Analysis
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max time kernel
150s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
22-02-2024 13:45
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-22_5fa791410973dc5a959b69f48c12ea82_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-22_5fa791410973dc5a959b69f48c12ea82_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-22_5fa791410973dc5a959b69f48c12ea82_cryptolocker.exe
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Size
46KB
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MD5
5fa791410973dc5a959b69f48c12ea82
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SHA1
524539bcc4383d5c62191f3957973eef70ea8ae0
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SHA256
a77b88afcca0ba94a8c1d24c00c95c849e4d675134e82bfdd10af98bb613abe3
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SHA512
e195ce279d946254e8a9193474d9b07dd9234b7b8e60e0f9e3f448ed1e7a97da6dc75c53904e8556616c9c8e9f759aef5683215b6ef73dcf0180f359f5654c7b
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SSDEEP
768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLtldedQ:xj+VGMOtEvwDpjk/eu
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/2884-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00070000000231e0-13.dat CryptoLocker_rule2 behavioral2/memory/2884-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4688-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/2884-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00070000000231e0-13.dat CryptoLocker_set1 behavioral2/memory/2884-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4688-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/2884-0-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x00070000000231e0-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/2884-17-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/4688-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2200714112-3788720386-2559682836-1000\Control Panel\International\Geo\Nation 2024-02-22_5fa791410973dc5a959b69f48c12ea82_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4688 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 2884 wrote to memory of 4688 2884 2024-02-22_5fa791410973dc5a959b69f48c12ea82_cryptolocker.exe 91 PID 2884 wrote to memory of 4688 2884 2024-02-22_5fa791410973dc5a959b69f48c12ea82_cryptolocker.exe 91 PID 2884 wrote to memory of 4688 2884 2024-02-22_5fa791410973dc5a959b69f48c12ea82_cryptolocker.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-22_5fa791410973dc5a959b69f48c12ea82_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5fa791410973dc5a959b69f48c12ea82_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2884 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:4688
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
47KB
MD5d8c4b33edb3821fa68a59b5d548af879
SHA18a1ab8d3f5a97c905273ddb301e8a6444a3af6dd
SHA2562e6e87ff3b06e208b92cde1f7f2c8f2f9a8ca3981dd5b251f3ed7510bc7eaacf
SHA512db19c317879642037fa696b634b2b8c8705761290fa29e562f5a5418e246ca98e0e64e7e32883814eec0756457b69e2f09f5aa0dbbdb7ff5583d2836ddbf55a5