asyncrat | 716b12fa63c467b57e24182ae3af25b738fc589f3f4f0aa5c516190f3eefbf00

Resubmissions

07/12/2024, 15:27

241207-svzd1swncx 10

07/12/2024, 14:25

241207-rrbm4szpdq 10

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
07/12/2024, 14:25

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General

Target

Client.exe
Size

48KB
MD5

77ca225fb7c84aad1e8ee9ead0110b4c
SHA1

b26e40f8e945f4db6621d7ca5a575a84c0565f91
SHA256

716b12fa63c467b57e24182ae3af25b738fc589f3f4f0aa5c516190f3eefbf00
SHA512

e8f2138cd82714ba58a30d9b48c7e61a6c42b17db297c332e078db544575404382ccf16dbd5bd0aced9342186b05b65a1da0426062b10729a40123a5887e3bbb
SSDEEP

768:ywpRILv+sx+LiEtelDSN+iV08YbygeYslsoo7RSYFr0bvEgK/JfZVc6KN:ywcpEtKDs4zb10rqjF4nkJfZVclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

127.0.0.1:8848

127.0.0.1:59953

fojeweb571-59953.portmap.host:8848

fojeweb571-59953.portmap.host:59953

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
windows defender firewall required.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
behavioral3/files/0x001e00000002aabf-10.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4240	windows defender firewall required.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
3536	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
2072	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe
2012	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2012	Client.exe
Token: SeDebugPrivilege	4240	windows defender firewall required.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 4228	2012	Client.exe	77
PID 2012 wrote to memory of 4228	2012	Client.exe	77
PID 2012 wrote to memory of 4504	2012	Client.exe	79
PID 2012 wrote to memory of 4504	2012	Client.exe	79
PID 4228 wrote to memory of 2072	4228	cmd.exe	81
PID 4228 wrote to memory of 2072	4228	cmd.exe	81
PID 4504 wrote to memory of 3536	4504	cmd.exe	82
PID 4504 wrote to memory of 3536	4504	cmd.exe	82
PID 4504 wrote to memory of 4240	4504	cmd.exe	83
PID 4504 wrote to memory of 4240	4504	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:2012
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall required" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4228
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall required" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2072
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp74F1.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4504
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3536
- - C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe
    "C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4240

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\tmp74F1.tmp.bat

Filesize
178B

MD5
19365438f5059b2d6c35033cb7fabad0

SHA1
348e684f63a41cd5cc18bea2e9a989f540a41344

SHA256
329000d62aa6eac4719692f42d08697bc0273563cc3dcef494f5908d8d1ac36d

SHA512
38184735cd75d1c39b9d8c4953e6f096ac8d1fc3d7177356d9017c377c7ce6d4d8611a77784640f0dd9947a46d6e30415874437712cc386b2ef7336a792cb4d1

Download Submit
C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe

Filesize
48KB

MD5
77ca225fb7c84aad1e8ee9ead0110b4c

SHA1
b26e40f8e945f4db6621d7ca5a575a84c0565f91

SHA256
716b12fa63c467b57e24182ae3af25b738fc589f3f4f0aa5c516190f3eefbf00

SHA512
e8f2138cd82714ba58a30d9b48c7e61a6c42b17db297c332e078db544575404382ccf16dbd5bd0aced9342186b05b65a1da0426062b10729a40123a5887e3bbb

Download Submit
memory/2012-0-0x00007FFEE8773000-0x00007FFEE8775000-memory.dmp

Filesize
8KB

Download
memory/2012-1-0x0000000000A30000-0x0000000000A42000-memory.dmp

Filesize
72KB

Download
memory/2012-2-0x00007FFEE8770000-0x00007FFEE9232000-memory.dmp

Filesize
10.8MB

Download
memory/2012-7-0x00007FFEE8770000-0x00007FFEE9232000-memory.dmp

Filesize
10.8MB

Download