Analysis
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max time kernel
140s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
25-01-2024 17:23
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-25_20309665803a62547fee04e56ebdbb21_cryptolocker.exe
Resource
win7-20231215-en
General
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Target
2024-01-25_20309665803a62547fee04e56ebdbb21_cryptolocker.exe
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Size
41KB
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MD5
20309665803a62547fee04e56ebdbb21
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SHA1
2065d446f8e9dfebef934c2e772a7953b4dde2d7
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SHA256
3345d43851ca8e0ff56d94ca6812889422a103963c26f4f5c3dcf946e0dfd9fa
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SHA512
ce3b0809ab380299d4367bd9ae26ef065efe3acb06d5ed54c51f8500fbef9ac4654317de43882d41d01adc15e43a872b8c509f0059818fda0660345d9b66f652
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SSDEEP
768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6j4AYsqSh+DETked3z:YGzl5wjRQBBOsP1QMOtEvwDpjl39+D+/
Malware Config
Signatures
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Detection of CryptoLocker Variants 3 IoCs
Processes:
resource yara_rule behavioral2/memory/4756-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/4756-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
Processes:
resource yara_rule behavioral2/memory/4756-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/4756-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-01-25_20309665803a62547fee04e56ebdbb21_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation 2024-01-25_20309665803a62547fee04e56ebdbb21_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 4620 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
Processes:
2024-01-25_20309665803a62547fee04e56ebdbb21_cryptolocker.exedescription pid process target process PID 4756 wrote to memory of 4620 4756 2024-01-25_20309665803a62547fee04e56ebdbb21_cryptolocker.exe asih.exe PID 4756 wrote to memory of 4620 4756 2024-01-25_20309665803a62547fee04e56ebdbb21_cryptolocker.exe asih.exe PID 4756 wrote to memory of 4620 4756 2024-01-25_20309665803a62547fee04e56ebdbb21_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_20309665803a62547fee04e56ebdbb21_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_20309665803a62547fee04e56ebdbb21_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4756 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4620
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
41KB
MD5f20f164c7bbfadc371357dcfe5e05238
SHA1cdbb4e16275104f8fe87d34b161b7e09f76c1d14
SHA256521327b6f667c74cfe9c079441f45ab05c088dfe38abe56f16cba4c67e2aa9cb
SHA51252e254eb1e47ccb6ad7fa96f81415c456781292d1f00982badfff1347b053304bd034f826a8e1d79f0798957804a48639bcc78fe6a410a24dd55ffdaf7988664
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memory/4620-19-0x00000000004F0000-0x00000000004F6000-memory.dmpFilesize
24KB
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memory/4620-22-0x00000000004D0000-0x00000000004D6000-memory.dmpFilesize
24KB
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memory/4756-0-0x0000000000500000-0x000000000050B000-memory.dmpFilesize
44KB
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memory/4756-1-0x00000000006A0000-0x00000000006A6000-memory.dmpFilesize
24KB
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memory/4756-2-0x00000000006A0000-0x00000000006A6000-memory.dmpFilesize
24KB
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memory/4756-3-0x0000000002100000-0x0000000002106000-memory.dmpFilesize
24KB
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memory/4756-17-0x0000000000500000-0x000000000050B000-memory.dmpFilesize
44KB