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Analysis
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max time kernel
147s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
28/02/2024, 02:38
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-28_5798129b90867e8beb3fd7f908119045_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-02-28_5798129b90867e8beb3fd7f908119045_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-02-28_5798129b90867e8beb3fd7f908119045_cryptolocker.exe
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Size
40KB
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MD5
5798129b90867e8beb3fd7f908119045
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SHA1
2a9cfce4c4685a7ffed148a18e008779cbc35697
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SHA256
4b52d1e7bc56361d89ca1519cd507c0fd0dc9c3d5325e373c2a460f4e53241b7
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SHA512
1ca113366975c33b55090bdaa980ab4fdb2efa5fa8b592d2c436290e35da1fd64fdc5783e66f6bb33046fa8845bf2e15f357702f76adbf933d2faf10e46fa5e9
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SSDEEP
768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvgpnISct/:m5nkFNMOtEvwDpjG8hgp+
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4300-0-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002321f-13.dat CryptoLocker_rule2 behavioral2/memory/4300-18-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2044-52-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/4300-18-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 behavioral2/memory/2044-52-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/4300-0-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x000800000002321f-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/4300-18-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/2044-52-0x0000000000500000-0x000000000050E000-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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation 2024-02-28_5798129b90867e8beb3fd7f908119045_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation misid.exe -
Executes dropped EXE 1 IoCs
pid Process 2044 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 4300 wrote to memory of 2044 4300 2024-02-28_5798129b90867e8beb3fd7f908119045_cryptolocker.exe 89 PID 4300 wrote to memory of 2044 4300 2024-02-28_5798129b90867e8beb3fd7f908119045_cryptolocker.exe 89 PID 4300 wrote to memory of 2044 4300 2024-02-28_5798129b90867e8beb3fd7f908119045_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-28_5798129b90867e8beb3fd7f908119045_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-28_5798129b90867e8beb3fd7f908119045_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4300 -
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:2044
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD55b81806536420e4086e37a9cadc6bfd2
SHA1d0e865dfc97731bc4bc5ce37e909c96cca0b97e1
SHA2567547b7667a67bbea5a55cc585f15cd519596fc201816f8f16129980f13c281ff
SHA5125078d918b4b18ed3c04bbc62950a01ed31b3539f607c90c9005dd83fdf841e42e01d521c36d723763631baf0bd80e77a6d910fbed043d5e98633ac516a03ed3f