Analysis
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max time kernel
14s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
28/05/2024, 00:55
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe
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Size
31KB
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MD5
b8741809ef30f0c5fdbc8067af86518f
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SHA1
333e066fa0930b0564bf53db5b2b57662b86fab0
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SHA256
58bb3931e32bd0e05923489f47755c4f4e8c4ae2ca3f0b64aa4699508292e340
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SHA512
0eb1b7e558a9d314d9837346b840b8b484033e3aaa7b8764ad74115dfc6320b291b10096e22d5fde44dd5e7697d786b445d974722e041029170835b2c50b4d09
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+U8Ss87vh4:b/yC4GyNM01GuQMNXum+NSn4
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral1/files/0x000e000000012122-10.dat CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
pid Process 1808 retln.exe -
Loads dropped DLL 1 IoCs
pid Process 848 2024-05-28_b8741809ef30f0c5fdbc8067af86518f_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 848 2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe 1808 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 848 wrote to memory of 1808 848 2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe 28 PID 848 wrote to memory of 1808 848 2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe 28 PID 848 wrote to memory of 1808 848 2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe 28 PID 848 wrote to memory of 1808 848 2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-28_b8741809ef30f0c5fdbc8067af86518f_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:848 -
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:1808
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
31KB
MD518cdfca6b82c63cebf7c44f4367161de
SHA11ca476fcd4906d095a7ecdf8eeb2a1e2f6f9ef54
SHA25681f92df47c58da83cc3e7a2132d8910a5ee4a07837e992d63481625723f7c813
SHA512ce63abee689bfd6b4c49f5aa8dc31ea97d0be95afdea08e94541225ea35d4c3619f0bd43c82ae8611158e6fd60430f0aa16106951d6edf5132ada9568870a2df