Analysis
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max time kernel
147s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-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 43 IoCs
flow pid Process 6 1640 wscript.exe 7 1920 wscript.exe 10 1640 wscript.exe 19 1920 wscript.exe 20 1640 wscript.exe 22 1640 wscript.exe 23 1920 wscript.exe 25 1640 wscript.exe 28 1920 wscript.exe 31 1640 wscript.exe 44 1640 wscript.exe 49 1920 wscript.exe 51 1640 wscript.exe 63 1640 wscript.exe 65 1920 wscript.exe 70 1640 wscript.exe 75 1640 wscript.exe 76 1920 wscript.exe 77 1640 wscript.exe 78 1640 wscript.exe 80 1920 wscript.exe 82 1640 wscript.exe 84 1920 wscript.exe 85 1640 wscript.exe 86 1640 wscript.exe 87 1920 wscript.exe 90 1640 wscript.exe 91 1920 wscript.exe 92 1640 wscript.exe 93 1640 wscript.exe 94 1920 wscript.exe 95 1640 wscript.exe 98 1640 wscript.exe 99 1920 wscript.exe 100 1640 wscript.exe 101 1640 wscript.exe 102 1920 wscript.exe 103 1640 wscript.exe 106 1640 wscript.exe 107 1920 wscript.exe 108 1640 wscript.exe 109 1640 wscript.exe 110 1920 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-1-5-21-2275444769-3691835758-4097679484-1000\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\JbhvVxjFLu.js wscript.exe 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 -
Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\software\microsoft\windows\currentversion\run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\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 27 IoCs
Uses user-agent string associated with script host/environment.
description flow ioc HTTP User-Agent header 100 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 108 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 98 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 101 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 25 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 51 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 86 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 10 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 44 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 78 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 85 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 93 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 20 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 63 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 92 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 103 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 106 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 22 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 70 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 77 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 82 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 90 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 31 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 95 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 6 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 75 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript HTTP User-Agent header 109 WSHRAT|924C16C7|OZADSVWH|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 17/5/2023|JavaScript -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 1640 wrote to memory of 1920 1640 wscript.exe 83 PID 1640 wrote to memory of 1920 1640 wscript.exe 83
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:1640 -
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:1920
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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