Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
19-05-2023 01:50
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 41 IoCs
flow pid Process 29 4936 wscript.exe 30 4748 wscript.exe 31 4748 wscript.exe 34 4748 wscript.exe 50 4936 wscript.exe 53 4748 wscript.exe 55 4936 wscript.exe 62 4748 wscript.exe 63 4936 wscript.exe 66 4936 wscript.exe 69 4748 wscript.exe 70 4936 wscript.exe 74 4936 wscript.exe 76 4748 wscript.exe 80 4936 wscript.exe 81 4936 wscript.exe 82 4748 wscript.exe 83 4936 wscript.exe 84 4936 wscript.exe 85 4748 wscript.exe 91 4936 wscript.exe 92 4748 wscript.exe 93 4936 wscript.exe 94 4936 wscript.exe 95 4748 wscript.exe 96 4936 wscript.exe 97 4936 wscript.exe 98 4748 wscript.exe 99 4936 wscript.exe 100 4936 wscript.exe 101 4748 wscript.exe 102 4936 wscript.exe 103 4936 wscript.exe 104 4748 wscript.exe 105 4936 wscript.exe 106 4936 wscript.exe 107 4748 wscript.exe 108 4936 wscript.exe 109 4748 wscript.exe 110 4936 wscript.exe 111 4936 wscript.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation wscript.exe -
Drops startup file 4 IoCs
description ioc Process 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 File opened for modification 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-1-5-21-1013461898-3711306144-4198452673-1000\software\microsoft\windows\currentversion\run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\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 24 IoCs
Uses user-agent string associated with script host/environment.
description flow ioc HTTP User-Agent header 111 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 63 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 83 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 99 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 105 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 110 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 97 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 102 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 108 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 50 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 55 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 80 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 81 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 91 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 106 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 70 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 74 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 84 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 93 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 94 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 66 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 96 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 100 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript HTTP User-Agent header 103 WSHRAT|78F0674A|HCIDPJOT|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 19/5/2023|JavaScript -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 4936 wrote to memory of 4748 4936 wscript.exe 85 PID 4936 wrote to memory of 4748 4936 wscript.exe 85
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
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4936 -
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:4748
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
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