asyncrat | 1270491bd3068a4159eee0ad8c8d6871cf0ba80cac9fd749a7e9d1c02f6f3653

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
31-05-2023 10:11

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General

Target

SCRSHOT02.scr.exe
Size

255KB
MD5

cc54630cfed370da5d83b5c3d0ee9ec4
SHA1

d18ba6e2d8e877bc0bec89536087f49a4bf32921
SHA256

1270491bd3068a4159eee0ad8c8d6871cf0ba80cac9fd749a7e9d1c02f6f3653
SHA512

1b7a78bb5303e97cb74896d68d6094a050e8859a2b944840619ad3b589a4654d292363e3afce33a7fd2d1805ead532ba706951149a9742f5040f2252d17b695a
SSDEEP

3072:FRsjupfBVcoFDzbtu/c762soY8zyCy0A:MKxBVjF3bc/cpsoYSHA

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

iphy1.duckdns.org:8808

Mutex

AsyncMutex_6SI8OkPnkg

Attributes

delay
3
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
behavioral2/memory/2600-137-0x0000000000710000-0x0000000000722000-memory.dmp	asyncrat

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 388 set thread context of 2600	388	SCRSHOT02.scr.exe	83

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

T1053

pid	Process
4148	schtasks.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
388	SCRSHOT02.scr.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2600	vbc.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 388 wrote to memory of 2600	388	SCRSHOT02.scr.exe	83
PID 388 wrote to memory of 2600	388	SCRSHOT02.scr.exe	83
PID 388 wrote to memory of 2600	388	SCRSHOT02.scr.exe	83
PID 388 wrote to memory of 2600	388	SCRSHOT02.scr.exe	83
PID 388 wrote to memory of 2600	388	SCRSHOT02.scr.exe	83
PID 388 wrote to memory of 2600	388	SCRSHOT02.scr.exe	83
PID 388 wrote to memory of 2600	388	SCRSHOT02.scr.exe	83
PID 388 wrote to memory of 2600	388	SCRSHOT02.scr.exe	83
PID 388 wrote to memory of 4328	388	SCRSHOT02.scr.exe	84
PID 388 wrote to memory of 4328	388	SCRSHOT02.scr.exe	84
PID 388 wrote to memory of 4328	388	SCRSHOT02.scr.exe	84
PID 388 wrote to memory of 4532	388	SCRSHOT02.scr.exe	86
PID 388 wrote to memory of 4532	388	SCRSHOT02.scr.exe	86
PID 388 wrote to memory of 4532	388	SCRSHOT02.scr.exe	86
PID 4532 wrote to memory of 4148	4532	cmd.exe	88
PID 4532 wrote to memory of 4148	4532	cmd.exe	88
PID 4532 wrote to memory of 4148	4532	cmd.exe	88
PID 388 wrote to memory of 804	388	SCRSHOT02.scr.exe	89
PID 388 wrote to memory of 804	388	SCRSHOT02.scr.exe	89
PID 388 wrote to memory of 804	388	SCRSHOT02.scr.exe	89

C:\Users\Admin\AppData\Local\Temp\SCRSHOT02.scr.exe
"C:\Users\Admin\AppData\Local\Temp\SCRSHOT02.scr.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:388
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2600
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Roaming\winpr01"
  2⤵
  PID:4328
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\winpr01\winpr01.exe'" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4532
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\winpr01\winpr01.exe'" /f
    3⤵
    - Creates scheduled task(s)
    PID:4148
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\SCRSHOT02.scr.exe" "C:\Users\Admin\AppData\Roaming\winpr01\winpr01.exe"
  2⤵
  PID:804

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Scripting

T1064

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/388-133-0x0000000000D00000-0x0000000000D46000-memory.dmp

Filesize
280KB

Download
memory/388-134-0x0000000005640000-0x0000000005650000-memory.dmp

Filesize
64KB

Download
memory/388-135-0x0000000005C00000-0x00000000061A4000-memory.dmp

Filesize
5.6MB

Download
memory/2600-137-0x0000000000710000-0x0000000000722000-memory.dmp

Filesize
72KB

Download
memory/2600-139-0x0000000004CE0000-0x0000000004CF0000-memory.dmp

Filesize
64KB

Download
memory/2600-140-0x0000000004CF0000-0x0000000004D56000-memory.dmp

Filesize
408KB

Download
memory/2600-141-0x0000000005110000-0x00000000051AC000-memory.dmp

Filesize
624KB

Download
memory/2600-142-0x0000000004CE0000-0x0000000004CF0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads