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09-04-2024 13:34

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09-04-2024 13:34

09-04-2024 13:33

09-04-2024 13:33

07-07-2023 11:45

Analysis

max time kernel
1799s
max time network
1801s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
09-04-2024 13:34

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General

Target

Antimalware Service Executable.js
Size

713KB
MD5

c958a31d5e439d5b0d01900e5a85992a
SHA1

fc40d0ef637fe55fbaf83e8f4891e008ac736df6
SHA256

e3a33757c2e596f7ee50a4a41ff58f2e64dbdb062257fe5749ca19b955b0baaf
SHA512

2aa0c813b7c17b01e1c18a3a12fb4f3c8ba9c9fee79a3ed66421959fd0440571e0cba5e90569970655342ce2730e823feae23ef6c5da09248f3da68fc0f3cf1c
SSDEEP

12288:KOmMdaDXBuOdAAxcHaMp7yk0AaDhlLBO0Xzaj1B+UquKbLZaQlx+2CRQlD+EhajH:KOmMdaDXBuOdAAxcHaMp7yk0AaDhlLBc

Score

8^/10

persistence

Malware Config

Signatures

Blocklisted process makes network request 64 IoCs

flow	pid	Process
2	2016	wscript.exe
3	2016	wscript.exe
5	2016	wscript.exe
7	2016	wscript.exe
8	2016	wscript.exe
10	2016	wscript.exe
11	2016	wscript.exe
12	2016	wscript.exe
13	2016	wscript.exe
14	2016	wscript.exe
15	2016	wscript.exe
16	2016	wscript.exe
17	2016	wscript.exe
18	2016	wscript.exe
23	2016	wscript.exe
24	2016	wscript.exe
25	2016	wscript.exe
27	2016	wscript.exe
28	2016	wscript.exe
30	2016	wscript.exe
31	2016	wscript.exe
32	2016	wscript.exe
33	2016	wscript.exe
34	2016	wscript.exe
35	2016	wscript.exe
36	2016	wscript.exe
37	2016	wscript.exe
38	2016	wscript.exe
39	2016	wscript.exe
40	2016	wscript.exe
41	2016	wscript.exe
42	2016	wscript.exe
43	2016	wscript.exe
44	2016	wscript.exe
45	2016	wscript.exe
46	2016	wscript.exe
47	2016	wscript.exe
48	2016	wscript.exe
49	2016	wscript.exe
50	2016	wscript.exe
51	2016	wscript.exe
52	2016	wscript.exe
53	2016	wscript.exe
54	2016	wscript.exe
55	2016	wscript.exe
56	2016	wscript.exe
57	2016	wscript.exe
58	2016	wscript.exe
59	2016	wscript.exe
60	2016	wscript.exe
61	2016	wscript.exe
62	2016	wscript.exe
63	2016	wscript.exe
64	2016	wscript.exe
65	2016	wscript.exe
66	2016	wscript.exe
67	2016	wscript.exe
68	2016	wscript.exe
69	2016	wscript.exe
70	2016	wscript.exe
71	2016	wscript.exe
72	2016	wscript.exe
73	2016	wscript.exe
74	2016	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Antimalware Service Executable.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Antimalware Service Executable.js	wscript.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-1-5-21-1637591879-962683004-3585269084-1000\Software\Microsoft\Windows\CurrentVersion\Run\Antimalware Service Executable = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Antimalware Service Executable.js\""	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Antimalware Service Executable = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Antimalware Service Executable.js\""	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1637591879-962683004-3585269084-1000\Software\Microsoft\Windows\CurrentVersion\Run\Antimalware Service Executable = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Antimalware Service Executable.js\""	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Antimalware Service Executable = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Antimalware Service Executable.js\""	wscript.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	ip-api.com

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4908 wrote to memory of 2016	4908	wscript.exe	77
PID 4908 wrote to memory of 2016	4908	wscript.exe	77

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\Antimalware Service Executable.js"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4908
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\Antimalware Service Executable.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:2016

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Antimalware Service Executable.js

Filesize
713KB

MD5
c958a31d5e439d5b0d01900e5a85992a

SHA1
fc40d0ef637fe55fbaf83e8f4891e008ac736df6

SHA256
e3a33757c2e596f7ee50a4a41ff58f2e64dbdb062257fe5749ca19b955b0baaf

SHA512
2aa0c813b7c17b01e1c18a3a12fb4f3c8ba9c9fee79a3ed66421959fd0440571e0cba5e90569970655342ce2730e823feae23ef6c5da09248f3da68fc0f3cf1c

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Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads