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Analysis
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max time kernel
148s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
23/01/2024, 19:02
Behavioral task
behavioral1
Sample
2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe
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Size
93KB
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MD5
d9fd8fc693da7eddce1cce6b5f72b3d6
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SHA1
714e4f9d6efcad152c0a3fddbfc10d4a42874779
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SHA256
030379cb0c88b8de439c03ff95bae7f8eb105258306b04e9087a802098749d57
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SHA512
af310ca0f21cec5bd495978ee92bca8760dabacc5fa003cf5bfbec0f85310c60cd3f21455e0ee133d82d2b0b920d3b3b14135252e87a4c9e1412299b78b0c4ac
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01Eq:AnBdOOtEvwDpj6z1
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3044-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0009000000022480-13.dat CryptoLocker_rule2 behavioral2/memory/3044-20-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/748-26-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/3044-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0009000000022480-13.dat CryptoLocker_set1 behavioral2/memory/3044-20-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/748-26-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/3044-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x0009000000022480-13.dat UPX behavioral2/memory/3044-20-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/748-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 748 asih.exe -
resource yara_rule behavioral2/memory/3044-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x0009000000022480-13.dat upx behavioral2/memory/3044-20-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/748-26-0x0000000000500000-0x000000000050F000-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 3044 wrote to memory of 748 3044 2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe 89 PID 3044 wrote to memory of 748 3044 2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe 89 PID 3044 wrote to memory of 748 3044 2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3044 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:748
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
93KB
MD553271335206eb423282c2f17f3f86256
SHA159e52d11cf892159511901f1e476250c223aa2f6
SHA256de5dfc06be1b9f688adfecd38033c0c130a606367416bc1f5bb6b4ff90bb5d87
SHA51237d42d5b48b8c882a7b1cba2b2e5b8e7a45ab5e3f8b3cdd4b29785c0ae993c528e96a4919978629c2f2910558eaa37ca1d90ebba1d00afd692c00af1854d17bc