4e0ddcd303f27c01dcc8a35a9bd821c53fb7dcca474ac7f0c84d3c6451e9f778

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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
1175s
max time network
1196s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
14-04-2024 10:31

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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 47 IoCs

flow	pid	Process
10	4904	wscript.exe
11	4904	wscript.exe
19	4904	wscript.exe
32	4904	wscript.exe
40	4904	wscript.exe
45	4904	wscript.exe
46	4904	wscript.exe
49	4904	wscript.exe
50	4904	wscript.exe
52	4904	wscript.exe
53	4904	wscript.exe
54	4904	wscript.exe
55	4904	wscript.exe
56	4904	wscript.exe
57	4904	wscript.exe
58	4904	wscript.exe
59	4904	wscript.exe
60	4904	wscript.exe
62	4904	wscript.exe
64	4904	wscript.exe
65	4904	wscript.exe
66	4904	wscript.exe
67	4904	wscript.exe
68	4904	wscript.exe
69	4904	wscript.exe
70	4904	wscript.exe
71	4904	wscript.exe
72	4904	wscript.exe
73	4904	wscript.exe
74	4904	wscript.exe
75	4904	wscript.exe
76	4904	wscript.exe
77	4904	wscript.exe
78	4904	wscript.exe
79	4904	wscript.exe
80	4904	wscript.exe
81	4904	wscript.exe
82	4904	wscript.exe
83	4904	wscript.exe
84	4904	wscript.exe
85	4904	wscript.exe
86	4904	wscript.exe
87	4904	wscript.exe
88	4904	wscript.exe
89	4904	wscript.exe
90	4904	wscript.exe
91	4904	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Antimalware Service Executable.js	wscript.exe
File opened for modification	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-1-5-21-4041115548-3858121278-1660933110-1000\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-1-5-21-4041115548-3858121278-1660933110-1000\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 1220 wrote to memory of 4904	1220	wscript.exe	81
PID 1220 wrote to memory of 4904	1220	wscript.exe	81

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:1220
- 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:4904

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