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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
18/02/2024, 11:38
Behavioral task
behavioral1
Sample
2024-02-18_51d072cca623f565d92a38598c641483_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-02-18_51d072cca623f565d92a38598c641483_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-18_51d072cca623f565d92a38598c641483_cryptolocker.exe
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Size
64KB
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MD5
51d072cca623f565d92a38598c641483
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SHA1
ba80a793ac3f72b1b8ccd4e9958ec5ed372eba92
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SHA256
33f28e1583ce6142dc26f5c5494edfabd6accf01c787f975617a02233e3364b6
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SHA512
0e17cbf2a76bf9f1f4a9cec514fd1f18de333e4ef90ce13eccde0c3d173bfe9bcb3d34cb877fa7c5051141bd5b9e80cdb49a510b56e93f4970d7a766921563e4
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SSDEEP
768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5km:zj+soPSMOtEvwDpj4kpmeLmQm
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1460-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00070000000231fc-13.dat CryptoLocker_rule2 behavioral2/memory/1460-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1828-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/1460-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00070000000231fc-13.dat CryptoLocker_set1 behavioral2/memory/1460-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1828-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/1460-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00070000000231fc-13.dat UPX behavioral2/memory/1460-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1828-26-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation 2024-02-18_51d072cca623f565d92a38598c641483_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1828 misid.exe -
resource yara_rule behavioral2/memory/1460-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x00070000000231fc-13.dat upx behavioral2/memory/1460-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1828-26-0x0000000000500000-0x0000000000510000-memory.dmp upx -
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 1460 wrote to memory of 1828 1460 2024-02-18_51d072cca623f565d92a38598c641483_cryptolocker.exe 85 PID 1460 wrote to memory of 1828 1460 2024-02-18_51d072cca623f565d92a38598c641483_cryptolocker.exe 85 PID 1460 wrote to memory of 1828 1460 2024-02-18_51d072cca623f565d92a38598c641483_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-18_51d072cca623f565d92a38598c641483_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-18_51d072cca623f565d92a38598c641483_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1460 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:1828
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
64KB
MD5fd3548e37ac69c8c578e9383fe88a426
SHA1b9993f458dd6734ce286e366430a2754a6a32349
SHA25697308913d68bcd5f21c2dfb21326af38dae13ef0b9b9533b8fbf42068e44cbcc
SHA512c46655984cbd160b604c98e27c8edc3d2c76cd833715334127e1d6cbb39b80f4eb9728a95e4df71d34d487dec863948006a712cb8b3a3ba03286f6b80e8c16f5