Analysis
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max time kernel
151s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
20-10-2022 22:51
Static task
static1
Behavioral task
behavioral1
Sample
55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe
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Size
140KB
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MD5
5896d7a1c209c8ef3ecf50f1c6c4fc30
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SHA1
bebccc08def9fe98c5c728ecac3909b340a1177f
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SHA256
55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6
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SHA512
24e922aa8ea208c080bff35e64f8c2c07404c7edd47d5022c819d0d4d87adc4482eb02c70590b0a7f8d4c2c1e9b644e75a777d8cac6d76f36a303977c039389f
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SSDEEP
3072:pbPev7777777777777777jk77777777777777777774npPnYyQ1cM63Om:pOPnYHg33
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" 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" kokub.exe -
Executes dropped EXE 1 IoCs
pid Process 408 kokub.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 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe -
Adds Run key to start application 2 TTPs 20 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /x" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /g" 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /b" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /o" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /k" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /y" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /p" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /i" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /e" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /s" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /c" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /m" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /q" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /g" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /n" kokub.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /f" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /v" kokub.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kokub = "C:\\Users\\Admin\\kokub.exe /r" kokub.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 1332 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe 1332 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe 408 kokub.exe -
Suspicious use of SetWindowsHookEx 4 IoCs
pid Process 1332 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe 1332 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe 408 kokub.exe 408 kokub.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1332 wrote to memory of 408 1332 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe 89 PID 1332 wrote to memory of 408 1332 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe 89 PID 1332 wrote to memory of 408 1332 55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.exe"C:\Users\Admin\AppData\Local\Temp\55d71e132fcf369e6195359fbc408913523721328b8b166351a03f3e2aa8f4b6.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:1332 -
C:\Users\Admin\kokub.exe"C:\Users\Admin\kokub.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:408
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
140KB
MD54e1f09bd54e5a5e31e190ec644202f78
SHA1eccbd30e8a80de91e1034da9c15c043a27b41f5e
SHA2562e46281dff8f1dbe3fc3a80b4baf1ba69d29dd639db88ffbd2682e51be4b87c4
SHA512d303c35c58035f7264706ccf785bcad805db1851ea0b64fe1d9082e27c68395c8f181f7b63d3b88f46349f4a2678fa8976cc52b5b8cb1abc053f31894674baed
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Filesize
140KB
MD54e1f09bd54e5a5e31e190ec644202f78
SHA1eccbd30e8a80de91e1034da9c15c043a27b41f5e
SHA2562e46281dff8f1dbe3fc3a80b4baf1ba69d29dd639db88ffbd2682e51be4b87c4
SHA512d303c35c58035f7264706ccf785bcad805db1851ea0b64fe1d9082e27c68395c8f181f7b63d3b88f46349f4a2678fa8976cc52b5b8cb1abc053f31894674baed