asyncrat | dca4f9884f0b0f5a1c534b3b2d867714b6ea7eac807bacf9e487e9a8d7e34355

General

Target

Client.exe
Size

74KB
MD5

4e621ed074da8d121a8f419c00cb4c3a
SHA1

723df7256adbaddecf269abfd255d28b5b860f1e
SHA256

dca4f9884f0b0f5a1c534b3b2d867714b6ea7eac807bacf9e487e9a8d7e34355
SHA512

77ebc87c1582d1f83195d2dd0f76432f895acac7b07cb1bca6599d7c42d83a544abcf719d9d80fc6e51cda05c6d9e3af06daed17a8fe970425030ab5fd0aaa1f
SSDEEP

1536:SUaAcx2l/Cx2PMVie9VdQuDI6H1bf/k0WQzcuLVclN:SUDcx2Bq2PMVie9VdQsH1bfcjQnBY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

127.0.0.1:4449

5.20.104.111:4449

Mutex

kekagthwfcue

Attributes

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

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x002200000002aaf6-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
3560	defender.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
1732	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
4744	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3864	Client.exe
3560	defender.exe
3560	defender.exe
3560	defender.exe
3560	defender.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3864	Client.exe
Token: SeDebugPrivilege	3560	defender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3560	defender.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3864 wrote to memory of 1972	3864	Client.exe	77
PID 3864 wrote to memory of 1972	3864	Client.exe	77
PID 3864 wrote to memory of 3008	3864	Client.exe	79
PID 3864 wrote to memory of 3008	3864	Client.exe	79
PID 1972 wrote to memory of 4744	1972	cmd.exe	81
PID 1972 wrote to memory of 4744	1972	cmd.exe	81
PID 3008 wrote to memory of 1732	3008	cmd.exe	82
PID 3008 wrote to memory of 1732	3008	cmd.exe	82
PID 3008 wrote to memory of 3560	3008	cmd.exe	83
PID 3008 wrote to memory of 3560	3008	cmd.exe	83

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\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3864
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "defender" /tr '"C:\Users\Admin\AppData\Roaming\defender.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1972
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "defender" /tr '"C:\Users\Admin\AppData\Roaming\defender.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4744
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBB03.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3008
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1732
- - C:\Users\Admin\AppData\Roaming\defender.exe
    "C:\Users\Admin\AppData\Roaming\defender.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpBB03.tmp.bat

Filesize
152B

MD5
f91da71c9887a505e57042f322b8cfd9

SHA1
8ad8b3dd0a35e34211136bd6b8ea05ba36dc28a0

SHA256
4883e0fbf9481f1abe48eab0b0772a8eff89466079536b67cf0712d643cb87de

SHA512
84ef688f7b7939e40140b63a78e13336f259a0ad77bb8f66152015971ec0cff510530c81e0c887b2e2b2145a809f32d345bc60455d3d7cf1bb7196389d75e385

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\defender.exe

Filesize
74KB

MD5
4e621ed074da8d121a8f419c00cb4c3a

SHA1
723df7256adbaddecf269abfd255d28b5b860f1e

SHA256
dca4f9884f0b0f5a1c534b3b2d867714b6ea7eac807bacf9e487e9a8d7e34355

SHA512
77ebc87c1582d1f83195d2dd0f76432f895acac7b07cb1bca6599d7c42d83a544abcf719d9d80fc6e51cda05c6d9e3af06daed17a8fe970425030ab5fd0aaa1f

Download Submit
memory/3864-0-0x00007FFBD8453000-0x00007FFBD8455000-memory.dmp

Filesize
8KB

Download
memory/3864-1-0x0000000000EC0000-0x0000000000ED8000-memory.dmp

Filesize
96KB

Download
memory/3864-3-0x00007FFBD8450000-0x00007FFBD8F12000-memory.dmp

Filesize
10.8MB

Download
memory/3864-4-0x00007FFBD8450000-0x00007FFBD8F12000-memory.dmp

Filesize
10.8MB

Download
memory/3864-9-0x00007FFBD8450000-0x00007FFBD8F12000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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