Analysis
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max time kernel
148s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240419-en -
resource tags
arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system -
submitted
10/06/2024, 21:37
Behavioral task
behavioral1
Sample
2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe
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Size
80KB
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MD5
a21c08c3ea498909e478defc9461c09d
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SHA1
e2b80962de7e62689402c5fdb18dc82e4213856d
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SHA256
cf7267048f58fa1be4bdcd8524efb028a1d5bf8cb85a311d553544a212b7de8c
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SHA512
1de7472874b843cdf4ffba91a1bfb34e2c7177f1a4410769774bdb7f894720ed2f7aa59fb0ddb5e14d7947cdda3f42c0a2632f8c4c37b366f489fee97c434e0f
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRhD:T6a+rdOOtEvwDpjNtQ
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000b000000012279-11.dat CryptoLocker_rule2 behavioral1/memory/2668-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2844-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2668-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000b000000012279-11.dat CryptoLocker_set1 behavioral1/memory/2668-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2844-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2668-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000b000000012279-11.dat UPX behavioral1/memory/2668-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2844-15-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2668-25-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2668 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2844 2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe -
resource yara_rule behavioral1/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x000b000000012279-11.dat upx behavioral1/memory/2668-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2844-15-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2668-25-0x0000000000500000-0x0000000000510000-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 2844 wrote to memory of 2668 2844 2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe 28 PID 2844 wrote to memory of 2668 2844 2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe 28 PID 2844 wrote to memory of 2668 2844 2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe 28 PID 2844 wrote to memory of 2668 2844 2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2844 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2668
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
80KB
MD5655e29d5362a718e0eaa02a2a6fec858
SHA1f0b089eb05447160f662afe3e50d1a0f0869f3f4
SHA256dda0ccf9063b5984ca800c0e6b412e40710dbe3a57c0a2a2e2a7a0cb9d9880e5
SHA51261515707ac70050b803d79585c69e4b085237f3bb7dff1725d80659d349ca43b9c49661b77700d490f02d498a15c20ba472f985b6249465ad791b4abd1fc73fa