asyncrat | b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827

Analysis

max time kernel
130s
max time network
133s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
10/08/2023, 16:46

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General

Target
b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe
Size 74KB
Sample230810-vaaw2agh8w
SHA256 b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827
MD5 6ee2b1661840f3cb6e3279761d81b892
SHA1 7a446b124fc3fbf86ecc7b8459a6ddd03a10bbdb
SHA512 adc25f26f4e32c9252dda4d04dcc9999c81ada753a47bfe07c68faa920cdf2b79033ee8dc8fecb38ba7234b995c683322ff8c299c4cca1f6426dff0552cb8d0f
SSDEEP 1536:bUCQcx7RjCnGPMV5lxrEL8UIvH1bhwsLP7CQzc+LVclN:bUDcx7pMGPMVVFVH1bhRjCQXBY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

147.185.221.16:10735

Mutex

wat8758zjtzhrtgh445gk8p

Attributes

delay
1
install
true
install_file
WindowsCleaner.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 4 IoCs

rat

resource	yara_rule
behavioral1/memory/2832-54-0x0000000000A40000-0x0000000000A58000-memory.dmp	asyncrat
behavioral1/files/0x00330000000146c6-71.dat	asyncrat
behavioral1/files/0x00330000000146c6-72.dat	asyncrat
behavioral1/memory/2684-73-0x0000000000BD0000-0x0000000000BE8000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2684	WindowsCleaner.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
2420	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2592	timeout.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2832	b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe
2832	b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe
2684	WindowsCleaner.exe
2684	WindowsCleaner.exe
2684	WindowsCleaner.exe
2684	WindowsCleaner.exe
2684	WindowsCleaner.exe
2684	WindowsCleaner.exe
2684	WindowsCleaner.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2832	b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe
Token: SeDebugPrivilege	2684	WindowsCleaner.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2684	WindowsCleaner.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2832 wrote to memory of 2164	2832	b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe	28
PID 2832 wrote to memory of 2164	2832	b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe	28
PID 2832 wrote to memory of 2164	2832	b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe	28
PID 2832 wrote to memory of 2896	2832	b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe	29
PID 2832 wrote to memory of 2896	2832	b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe	29
PID 2832 wrote to memory of 2896	2832	b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe	29
PID 2164 wrote to memory of 2420	2164	cmd.exe	32
PID 2164 wrote to memory of 2420	2164	cmd.exe	32
PID 2164 wrote to memory of 2420	2164	cmd.exe	32
PID 2896 wrote to memory of 2592	2896	cmd.exe	33
PID 2896 wrote to memory of 2592	2896	cmd.exe	33
PID 2896 wrote to memory of 2592	2896	cmd.exe	33
PID 2896 wrote to memory of 2684	2896	cmd.exe	34
PID 2896 wrote to memory of 2684	2896	cmd.exe	34
PID 2896 wrote to memory of 2684	2896	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe
"C:\Users\Admin\AppData\Local\Temp\b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827exe_JC.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2832
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WindowsCleaner" /tr '"C:\Users\Admin\AppData\Roaming\WindowsCleaner.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2164
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "WindowsCleaner" /tr '"C:\Users\Admin\AppData\Roaming\WindowsCleaner.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:2420
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp7742.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2896
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2592
- - C:\Users\Admin\AppData\Roaming\WindowsCleaner.exe
    "C:\Users\Admin\AppData\Roaming\WindowsCleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2684

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp7742.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7742.tmp.bat
Size 158B
SHA256 0163bc0907347137fd74a645efec8be4e1f4be874c4cfa0bac91edf234c8aaba
MD5 d8ac2509764d8775e2f442bed40831bc
SHA1 b6c01f2c199c1716c7d844fe96008a6618326488
SHA512 9fffbebe6a288b6984d8dea79ae288a3ef478c7400449f1cbe929ca48f0b90a3cdf7de1a46958c89e2d5518d227c063b844e7a4a5651b27553616929b1e0eec3
MD5 SHA1 SHA512

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tmp7742.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7742.tmp.bat
Size 158B
SHA256 0163bc0907347137fd74a645efec8be4e1f4be874c4cfa0bac91edf234c8aaba
MD5 d8ac2509764d8775e2f442bed40831bc
SHA1 b6c01f2c199c1716c7d844fe96008a6618326488
SHA512 9fffbebe6a288b6984d8dea79ae288a3ef478c7400449f1cbe929ca48f0b90a3cdf7de1a46958c89e2d5518d227c063b844e7a4a5651b27553616929b1e0eec3
MD5 SHA1 SHA512

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DataLogs.conf

Path C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
Size 8B
SHA256 c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
MD5 cf759e4c5f14fe3eec41b87ed756cea8
SHA1 c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA512 c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b
MD5 SHA1 SHA512

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WindowsCleaner.exe

Path C:\Users\Admin\AppData\Roaming\WindowsCleaner.exe
Size 74KB
SHA256 b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827
MD5 6ee2b1661840f3cb6e3279761d81b892
SHA1 7a446b124fc3fbf86ecc7b8459a6ddd03a10bbdb
SHA512 adc25f26f4e32c9252dda4d04dcc9999c81ada753a47bfe07c68faa920cdf2b79033ee8dc8fecb38ba7234b995c683322ff8c299c4cca1f6426dff0552cb8d0f
SSDEEP 1536:bUCQcx7RjCnGPMV5lxrEL8UIvH1bhwsLP7CQzc+LVclN:bUDcx7pMGPMVVFVH1bhRjCQXBY
MD5 SHA1 SHA512 SSDEEP

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WindowsCleaner.exe

Path C:\Users\Admin\AppData\Roaming\WindowsCleaner.exe
Size 74KB
SHA256 b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827
MD5 6ee2b1661840f3cb6e3279761d81b892
SHA1 7a446b124fc3fbf86ecc7b8459a6ddd03a10bbdb
SHA512 adc25f26f4e32c9252dda4d04dcc9999c81ada753a47bfe07c68faa920cdf2b79033ee8dc8fecb38ba7234b995c683322ff8c299c4cca1f6426dff0552cb8d0f
SSDEEP 1536:bUCQcx7RjCnGPMV5lxrEL8UIvH1bhwsLP7CQzc+LVclN:bUDcx7pMGPMVVFVH1bhRjCQXBY
MD5 SHA1 SHA512 SSDEEP

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memory/2684-74-0x000007FEF4FC0000-0x000007FEF59AC000-memory.dmp

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memory/2684-73-0x0000000000BD0000-0x0000000000BE8000-memory.dmp

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memory/2684-76-0x00000000023B0000-0x0000000002430000-memory.dmp

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memory/2684-77-0x0000000077560000-0x0000000077709000-memory.dmp

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memory/2684-78-0x000007FEF4FC0000-0x000007FEF59AC000-memory.dmp

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memory/2684-79-0x00000000023B0000-0x0000000002430000-memory.dmp

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memory/2684-80-0x0000000077560000-0x0000000077709000-memory.dmp

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memory/2832-68-0x000007FEF59B0000-0x000007FEF639C000-memory.dmp

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memory/2832-69-0x0000000077560000-0x0000000077709000-memory.dmp

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memory/2832-54-0x0000000000A40000-0x0000000000A58000-memory.dmp

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memory/2832-57-0x000000001AEE0000-0x000000001AF60000-memory.dmp

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memory/2832-55-0x000007FEF59B0000-0x000007FEF639C000-memory.dmp

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memory/2832-58-0x0000000077560000-0x0000000077709000-memory.dmp

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