Analysis
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max time kernel
90s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
22-05-2024 03:46
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe
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Size
5.5MB
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MD5
2c30683fca6fb9982c8ba3353c57c58d
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SHA1
94b2b224b5d1042f3306e73411b3c143ef29b64b
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SHA256
9932ed79d7958609a1af7203f19c38744d001aefabb751fb857d3cdd8d876973
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SHA512
81051a1fdb183afa645c5b4f736fc43951d0780c0dd7e4685a8bd4ecc37d955db7871eb43abf55c57793c1e7ff13cb795c6d2cb05e2ad69c864e6a344166359a
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SSDEEP
98304:ot1QKvyjzO6B3DenIMmzyxD++XsBq+JUieGNt3sB/a1Ed9m+Ufg:otTvgz73XMpxDbcwYvt3sFa4Og
Malware Config
Signatures
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Detection of CryptoLocker Variants 10 IoCs
Processes:
resource yara_rule behavioral2/memory/1824-0-0x0000000008000000-0x0000000008884000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1824-2-0x0000000008000000-0x0000000008884000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1824-4-0x0000000008000000-0x0000000008884000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\lossy.exe CryptoLocker_rule2 behavioral2/memory/1824-17-0x0000000008000000-0x0000000008884000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1824-21-0x0000000008000000-0x0000000008884000-memory.dmp CryptoLocker_rule2 behavioral2/memory/988-25-0x0000000008000000-0x0000000008884000-memory.dmp CryptoLocker_rule2 behavioral2/memory/988-24-0x0000000008000000-0x0000000008884000-memory.dmp CryptoLocker_rule2 behavioral2/memory/988-26-0x0000000008000000-0x0000000008884000-memory.dmp CryptoLocker_rule2 behavioral2/memory/988-34-0x0000000008000000-0x0000000008884000-memory.dmp CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation 2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
lossy.exepid process 988 lossy.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exelossy.exepid process 1824 2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe 1824 2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe 988 lossy.exe 988 lossy.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exedescription pid process target process PID 1824 wrote to memory of 988 1824 2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe lossy.exe PID 1824 wrote to memory of 988 1824 2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe lossy.exe PID 1824 wrote to memory of 988 1824 2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe lossy.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-22_2c30683fca6fb9982c8ba3353c57c58d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\lossy.exeFilesize
5.5MB
MD553ad1971cb9b634dec14914ae25e4309
SHA170bc5529be3295fe682290f4631a0a57e64b5b53
SHA256bce4c7920d82d4411ffdc3f7c929f43e7400038fa4222288a176c2f2afacaa57
SHA512ce7945bc2fde6b7c2f3632897a3425987a591fbc3f9920351968b4cddfd8fb37a82a009fecc21852b84193ebce93c8c8a9320def0ed6d6e64d45eb7b4f8df4bd
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memory/988-34-0x0000000008000000-0x0000000008884000-memory.dmpFilesize
8.5MB
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memory/988-26-0x0000000008000000-0x0000000008884000-memory.dmpFilesize
8.5MB
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memory/988-24-0x0000000008000000-0x0000000008884000-memory.dmpFilesize
8.5MB
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memory/988-25-0x0000000008000000-0x0000000008884000-memory.dmpFilesize
8.5MB
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memory/988-23-0x0000000000560000-0x0000000000561000-memory.dmpFilesize
4KB
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memory/1824-4-0x0000000008000000-0x0000000008884000-memory.dmpFilesize
8.5MB
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memory/1824-6-0x00000000005E0000-0x00000000005E6000-memory.dmpFilesize
24KB
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memory/1824-17-0x0000000008000000-0x0000000008884000-memory.dmpFilesize
8.5MB
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memory/1824-21-0x0000000008000000-0x0000000008884000-memory.dmpFilesize
8.5MB
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memory/1824-22-0x000000000800A000-0x0000000008303000-memory.dmpFilesize
3.0MB
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memory/1824-5-0x00000000005C0000-0x00000000005C6000-memory.dmpFilesize
24KB
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memory/1824-0-0x0000000008000000-0x0000000008884000-memory.dmpFilesize
8.5MB
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memory/1824-1-0x0000000000490000-0x0000000000491000-memory.dmpFilesize
4KB
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memory/1824-3-0x000000000800A000-0x0000000008303000-memory.dmpFilesize
3.0MB
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memory/1824-2-0x0000000008000000-0x0000000008884000-memory.dmpFilesize
8.5MB