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Analysis
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max time kernel
148s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
15/04/2024, 14:47
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-15_7c6735673817ab8a73ee416db7f6a0b3_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-15_7c6735673817ab8a73ee416db7f6a0b3_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-15_7c6735673817ab8a73ee416db7f6a0b3_cryptolocker.exe
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Size
35KB
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MD5
7c6735673817ab8a73ee416db7f6a0b3
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SHA1
76d5129607f3afc2c66988a2f813f57fc7fbed01
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SHA256
54b0a20d96b9248f1c8f3166dde79fa8b53f6d5b281120240965b2cdd7cda0c6
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SHA512
2683837cca655c508455fe6131367a31bcd50e0d3655035121592ddbe578557a89f8d91cb7d185ad3c7c37a13db399eaa076615ffeae138249c29c390446648e
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SSDEEP
384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4XDIwNiA0f9HMowJ:btB9g/WItCSsAGjX7e9N8sp
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000900000002323e-12.dat CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-4092317236-2027488869-1227795436-1000\Control Panel\International\Geo\Nation 2024-04-15_7c6735673817ab8a73ee416db7f6a0b3_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-4092317236-2027488869-1227795436-1000\Control Panel\International\Geo\Nation gewos.exe -
Executes dropped EXE 1 IoCs
pid Process 4176 gewos.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2496 wrote to memory of 4176 2496 2024-04-15_7c6735673817ab8a73ee416db7f6a0b3_cryptolocker.exe 82 PID 2496 wrote to memory of 4176 2496 2024-04-15_7c6735673817ab8a73ee416db7f6a0b3_cryptolocker.exe 82 PID 2496 wrote to memory of 4176 2496 2024-04-15_7c6735673817ab8a73ee416db7f6a0b3_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-15_7c6735673817ab8a73ee416db7f6a0b3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-15_7c6735673817ab8a73ee416db7f6a0b3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2496 -
C:\Users\Admin\AppData\Local\Temp\gewos.exe"C:\Users\Admin\AppData\Local\Temp\gewos.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:4176
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
35KB
MD5ee49354706b23e1383698ca56d25d08f
SHA108f1a0b5a4030bd27e4c12b8b8bc475ed02c0637
SHA256e6e23ecf7d312cc8172fd2201f0dfc59c29030c0cf3d3bde44ddabdb2bf95d9b
SHA51299fa283bdc80b3f927e86543908ab47e793a5bf44adc7062f82b56e4ceb7aba8101fe1f40bc82cd3937f04495bf766448bc81144754dccb49c78cfc10fea8278