asyncrat | cee54813009042b01b4ebd1afbf99160b0c25465b7530332ba5bb064be6eba63

General

Target

REQUEST FOR MV W-MAYFAIR.js
Size

128KB
MD5

3a084e6817bf9b361b8ff6618d767c09
SHA1

f27662987fd14d69523efec560e29c1d66a2a645
SHA256

cee54813009042b01b4ebd1afbf99160b0c25465b7530332ba5bb064be6eba63
SHA512

a49b1732ea52aff5cdf57b10ef8c46c5185805ed13a6d032b5cc0aa326a4101aa6744ac12732ed5f8c87e9ad39d8b7da8b31a4c2208eb79c97db6c9e94b0fd11
SSDEEP

3072:ool0yHnHmo2BPDf/DUGOxxVZh/O5kaUH02x2RVy:ogHmouPDf/DnYhmhPRVy

Score

10^/10

asyncrat vjw0rm default rat spyware stealer trojan worm

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

84.21.172.33:6606

84.21.172.33:7707

84.21.172.33:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Recycle Bin.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat
Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Async RAT payload 7 IoCs

rat

resource	yara_rule
behavioral1/files/0x000a0000000122ed-58.dat	asyncrat
behavioral1/files/0x000a0000000122ed-59.dat	asyncrat
behavioral1/memory/460-60-0x0000000000E40000-0x0000000000E52000-memory.dmp	asyncrat
behavioral1/files/0x00080000000122f6-68.dat	asyncrat
behavioral1/files/0x00080000000122f6-69.dat	asyncrat
behavioral1/files/0x00080000000122f6-71.dat	asyncrat
behavioral1/memory/1364-72-0x00000000010E0000-0x00000000010F2000-memory.dmp	asyncrat

Blocklisted process makes network request 16 IoCs

flow	pid	Process
4	296	wscript.exe
5	296	wscript.exe
10	296	wscript.exe
13	296	wscript.exe
14	296	wscript.exe
15	296	wscript.exe
17	296	wscript.exe
18	296	wscript.exe
19	296	wscript.exe
21	296	wscript.exe
22	296	wscript.exe
23	296	wscript.exe
25	296	wscript.exe
26	296	wscript.exe
27	296	wscript.exe
29	296	wscript.exe

Executes dropped EXE 2 IoCs

pid	Process
460	AsyncClient.exe
1364	Recycle Bin.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FtFYVjAgTz.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FtFYVjAgTz.js	wscript.exe

Loads dropped DLL 1 IoCs

pid	Process
544	cmd.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

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

T1053

pid	Process
316	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1344	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
460	AsyncClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	460	AsyncClient.exe
Token: SeDebugPrivilege	1364	Recycle Bin.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2024 wrote to memory of 296	2024	wscript.exe	28
PID 2024 wrote to memory of 296	2024	wscript.exe	28
PID 2024 wrote to memory of 296	2024	wscript.exe	28
PID 2024 wrote to memory of 460	2024	wscript.exe	29
PID 2024 wrote to memory of 460	2024	wscript.exe	29
PID 2024 wrote to memory of 460	2024	wscript.exe	29
PID 2024 wrote to memory of 460	2024	wscript.exe	29
PID 460 wrote to memory of 1832	460	AsyncClient.exe	33
PID 460 wrote to memory of 1832	460	AsyncClient.exe	33
PID 460 wrote to memory of 1832	460	AsyncClient.exe	33
PID 460 wrote to memory of 1832	460	AsyncClient.exe	33
PID 1832 wrote to memory of 316	1832	cmd.exe	35
PID 1832 wrote to memory of 316	1832	cmd.exe	35
PID 1832 wrote to memory of 316	1832	cmd.exe	35
PID 1832 wrote to memory of 316	1832	cmd.exe	35
PID 460 wrote to memory of 544	460	AsyncClient.exe	36
PID 460 wrote to memory of 544	460	AsyncClient.exe	36
PID 460 wrote to memory of 544	460	AsyncClient.exe	36
PID 460 wrote to memory of 544	460	AsyncClient.exe	36
PID 544 wrote to memory of 1344	544	cmd.exe	38
PID 544 wrote to memory of 1344	544	cmd.exe	38
PID 544 wrote to memory of 1344	544	cmd.exe	38
PID 544 wrote to memory of 1344	544	cmd.exe	38
PID 544 wrote to memory of 1364	544	cmd.exe	39
PID 544 wrote to memory of 1364	544	cmd.exe	39
PID 544 wrote to memory of 1364	544	cmd.exe	39
PID 544 wrote to memory of 1364	544	cmd.exe	39

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\REQUEST FOR MV W-MAYFAIR.js"
1⤵
- Suspicious use of WriteProcessMemory
PID:2024
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\FtFYVjAgTz.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  PID:296
- C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
  "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:460
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Recycle Bin" /tr '"C:\Users\Admin\AppData\Roaming\Recycle Bin.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1832
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Recycle Bin" /tr '"C:\Users\Admin\AppData\Roaming\Recycle Bin.exe"'
      4⤵
      Creates scheduled task(s)
      PID:316
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp14E8.tmp.bat""
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:544
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1344
  - - C:\Users\Admin\AppData\Roaming\Recycle Bin.exe
      "C:\Users\Admin\AppData\Roaming\Recycle Bin.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:1364

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe

Filesize
48KB

MD5
1b5be7647628e1de782bb8f33d369dd3

SHA1
cd6e2f240ea97d03c6c796ab3573f728d6c30d9f

SHA256
fb7bd4fd5348db2f3b763f5215e964892387af9fe83df18455432dc245f7b903

SHA512
93de4f650672705d3975ba7dd0d0901c03834117d014f91dc093ac0a26abed7737aa2344dd30bb8fd258220576d09ec15368777597d78bec9f43dfa53f67b155

Download Submit
C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe

Filesize
48KB

MD5
1b5be7647628e1de782bb8f33d369dd3

SHA1
cd6e2f240ea97d03c6c796ab3573f728d6c30d9f

SHA256
fb7bd4fd5348db2f3b763f5215e964892387af9fe83df18455432dc245f7b903

SHA512
93de4f650672705d3975ba7dd0d0901c03834117d014f91dc093ac0a26abed7737aa2344dd30bb8fd258220576d09ec15368777597d78bec9f43dfa53f67b155

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp14E8.tmp.bat

Filesize
155B

MD5
1f60ee76a720ac6e6ab1275e8d9e370b

SHA1
c0f2f19008a7c05ab6e69918bbd3d21305211bce

SHA256
ac025daa5c2452a960ba059005a7c8217323f783cd01f7935528ad03eb58d041

SHA512
f4833574fd729a51e9d1af17217062e5977204f1110e6a9c6062d65a52e2465806f9876079564657266c733b59ef8f91ba7ffeac8471dd4d0e7025c6d1132adb

Download Submit
C:\Users\Admin\AppData\Roaming\FtFYVjAgTz.js

Filesize
16KB

MD5
7586d9e4467d26fde97538eab36cf88c

SHA1
d7fcd37e0bc9e790023a38d2d470cd001f81ca92

SHA256
7aff4cbd997ad6886484076ba71d1c067931d9a1462aa16e9d2fc47b4d5b8f18

SHA512
02676bd1e1086eeae9bdec3bce065ac97267c457daf6fbd77a783d7fc81fc6f891518d6fd19dd525e84ebd25e3098614c4bbefa71ded301cd3a7a46ed2a40e0a

Download Submit
C:\Users\Admin\AppData\Roaming\Recycle Bin.exe

Filesize
48KB

MD5
1b5be7647628e1de782bb8f33d369dd3

SHA1
cd6e2f240ea97d03c6c796ab3573f728d6c30d9f

SHA256
fb7bd4fd5348db2f3b763f5215e964892387af9fe83df18455432dc245f7b903

SHA512
93de4f650672705d3975ba7dd0d0901c03834117d014f91dc093ac0a26abed7737aa2344dd30bb8fd258220576d09ec15368777597d78bec9f43dfa53f67b155

Download Submit
C:\Users\Admin\AppData\Roaming\Recycle Bin.exe

Filesize
48KB

MD5
1b5be7647628e1de782bb8f33d369dd3

SHA1
cd6e2f240ea97d03c6c796ab3573f728d6c30d9f

SHA256
fb7bd4fd5348db2f3b763f5215e964892387af9fe83df18455432dc245f7b903

SHA512
93de4f650672705d3975ba7dd0d0901c03834117d014f91dc093ac0a26abed7737aa2344dd30bb8fd258220576d09ec15368777597d78bec9f43dfa53f67b155

Download Submit
\Users\Admin\AppData\Roaming\Recycle Bin.exe

Filesize
48KB

MD5
1b5be7647628e1de782bb8f33d369dd3

SHA1
cd6e2f240ea97d03c6c796ab3573f728d6c30d9f

SHA256
fb7bd4fd5348db2f3b763f5215e964892387af9fe83df18455432dc245f7b903

SHA512
93de4f650672705d3975ba7dd0d0901c03834117d014f91dc093ac0a26abed7737aa2344dd30bb8fd258220576d09ec15368777597d78bec9f43dfa53f67b155

Download Submit
memory/460-62-0x00000000760D1000-0x00000000760D3000-memory.dmp

Filesize
8KB

Download
memory/460-60-0x0000000000E40000-0x0000000000E52000-memory.dmp

Filesize
72KB

Download
memory/1364-72-0x00000000010E0000-0x00000000010F2000-memory.dmp

Filesize
72KB

Download
memory/1364-74-0x00000000058D0000-0x000000000594E000-memory.dmp

Filesize
504KB

Download
memory/1364-75-0x0000000000670000-0x000000000067A000-memory.dmp

Filesize
40KB

Download
memory/1364-76-0x0000000005AD0000-0x0000000005B60000-memory.dmp

Filesize
576KB

Download
memory/1364-77-0x0000000000BA0000-0x0000000000C00000-memory.dmp

Filesize
384KB

Download
memory/2024-54-0x000007FEFC2D1000-0x000007FEFC2D3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads