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Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
21/02/2024, 19:55
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe
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Size
99KB
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MD5
bac9c90bfc1aba30f7f1e346561ba66b
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SHA1
d18bde7922c91ab9fd4decc508e54fe60544d6cd
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SHA256
1726b9d5ced2ab7f5c30d08ccd8e6cafcf2525825deed08a7564b600337d582a
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SHA512
e7dc693ec189a60dc59270e1e77ed5b8ab49a630bb374b99414b6e0ef36f2f3c07504cc8252d85ea4b36d2bca56e02a64b8c2a6d11c5d2cd58d7006f2d65a69b
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SSDEEP
768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJHlv/k2i:xj+VGMOtEvwDpjubwQEIiVmkxv/u
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4604-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000600000002322d-13.dat CryptoLocker_rule2 behavioral2/memory/4604-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3220-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3220-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4604-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000600000002322d-13.dat CryptoLocker_set1 behavioral2/memory/4604-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3220-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3220-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 5 IoCs
resource yara_rule behavioral2/memory/4604-0-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x000600000002322d-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/4604-17-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3220-18-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3220-27-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress -
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-1-5-21-1414748551-1520717498-2956787782-1000\Control Panel\International\Geo\Nation 2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3220 misid.exe -
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 4604 wrote to memory of 3220 4604 2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe 86 PID 4604 wrote to memory of 3220 4604 2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe 86 PID 4604 wrote to memory of 3220 4604 2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4604 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:3220
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
100KB
MD5e15a4c14fa98d0990b774782620725c6
SHA18092a9ce3225d66e169efdfb748068923d9c146b
SHA2560923726b7b4cd63b00a25f46ea6ca355c5803ad1db1b9dd01f94775c287a44eb
SHA5128c95f550fa17b1fb86e840ec6099b42c1309a96d080cf419a3c80bc01cfd7ea987a7071f24bc26789889e1bef1586b14f891595a04455c809488c61e51fe78a6