4e0ddcd303f27c01dcc8a35a9bd821c53fb7dcca474ac7f0c84d3c6451e9f778

Analysis

max time kernel
1799s
max time network
1801s
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
Sample240414-mkd3fafh76
SHA256 e3a33757c2e596f7ee50a4a41ff58f2e64dbdb062257fe5749ca19b955b0baaf
MD5 c958a31d5e439d5b0d01900e5a85992a
SHA1 fc40d0ef637fe55fbaf83e8f4891e008ac736df6
SHA512 2aa0c813b7c17b01e1c18a3a12fb4f3c8ba9c9fee79a3ed66421959fd0440571e0cba5e90569970655342ce2730e823feae23ef6c5da09248f3da68fc0f3cf1c
SSDEEP 12288:KOmMdaDXBuOdAAxcHaMp7yk0AaDhlLBO0Xzaj1B+UquKbLZaQlx+2CRQlD+EhajH:KOmMdaDXBuOdAAxcHaMp7yk0AaDhlLBc
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

persistence

Malware Config

Signatures

Blocklisted process makes network request 64 IoCs

flow	pid	Process
2	860	wscript.exe
3	860	wscript.exe
5	860	wscript.exe
7	860	wscript.exe
8	860	wscript.exe
10	860	wscript.exe
11	860	wscript.exe
12	860	wscript.exe
13	860	wscript.exe
14	860	wscript.exe
15	860	wscript.exe
16	860	wscript.exe
17	860	wscript.exe
18	860	wscript.exe
22	860	wscript.exe
23	860	wscript.exe
24	860	wscript.exe
26	860	wscript.exe
27	860	wscript.exe
29	860	wscript.exe
30	860	wscript.exe
31	860	wscript.exe
32	860	wscript.exe
33	860	wscript.exe
34	860	wscript.exe
35	860	wscript.exe
36	860	wscript.exe
37	860	wscript.exe
38	860	wscript.exe
39	860	wscript.exe
40	860	wscript.exe
41	860	wscript.exe
42	860	wscript.exe
43	860	wscript.exe
44	860	wscript.exe
45	860	wscript.exe
46	860	wscript.exe
47	860	wscript.exe
48	860	wscript.exe
49	860	wscript.exe
50	860	wscript.exe
51	860	wscript.exe
52	860	wscript.exe
53	860	wscript.exe
54	860	wscript.exe
55	860	wscript.exe
56	860	wscript.exe
57	860	wscript.exe
58	860	wscript.exe
59	860	wscript.exe
60	860	wscript.exe
61	860	wscript.exe
62	860	wscript.exe
63	860	wscript.exe
64	860	wscript.exe
79	860	wscript.exe
85	860	wscript.exe
90	860	wscript.exe
91	860	wscript.exe
93	860	wscript.exe
94	860	wscript.exe
95	860	wscript.exe
96	860	wscript.exe
97	860	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-1-5-21-801878912-692986033-442676226-1000\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-1-5-21-801878912-692986033-442676226-1000\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 5044 wrote to memory of 860	5044	wscript.exe	76
PID 5044 wrote to memory of 860	5044	wscript.exe	76

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:5044
- 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:860

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

Antimalware Service Executable.js

Path C:\Users\Admin\AppData\Roaming\Antimalware Service Executable.js
Size 713KB
SHA256 e3a33757c2e596f7ee50a4a41ff58f2e64dbdb062257fe5749ca19b955b0baaf
MD5 c958a31d5e439d5b0d01900e5a85992a
SHA1 fc40d0ef637fe55fbaf83e8f4891e008ac736df6
SHA512 2aa0c813b7c17b01e1c18a3a12fb4f3c8ba9c9fee79a3ed66421959fd0440571e0cba5e90569970655342ce2730e823feae23ef6c5da09248f3da68fc0f3cf1c
SSDEEP 12288:KOmMdaDXBuOdAAxcHaMp7yk0AaDhlLBO0Xzaj1B+UquKbLZaQlx+2CRQlD+EhajH:KOmMdaDXBuOdAAxcHaMp7yk0AaDhlLBc
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads