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Analysis
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max time kernel
148s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
25/05/2024, 22:38
Behavioral task
behavioral1
Sample
2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe
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Size
40KB
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MD5
c38b60dc32d8fcd469456ab13d8d81f7
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SHA1
e4a7478debe6448c97c4bf0f5f2ad94bc4237579
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SHA256
ca74d371515ec859319c06c21607ec1864ff5a2197745a7b7c17d7ca082a3243
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SHA512
53d0f8f0f2731af41bc398dc1e706dfa139a952182c4cee983787fe1e8cf1bbde52162b27884752d0f790924e577f510f19204b929c095dc452d90ddfe594b80
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY91:qDdFJy3QMOtEvwDpjjWMl7T+
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3856-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000235e3-13.dat CryptoLocker_rule2 behavioral2/memory/3724-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3856-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3724-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3856-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00090000000235e3-13.dat CryptoLocker_set1 behavioral2/memory/3724-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3856-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3724-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3856-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00090000000235e3-13.dat UPX behavioral2/memory/3724-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3856-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3724-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation 2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3724 asih.exe -
resource yara_rule behavioral2/memory/3856-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x00090000000235e3-13.dat upx behavioral2/memory/3724-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3856-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3724-27-0x0000000000500000-0x0000000000510000-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 3856 wrote to memory of 3724 3856 2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe 90 PID 3856 wrote to memory of 3724 3856 2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe 90 PID 3856 wrote to memory of 3724 3856 2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-25_c38b60dc32d8fcd469456ab13d8d81f7_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3856 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3724
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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 --field-trial-handle=3756,i,13879737908471496610,15335851594401413307,262144 --variations-seed-version --mojo-platform-channel-handle=4296 /prefetch:81⤵PID:2592
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD54793968d029aa0fa9bbc90e155a4e830
SHA1200ab7a36d4234705d56bdd33b40953603dd4718
SHA256c94e918ceb51724ef1499350690deab8b357f3c93e57359e5b3d92526afe0d0d
SHA512fba583368f3c571046bdb40c38b5385cf011415768a37a1d7bf74e6ae84f27715828418d4b99088047000e9073009e769d0cb2e93009de189a64971f009f81a4