asyncrat | bb227aa7b0404ccac254372c91ddf2e307526aa82ed9c4ecd3e495c38a6b4552

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
15-07-2024 08:31

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General

Target

MedicareSign/SHFolder.dll
Size

841KB
MD5

8d2c92d7cedd77f3eff8b383d5556f0c
SHA1

dcbead38c732ccfb4593a0a867f19ec9b4a9d2e7
SHA256

8df137226893144ce0b62593bd3c27874958e00cac5640e49d5d7dcfcd09d92c
SHA512

747915cb4c6f4ce8e664600b3c7cd14804c412f08fd28bbe26d31e54553f4f5669312c1267d9e4452b1516805d6716f3d952e58f327f0a07e8b392f047166ca2
SSDEEP

12288:G+ywRzslg0tInWI6wCZj6+AR2a3zCoST0DMakA/4KQd+iEtUz:dNWLjjERHfDDl4KQd+iEtUz

Score

10^/10

asyncrat default rat upx

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.2

Botnet

Default

41.216.183.111:4449

Mutex

kcnzlaqzjkle

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
behavioral6/memory/3552-3-0x00000000047C0000-0x00000000047D8000-memory.dmp	family_asyncrat

Blocklisted process makes network request 7 IoCs

flow	pid	Process
16	3552	rundll32.exe
17	3552	rundll32.exe
31	3552	rundll32.exe
36	3552	rundll32.exe
41	3552	rundll32.exe
42	3552	rundll32.exe
43	3552	rundll32.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral6/memory/3552-0-0x0000000074B20000-0x0000000074C6C000-memory.dmp	upx
behavioral6/memory/3552-13-0x0000000074B20000-0x0000000074C6C000-memory.dmp	upx

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3552	rundll32.exe
3552	rundll32.exe
3552	rundll32.exe
3552	rundll32.exe
3552	rundll32.exe
3552	rundll32.exe
3552	rundll32.exe
3552	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3552	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3552	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1076 wrote to memory of 3552	1076	rundll32.exe	84
PID 1076 wrote to memory of 3552	1076	rundll32.exe	84
PID 1076 wrote to memory of 3552	1076	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\MedicareSign\SHFolder.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1076
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\MedicareSign\SHFolder.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:3552

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/3552-0-0x0000000074B20000-0x0000000074C6C000-memory.dmp

Filesize
1.3MB

Download
memory/3552-1-0x0000000000C00000-0x0000000000D00000-memory.dmp

Filesize
1024KB

Download
memory/3552-2-0x0000000073D5E000-0x0000000073D5F000-memory.dmp

Filesize
4KB

Download
memory/3552-3-0x00000000047C0000-0x00000000047D8000-memory.dmp

Filesize
96KB

Download
memory/3552-4-0x0000000073D50000-0x0000000074500000-memory.dmp

Filesize
7.7MB

Download
memory/3552-5-0x0000000004E20000-0x00000000053C4000-memory.dmp

Filesize
5.6MB

Download
memory/3552-6-0x0000000073D50000-0x0000000074500000-memory.dmp

Filesize
7.7MB

Download
memory/3552-7-0x0000000073D50000-0x0000000074500000-memory.dmp

Filesize
7.7MB

Download
memory/3552-9-0x0000000073D50000-0x0000000074500000-memory.dmp

Filesize
7.7MB

Download
memory/3552-10-0x0000000004C70000-0x0000000004D02000-memory.dmp

Filesize
584KB

Download
memory/3552-11-0x0000000073D50000-0x0000000074500000-memory.dmp

Filesize
7.7MB

Download
memory/3552-12-0x0000000004C30000-0x0000000004C3A000-memory.dmp

Filesize
40KB

Download
memory/3552-13-0x0000000074B20000-0x0000000074C6C000-memory.dmp

Filesize
1.3MB

Download
memory/3552-14-0x0000000000C00000-0x0000000000D00000-memory.dmp

Filesize
1024KB

Download
memory/3552-15-0x0000000073D5E000-0x0000000073D5F000-memory.dmp

Filesize
4KB

Download
memory/3552-16-0x0000000073D50000-0x0000000074500000-memory.dmp

Filesize
7.7MB

Download