Analysis
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max time kernel
143s -
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
13-06-2024 03:31
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe
Resource
win7-20240611-en
Behavioral task
behavioral2
Sample
2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe
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Size
49KB
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MD5
3fd61b31baa1af575b0a5ad9d014cda5
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SHA1
97cdede891cd87abfb8fc7c681fdba2a87794c17
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SHA256
439758450f01d706be42f700251f74cf7d9afa81282c6c81a734cea6e0b2f8b4
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SHA512
c40314de5f4234eb3c952655b6c37b9bcc975f61c07ee91a9f684c98003c43511d44569fc9b93a47a73ecf5fac9f170cbcf9379cbb5ba8cb9ceafc84c3075f84
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SSDEEP
768:P6LsoVEeegiZPvEhHSP+gp/QtOOtEvwDpjBBMLZdzuqpXsiE8Wq/Dpkcc1o:P6Q0ElP6G+gJQMOtEvwDpjB8WMlfL
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1140-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002323f-13.dat CryptoLocker_rule2 behavioral2/memory/1140-24-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/628-26-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/1140-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000002323f-13.dat CryptoLocker_set1 behavioral2/memory/1140-24-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/628-26-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 -
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 2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 628 asih.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 1140 wrote to memory of 628 1140 2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe 91 PID 1140 wrote to memory of 628 1140 2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe 91 PID 1140 wrote to memory of 628 1140 2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1140 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:628
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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=1340 --field-trial-handle=2356,i,13261194862334667799,7441241219475888176,262144 --variations-seed-version /prefetch:81⤵PID:5044
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
49KB
MD54690cce6e4a9aaf1c6619ecdac12dd99
SHA1fd4e5402de2d97fe2c8a185f18760a9b398e070e
SHA25656df8b1101eb19da8fc7afeb732c99dd16b982c54332819e8db142861a7fa577
SHA51276d51a0e39cde24aef3622e4fe2a48dd6025fc6f33adfe35591de6e22d7acea3070a91112f8287115db20e8278c6a8c6e5767aaedc6636d43bfb12b708013f00