asyncrat | ba71397fd0c45b5eea93d3c53291dea0428046e1eda081fe4bbe10065b50f1af

Analysis

max time kernel
144s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21/03/2025, 10:00

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General

Target

Purchase_Order#29758-86548.js
Size

563KB
MD5

ab0dac9d1b9b83383dbc5d469d5fa1ae
SHA1

b15b24f82ef0a07fce5b7c2735d8a8b46b547287
SHA256

398e3d3d2ad8e2e91693c1682780d2352ebe962b67547af5c20735ae97ea94a9
SHA512

66829799b8233f142aa1420f1e2dd4dfbdc3f2417279b12481d87612a0d97add61d819e58c369818ac201a4ba568e92d5fcd4b9ce17fb68332eeb5718f2f72fc
SSDEEP

3072:MCAFTI3Ws7WZ4hRPhts7YRw7Xx5FzNM6x/P0UHD2yQ/ry:MCAFs3F7WZIhe7nbDIxu

Score

10^/10

asyncrat wshrat march-25 discovery execution persistence rat trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

March-25

chongmei33.publicvm.com:2703

chongmei33.publicvm.com:7031

umarmira055.duckdns.org:2703

umarmira055.duckdns.org:7031

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
WindowsUpdate.exe
install_folder
%Temp%

aes.plain

Extracted

Family

wshrat

http://chongmei33.myddns.rocks:7044

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat
WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat
Wshrat family
wshrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x00060000000194c9-16.dat	family_asyncrat

Blocklisted process makes network request 26 IoCs

flow	pid	Process
5	2920	wscript.exe
6	2920	wscript.exe
9	2920	wscript.exe
15	2920	wscript.exe
16	2920	wscript.exe
17	2920	wscript.exe
19	2920	wscript.exe
20	2920	wscript.exe
21	2920	wscript.exe
23	2920	wscript.exe
24	2920	wscript.exe
25	2920	wscript.exe
27	2920	wscript.exe
28	2920	wscript.exe
29	2920	wscript.exe
31	2920	wscript.exe
32	2920	wscript.exe
33	2920	wscript.exe
35	2920	wscript.exe
36	2920	wscript.exe
37	2920	wscript.exe
39	2920	wscript.exe
40	2920	wscript.exe
41	2920	wscript.exe
43	2920	wscript.exe
44	2920	wscript.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
3024	RDo.exe
740	WindowsUpdate.exe

Loads dropped DLL 1 IoCs

pid	Process
2668	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\adobe = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\adobe.js\""	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\adobe = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\adobe.js\""	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\adobe = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\adobe.js\""	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\adobe = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\adobe.js\""	wscript.exe

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WindowsUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RDo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1796	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2008	schtasks.exe

Script User-Agent 26 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	6	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	16	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	17	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	21	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	25	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	27	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	29	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	35	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	9	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	20	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	28	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	33	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	36	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	37	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	39	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	43	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	5	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	19	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	23	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	24	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	40	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	44	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	15	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	31	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	32	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript
HTTP User-Agent header	41	WSHRAT\|00BEA431\|ZQABOPWE\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 21/3/2025\|JavaScript

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3024	RDo.exe
3024	RDo.exe
3024	RDo.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3024	RDo.exe
Token: SeDebugPrivilege	740	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 3012 wrote to memory of 2488	3012	wscript.exe	30
PID 3012 wrote to memory of 2488	3012	wscript.exe	30
PID 3012 wrote to memory of 2488	3012	wscript.exe	30
PID 3012 wrote to memory of 2076	3012	wscript.exe	31
PID 3012 wrote to memory of 2076	3012	wscript.exe	31
PID 3012 wrote to memory of 2076	3012	wscript.exe	31
PID 2488 wrote to memory of 2920	2488	WScript.exe	32
PID 2488 wrote to memory of 2920	2488	WScript.exe	32
PID 2488 wrote to memory of 2920	2488	WScript.exe	32
PID 2076 wrote to memory of 3024	2076	WScript.exe	33
PID 2076 wrote to memory of 3024	2076	WScript.exe	33
PID 2076 wrote to memory of 3024	2076	WScript.exe	33
PID 2076 wrote to memory of 3024	2076	WScript.exe	33
PID 3024 wrote to memory of 484	3024	RDo.exe	36
PID 3024 wrote to memory of 484	3024	RDo.exe	36
PID 3024 wrote to memory of 484	3024	RDo.exe	36
PID 3024 wrote to memory of 484	3024	RDo.exe	36
PID 3024 wrote to memory of 2668	3024	RDo.exe	38
PID 3024 wrote to memory of 2668	3024	RDo.exe	38
PID 3024 wrote to memory of 2668	3024	RDo.exe	38
PID 3024 wrote to memory of 2668	3024	RDo.exe	38
PID 2668 wrote to memory of 1796	2668	cmd.exe	41
PID 2668 wrote to memory of 1796	2668	cmd.exe	41
PID 2668 wrote to memory of 1796	2668	cmd.exe	41
PID 2668 wrote to memory of 1796	2668	cmd.exe	41
PID 484 wrote to memory of 2008	484	cmd.exe	40
PID 484 wrote to memory of 2008	484	cmd.exe	40
PID 484 wrote to memory of 2008	484	cmd.exe	40
PID 484 wrote to memory of 2008	484	cmd.exe	40
PID 2668 wrote to memory of 740	2668	cmd.exe	42
PID 2668 wrote to memory of 740	2668	cmd.exe	42
PID 2668 wrote to memory of 740	2668	cmd.exe	42
PID 2668 wrote to memory of 740	2668	cmd.exe	42
PID 2668 wrote to memory of 740	2668	cmd.exe	42
PID 2668 wrote to memory of 740	2668	cmd.exe	42
PID 2668 wrote to memory of 740	2668	cmd.exe	42

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Purchase_Order#29758-86548.js
1⤵
- Suspicious use of WriteProcessMemory
PID:3012
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\adobe.js"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2488
- - C:\Windows\System32\wscript.exe
    "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\adobe.js"
    3⤵
    - Blocklisted process makes network request
    - Drops startup file
    - Adds Run key to start application
    PID:2920
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\word.js"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2076
- - C:\Users\Admin\AppData\Local\Temp\RDo.exe
    "C:\Users\Admin\AppData\Local\Temp\RDo.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3024
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WindowsUpdate" /tr '"C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe"' & exit
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:484
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "WindowsUpdate" /tr '"C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe"'
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2008
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpACA4.tmp.bat""
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2668
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:1796
    - - C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe
        
        "C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
45KB

MD5
7e54eec2d10957178e6410ba1c899c21

SHA1
9f79b7ef7b24933b0b106a387fbf5834863dbc78

SHA256
d7d374d650d362b4a859f526189cda7ecdef9b0ee60267a1c65c3a9e1bcfd0f8

SHA512
e7cec2a67334c72e6476adb53bcb6de575f7c9513a49f0be7a7f6fb00b23ac070335b734631f024c411293cb09d0faa89bf7017837d65f5188884eabf853dd17

Download Submit
C:\Users\Admin\AppData\Local\Temp\adobe.js

Filesize
305KB

MD5
294f1f4ee9bd1a410379ccc7430c7a69

SHA1
02436fc31c5fa37c3735dcff0f450c20e302e7a2

SHA256
f0cc3f5f26302ba2cd290d11052a42b4adc5401b953439d49723b666ac100187

SHA512
8a87e29348ef3bd4c1847a65ef9ffabedba4f51504512819df396123d90e7bf8e1b3e7edb1e4e33419a8d309e47cbaa2f7c3a9f387f6d987cedc4e048d479abd

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpACA4.tmp.bat

Filesize
160B

MD5
492272121c499e293deefe4e72968eb1

SHA1
b7ad507d7fa1397deb719339a9b506e162705bd5

SHA256
b91100d7d2389b4cd16976d03fe646484996d05404ed3e349c91bd76b47b7c36

SHA512
f74f2c4494bea4ae3ff7a73a35b67bf5d849ae8ac74d88d1249fa726aab0c3c9bee41de00a697e8eaf4d7d436cbbe1026729ce445f18d001122ed6ec484fc8b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\word.js

Filesize
82KB

MD5
33d6e875441823e698ea8b8c4739dfd4

SHA1
a446695785e38522c923a5340e43c236ac332616

SHA256
32e6e9765b2e1e18699fdcc2817137b22f893457e2a10ae3f66081dd58f811ce

SHA512
633a462dba83497be30c969c1c637f144e1ff2bc741687326a53604bce93dd80af12acb49e546942978a2e629d6811b8612cd1362af5d41921ddae59b38977d2

Download Submit
memory/740-33-0x0000000001080000-0x0000000001092000-memory.dmp

Filesize
72KB

Download
memory/3024-20-0x00000000009F0000-0x0000000000A02000-memory.dmp

Filesize
72KB

Download