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Analysis
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max time kernel
147s -
max time network
151s -
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, 11:24
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-28_003bfa6663ccb47b6fc9ec49675f5b95_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-28_003bfa6663ccb47b6fc9ec49675f5b95_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-02-28_003bfa6663ccb47b6fc9ec49675f5b95_cryptolocker.exe
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Size
40KB
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MD5
003bfa6663ccb47b6fc9ec49675f5b95
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SHA1
85cbc3048845686eb3892dbff9710656fe22518f
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SHA256
d3f04128bef536c4bcf89a0d728e97435fe0305fb854b048fbe825702fd989e0
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SHA512
60e56b975c21e2537393a937e305963c73ed2c072e99bdaeeb69c2d7e2740437a229b7466d02d4645590999323641f34384382062b45ccf72d10b9c608fe57e1
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SSDEEP
768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvgpnHG:m5nkFNMOtEvwDpjG8hgpHG
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1072-0-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002320a-13.dat CryptoLocker_rule2 behavioral2/memory/1072-17-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3172-51-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/1072-17-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 behavioral2/memory/3172-51-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/1072-0-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x000700000002320a-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/1072-17-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3172-51-0x0000000000500000-0x000000000050E000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation 2024-02-28_003bfa6663ccb47b6fc9ec49675f5b95_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation misid.exe -
Executes dropped EXE 1 IoCs
pid Process 3172 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 1072 wrote to memory of 3172 1072 2024-02-28_003bfa6663ccb47b6fc9ec49675f5b95_cryptolocker.exe 88 PID 1072 wrote to memory of 3172 1072 2024-02-28_003bfa6663ccb47b6fc9ec49675f5b95_cryptolocker.exe 88 PID 1072 wrote to memory of 3172 1072 2024-02-28_003bfa6663ccb47b6fc9ec49675f5b95_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-28_003bfa6663ccb47b6fc9ec49675f5b95_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-28_003bfa6663ccb47b6fc9ec49675f5b95_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1072 -
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:3172
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD53a1b6f1ce7f4848ae942c708b3ba8354
SHA15e22a2ba18ea10fca2593844b15b51c8e309a4f9
SHA256591fea75b95d936724dc41a775e4bbb6af9b20c1d003355b0f841eef88c3e5f2
SHA512b484fb69e8035e33363bb4ef538d4012fd148c838b0ce4d1f53cfdd569a5774c7fef1b05c062d5b5b254331c8769ae242f3ef89c4a885fe3e8912d26d4fb86f1