Analysis
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max time kernel
145s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
23/02/2024, 12:27
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe
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Size
37KB
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MD5
1bd5cb923fea1755e53d319b1c49d7be
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SHA1
2017db7519b57033a6ba6e7844c49a0e4853be30
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SHA256
fcb5bc70a3b13a8135442a155b8f999581767d84b8cf3557dc6bab6306185ca7
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SHA512
73b14076475b306e4134231f603c53fe32b93490055dc9e122c05041089e1aee85b17652cc1e9d2a41d879894be1dccf575f13a58d53556368bc2ea7512b6484
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuVuAn:b/yC4GyNM01GuQMNXw2PSjHPbSuF
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0008000000023204-12.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 2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 456 retln.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 3288 wrote to memory of 456 3288 2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe 89 PID 3288 wrote to memory of 456 3288 2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe 89 PID 3288 wrote to memory of 456 3288 2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-23_1bd5cb923fea1755e53d319b1c49d7be_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3288 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:456
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
37KB
MD57d40a10a9bb27fd90e190868a844a024
SHA123d24b050f577c6e3e0eced626c43e7dcbd9a4b3
SHA2565837ded4dfaef4379e46713d72516953a87b2a49adc2e51ecc710066eb494c64
SHA512ebb36f7a13068c188d25019098d5f9f94b83a2f95f4ed548cc243eee578c2fa99054ce30f673cb2fdbd3f06cdd4020b746e4479c8cf3ffed30ccf6886e2121ec