Analysis
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max time kernel
148s -
max time network
159s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
27/05/2024, 18:30
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-27_5a9ffdd7833030d87b93749e751c3d2c_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-05-27_5a9ffdd7833030d87b93749e751c3d2c_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-27_5a9ffdd7833030d87b93749e751c3d2c_cryptolocker.exe
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Size
46KB
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MD5
5a9ffdd7833030d87b93749e751c3d2c
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SHA1
ba417d5fe15a3b969c9009c4013f0bddbf6e4c3e
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SHA256
c68f89e4a44d59b21463bac470c09041680d109b9150437f05eabbe776f77079
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SHA512
9fd18dcaec4f39530be669e152604a2065ba3ea67b491f6d3dfc0336301dc99c80f7880c501e95bd1c1c6df6bbe561b1c654adca12fc7c9cd7d98d9cb8b0190e
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SSDEEP
768:P6LsoEEeegiZPvEhHS5+Mh/QtOOtEvwDpjBpaD3TUogs/VXpAPh+s:P6QFElP6k+MRQMOtEvwDpjBQpVXK+s
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1060-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000235f6-13.dat CryptoLocker_rule2 behavioral2/memory/3968-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1060-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3968-27-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1060-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00090000000235f6-13.dat CryptoLocker_set1 behavioral2/memory/3968-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/1060-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/3968-27-0x0000000000500000-0x000000000050B000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation 2024-05-27_5a9ffdd7833030d87b93749e751c3d2c_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3968 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 1060 wrote to memory of 3968 1060 2024-05-27_5a9ffdd7833030d87b93749e751c3d2c_cryptolocker.exe 90 PID 1060 wrote to memory of 3968 1060 2024-05-27_5a9ffdd7833030d87b93749e751c3d2c_cryptolocker.exe 90 PID 1060 wrote to memory of 3968 1060 2024-05-27_5a9ffdd7833030d87b93749e751c3d2c_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_5a9ffdd7833030d87b93749e751c3d2c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_5a9ffdd7833030d87b93749e751c3d2c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1060 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3968
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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=4300,i,18168883380598738769,14202261231630113808,262144 --variations-seed-version --mojo-platform-channel-handle=4184 /prefetch:81⤵PID:4584
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
46KB
MD5fb671ac634e05de92aa401a1b09b6709
SHA17108b8dd739206a63cceec4ef90b0907eb293bb9
SHA256cc1e884fa5d291fb1a1b0370d2d00d72ac8606e045347684d35a1755a63215f2
SHA5127965cd567a17324057fc26cf1b80532723e2b7fdb38ba2fbb091ab7ed8f318fd7c1d0837e6686bee895f760a8361f8ec044772a5de73cf6a287310fcee1354d3