Analysis
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max time kernel
17s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
12-02-2024 19:57
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe
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Size
40KB
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MD5
4b68ecab026c808b7b5336afa90fd5dd
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SHA1
d792149cb5acdb82ffaa9b98037f59034dcf8a8e
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SHA256
6dca2b7a8043247095ac7d05b4d8ba65defba73ff9939f0f1a54685dbcdca96d
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SHA512
4723b1212ea17f4110b5200b41f15862113561b94a2d01f5121badbfbd07e2f02bb65e6a3964998461cdd690247924e6bd811dd269e20ff5c431d514ad608fda
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SSDEEP
768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAA:b/pYayGig5HjS3NPAA
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule \Users\Admin\AppData\Local\Temp\retln.exe CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
Processes:
retln.exepid process 3024 retln.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exepid process 2868 2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_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
Processes:
2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exeretln.exepid process 2868 2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe 3024 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exedescription pid process target process PID 2868 wrote to memory of 3024 2868 2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe retln.exe PID 2868 wrote to memory of 3024 2868 2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe retln.exe PID 2868 wrote to memory of 3024 2868 2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe retln.exe PID 2868 wrote to memory of 3024 2868 2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe retln.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
- Suspicious use of UnmapMainImage
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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\Users\Admin\AppData\Local\Temp\retln.exeFilesize
41KB
MD55b9869c1e89ac2966443163456f48e12
SHA142aa8649fcfa09a74722c8f725e404bae837cfe0
SHA256160bad443607b4035a6394ae141e49b0f241dd21e32da913bca2400ee3f83aa7
SHA512bbc158182cfd7892d8abd018498b050393b29987f4d147710877f0ca8796567d4004bf6c16f8a6e6360766b1675d61267013d2cc2896dff2796644a4c8ec9ee7
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memory/2868-0-0x0000000000210000-0x0000000000216000-memory.dmpFilesize
24KB
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memory/2868-1-0x0000000000400000-0x0000000000406000-memory.dmpFilesize
24KB
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memory/2868-8-0x0000000000210000-0x0000000000216000-memory.dmpFilesize
24KB
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memory/3024-23-0x00000000003F0000-0x00000000003F6000-memory.dmpFilesize
24KB