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Analysis
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max time kernel
148s -
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
29/02/2024, 05:04
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-29_7e3800716ea57831b5b3104b6bd9a95e_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-29_7e3800716ea57831b5b3104b6bd9a95e_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-02-29_7e3800716ea57831b5b3104b6bd9a95e_cryptolocker.exe
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Size
103KB
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MD5
7e3800716ea57831b5b3104b6bd9a95e
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SHA1
d25a5dbf5caf2eb33575defdf1abbbcb10247b86
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SHA256
bff101067278aa9b061578ed55166ac550a48398a6799e663342f1866001b5ab
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SHA512
4a99d6f2f1507c8871630a7ff5ba818d1637cad5e0dea06e0d31b5cb5032f5356d96b3856a7b34652b17330a56ebedd660387ff6b88ba6a81bf01f299c7bed33
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SSDEEP
1536:V6QFElP6n+gMQMOtEvwDpjQGYQbN/PKwNgpwqWsvikFI:V6a+pOtEvwDpjtzb
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000700000001ebc7-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000700000001ebc7-12.dat CryptoLocker_set1 -
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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation 2024-02-29_7e3800716ea57831b5b3104b6bd9a95e_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4792 asih.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 1224 wrote to memory of 4792 1224 2024-02-29_7e3800716ea57831b5b3104b6bd9a95e_cryptolocker.exe 89 PID 1224 wrote to memory of 4792 1224 2024-02-29_7e3800716ea57831b5b3104b6bd9a95e_cryptolocker.exe 89 PID 1224 wrote to memory of 4792 1224 2024-02-29_7e3800716ea57831b5b3104b6bd9a95e_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-29_7e3800716ea57831b5b3104b6bd9a95e_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-29_7e3800716ea57831b5b3104b6bd9a95e_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1224 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4792
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
103KB
MD5186697d5749bcc0e239e03bbd6b56914
SHA17cc21d46c2a04292a41b05e3c3393daf1d2dedf5
SHA256c140cc5fe588e1be34ce798af44d07dca67410093529d3e1c0a3e01bb4041211
SHA512c1292d337f95b54d67d28be58a4b94d37740fbda113f6ec69a72d319e31d7cd06c9f58edcc51ede9b86a63dda82ab647a0fe02466f07497aff663220bfd0cf25