asyncrat | 1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146

Analysis

max time kernel
148s
max time network
121s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
04-08-2024 14:59

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General

Target

143734ace32a278d89d77af8c7fdfa80.exe
Size

74KB
MD5

143734ace32a278d89d77af8c7fdfa80
SHA1

ef834bb92bb57eda87458d1a2ee3525a4b91a6ef
SHA256

1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146
SHA512

e894eecfa4f84dc1e0abbc07cab9faefbf4e9cdd6e4a93089970ce16d01e1db4aa3bd309281e07a36d854691852654e099eecc18244db377cc5664c458a7ce9d
SSDEEP

1536:/Ut8cxqnHXC56PMV+e9VdQuDI6H1bf/TOur1LQzcQTtVclN:/UOcxq3O6PMV+e9VdQsH1bfLPrVQlT/Y

Score

10^/10

asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Mutex

rufrwqqzhtx

Attributes

delay
1
install
true
install_file
WinUpdate.exe
install_folder
%AppData%

aes.plain

Signatures

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

VenomRAT 3 IoCs

Detects VenomRAT.

rat

Processes:

resource	yara_rule
behavioral1/memory/2548-1-0x00000000002E0000-0x00000000002F8000-memory.dmp	VenomRAT
behavioral1/files/0x0007000000019246-16.dat	VenomRAT
behavioral1/memory/2068-18-0x0000000000D10000-0x0000000000D28000-memory.dmp	VenomRAT

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral1/files/0x0007000000019246-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

WinUpdate.exe

pid	Process
2068	WinUpdate.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

Processes:

timeout.exe

pid	Process
2752	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

Processes:

schtasks.exe

pid	Process
600	schtasks.exe

Suspicious behavior: EnumeratesProcesses 52 IoCs

Processes:

143734ace32a278d89d77af8c7fdfa80.exeWinUpdate.exe

pid	Process
2548	143734ace32a278d89d77af8c7fdfa80.exe
2548	143734ace32a278d89d77af8c7fdfa80.exe
2548	143734ace32a278d89d77af8c7fdfa80.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe
2068	WinUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

143734ace32a278d89d77af8c7fdfa80.exeWinUpdate.exe

description	pid	Process
Token: SeDebugPrivilege	2548	143734ace32a278d89d77af8c7fdfa80.exe
Token: SeDebugPrivilege	2068	WinUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

WinUpdate.exe

pid	Process
2068	WinUpdate.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

143734ace32a278d89d77af8c7fdfa80.execmd.execmd.exe

description	pid	Process	procid_target
PID 2548 wrote to memory of 2328	2548	143734ace32a278d89d77af8c7fdfa80.exe	30
PID 2548 wrote to memory of 2328	2548	143734ace32a278d89d77af8c7fdfa80.exe	30
PID 2548 wrote to memory of 2328	2548	143734ace32a278d89d77af8c7fdfa80.exe	30
PID 2548 wrote to memory of 2012	2548	143734ace32a278d89d77af8c7fdfa80.exe	32
PID 2548 wrote to memory of 2012	2548	143734ace32a278d89d77af8c7fdfa80.exe	32
PID 2548 wrote to memory of 2012	2548	143734ace32a278d89d77af8c7fdfa80.exe	32
PID 2328 wrote to memory of 600	2328	cmd.exe	34
PID 2328 wrote to memory of 600	2328	cmd.exe	34
PID 2328 wrote to memory of 600	2328	cmd.exe	34
PID 2012 wrote to memory of 2752	2012	cmd.exe	35
PID 2012 wrote to memory of 2752	2012	cmd.exe	35
PID 2012 wrote to memory of 2752	2012	cmd.exe	35
PID 2012 wrote to memory of 2068	2012	cmd.exe	37
PID 2012 wrote to memory of 2068	2012	cmd.exe	37
PID 2012 wrote to memory of 2068	2012	cmd.exe	37

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\143734ace32a278d89d77af8c7fdfa80.exe
"C:\Users\Admin\AppData\Local\Temp\143734ace32a278d89d77af8c7fdfa80.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2548
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2328
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:600
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC581.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2012
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2752
- - C:\Users\Admin\AppData\Roaming\WinUpdate.exe
    "C:\Users\Admin\AppData\Roaming\WinUpdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2068

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC581.tmp.bat

Filesize
153B

MD5
e6737a6b87b6ff396d6a2657800ae453

SHA1
ec6355a733653afa44a320c334a19e9e3a856486

SHA256
4e32711d934e74fbe1d806e8b1d000a7b4e4809cc8d4a89c2142ba5c84268b85

SHA512
03d7de6db33a3ba8d75c3278d6dd36b32ade5ddc489b6c5188936a063bf32efb3769c1fe813f9305acb9c0c4c84c840b129b1febc87de8752b7caf24d274ee1b

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

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

Filesize
74KB

MD5
143734ace32a278d89d77af8c7fdfa80

SHA1
ef834bb92bb57eda87458d1a2ee3525a4b91a6ef

SHA256
1ef225d55b567e06ca8c6197aa237b76504a1a270a512b80b50280154af98146

SHA512
e894eecfa4f84dc1e0abbc07cab9faefbf4e9cdd6e4a93089970ce16d01e1db4aa3bd309281e07a36d854691852654e099eecc18244db377cc5664c458a7ce9d

Download Submit
memory/2068-18-0x0000000000D10000-0x0000000000D28000-memory.dmp

Filesize
96KB

Download
memory/2548-0-0x000007FEF6683000-0x000007FEF6684000-memory.dmp

Filesize
4KB

Download
memory/2548-1-0x00000000002E0000-0x00000000002F8000-memory.dmp

Filesize
96KB

Download
memory/2548-3-0x000007FEF6680000-0x000007FEF706C000-memory.dmp

Filesize
9.9MB

Download
memory/2548-12-0x000007FEF6680000-0x000007FEF706C000-memory.dmp

Filesize
9.9MB

Download
memory/2548-14-0x000007FEF6680000-0x000007FEF706C000-memory.dmp

Filesize
9.9MB

Download