Analysis
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max time kernel
151s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
14-05-2024 19:54
Behavioral task
behavioral1
Sample
2024-05-14_56b1920106a97f88c62af6a254525a5a_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-14_56b1920106a97f88c62af6a254525a5a_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-05-14_56b1920106a97f88c62af6a254525a5a_cryptolocker.exe
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Size
39KB
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MD5
56b1920106a97f88c62af6a254525a5a
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SHA1
4001dd6a5e283e9eeab964727f7c7d801e8ea726
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SHA256
14253d48cbf317374465e31f37e4876ec58c1031992e4d0d9cfc965ca76927f1
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SHA512
ca67fee118abf82e216b37914e69c3b60d9aafd2c8a1684c9407496dd9687228367dd6a150c416cfac43a46bd3778fc780fcbf47dac56dbe6d099352f4f746ae
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY99:qDdFJy3QMOtEvwDpjjWMl7Tu
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1424-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1424-10-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002325a-14.dat CryptoLocker_rule2 behavioral2/memory/2464-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2464-29-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1424-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1424-10-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000002325a-14.dat CryptoLocker_set1 behavioral2/memory/2464-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2464-29-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1424-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1424-10-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000800000002325a-14.dat UPX behavioral2/memory/2464-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2464-29-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation 2024-05-14_56b1920106a97f88c62af6a254525a5a_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2464 asih.exe -
resource yara_rule behavioral2/memory/1424-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1424-10-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000800000002325a-14.dat upx behavioral2/memory/2464-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2464-29-0x0000000000500000-0x0000000000510000-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 1424 wrote to memory of 2464 1424 2024-05-14_56b1920106a97f88c62af6a254525a5a_cryptolocker.exe 90 PID 1424 wrote to memory of 2464 1424 2024-05-14_56b1920106a97f88c62af6a254525a5a_cryptolocker.exe 90 PID 1424 wrote to memory of 2464 1424 2024-05-14_56b1920106a97f88c62af6a254525a5a_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-14_56b1920106a97f88c62af6a254525a5a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-14_56b1920106a97f88c62af6a254525a5a_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1424 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2464
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4832 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:81⤵PID:2516
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD5cfd5cc8a48bd0baae3e9bc56095e4791
SHA1b057472f48377504588cf6bef24245ed888a4285
SHA2563e6b7decf55a6d8f58a8fa523b0e199ab35f120774954dd3bccf708a1b136ff1
SHA5126fe4cbd7edf733e6675c4f6096298d5b65a662052dd3de326112c7091cf9901d76a4acd59a000b9a0af25275c21451c622c9d4cbef197d9da7a8e52bc21142a1