asyncrat | 408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068

Analysis

max time kernel
148s
max time network
16s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
05-08-2024 01:20

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General

Target

408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe
Size

74KB
MD5

415479c03f59ed169402224d1bf7a158
SHA1

3306a80290079a971df35eb037dd900865ccad0f
SHA256

408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068
SHA512

4db90ce9f90100c7e9b7c637b6c1b8615d2cdaaf8e043d03bd1801069abdd457403e01cbf3f97d452128d68267d95c09e3105062f4ea47dd4997d45e504eaa9c
SSDEEP

1536:zUt8cxqnHXC56PMV953pIZlyH1bo/MDT0Mz5QzckTtVclN:zUOcxq3O6PMV3slyH1bo0DT0Mz5QhT/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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0031000000016d1b-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2908	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

pid	Process
2992	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
3004	schtasks.exe

Suspicious behavior: EnumeratesProcesses 52 IoCs

pid	Process
1368	408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe
1368	408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe
1368	408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe
2908	WinUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1368	408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe
Token: SeDebugPrivilege	2908	WinUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2908	WinUpdate.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1368 wrote to memory of 2244	1368	408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe	30
PID 1368 wrote to memory of 2244	1368	408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe	30
PID 1368 wrote to memory of 2244	1368	408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe	30
PID 1368 wrote to memory of 2732	1368	408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe	32
PID 1368 wrote to memory of 2732	1368	408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe	32
PID 1368 wrote to memory of 2732	1368	408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe	32
PID 2244 wrote to memory of 3004	2244	cmd.exe	34
PID 2244 wrote to memory of 3004	2244	cmd.exe	34
PID 2244 wrote to memory of 3004	2244	cmd.exe	34
PID 2732 wrote to memory of 2992	2732	cmd.exe	35
PID 2732 wrote to memory of 2992	2732	cmd.exe	35
PID 2732 wrote to memory of 2992	2732	cmd.exe	35
PID 2732 wrote to memory of 2908	2732	cmd.exe	36
PID 2732 wrote to memory of 2908	2732	cmd.exe	36
PID 2732 wrote to memory of 2908	2732	cmd.exe	36

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\408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe
"C:\Users\Admin\AppData\Local\Temp\408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1368
- 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:2244
- - 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:3004
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp6799.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2732
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2992
- - 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:2908

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\tmp6799.tmp.bat

Filesize
153B

MD5
f679f75e6eae0974e427e0120603f1a0

SHA1
e34a33e3dc132e95e2f08c50942c7bba21681a5e

SHA256
eedf3c117d2f10b0bc51d09ec14b80f02a5ce4bc26abbf985cf006e318808d6b

SHA512
fe167375b83b1953b57aed1f26e5e1b08329d0390cb03f93dd6ac8c603960dd0624d018b38ce7bdedf560b4332861d503efdab90f81fffd5e611cf970a1bd401

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
415479c03f59ed169402224d1bf7a158

SHA1
3306a80290079a971df35eb037dd900865ccad0f

SHA256
408c4cb78449baf846592637c9a8f03f47c3df6786acdce6e9ad0ef0db370068

SHA512
4db90ce9f90100c7e9b7c637b6c1b8615d2cdaaf8e043d03bd1801069abdd457403e01cbf3f97d452128d68267d95c09e3105062f4ea47dd4997d45e504eaa9c

Download Submit
memory/1368-0-0x000007FEF5DD3000-0x000007FEF5DD4000-memory.dmp

Filesize
4KB

Download
memory/1368-1-0x00000000012C0000-0x00000000012D8000-memory.dmp

Filesize
96KB

Download
memory/1368-3-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/1368-12-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/1368-14-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/2908-18-0x0000000001230000-0x0000000001248000-memory.dmp

Filesize
96KB

Download