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Analysis
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max time kernel
150s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
16/03/2024, 10:39
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe
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Size
46KB
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MD5
a76f75c83e66a940d4c9e57e9127bd11
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SHA1
bd3627286928dafb25b6ecdd239e322f7b2cba14
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SHA256
c7724412a81fd3400def867f2bd763015a3c26fee6df794112a5b7c07a9c7ff7
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SHA512
43d73df335ae55987e02efd6c63ddf1e39957cd5e88eb0dac8c72de08a4d617f742b48e5b2584ffc3fac4567fd893cb483eaf2bec512999b140115b99004810a
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SSDEEP
768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo2pa:qmbhXDmjr5MOtEvwDpj5cDtKkQZQL
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1556-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002333f-13.dat CryptoLocker_rule2 behavioral2/memory/1556-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/988-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/1556-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/988-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/1556-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000800000002333f-13.dat UPX behavioral2/memory/1556-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/988-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation 2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 988 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 1556 wrote to memory of 988 1556 2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe 96 PID 1556 wrote to memory of 988 1556 2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe 96 PID 1556 wrote to memory of 988 1556 2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe 96
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1556 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:988
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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=3472 --field-trial-handle=2260,i,3303482231723870786,2954015409682154873,262144 --variations-seed-version /prefetch:81⤵PID:4352
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
47KB
MD564bc3406ada4574fe9c6396458b2d74e
SHA13e2ce8fbff85bf64679dfb493388d7c5e37c73fd
SHA2569a0db462352aa0016e6166e25dc2bf8a16718e530501c8ce78c444bdc518de2a
SHA5124b170920fc9de77c422c1dd4d9e51aa5fd280d89d49e3e56fb35b45df7dcc75da245b05594edc30533bea168321a4579e144d6e5b477f7d0d277dd97113cb01f