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Analysis
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max time kernel
110s -
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
27/02/2024, 19:26
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-27_4141d21b9e4096dfa912fd45f355c7e1_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-02-27_4141d21b9e4096dfa912fd45f355c7e1_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-02-27_4141d21b9e4096dfa912fd45f355c7e1_cryptolocker.exe
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Size
49KB
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MD5
4141d21b9e4096dfa912fd45f355c7e1
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SHA1
85fc121d0075fefede08c1ecaea2dd861a725d19
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SHA256
14df634e3e23a37b6dfd6c035a41d0a3a78f30e16b220c353406ab043c46119f
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SHA512
afa379459a46412b840ed69ada45eaec53d95a6d6d73ec19c7963fb267e68bbaf4c13c6ebce0e14862014b40cf5523ec75c5064a29752077f24337b4518712da
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SSDEEP
768:bgX4zYcgTEu6QOaryfjqDlC6JFbK37Yl6dIKld5CSz8:bgGYcA/53GAA6y37Q6dI+d5b8
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000700000002324a-12.dat CryptoLocker_rule2 -
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 2024-02-27_4141d21b9e4096dfa912fd45f355c7e1_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4280 hasfj.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 2380 wrote to memory of 4280 2380 2024-02-27_4141d21b9e4096dfa912fd45f355c7e1_cryptolocker.exe 97 PID 2380 wrote to memory of 4280 2380 2024-02-27_4141d21b9e4096dfa912fd45f355c7e1_cryptolocker.exe 97 PID 2380 wrote to memory of 4280 2380 2024-02-27_4141d21b9e4096dfa912fd45f355c7e1_cryptolocker.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-27_4141d21b9e4096dfa912fd45f355c7e1_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-27_4141d21b9e4096dfa912fd45f355c7e1_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2380 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:4280
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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=3716 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:81⤵PID:5040
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
49KB
MD5d701c28a3f9e7d6e1b2ac918797271ff
SHA10d86b20d8bfacee32b50c2e8677f7ccbfe04165e
SHA2563b684e8b8c586ae10c34bd24fbfb6f7d0964fceb0db8803925d859881e10c796
SHA512b9476a69e104c1457f57acd16b441190d0fca63d56f5ac42c44bb7f0eb224610d56dde643228afd847e5e739da01487409eef80c0e103d4fe5201be771c902ff