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Analysis
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max time kernel
142s -
max time network
158s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
15/03/2024, 13:42
Behavioral task
behavioral1
Sample
2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe
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Size
82KB
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MD5
672cbd9ad71ad85c9dcce93e3de93766
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SHA1
c1651030b2776893a84faeec62c56e20a0a58f53
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SHA256
ced6ec3fd9c9428cfbcf6aeacfe4727438900ff9118b3b560bfe2f8668903ec1
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SHA512
2045c64adee57086f36be1a129b41fc66bdedea2baefcbfc493f1c403df9ca9c904aeb20032194642c6675e68b77fffdf7472b10ab71c62859f86aab2254ed13
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7G3:T6a+rdOOtEvwDpjNK
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3660-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002324b-13.dat CryptoLocker_rule2 behavioral2/memory/3660-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2984-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/3660-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000002324b-13.dat CryptoLocker_set1 behavioral2/memory/3660-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2984-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/3660-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000800000002324b-13.dat UPX behavioral2/memory/3660-25-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2984-26-0x0000000000500000-0x0000000000510000-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 2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2984 asih.exe -
resource yara_rule behavioral2/memory/3660-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000800000002324b-13.dat upx behavioral2/memory/3660-25-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2984-26-0x0000000000500000-0x0000000000510000-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 3660 wrote to memory of 2984 3660 2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe 100 PID 3660 wrote to memory of 2984 3660 2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe 100 PID 3660 wrote to memory of 2984 3660 2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe 100
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-15_672cbd9ad71ad85c9dcce93e3de93766_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3660 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2984
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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=1408 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:81⤵PID:3168
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
82KB
MD5c8e4e21839afbefd93543f2cd532cf57
SHA1e8504c4d2ec4e593555fd290ec3ecc5cdc02d4aa
SHA2568bfe3493061f1970e8203e3a0a099da850efff8c615099fe21ad693a38015deb
SHA512f2e7b056017fdaf1c818ec19d6f6f54f31a78592aa2b44c6c338209cc15b0d2dee2f5edf9a411e81b6561baa0c62467289b60cc5f1b271e1c3b8628c12e0ab6f