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Analysis
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max time kernel
145s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
18/04/2024, 12:36
Behavioral task
behavioral1
Sample
2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe
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Size
51KB
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MD5
59a5eb6ef8a2ce3f4da88feab58e563d
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SHA1
c09a037d7e785a6e1d7d26d8ec1792bbf48f80ed
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SHA256
b378d9cb56f4828ae28ac53603a8541346510e1484dc2f36abef2641f7487678
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SHA512
df8afcec514cb6d134593f2ecb7fa766ba7021eaf258ee1cee7d8f648ba631ff99b7504d2e4395b1eb0e5046b1cbdd14a3bd1299985aef80919119367d705cdd
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SSDEEP
768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOL:z6QFElP6n+gKmddpMOtEvwDpj31iL
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000b000000023227-13.dat CryptoLocker_rule2 behavioral2/memory/1380-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/452-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000b000000023227-13.dat CryptoLocker_set1 behavioral2/memory/1380-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/452-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000b000000023227-13.dat UPX behavioral2/memory/1380-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/452-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation 2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 452 asih.exe -
resource yara_rule behavioral2/memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000b000000023227-13.dat upx behavioral2/memory/1380-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/452-26-0x0000000000500000-0x0000000000510000-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 1380 wrote to memory of 452 1380 2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe 91 PID 1380 wrote to memory of 452 1380 2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe 91 PID 1380 wrote to memory of 452 1380 2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1380 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:452
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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=1860 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:81⤵PID:3080
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
51KB
MD53c8884b0826efa8171d4019908df8390
SHA1d83463e04cc71bd6ac5439e5427f63ed9c5f6f3c
SHA256502fc5d69ee7874692a83b71e4cb4992dc21262e36cba2dfeef68dd2d7c8a9ac
SHA51253ae411c9493dbf0d7daf966252f50df8565c86474cd40d0d754e19dfcdc8bf2062e8080bf933959bdc3a7f6210727237c6800cc064c1b8d58178a70e2202796