asyncrat | a7b2894e48d292b192b8f33a3968c9b2c42e215b18d0b6ec91e4412d319f5608

General

Target

WaveInstaller.exe
Size

249KB
MD5

247af4e0a1a0d20bb625ece6439ee87d
SHA1

28ad251bb0db405924834583c216db028373c681
SHA256

a7b2894e48d292b192b8f33a3968c9b2c42e215b18d0b6ec91e4412d319f5608
SHA512

b4c87d609821173559cf5fcef7e2dfeb444a63f0222367e28bfd83c2f29ff33d0588fa6b4dd74402ccc502dd97ea4f6f489295d186ca3add5d5e40876c616142
SSDEEP

3072:+/H6zbxSl+GLAsNeDF5nI0PGIj9lua/Obw0hFv2PCWpIdNrY:yazbYlx0sNOBTunbw0/5Wpi

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

https://ooo.fluffiflower.xyz/:8848

ooo.fluffiflower.xyz:8848

2.132.191.110:8848

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
Explorer.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 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000b00000002342d-10.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-701583114-2636601053-947405450-1000\Control Panel\International\Geo\Nation	WaveInstaller.exe

Executes dropped EXE 1 IoCs

pid	Process
1148	Explorer.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
2596	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
2376	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe
2492	WaveInstaller.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2492	WaveInstaller.exe
Token: SeDebugPrivilege	1148	Explorer.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2492 wrote to memory of 1908	2492	WaveInstaller.exe	86
PID 2492 wrote to memory of 1908	2492	WaveInstaller.exe	86
PID 2492 wrote to memory of 532	2492	WaveInstaller.exe	87
PID 2492 wrote to memory of 532	2492	WaveInstaller.exe	87
PID 532 wrote to memory of 2596	532	cmd.exe	90
PID 532 wrote to memory of 2596	532	cmd.exe	90
PID 1908 wrote to memory of 2376	1908	cmd.exe	91
PID 1908 wrote to memory of 2376	1908	cmd.exe	91
PID 532 wrote to memory of 1148	532	cmd.exe	92
PID 532 wrote to memory of 1148	532	cmd.exe	92

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\WaveInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\WaveInstaller.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2492
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Explorer" /tr '"C:\Users\Admin\AppData\Roaming\Explorer.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1908
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Explorer" /tr '"C:\Users\Admin\AppData\Roaming\Explorer.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2376
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF1D2.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:532
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2596
- - C:\Users\Admin\AppData\Roaming\Explorer.exe
    "C:\Users\Admin\AppData\Roaming\Explorer.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1148

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpF1D2.tmp.bat

Filesize
152B

MD5
8e76100e0d75fc683aa945b053defdbf

SHA1
b9d591a174eb2c48c3190349b3986b35823854f3

SHA256
caa288fd43c8cfd8711468084747c2ce9eb764c5449038514620e7151b4cd1ae

SHA512
76ee83c5abfca1ef88d54a24a5728a7b318e146630ba40131239f4a8b345f55b9b8971e0506e50ea8f0b5f0a6dc67b488c4361a0d5549e69d9a97cf835c321fc

Download Submit
C:\Users\Admin\AppData\Roaming\Explorer.exe

Filesize
249KB

MD5
247af4e0a1a0d20bb625ece6439ee87d

SHA1
28ad251bb0db405924834583c216db028373c681

SHA256
a7b2894e48d292b192b8f33a3968c9b2c42e215b18d0b6ec91e4412d319f5608

SHA512
b4c87d609821173559cf5fcef7e2dfeb444a63f0222367e28bfd83c2f29ff33d0588fa6b4dd74402ccc502dd97ea4f6f489295d186ca3add5d5e40876c616142

Download Submit
memory/2492-0-0x00007FFD376E3000-0x00007FFD376E5000-memory.dmp

Filesize
8KB

Download
memory/2492-1-0x00000000000A0000-0x00000000000E4000-memory.dmp

Filesize
272KB

Download
memory/2492-2-0x00007FFD376E0000-0x00007FFD381A1000-memory.dmp

Filesize
10.8MB

Download
memory/2492-7-0x00007FFD376E0000-0x00007FFD381A1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads