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Analysis
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max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
22/05/2024, 06:00
Behavioral task
behavioral1
Sample
2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe
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Size
91KB
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MD5
a5f8cc602876612217b18e06e3e2a9d5
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SHA1
4809902355c17a3dc37d6b0782edd3ec56222162
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SHA256
63f61cc3f925c2fde3a85a5ab4216e83d661c7ff113d0a93880ade956b03c70e
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SHA512
34a4d6714f845f1afd4ae0f1cab23325b76567d15601197e3840090b0e75fab76066603a43ff9dbcfae2b63e8afa69283b23970a779008c4898d819662fd92a9
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SSDEEP
1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/DO:n6a+1SEOtEvwDpjYYvQd2PZ
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral1/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000c0000000155f7-11.dat CryptoLocker_rule2 behavioral1/memory/2244-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2868-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral1/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000c0000000155f7-11.dat CryptoLocker_set1 behavioral1/memory/2244-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2868-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral1/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000c0000000155f7-11.dat UPX behavioral1/memory/2244-15-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2868-25-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2868 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2244 2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe -
resource yara_rule behavioral1/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x000c0000000155f7-11.dat upx behavioral1/memory/2244-15-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2868-25-0x0000000000500000-0x0000000000510000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2244 wrote to memory of 2868 2244 2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe 28 PID 2244 wrote to memory of 2868 2244 2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe 28 PID 2244 wrote to memory of 2868 2244 2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe 28 PID 2244 wrote to memory of 2868 2244 2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2244 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2868
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
91KB
MD5cd14f152dca7c0ae87fa2891b6cf516c
SHA161ac9165f9080b39a84ea818d17d61009fd13692
SHA256a5e039a24c5664175ef71f7c63e952faa586e981f2197c5c7c634408ede069e2
SHA51245cff9a546f978a8276fadfe2d8b0ad42689d967cb391af2dbe256a43813feee2939159e00e84a820f490a7947fa99b3f2eb64849c08e6d7b6696dade447bfcb