote to memory of 2748	2084	41VMO_file.exe	32
PID 2084 wrote to memory of 2708	2084	41VMO_file.exe	35
PID 2084 wrote to memory of 2708	2084	41VMO_file.exe	35
PID 2084 wrote to memory of 2708	2084	41VMO_file.exe	35
PID 2084 wrote to memory of 2708	2084	41VMO_file.exe	35
PID 2084 wrote to memory of 2708	2084	41VMO_file.exe	35
PID 2084 wrote to memory of 2708	2084	41VMO_file.exe	35
PID 2084 wrote to memory of 2708	2084	41VMO_file.exe	35
PID 2084 wrote to memory of 2708	2084	41VMO_file.exe	35
PID 2084 wrote to memory of 2708	2084	41VMO_file.exe	35
PID 2708 wrote to memory of 2768	2708	41VMO_file.exe	36
PID 2708 wrote to memory of 2768	2708	41VMO_file.exe	36
PID 2708 wrote to memory of 2768	2708	41VMO_file.exe	36
PID 2708 wrote to memory of 2768	2708	41VMO_file.exe	36
PID 2708 wrote to memory of 800	2708	41VMO_file.exe	37
PID 2708 wrote to memory of 800	2708	41VMO_file.exe	37
PID 2708 wrote to memory of 800	2708	41VMO_file.exe	37
PID 2708 wrote to memory of 800	2708	41VMO_file.exe	37
PID 800 wrote to memory of 2816	800	cmd.exe	40
PID 800 wrote to memory of 2816	800	cmd.exe	40
PID 800 wrote to memory of 2816	800	cmd.exe	40
PID 800 wrote to memory of 2816	800	cmd.exe	40
PID 2768 wrote to memory of 1820	2768	cmd.exe	41
PID 2768 wrote to memory of 1820	2768	cmd.exe	41
PID 2768 wrote to memory of 1820	2768	cmd.exe	41
PID 2768 wrote to memory of 1820	2768	cmd.exe	41
PID 800 wrote to memory of 1132	800	cmd.exe	42
PID 800 wrote to memory of 1132	800	cmd.exe	42
PID 800 wrote to memory of 1132	800	cmd.exe	42
PID 800 wrote to memory of 1132	800	cmd.exe	42
PID 800 wrote to memory of 1132	800	cmd.exe	42
PID 800 wrote to memory of 1132	800	cmd.exe	42
PID 800 wrote to memory of 1132	800	cmd.exe	42
PID 1132 wrote to memory of 836	1132	NotepadUpdate.exe	43
PID 1132 wrote to memory of 836	1132	NotepadUpdate.exe	43
PID 1132 wrote to memory of 836	1132	NotepadUpdate.exe	43
PID 1132 wrote to memory of 836	1132	NotepadUpdate.exe	43
PID 1132 wrote to memory of 1192	1132	NotepadUpdate.exe	45
PID 1132 wrote to memory of 1192	1132	NotepadUpdate.exe	45
PID 1132 wrote to memory of 1192	1132	NotepadUpdate.exe	45
PID 1132 wrote to memory of 1192	1132	NotepadUpdate.exe	45
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47
PID 1132 wrote to memory of 1480	1132	NotepadUpdate.exe	47

C:\Users\Admin\AppData\Local\Temp\41VMO_file.exe
"C:\Users\Admin\AppData\Local\Temp\41VMO_file.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yRnixT.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2692
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yRnixT" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEA30.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2748
- C:\Users\Admin\AppData\Local\Temp\41VMO_file.exe
  "C:\Users\Admin\AppData\Local\Temp\41VMO_file.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2708
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "NotepadUpdate" /tr '"C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2768
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "NotepadUpdate" /tr '"C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1820
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp15C2.tmp.bat""
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:800
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:2816
  - - C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe
      "C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1132
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yRnixT.exe"
        5⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:836
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yRnixT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp61DF.tmp"
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1192
    - - C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe
        
        "C:\Users\Admin\AppData\Roaming\NotepadUpdate.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        
        PID:1480

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

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\Cab8E2E.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar9F8F.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp15C2.tmp.bat

Filesize
157B

MD5
9d057d544fd1d6f9806a964d93882f89

SHA1
6c5e332721317bc0fbb5526a26c7bde4d60fd0fc

SHA256
a11e6a512b63f4bbc111307305d6866debfba488497ba969856452f1af516c49

SHA512
2e8b067d17b955d5d43443e2005ac2abc65380be40099ad43423114aec01e3bcdf107f386da82079e94744e9827fc361d4f57658050544106354100502923755

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpEA30.tmp

Filesize
1KB

MD5
fc811d508da92c30abb6c3dfd5b07745

SHA1
04ffca3391143b32699e9140f87d96ddf4639cc7

SHA256
64ecd0f983084df687e0d6683d3a13bff2e853a960ba609c78b0b87a7574a484

SHA512
b0b613a45691e658fe8cca07cd63bf2a20ad717bdad4eb78f6d591aa1ad61ba7e0a7d4e8a0c620954f82e24b0befe0faddfa34c1ed9419feaaf7e9da6d3cda90

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\1XM1T34ZWB4B5SFNYEF5.temp

Filesize
7KB

MD5
f4713f0ed71a23c2caa9be7d32ab6cc9

SHA1
d876b70c1483fc2543fde80e9dd4e0c26c1efab3

SHA256
98eb8b14b81cfe0655280e4bb81efb972f72796c39f0c99eaa664fb014ecef62

SHA512
e31c0723cad2f7ef1b4723fc81a75ffb1b72dfe8dbeed65d2b56288a1f9cac0f521fc774aae2a62f9141fc35af5c52fa37e2855bc3c506364a727fe294dc9733

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
e1cb0bafc67db478f9017a92ce6d5e6d

SHA1
2b01d340eb2d2e6b32f30b313eb16b9c03a049f0

SHA256
e4120a3ae87dae1c332f759a29c764cd07b7d2b4b7e044252321d5c80794075c

SHA512
e1906670e6e26a1a34cb1dc77b84cea3303934c997a988626ef03a227ea3ca392c7e4b4d1dc848b722327cb2f20c3002c2c894a3f7770a4e98da315fe6356cff

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

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

Filesize
3.6MB

MD5
d3f515d42cf7e62738c596dc4ba9fdb9

SHA1
f63216b18ab4265d9c0b3243ba491fcb74b1bac6

SHA256
1e01e5c379d7504669a75f317c60c31297dc347792b9131fad73092a88383393

SHA512
81462412b18e715f81499769c6e3a89cd612683151b7984452dac4f1e5b2e69b6a0fc6542103327e6e46668d9b2268502fcc98415c44a054f1168f7bc8fefb52

Download Submit
memory/1132-40-0x0000000000B50000-0x0000000000C38000-memory.dmp

Filesize
928KB

Download
memory/1480-53-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1480-56-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1480-58-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2084-5-0x0000000004710000-0x000000000476C000-memory.dmp

Filesize
368KB

Download
memory/2084-1-0x0000000000CB0000-0x0000000000D98000-memory.dmp

Filesize
928KB

Download
memory/2084-2-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2084-27-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2084-3-0x00000000004A0000-0x00000000004BE000-memory.dmp

Filesize
120KB

Download
memory/2084-4-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2084-0-0x000000007485E000-0x000000007485F000-memory.dmp

Filesize
4KB

Download
memory/2708-17-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2708-13-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2708-19-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2708-25-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2708-15-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2708-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2708-22-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2708-23-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download