4e0ddcd303f27c01dcc8a35a9bd821c53fb7dcca474ac7f0c84d3c6451e9f778

Analysis

max time kernel
1797s
max time network
1799s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-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	4396	wscript.exe
4	4396	wscript.exe
9	4396	wscript.exe
11	4396	wscript.exe
15	4396	wscript.exe
16	4396	wscript.exe
18	4396	wscript.exe
24	4396	wscript.exe
26	4396	wscript.exe
30	4396	wscript.exe
31	4396	wscript.exe
33	4396	wscript.exe
34	4396	wscript.exe
35	4396	wscript.exe
41	4396	wscript.exe
42	4396	wscript.exe
43	4396	wscript.exe
44	4396	wscript.exe
45	4396	wscript.exe
46	4396	wscript.exe
47	4396	wscript.exe
48	4396	wscript.exe
49	4396	wscript.exe
50	4396	wscript.exe
51	4396	wscript.exe
52	4396	wscript.exe
53	4396	wscript.exe
54	4396	wscript.exe
55	4396	wscript.exe
56	4396	wscript.exe
57	4396	wscript.exe
58	4396	wscript.exe
59	4396	wscript.exe
60	4396	wscript.exe
61	4396	wscript.exe
62	4396	wscript.exe
63	4396	wscript.exe
64	4396	wscript.exe
65	4396	wscript.exe
66	4396	wscript.exe
67	4396	wscript.exe
68	4396	wscript.exe
69	4396	wscript.exe
70	4396	wscript.exe
71	4396	wscript.exe
72	4396	wscript.exe
73	4396	wscript.exe
74	4396	wscript.exe
75	4396	wscript.exe
76	4396	wscript.exe
77	4396	wscript.exe
78	4396	wscript.exe
79	4396	wscript.exe
80	4396	wscript.exe
81	4396	wscript.exe
82	4396	wscript.exe
83	4396	wscript.exe
84	4396	wscript.exe
85	4396	wscript.exe
86	4396	wscript.exe
87	4396	wscript.exe
88	4396	wscript.exe
89	4396	wscript.exe
90	4396	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-1-5-21-1687926120-3022217735-1146543763-1000\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-1-5-21-1687926120-3022217735-1146543763-1000\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 4604 wrote to memory of 4396	4604	wscript.exe	73
PID 4604 wrote to memory of 4396	4604	wscript.exe	73

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:4604
- 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:4396

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