Analysis
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max time kernel
149s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
09/03/2024, 12:38
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-09_e26ff80798321ba13a6ac3105623c82a_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-03-09_e26ff80798321ba13a6ac3105623c82a_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-03-09_e26ff80798321ba13a6ac3105623c82a_cryptolocker.exe
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Size
57KB
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MD5
e26ff80798321ba13a6ac3105623c82a
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SHA1
c80950fbfaa094eaef3e7a2164afe62f8c7df1f8
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SHA256
6785b0cf829a8acce7c4b5e6138cf2fc57909728526f6c0c2f24594b4d262dd2
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SHA512
65a394df5647b606f1f14879b7091d6c0f3e172d7b13059190050da1525d20a5cc14c76baffe244e5050d6eb515b48e2fedb520aeb528140bc103463a1858722
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SSDEEP
768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7Gowfj6Eit:xj+VGMOtEvwDpjubEgC
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4980-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023039-13.dat CryptoLocker_rule2 behavioral2/memory/4980-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/552-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/552-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4980-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0007000000023039-13.dat CryptoLocker_set1 behavioral2/memory/4980-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/552-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/552-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 5 IoCs
resource yara_rule behavioral2/memory/4980-0-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x0007000000023039-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/4980-18-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/552-17-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/552-27-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress -
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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation 2024-03-09_e26ff80798321ba13a6ac3105623c82a_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 552 misid.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 4980 wrote to memory of 552 4980 2024-03-09_e26ff80798321ba13a6ac3105623c82a_cryptolocker.exe 85 PID 4980 wrote to memory of 552 4980 2024-03-09_e26ff80798321ba13a6ac3105623c82a_cryptolocker.exe 85 PID 4980 wrote to memory of 552 4980 2024-03-09_e26ff80798321ba13a6ac3105623c82a_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-09_e26ff80798321ba13a6ac3105623c82a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-09_e26ff80798321ba13a6ac3105623c82a_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4980 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:552
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
57KB
MD52108a2fb6db1e3ada8493e11c0b7eb4a
SHA1fe2d58422dadffadb76c0ff642c0772c6a30588a
SHA25606a53de3a73f181231dd4776db63ce76b541b9144d60c54eed737a76d8bfd7f6
SHA5125219dfce08802d32e096c3de9e23a99b7816ad9e4851a74ae6e5a96572c597ca482c3df9811e9de1001e570bb51b5f314082b60c84b276e19a4ac3f9c90bb574