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Analysis
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max time kernel
150s -
max time network
142s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
06/03/2024, 00:46
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-06_4a42e0431127a0e62be18f5754c7b129_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-06_4a42e0431127a0e62be18f5754c7b129_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-06_4a42e0431127a0e62be18f5754c7b129_cryptolocker.exe
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Size
32KB
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MD5
4a42e0431127a0e62be18f5754c7b129
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SHA1
d621755431e475dbd1800f2bb67442c1ec10a8ff
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SHA256
d33478106776d91ce9c16eeb1c93878c6d30d1efb5ba1e08ea52820e5fdd38bf
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SHA512
1e2f7f25a8cb4b239cabf5044f67cc69acd3b8125002d5a866c4e7a1e3303cc4933a1d8792052eef2078d55296a848394b37db9b0f3ee8e8d23361ad3438a3ba
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SSDEEP
768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+4tHmNg8:q0zizzOSxMOtEvwDpj/arqc5
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/1544-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000b00000001224c-11.dat CryptoLocker_rule2 behavioral1/memory/1544-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2108-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2108-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral1/memory/1544-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/1544-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2108-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2108-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/1544-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000b00000001224c-11.dat UPX behavioral1/memory/1544-15-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2108-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2108-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2108 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 1544 2024-03-06_4a42e0431127a0e62be18f5754c7b129_cryptolocker.exe -
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 1544 wrote to memory of 2108 1544 2024-03-06_4a42e0431127a0e62be18f5754c7b129_cryptolocker.exe 28 PID 1544 wrote to memory of 2108 1544 2024-03-06_4a42e0431127a0e62be18f5754c7b129_cryptolocker.exe 28 PID 1544 wrote to memory of 2108 1544 2024-03-06_4a42e0431127a0e62be18f5754c7b129_cryptolocker.exe 28 PID 1544 wrote to memory of 2108 1544 2024-03-06_4a42e0431127a0e62be18f5754c7b129_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-06_4a42e0431127a0e62be18f5754c7b129_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-06_4a42e0431127a0e62be18f5754c7b129_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1544 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2108
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
32KB
MD56f2ee460e4041e082251a82db7f40bc3
SHA17a205ac3d8010832d9089940cfc6811dd3846748
SHA256cdb6db81c3aeee16afa9d58c395b0830284c4404c406a3a76349c9536447d623
SHA5127de30cf96f117126e873eb563fc3b1f87d323c36f8e3c4b7480993fcb7424709faf0b11247aa013d8af9a431cce31d20ad5f8ad9ad966e33a29853f0d04a6704