asyncrat | 716b12fa63c467b57e24182ae3af25b738fc589f3f4f0aa5c516190f3eefbf00

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

C2

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
behavioral1/files/0x000d000000012257-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2832	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
2752	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
2440	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
576	Client.exe
576	Client.exe
576	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	576	Client.exe
Token: SeDebugPrivilege	2832	windows defender firewall required.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 576 wrote to memory of 2300	576	Client.exe	31
PID 576 wrote to memory of 2300	576	Client.exe	31
PID 576 wrote to memory of 2300	576	Client.exe	31
PID 576 wrote to memory of 768	576	Client.exe	33
PID 576 wrote to memory of 768	576	Client.exe	33
PID 576 wrote to memory of 768	576	Client.exe	33
PID 2300 wrote to memory of 2440	2300	cmd.exe	35
PID 2300 wrote to memory of 2440	2300	cmd.exe	35
PID 2300 wrote to memory of 2440	2300	cmd.exe	35
PID 768 wrote to memory of 2752	768	cmd.exe	36
PID 768 wrote to memory of 2752	768	cmd.exe	36
PID 768 wrote to memory of 2752	768	cmd.exe	36
PID 768 wrote to memory of 2832	768	cmd.exe	37
PID 768 wrote to memory of 2832	768	cmd.exe	37
PID 768 wrote to memory of 2832	768	cmd.exe	37

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:576
- 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:2300
- - 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:2440
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDC3B.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:768
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2752
- - 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:2832

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\tmpDC3B.tmp.bat

Filesize
178B

MD5
71bab9dfe37f64ad942d0e644f0dd796

SHA1
768529fa34785f77ec4a581b644d6c65864909b6

SHA256
7ec1ef2f0efd4de49c35afca40e2dd51cdbe78ba09c770277964f072fb2f7b24

SHA512
c9b7578f47af0b7e60050610204315232678b544e8443a84a3c3d3e8cd7f6186c77b0564cfa281f3b4c65a7ec74388638aa6a9ccb6ca287df8a49ecd26a8e6ff

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/576-0-0x000007FEF5B13000-0x000007FEF5B14000-memory.dmp

Filesize
4KB

Download
memory/576-1-0x0000000000240000-0x0000000000252000-memory.dmp

Filesize
72KB

Download
memory/576-2-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/576-11-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2832-16-0x0000000000ED0000-0x0000000000EE2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads