Analysis
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max time kernel
149s -
max time network
155s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
30-05-2024 06:29
Behavioral task
behavioral1
Sample
2024-05-30_1b59d37c2d0fc309eea0e3906e17ed64_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-30_1b59d37c2d0fc309eea0e3906e17ed64_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-30_1b59d37c2d0fc309eea0e3906e17ed64_cryptolocker.exe
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Size
90KB
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MD5
1b59d37c2d0fc309eea0e3906e17ed64
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SHA1
a533fc0efd14ff91411790bacf33ef9895849507
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SHA256
5a7f44b12704457527c5ceb47d8764e20167c3a2fa83e05251a2b653be9fc01c
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SHA512
03d3b96e5bd016a12681b094990e49fadce4996b86d5e5005ee3546a81ae23a24def1aede1530b576297ceda431cb0716b7fc02f5ee03b0e5ed5b8b662a4daff
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SSDEEP
1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/x:n6a+1SEOtEvwDpjYYvQd2Py
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/2956-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000b000000015a2d-11.dat CryptoLocker_rule2 behavioral1/memory/2956-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3016-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3016-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/2956-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000b000000015a2d-11.dat CryptoLocker_set1 behavioral1/memory/2956-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/3016-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/3016-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/2956-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000b000000015a2d-11.dat UPX behavioral1/memory/2956-15-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/3016-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/3016-26-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 3016 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2956 2024-05-30_1b59d37c2d0fc309eea0e3906e17ed64_cryptolocker.exe -
resource yara_rule behavioral1/memory/2956-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x000b000000015a2d-11.dat upx behavioral1/memory/2956-15-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/3016-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/3016-26-0x0000000000500000-0x0000000000510000-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 2956 wrote to memory of 3016 2956 2024-05-30_1b59d37c2d0fc309eea0e3906e17ed64_cryptolocker.exe 28 PID 2956 wrote to memory of 3016 2956 2024-05-30_1b59d37c2d0fc309eea0e3906e17ed64_cryptolocker.exe 28 PID 2956 wrote to memory of 3016 2956 2024-05-30_1b59d37c2d0fc309eea0e3906e17ed64_cryptolocker.exe 28 PID 2956 wrote to memory of 3016 2956 2024-05-30_1b59d37c2d0fc309eea0e3906e17ed64_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-30_1b59d37c2d0fc309eea0e3906e17ed64_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-30_1b59d37c2d0fc309eea0e3906e17ed64_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2956 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3016
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
91KB
MD54b938be5204628bb7ebda37966fe9d86
SHA1d3320178b5e945247f029fc0711971ba73f80d80
SHA256ff6537ed172846cc1e8879cd1033069a778c6379ad94129828bda138b9b39a3d
SHA512f7309ea2cf5f12bbbd5f106d3da1453e5a677260ecb3f80e0e333123bac77bf33c3b5f5b3b1f98cfe02849cd85129c0139ee768cd055590ac0bfcfa4ff461a08