Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
23/02/2024, 20:05
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-23_cf17aaaf33ee6e45e0b9a16bd8e753d3_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-23_cf17aaaf33ee6e45e0b9a16bd8e753d3_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-23_cf17aaaf33ee6e45e0b9a16bd8e753d3_cryptolocker.exe
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Size
46KB
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MD5
cf17aaaf33ee6e45e0b9a16bd8e753d3
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SHA1
3ca5f335d3e89703294874c7f066d34857988646
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SHA256
63305d803d37417f2c31d8aeddf43883bbe4f9ceab1b6f6f9e693682208c8065
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SHA512
4f03c16c87b8f5791e39482a7c1f580965fd51be0d614cfa3ca8f949ed9608b107098ab9b71dcb3061bca9f9b5173de36dbd4a0c5c93ef260945835d20de210a
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SSDEEP
768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLtldtS:xj+VGMOtEvwDpjk/tS
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/5100-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00c300000001e848-13.dat CryptoLocker_rule2 behavioral2/memory/5100-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1996-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/5100-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00c300000001e848-13.dat CryptoLocker_set1 behavioral2/memory/5100-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1996-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/5100-0-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x00c300000001e848-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/5100-17-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/1996-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation 2024-02-23_cf17aaaf33ee6e45e0b9a16bd8e753d3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1996 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 5100 wrote to memory of 1996 5100 2024-02-23_cf17aaaf33ee6e45e0b9a16bd8e753d3_cryptolocker.exe 89 PID 5100 wrote to memory of 1996 5100 2024-02-23_cf17aaaf33ee6e45e0b9a16bd8e753d3_cryptolocker.exe 89 PID 5100 wrote to memory of 1996 5100 2024-02-23_cf17aaaf33ee6e45e0b9a16bd8e753d3_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-23_cf17aaaf33ee6e45e0b9a16bd8e753d3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-23_cf17aaaf33ee6e45e0b9a16bd8e753d3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5100 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:1996
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
47KB
MD564c62c3dcd1cb3e7bf54c2f6290a6e96
SHA1527c4fef09dbf5f13d3ffc2a53e1b2b49fec60e4
SHA25634fcbd84a1c5c8791b2e00676eed6c774e1e827383f1bc4a27d361a9f2d69107
SHA512e3112f2fa12c197d924204ef10ca01b198c07c962aacf803ddf70d3395d43c9a967715eadd1a6ec36c3017620bc62dcc316207ab2fa79ac7b1d8a6f4139e57bf