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Analysis
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max time kernel
148s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
15/04/2024, 20:30
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe
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Size
41KB
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MD5
20d8054dfbf8a6e5d3835ec9778f97d6
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SHA1
641852cef77f7b5959ec64238627b2fe08c12aba
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SHA256
44ab2ce8d7000ba457b5c7f4f63c9f807d3c3a5ed4f3ed6b298aba606095cd7b
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SHA512
3d4594611a451c5a8fb7fe9af817e9ee07f7d45b62ed1319de2579f945e613e01949dfff72f56ec360e2585a401004dc4bc6f9b2980c3ad554f2ba4ed88590f9
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SSDEEP
768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRY+iy4:m5nkFNMOtEvwDpjG8hhXy+iy4
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4764-0-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023272-13.dat CryptoLocker_rule2 behavioral2/memory/4764-19-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2760-26-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/4764-19-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 behavioral2/memory/2760-26-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/4764-0-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x0008000000023272-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/4764-19-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/2760-26-0x0000000000500000-0x000000000050E000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation 2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2760 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 4764 wrote to memory of 2760 4764 2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe 91 PID 4764 wrote to memory of 2760 4764 2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe 91 PID 4764 wrote to memory of 2760 4764 2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4764 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:2760
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4472 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:81⤵PID:864
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD512394b231f21b4aa7f0e4de73ca8cc5c
SHA19b40157c970cd54105a3b2d89a09456b891a6e2f
SHA256d3c83e4bc07a3030dedb6f70ee79c6b485073013e66e2c533d6b2ff75512c269
SHA512970da6e421868d516dd3c2a0afcdb66d3f75ae232bacf502d00c2f033864196cc27fd2348831bf239afebab7846d2230061c141d105fff3d377e83728ae792c2