Analysis
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max time kernel
149s -
max time network
153s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
17-05-2023 15:29
Static task
static1
Behavioral task
behavioral1
Sample
old outstanding .PDF.js
Resource
win7-20230220-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
old outstanding .PDF.js
Resource
win10v2004-20230220-en
windows10-2004-x64
9 signatures
150 seconds
General
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Target
old outstanding .PDF.js
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Size
3.4MB
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MD5
f8ddd3aaf61755a6c98ec2c29972175c
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SHA1
1ddd1757ef6be65c231dc383369b84773544a6da
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SHA256
344b8c7c7c4467f18c9b43447efafad8ac795c25b006465aeb1bd6097b50abb7
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SHA512
a6ebf3d3ffa5c749f2ea2dc5eb90a7a355b8dcc1cf5b7b48cfdbc291b8f5f6df560ffcd59a6242583e64d0795ba034ad7aea2b68039b98b9b50259305e13e1c9
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SSDEEP
24576:zw3cOiE9u9QbpAW0MP074JExjtKTs7JRkWgGgbR4L3lN2bpxjkn1vrFWuYLasHfy:E0j
Score
10/10
Malware Config
Extracted
Family
wshrat
C2
http://84.21.172.33:8895
Signatures
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Blocklisted process makes network request 37 IoCs
flow pid Process 6 1168 wscript.exe 7 1748 wscript.exe 8 1748 wscript.exe 10 1168 wscript.exe 12 1748 wscript.exe 14 1168 wscript.exe 18 1748 wscript.exe 19 1168 wscript.exe 20 1748 wscript.exe 22 1168 wscript.exe 24 1748 wscript.exe 27 1748 wscript.exe 28 1168 wscript.exe 31 1748 wscript.exe 32 1168 wscript.exe 33 1748 wscript.exe 36 1748 wscript.exe 38 1168 wscript.exe 40 1748 wscript.exe 42 1748 wscript.exe 43 1168 wscript.exe 46 1748 wscript.exe 48 1168 wscript.exe 50 1748 wscript.exe 51 1168 wscript.exe 52 1748 wscript.exe 55 1168 wscript.exe 56 1748 wscript.exe 59 1748 wscript.exe 61 1168 wscript.exe 62 1748 wscript.exe 65 1168 wscript.exe 66 1748 wscript.exe 68 1748 wscript.exe 70 1168 wscript.exe 73 1748 wscript.exe 75 1168 wscript.exe -
Drops startup file 4 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JbhvVxjFLu.js wscript.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\old outstanding .PDF.js wscript.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\old outstanding .PDF.js wscript.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JbhvVxjFLu.js wscript.exe -
Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\software\microsoft\windows\currentversion\run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run\old outstanding = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\old outstanding .PDF.js\"" wscript.exe Key created \REGISTRY\MACHINE\software\microsoft\windows\currentversion\run wscript.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\old outstanding = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\old outstanding .PDF.js\"" wscript.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Script User-Agent 21 IoCs
Uses user-agent string associated with script host/environment.
description flow ioc HTTP User-Agent header 24 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 27 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 40 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 46 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 7 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 8 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 33 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 36 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 59 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 73 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 18 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 42 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 52 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 62 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 68 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 12 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 20 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 31 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 50 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 56 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 66 WSHRAT|F4C6D0E0|WFSTZEPN|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 17/5/2023|JavaScript -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1748 wrote to memory of 1168 1748 wscript.exe 28 PID 1748 wrote to memory of 1168 1748 wscript.exe 28 PID 1748 wrote to memory of 1168 1748 wscript.exe 28
Processes
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C:\Windows\system32\wscript.exewscript.exe "C:\Users\Admin\AppData\Local\Temp\old outstanding .PDF.js"1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1748 -
C:\Windows\System32\wscript.exe"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\JbhvVxjFLu.js"2⤵
- Blocklisted process makes network request
- Drops startup file
PID:1168
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
346KB
MD5094b69598513ca6dad4609a1a622c665
SHA144fbd36b3c2eec31e3424d7ec5d93d50721e7d13
SHA256f50dc6f0205c3d62f02ef2df694a1bb468b110efc83b38236747d1b40c3cbc33
SHA512558b6ae3466c0ca2eee60665acb41f3ab9deacd7898cfd2404ed726f47990d188ba3eec429cba91aeed9d87a4b37d17be78801009ecb42d4c8dadd2f017fed67
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\old outstanding .PDF.js
Filesize3.4MB
MD5f8ddd3aaf61755a6c98ec2c29972175c
SHA11ddd1757ef6be65c231dc383369b84773544a6da
SHA256344b8c7c7c4467f18c9b43447efafad8ac795c25b006465aeb1bd6097b50abb7
SHA512a6ebf3d3ffa5c749f2ea2dc5eb90a7a355b8dcc1cf5b7b48cfdbc291b8f5f6df560ffcd59a6242583e64d0795ba034ad7aea2b68039b98b9b50259305e13e1c9