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Analysis
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max time kernel
164s -
max time network
171s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
26/12/2023, 13:00
Static task
static1
Behavioral task
behavioral1
Sample
707aab5b6a36b0841bca699a86e2cba4.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
707aab5b6a36b0841bca699a86e2cba4.exe
Resource
win10v2004-20231215-en
General
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Target
707aab5b6a36b0841bca699a86e2cba4.exe
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Size
65KB
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MD5
707aab5b6a36b0841bca699a86e2cba4
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SHA1
8bb8138c41da32e322964ab989ce1243d54c3326
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SHA256
e17500cb8fe610d75e8f4f8ded49aedb5efe458eeb5a8bce8d0839669fdc47f1
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SHA512
5ab63023a7deaa7d72e66165e8b7cfb8d7986935f278d48f86121436b932a22dfdca0912e0bbf78faba20a1c159a449e88da96c05c9e86aec5447dee0c6a41aa
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SSDEEP
1536:NOzLhppHB+klvIh31t/YETNMrvPhO3V8sCerjRIW8B49YedI7Kcs:kfh1otAgMrXhOcWjqW8BCYeKG7
Malware Config
Signatures
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Sets DLL path for service in the registry 2 TTPs 3 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\vrdnxg\Parameters\ServiceDll = "%SystemRoot%\\System32\\cuyrrn.dll" 707aab5b6a36b0841bca699a86e2cba4.exe Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet002\Services\vrdnxg\Parameters\ServiceDll = "%SystemRoot%\\System32\\cuyrrn.dll" 707aab5b6a36b0841bca699a86e2cba4.exe Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet003\Services\vrdnxg\Parameters\ServiceDll = "%SystemRoot%\\System32\\cuyrrn.dll" 707aab5b6a36b0841bca699a86e2cba4.exe -
Deletes itself 1 IoCs
pid Process 2776 svchost.exe -
Loads dropped DLL 2 IoCs
pid Process 1940 707aab5b6a36b0841bca699a86e2cba4.exe 2776 svchost.exe -
Drops file in System32 directory 2 IoCs
description ioc Process File created C:\Windows\SysWOW64\cuyrrn.dll 707aab5b6a36b0841bca699a86e2cba4.exe File created C:\Windows\SysWOW64\000527b4.sys 707aab5b6a36b0841bca699a86e2cba4.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\707aab5b6a36b0841bca699a86e2cba4.exe"C:\Users\Admin\AppData\Local\Temp\707aab5b6a36b0841bca699a86e2cba4.exe"1⤵
- Sets DLL path for service in the registry
- Loads dropped DLL
- Drops file in System32 directory
PID:1940
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C:\Windows\SysWOW64\svchost.exeC:\Windows\SysWOW64\svchost.exe -k vrdnxg1⤵
- Deletes itself
- Loads dropped DLL
PID:2776
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
58KB
MD558a442b1e3d70ddbd24d3ad769d2c900
SHA140d4f93d67c82ae6faf4567b3032c862bf94f56a
SHA25656410a502dbc15bdc6a57a6b7add3d019a992fc1eead72733c31734130f5f1c4
SHA512241f01bb8342ca135f9c4c30c54996bf21ad9dadf6ce63e57e7eaa4cdcf92b53ed59feecc5ba6d349faea236622b2ae1dba078e6c4f1d8d739a6a128c79fc2e5