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Analysis
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max time kernel
148s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
20/04/2024, 08:30
Behavioral task
behavioral1
Sample
2024-04-20_62b89cde4629503c02210a385b551df6_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-20_62b89cde4629503c02210a385b551df6_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-20_62b89cde4629503c02210a385b551df6_cryptolocker.exe
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Size
96KB
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MD5
62b89cde4629503c02210a385b551df6
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SHA1
f64ca65eea7680f940f6cc8a52d22d76964b5028
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SHA256
2f15c09dc613d992685f3de0c82a0170f2895e1ea04c465b253a14e5f9705c6c
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SHA512
fde0e9cdfc9b678ff70e15714aa7cb5d670fb67945a9d23b7d0f2439527bb22c19ce3dd62f473b5e26df3d23cf0f34b6445490e4d0f1625b205a3f572160856b
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpYy9pL:AnBdOOtEvwDpj6zQ
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/832-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000300000001e97a-13.dat CryptoLocker_rule2 behavioral2/memory/832-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3556-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3556-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/832-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000300000001e97a-13.dat CryptoLocker_set1 behavioral2/memory/832-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3556-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3556-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/832-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x000300000001e97a-13.dat UPX behavioral2/memory/832-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3556-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3556-27-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation 2024-04-20_62b89cde4629503c02210a385b551df6_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3556 asih.exe -
resource yara_rule behavioral2/memory/832-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x000300000001e97a-13.dat upx behavioral2/memory/832-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3556-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3556-27-0x0000000000500000-0x000000000050F000-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 3 IoCs
description pid Process procid_target PID 832 wrote to memory of 3556 832 2024-04-20_62b89cde4629503c02210a385b551df6_cryptolocker.exe 86 PID 832 wrote to memory of 3556 832 2024-04-20_62b89cde4629503c02210a385b551df6_cryptolocker.exe 86 PID 832 wrote to memory of 3556 832 2024-04-20_62b89cde4629503c02210a385b551df6_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-20_62b89cde4629503c02210a385b551df6_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-20_62b89cde4629503c02210a385b551df6_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:832 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3556
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
97KB
MD5a0a9a8a43b1d295ed94d69a5cf772825
SHA14cf78f85cc4739b713395bfb9f7ceac2301fae02
SHA256783fed882d380a7ae448ff3ee4ae448c7556d2651f0e1ed613d9e42a762115db
SHA512343ebc0d99700508621d583d2001c8bcf5e60303fe7f3b3e6456f40ea33b608032008b3bdec8a17fb03cf1e86d28110b2fcc756103c58bcee16c0bc2c2334f26