Analysis
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max time kernel
146s -
max time network
162s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 21:43
Behavioral task
behavioral1
Sample
2024-06-10_f23d3106fdd4e6193c79d4b333731016_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-10_f23d3106fdd4e6193c79d4b333731016_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-10_f23d3106fdd4e6193c79d4b333731016_cryptolocker.exe
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Size
91KB
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MD5
f23d3106fdd4e6193c79d4b333731016
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SHA1
c4ab05f9b832711597a0cc54c91f851705372ee1
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SHA256
8b457ca6057494896c71260c426a73e4413867c0d63c11cb68d38b2da649698a
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SHA512
0b0fe4457dd922ef3ce199e334856b7bba84f7326bf98ff07b550061c3bd86a9408dcd12c82607ae5a5e8b6c03ff3ff6dc0f21dcf744a8af3924032842220ef1
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SSDEEP
1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyuF8:n6a+1SEOtEvwDpjYYvQd2PW
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4768-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000900000002324b-13.dat CryptoLocker_rule2 behavioral2/memory/4768-14-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1484-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/4768-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000900000002324b-13.dat CryptoLocker_set1 behavioral2/memory/4768-14-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1484-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/4768-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000900000002324b-13.dat UPX behavioral2/memory/4768-14-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1484-26-0x0000000000500000-0x0000000000510000-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 2024-06-10_f23d3106fdd4e6193c79d4b333731016_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1484 asih.exe -
resource yara_rule behavioral2/memory/4768-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000900000002324b-13.dat upx behavioral2/memory/4768-14-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1484-26-0x0000000000500000-0x0000000000510000-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 4768 wrote to memory of 1484 4768 2024-06-10_f23d3106fdd4e6193c79d4b333731016_cryptolocker.exe 94 PID 4768 wrote to memory of 1484 4768 2024-06-10_f23d3106fdd4e6193c79d4b333731016_cryptolocker.exe 94 PID 4768 wrote to memory of 1484 4768 2024-06-10_f23d3106fdd4e6193c79d4b333731016_cryptolocker.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_f23d3106fdd4e6193c79d4b333731016_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_f23d3106fdd4e6193c79d4b333731016_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4768 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1484
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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=4012 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:81⤵PID:2932
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
91KB
MD59e884791485b563d4e5d2c7a9050e57f
SHA167cc987d9b0f16503d94f0c5ed61457df793bb90
SHA2564db7708147ee9692141e86bd09d21f946ff1e28fec57f35545bbf8cb0e702b09
SHA5123a5e781af38af3ef5da1444990ff18188604a887c457b49402eaece459bb02343e1142159635fb233e9348b63c3ad6c5cb72ba03da551dddad03dd6c54ddac65