Analysis
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max time kernel
135s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
01/02/2024, 13:34
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-01_c88cbe41bdb13d323f4de766e6960583_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-01_c88cbe41bdb13d323f4de766e6960583_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-01_c88cbe41bdb13d323f4de766e6960583_cryptolocker.exe
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Size
94KB
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MD5
c88cbe41bdb13d323f4de766e6960583
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SHA1
0ce178f63fd50a9a9b6785774d5b1162cce6a67f
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SHA256
28de5650e01c9d13d2e346141daec022dd9ba4302b59318ffaf84b7437b5678c
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SHA512
c4dc2c49d5cfb6687df89ef0bffdf404d01cddfc09e07e66550bb1575859ef1960204f5c892b6d705cb25da42e5acc15500c35717276f39fc248e60e584c55cd
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SSDEEP
768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJHlv/R:xj+VGMOtEvwDpjubwQEIiVmkxv/R
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4852-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023123-13.dat CryptoLocker_rule2 behavioral2/memory/4852-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4536-54-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/4852-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0007000000023123-13.dat CryptoLocker_set1 behavioral2/memory/4852-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4536-54-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/4852-0-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x0007000000023123-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/4852-17-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/4536-54-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress -
Checks computer location settings 2 TTPs 2 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 2024-02-01_c88cbe41bdb13d323f4de766e6960583_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation misid.exe -
Executes dropped EXE 1 IoCs
pid Process 4536 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 4852 wrote to memory of 4536 4852 2024-02-01_c88cbe41bdb13d323f4de766e6960583_cryptolocker.exe 83 PID 4852 wrote to memory of 4536 4852 2024-02-01_c88cbe41bdb13d323f4de766e6960583_cryptolocker.exe 83 PID 4852 wrote to memory of 4536 4852 2024-02-01_c88cbe41bdb13d323f4de766e6960583_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-01_c88cbe41bdb13d323f4de766e6960583_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-01_c88cbe41bdb13d323f4de766e6960583_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4852 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:4536
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
94KB
MD5125cc2d2323ca7958c79cd51938db94c
SHA1223bee1ed18586900f91b5edc7e3279cdd50b636
SHA2562ff1318da7555f9650b3b5c26b2c61adc17c3a4b81df398a01bd22fac2fd4345
SHA51294f4e295a6ba5ed07c613729205213b6001e63291faefe9d09a61def0d2b99b32a58a1e4235ceca99a70fee683ac3d64496f0096c37aca4b5fd5660a5231327e