Analysis
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max time kernel
11s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
22/02/2024, 20:34
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe
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Size
34KB
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MD5
648afc78acd72a9f26786ee7d2ef7d90
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SHA1
265d7b81adab55a10fbe84ca4b5204fb422b0db5
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SHA256
1f838f808e67b4fe8c69f97fe489e7f86589a7c3b83a03e41e7f4e8c434d9568
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SHA512
3677a873be39d31313c85d3f74aa4af6a765b603a5b84a6b8f915791fcf3338fc82131464842ee985f8a7fe29987edde70e6bfd7bd0fd9b2ce159c5b13b4561c
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SSDEEP
768:b/yC4GyNM01GuQMNXw2PSjHC02ltAUACh:b/pYayGig5HC02gbCh
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral1/files/0x000b00000001224c-10.dat CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
pid Process 2516 retln.exe -
Loads dropped DLL 1 IoCs
pid Process 3012 2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe -
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of UnmapMainImage 2 IoCs
pid Process 3012 2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe 2516 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 3012 wrote to memory of 2516 3012 2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe 28 PID 3012 wrote to memory of 2516 3012 2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe 28 PID 3012 wrote to memory of 2516 3012 2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe 28 PID 3012 wrote to memory of 2516 3012 2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3012 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
- Suspicious use of UnmapMainImage
PID:2516
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
35KB
MD5dc40b9379c679d7eec20377b36552225
SHA16aee4f7f4a684bd36aee4d0a4b1b7ab6f5deaf1c
SHA2569c9bde0b9a8ed77071d7ccb7bfcd5381c9b5b74f3833db78b34b612079a4e164
SHA512444842ab4a9320a50a66b7d6f7db7ad1a4ccdee9d6600148ab3b5c4764bf0ff52b239ee7f79dd87dce71b0b450431ced12b3b7860d651814fdbd929e828cbb94