asyncrat | 0b7987bd9f7cbee60c4c809f22ecda6f314a0366f0704ed474626ac5f7af3521

Resubmissions

08-08-2024 08:56

240808-kv41havgjh 10

08-08-2024 08:55

240808-kvncravgjb 10

08-08-2024 08:48

240808-kqyypavfpg 10

Analysis

max time kernel
2s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
08-08-2024 08:55

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General

Target

Shellbag anylizer.exe
Size

247KB
MD5

851269fc86de5d91e5f2db1b2b34cb6e
SHA1

6103dab45c98bddef65b6eed235a60159d458526
SHA256

0b7987bd9f7cbee60c4c809f22ecda6f314a0366f0704ed474626ac5f7af3521
SHA512

c01c7d2ec52d55ece6f88eeb9c5ecf260ef9b59fd3f08ad42e4ed582b24bd482fcfd334375177b032564f567af6d195f7627249abe1e428f52f6c2806783acfc
SSDEEP

6144:/bwmPMVWrVbVPwF9kfK8rpClz0KBb6o589GHWHWujiSPbp:/bw8n5gBuj/PV

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

Mutex

zedtklncvg

Attributes

delay
1
install
true
install_file
update.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/f2T8NYnM

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
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
4104	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
4076	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe
3304	Shellbag anylizer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3304	Shellbag anylizer.exe
Token: SeDebugPrivilege	3304	Shellbag anylizer.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3304 wrote to memory of 2660	3304	Shellbag anylizer.exe	79
PID 3304 wrote to memory of 2660	3304	Shellbag anylizer.exe	79
PID 3304 wrote to memory of 3388	3304	Shellbag anylizer.exe	81
PID 3304 wrote to memory of 3388	3304	Shellbag anylizer.exe	81
PID 3388 wrote to memory of 4104	3388	cmd.exe	83
PID 3388 wrote to memory of 4104	3388	cmd.exe	83
PID 2660 wrote to memory of 4076	2660	cmd.exe	84
PID 2660 wrote to memory of 4076	2660	cmd.exe	84

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\Shellbag anylizer.exe
"C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3304
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2660
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4076
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9049.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3388
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4104

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9049.tmp.bat

Filesize
150B

MD5
4674ffcd716ed82525e7f96d0f685d37

SHA1
4809d9f4ef4631f6cbbdf449e7b1f38a0978ca75

SHA256
fed6c26064e56432a9a9b6956dcbd7612862b16d7b91e2a461f07245d2abcdd5

SHA512
f295c7735271bf03c0b5e271640c7e77fce158e5620ad3265a5681faf14e7e49a3acee2fae1e071805dd601d0a3d12c1e4a603bd55db7e563d66b6a718012788

Download Submit
memory/3304-0-0x00007FFED1023000-0x00007FFED1025000-memory.dmp

Filesize
8KB

Download
memory/3304-1-0x00000000005B0000-0x00000000005F4000-memory.dmp

Filesize
272KB

Download
memory/3304-3-0x00007FFED1020000-0x00007FFED1AE2000-memory.dmp

Filesize
10.8MB

Download
memory/3304-4-0x00007FFED1020000-0x00007FFED1AE2000-memory.dmp

Filesize
10.8MB

Download
memory/3304-9-0x00007FFED1020000-0x00007FFED1AE2000-memory.dmp

Filesize
10.8MB

Download