Analysis
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max time kernel
149s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
06/03/2024, 01:57
Behavioral task
behavioral1
Sample
2024-03-06_c5c07924cdeb9ebfc73f9cc52c73ada1_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-06_c5c07924cdeb9ebfc73f9cc52c73ada1_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-06_c5c07924cdeb9ebfc73f9cc52c73ada1_cryptolocker.exe
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Size
81KB
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MD5
c5c07924cdeb9ebfc73f9cc52c73ada1
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SHA1
22400e1bb324abd0eb5a1b714178c92e243f397e
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SHA256
9e2b31e563ee3f8631a61d27b79fb96ed7ece55774e01628a56b83c39df341fe
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SHA512
370f06f2631e1fa2c71a563271a5c830578d42e5184dc12e323d45fd8d0d2771ed252e2777acf506ca3b5f3e946c1e5de9b307f26dd0a6673d674f70792cbf2d
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SSDEEP
1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky2fA:zCsanOtEvwDpje
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2260-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000400000001e5eb-13.dat CryptoLocker_rule2 behavioral2/memory/2260-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4216-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4216-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2260-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000400000001e5eb-13.dat CryptoLocker_set1 behavioral2/memory/2260-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4216-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4216-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2260-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000400000001e5eb-13.dat UPX behavioral2/memory/2260-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4216-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4216-27-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation 2024-03-06_c5c07924cdeb9ebfc73f9cc52c73ada1_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4216 misid.exe -
resource yara_rule behavioral2/memory/2260-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000400000001e5eb-13.dat upx behavioral2/memory/2260-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4216-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4216-27-0x0000000000500000-0x0000000000510000-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 3 IoCs
description pid Process procid_target PID 2260 wrote to memory of 4216 2260 2024-03-06_c5c07924cdeb9ebfc73f9cc52c73ada1_cryptolocker.exe 87 PID 2260 wrote to memory of 4216 2260 2024-03-06_c5c07924cdeb9ebfc73f9cc52c73ada1_cryptolocker.exe 87 PID 2260 wrote to memory of 4216 2260 2024-03-06_c5c07924cdeb9ebfc73f9cc52c73ada1_cryptolocker.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-06_c5c07924cdeb9ebfc73f9cc52c73ada1_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-06_c5c07924cdeb9ebfc73f9cc52c73ada1_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2260 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:4216
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
82KB
MD54dc05e209e13477e257ccef144ce06c1
SHA1c0b2f38644b0a5e98e47685e1977247c70b6ea6c
SHA2567ae2d06a77038154d9fcb1a829e5bbbb7e5762b4f1911d76e4cd7b599963a83e
SHA51257197d5c9f5b75edf8dac9bb72e8d92f265815273ea2adf568bab171d6dc202f31bc67dcb262bf9537096a99098e428f94ba8a4ac33b1fd5e6592376f19b39ce