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Analysis
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max time kernel
156s -
max time network
160s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
02/12/2022, 00:42
Static task
static1
Behavioral task
behavioral1
Sample
79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe
Resource
win7-20221111-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe
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Size
200KB
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MD5
7f24fc84d3d286df36917ef2d4d4c2cb
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SHA1
2e06c8657d736e4336603690176e5126fd79e1d6
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SHA256
79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c
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SHA512
bd5d3865cd48fb4f10eaae3bca6626ca2332488700fee29b70ca76dff0da23cda023ddcd542cb6c990d0f6861a4c5aacd63e2d8007bfc49146f226d99a5d6231
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SSDEEP
3072:jC2To/0Yxd0tQ9nLHbB9WPliBs2HWWEakGJm9rn:jCvP4QxL7B9WPli+yWWEazg
Score
10/10
Malware Config
Signatures
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Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" 79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe Set value (int) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" buesav.exe -
Executes dropped EXE 1 IoCs
pid Process 5056 buesav.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation 79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /w" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /n" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /u" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /m" buesav.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /q" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /o" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /l" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /i" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /s" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /f" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /y" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /t" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /f" 79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /p" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /h" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /k" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /b" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /e" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /d" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /g" buesav.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\ buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /x" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /z" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /r" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /a" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /v" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /c" buesav.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\buesav = "C:\\Users\\Admin\\buesav.exe /j" buesav.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1572 79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe 1572 79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe 5056 buesav.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1572 79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe 5056 buesav.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1572 wrote to memory of 5056 1572 79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe 80 PID 1572 wrote to memory of 5056 1572 79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe 80 PID 1572 wrote to memory of 5056 1572 79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe 80
Processes
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C:\Users\Admin\AppData\Local\Temp\79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe"C:\Users\Admin\AppData\Local\Temp\79d8e93744e6fa421b1d0c64b56d83619b30d15be1dd5b29b69e6571e5c19a2c.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1572 -
C:\Users\Admin\buesav.exe"C:\Users\Admin\buesav.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:5056
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
200KB
MD527b85435c4d05e8e22402146be898a15
SHA1b286c281ba2bf37f87144b6465a57dadc2f45bda
SHA2563ffe94de16e7e601bb09173e5c0664753a25545a864d0603bb15cff760525bdf
SHA512f74c71ee07e5db76e6eb373cc71deab13a22feddb6d99e38a11f6af6ea1256dfc0ddf6391ac765906b2d77f1fc22d0294eaec20ce01ddeeb189ee685ec44adb5
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Filesize
200KB
MD527b85435c4d05e8e22402146be898a15
SHA1b286c281ba2bf37f87144b6465a57dadc2f45bda
SHA2563ffe94de16e7e601bb09173e5c0664753a25545a864d0603bb15cff760525bdf
SHA512f74c71ee07e5db76e6eb373cc71deab13a22feddb6d99e38a11f6af6ea1256dfc0ddf6391ac765906b2d77f1fc22d0294eaec20ce01ddeeb189ee685ec44adb5