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Analysis
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max time kernel
153s -
max time network
209s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
01/12/2022, 22:36
Static task
static1
Behavioral task
behavioral1
Sample
cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe
Resource
win7-20221111-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe
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Size
448KB
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MD5
47c0b97a2e21858719aeec61f588aa80
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SHA1
c5f6cca0d4a7423541d7831a0b27cb319e520a83
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SHA256
cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54
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SHA512
b9cdaec20fb61676ca69f4ef7123169bf3a99b1cc4f1c1e078f0e90818570e0c18ff4dc54f75220c03210d1ca5d35736b62f748ee8dc2b9c07073e85d8136079
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SSDEEP
6144:AV9op2pYjjqFk7qFoQudlhixeWrS4ijMI7cGwFGM:Anop2pYE2QudA4gzDF9
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-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" gcsaof.exe Set value (int) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe -
Executes dropped EXE 1 IoCs
pid Process 3224 gcsaof.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /n" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /a" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /z" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /r" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /h" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /m" gcsaof.exe Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Windows\CurrentVersion\Run\ cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Windows\CurrentVersion\Run\ gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /w" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /q" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /t" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /b" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /u" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /s" cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /k" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /v" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /j" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /i" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /e" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /o" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /g" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /c" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /s" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /y" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /x" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /l" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /f" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /p" gcsaof.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gcsaof = "C:\\Users\\Admin\\gcsaof.exe /d" gcsaof.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 3972 cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe 3972 cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe 3224 gcsaof.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 3972 cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe 3224 gcsaof.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3972 wrote to memory of 3224 3972 cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe 83 PID 3972 wrote to memory of 3224 3972 cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe 83 PID 3972 wrote to memory of 3224 3972 cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.exe"C:\Users\Admin\AppData\Local\Temp\cf462320981149a6b5d65d00b2c0cf4b0e43e6cb6a2240e7ef3db80900709a54.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:3972 -
C:\Users\Admin\gcsaof.exe"C:\Users\Admin\gcsaof.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:3224
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
448KB
MD57c7f89c0a311723ebcdc32aceac9c171
SHA1341d66854eecec92836e1296f2dddd1445659335
SHA256ac26d10404b0cb8df5b25dd028914ada85ebaded62c5872c7502f2489935c049
SHA512b2299afe6903e350bc1f3ac5ab12eec23690da444a0f0c45363442094ecf89317e0cc9e2c3cf1803b259c57a6ee5ca7af016589b57926c1ccbe3199e97b072a3
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Filesize
448KB
MD57c7f89c0a311723ebcdc32aceac9c171
SHA1341d66854eecec92836e1296f2dddd1445659335
SHA256ac26d10404b0cb8df5b25dd028914ada85ebaded62c5872c7502f2489935c049
SHA512b2299afe6903e350bc1f3ac5ab12eec23690da444a0f0c45363442094ecf89317e0cc9e2c3cf1803b259c57a6ee5ca7af016589b57926c1ccbe3199e97b072a3