asyncrat | c89e2b54f3c5d87685524102f4a03430e99d41ff6541c99e97b379ab7f5a413c

Resubmissions

04/05/2024, 10:29

240504-mjf6eabb9110

04/05/2024, 09:56

240504-lysmbaae8y10

Analysis

max time kernel
141s
max time network
151s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
04/05/2024, 10:29

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General

Target
Vulcan1.5 BETA/Vulcan1.5.exe
Size 78KB
Sample240504-mjf6eabb91
SHA256 73daf4be0b78f20916eb75bdcf49c55445f24d6966ebb63e27fee354dc670d52
MD5 282462fa1cf7592d82b8bc63f8cca024
SHA1 f6d4d971d4bac357ae22a74f68a55b557d5ac69d
SHA512 b36cd8b0fef03994eb94376ccd09984d50b7e445955accfb6096c696e5219a036ba1e99c6a230045a83d3ae48a3e188b208f96c6395a7ed1567b52822bd806f8
SSDEEP 1536:1EDhxf8JYs1rRb64YUbah9IuuuNIEMdpqKmY7:iH8qeYUbaV1IEMGz
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:3232
192.168.0.194:3232

Attributes

delay
4
install
true
install_file
sys1.exe
install_folder
%Temp%

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
behavioral11/files/0x000d0000000144e9-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2648	sys1.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2400	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2868	timeout.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2160	Vulcan1.5.exe
2160	Vulcan1.5.exe
2160	Vulcan1.5.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2160	Vulcan1.5.exe
Token: SeDebugPrivilege	2648	sys1.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2160 wrote to memory of 2472	2160	Vulcan1.5.exe	29
PID 2160 wrote to memory of 2472	2160	Vulcan1.5.exe	29
PID 2160 wrote to memory of 2472	2160	Vulcan1.5.exe	29
PID 2160 wrote to memory of 2484	2160	Vulcan1.5.exe	31
PID 2160 wrote to memory of 2484	2160	Vulcan1.5.exe	31
PID 2160 wrote to memory of 2484	2160	Vulcan1.5.exe	31
PID 2472 wrote to memory of 2400	2472	cmd.exe	32
PID 2472 wrote to memory of 2400	2472	cmd.exe	32
PID 2472 wrote to memory of 2400	2472	cmd.exe	32
PID 2484 wrote to memory of 2868	2484	cmd.exe	34
PID 2484 wrote to memory of 2868	2484	cmd.exe	34
PID 2484 wrote to memory of 2868	2484	cmd.exe	34
PID 2484 wrote to memory of 2648	2484	cmd.exe	35
PID 2484 wrote to memory of 2648	2484	cmd.exe	35
PID 2484 wrote to memory of 2648	2484	cmd.exe	35

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\Vulcan1.5 BETA\Vulcan1.5.exe
"C:\Users\Admin\AppData\Local\Temp\Vulcan1.5 BETA\Vulcan1.5.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "sys1" /tr '"C:\Users\Admin\AppData\Local\Temp\sys1.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2472
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "sys1" /tr '"C:\Users\Admin\AppData\Local\Temp\sys1.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:2400
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp24DF.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2484
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2868
- - C:\Users\Admin\AppData\Local\Temp\sys1.exe
    "C:\Users\Admin\AppData\Local\Temp\sys1.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

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

sys1.exe

Path C:\Users\Admin\AppData\Local\Temp\sys1.exe
Size 78KB
SHA256 73daf4be0b78f20916eb75bdcf49c55445f24d6966ebb63e27fee354dc670d52
MD5 282462fa1cf7592d82b8bc63f8cca024
SHA1 f6d4d971d4bac357ae22a74f68a55b557d5ac69d
SHA512 b36cd8b0fef03994eb94376ccd09984d50b7e445955accfb6096c696e5219a036ba1e99c6a230045a83d3ae48a3e188b208f96c6395a7ed1567b52822bd806f8
SSDEEP 1536:1EDhxf8JYs1rRb64YUbah9IuuuNIEMdpqKmY7:iH8qeYUbaV1IEMGz
MD5 SHA1 SHA512 SSDEEP

Submit Download

tmp24DF.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp24DF.tmp.bat
Size 151B
SHA256 ed1abf4301e6c5e3c414c4bf835dfdc0b5ebea447949118500f347f8e03ebdda
MD5 9764004e9ce628f9d1807b4ef19572c4
SHA1 f28ecdda1479fcafb6a952710f27ea8846616673
SHA512 2754cea5878764839905d5c6ebeabf7f5dfe98b4f8bb2922a3e969879c72d88e5c39e358c0feed499d3635ba85ddd574e441be535bf6d6faf08f0983c81768ff
MD5 SHA1 SHA512

Submit Download

memory/2160-0-0x000007FEF57A3000-0x000007FEF57A4000-memory.dmp

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memory/2160-1-0x0000000000BB0000-0x0000000000BCA000-memory.dmp

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memory/2160-2-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

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memory/2160-3-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

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memory/2160-13-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

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memory/2648-17-0x0000000000DD0000-0x0000000000DEA000-memory.dmp

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