Analysis
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max time kernel
151s -
max time network
139s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
01/12/2022, 22:42
Static task
static1
Behavioral task
behavioral1
Sample
c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe
Resource
win7-20221111-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe
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Size
240KB
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MD5
7a9f12243c7876f39a152ad4d648d8ec
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SHA1
2f5c7a1a3a2d9ac72da1a6da314275112a2aa23f
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SHA256
c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9
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SHA512
75eff4c4862231b1eb10c1d0b4d3bfb8e34e16469676e2010184f2bf0155ce7e034f62597de7d2c0d6ae04484ae19fccc5cc7d706085b463126930fbcc5a6325
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SSDEEP
6144:9a3dwqsNTNEXGlQR58EqxF6snji81RUinKq3aEESliDSi:9odQKjeaEEpz
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-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" cohek.exe -
Executes dropped EXE 1 IoCs
pid Process 456 cohek.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /s" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /d" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /w" c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /l" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /m" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /e" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /q" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /y" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /v" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /o" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /x" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /z" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /i" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /f" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /j" cohek.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /a" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /p" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /t" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /h" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /n" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /g" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /w" cohek.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /c" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /b" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /r" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /u" cohek.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cohek = "C:\\Users\\Admin\\cohek.exe /k" cohek.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 4884 c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe 4884 c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe 456 cohek.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 4884 c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe 456 cohek.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4884 wrote to memory of 456 4884 c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe 81 PID 4884 wrote to memory of 456 4884 c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe 81 PID 4884 wrote to memory of 456 4884 c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.exe"C:\Users\Admin\AppData\Local\Temp\c4b1b6f678175ba37e0e6c46cafe85a9283ce1c2984313dc0a1dd50eb1accdb9.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:4884 -
C:\Users\Admin\cohek.exe"C:\Users\Admin\cohek.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:456
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
240KB
MD5855a80c5d2cb3f3be04f65d5afa8ad19
SHA1d333f5d7220e73c82a4d48264a05b600cdec013b
SHA256db331da93e2799c72a421aaabfa6dfc761825e65efae558a5c9b33f9450aa52f
SHA51292a154632e931fc734099976045b497d35db27d562614f2395f76596fced0bcbbbe28dd7bc1efeccade24899c5e1c295f1e975188b1d0c17838251044eae3779
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Filesize
240KB
MD5855a80c5d2cb3f3be04f65d5afa8ad19
SHA1d333f5d7220e73c82a4d48264a05b600cdec013b
SHA256db331da93e2799c72a421aaabfa6dfc761825e65efae558a5c9b33f9450aa52f
SHA51292a154632e931fc734099976045b497d35db27d562614f2395f76596fced0bcbbbe28dd7bc1efeccade24899c5e1c295f1e975188b1d0c17838251044eae3779