Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
25/02/2024, 13:44
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-25_c5d06455cc1b129d310cf05246f6d6d5_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-25_c5d06455cc1b129d310cf05246f6d6d5_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-25_c5d06455cc1b129d310cf05246f6d6d5_cryptolocker.exe
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Size
41KB
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MD5
c5d06455cc1b129d310cf05246f6d6d5
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SHA1
56d72f6c67f842cc01f68385678b755d1411e4d4
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SHA256
6aa33d47b1f86f4c4f54e4ce219a368f57d4356e4417bdd90734ab8bdf2ed437
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SHA512
cfa64c11c405d6ea0d05853d343b72351b7a577b8e90ceadc546df111ed792bb61e6d54ddd32b386085bb13e4a8f83353b760ecc31b261a73dd2a05e6e900a42
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SSDEEP
768:bIDOw9UiaCHfjnE0Sf88AvvP1oghYvm9/6Dy8POKXuy:bIDOw9a0Dwo3P1ojvUSDh1L
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000300000001fc40-12.dat CryptoLocker_rule2 -
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-1-5-21-3316742141-2240921845-2885234760-1000\Control Panel\International\Geo\Nation 2024-02-25_c5d06455cc1b129d310cf05246f6d6d5_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3564 lossy.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 3300 wrote to memory of 3564 3300 2024-02-25_c5d06455cc1b129d310cf05246f6d6d5_cryptolocker.exe 88 PID 3300 wrote to memory of 3564 3300 2024-02-25_c5d06455cc1b129d310cf05246f6d6d5_cryptolocker.exe 88 PID 3300 wrote to memory of 3564 3300 2024-02-25_c5d06455cc1b129d310cf05246f6d6d5_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-25_c5d06455cc1b129d310cf05246f6d6d5_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-25_c5d06455cc1b129d310cf05246f6d6d5_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3300 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:3564
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD5e8c0657105af6624ea09579a56362692
SHA1c8be270e859ab5b90ef0f2cfbda34930821b7576
SHA2565b28727880d8f22472e48f927920e896612b824f4dbbe44ad9dbb4337a693d3d
SHA512f7a8f209772bd408a06f12b4adc1baac3a798f0d67e2c19b2ea18196fbe7e723eb233155ea861b5f028617a0f69ef5c311895caafb98a42bc843277ce9619f0c