asyncrat | d36ca7e0e68cdb365995c488172b049fedf69f459a71c9a8f45b7aa75038f9fc

Analysis

max time kernel
156s
max time network
162s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
20-08-2023 21:22

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General

Target

dcr2.exe
Size

48KB
MD5

ac1f2fe1cd36ff5c4c6bfea58a6a3959
SHA1

8a6290c066c99a68bceaa16200c70c344e0f2f7d
SHA256

d36ca7e0e68cdb365995c488172b049fedf69f459a71c9a8f45b7aa75038f9fc
SHA512

68bc0f18988162a819995a5c291739e09092cb8e22e040c9b5983cada9703d9e865ff0790b940ecda5e77520eabdff97e16fd9f9f4036cfb922558048e9fe3c4
SSDEEP

768:kyF603LoILkWAt+jiiLFxh63BOih8YbIgeyVrLcys1NfvEgK/JHZVc6KN:kyF6RtiRxkhzbftVrZs1NfnkJHZVclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

127.0.0.1:8848

127.0.0.1:8858

thwit.ddns.net:8848

thwit.ddns.net:8858

Mutex

DcRatMutex_qwqdnachun

Attributes

delay
1
install
true
install_file
..\..\..\..\tmp\StartService.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/memory/2872-133-0x00000000009E0000-0x00000000009F2000-memory.dmp	asyncrat

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
652	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe
2872	dcr2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2872	dcr2.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2872 wrote to memory of 1716	2872	dcr2.exe	82
PID 2872 wrote to memory of 1716	2872	dcr2.exe	82
PID 1716 wrote to memory of 652	1716	cmd.exe	84
PID 1716 wrote to memory of 652	1716	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\dcr2.exe
"C:\Users\Admin\AppData\Local\Temp\dcr2.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2872
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "StartService" /tr '"C:\tmp\StartService.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1716
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "StartService" /tr '"C:\tmp\StartService.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:652

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

Replay Monitor

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Downloads

memory/2872-133-0x00000000009E0000-0x00000000009F2000-memory.dmp

Filesize
72KB

Download
memory/2872-134-0x00007FF9CBFC0000-0x00007FF9CCA81000-memory.dmp

Filesize
10.8MB

Download
memory/2872-135-0x0000000002AC0000-0x0000000002AD0000-memory.dmp

Filesize
64KB

Download
memory/2872-136-0x00007FF9CBFC0000-0x00007FF9CCA81000-memory.dmp

Filesize
10.8MB

Download
memory/2872-137-0x0000000002AC0000-0x0000000002AD0000-memory.dmp

Filesize
64KB

Download