Analysis
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max time kernel
30s -
max time network
151s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
28-02-2023 01:12
Static task
static1
Behavioral task
behavioral1
Sample
a3cd7a6ace2b75e39ea2a4ff5a3e4e27c840dc32606cd74990224814b2d3ac9d.dll
Resource
win7-20230220-en
windows7-x64
Behavioral task
behavioral2
Sample
a3cd7a6ace2b75e39ea2a4ff5a3e4e27c840dc32606cd74990224814b2d3ac9d.dll
Resource
win10v2004-20230220-en
windows10-2004-x64
General
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Target
a3cd7a6ace2b75e39ea2a4ff5a3e4e27c840dc32606cd74990224814b2d3ac9d.dll
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Size
108KB
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MD5
3632599571a4d48730d07a09343d1bde
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SHA1
83b1ede8c8f10b92d7296d375fb0612e0b080da3
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SHA256
a3cd7a6ace2b75e39ea2a4ff5a3e4e27c840dc32606cd74990224814b2d3ac9d
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SHA512
947e71dbdad185c469cd04d5e0f5c1429098e3fe861f9f158e42348a937f85cedfb0892c09457d70547bf5e27cf880c05e49bdd1f8f431df9db3280b5573f9e7
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SSDEEP
1536:Oh3MU/5bLDCMtm/ejs5x2WcHG82RqNoRKV2KoyqkvILnzZh/Qz6r:mt5bLDtm/ejs5xqHG82RWqWILzZRQO
Malware Config
Signatures
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FatalRat
FatalRat is a modular infostealer family written in C++ first appearing in June 2021.
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Fatal Rat payload 2 IoCs
resource yara_rule behavioral1/memory/1640-54-0x0000000000390000-0x00000000003DE000-memory.dmp fatalrat behavioral1/memory/1640-55-0x0000000000290000-0x00000000002B8000-memory.dmp fatalrat -
Blocklisted process makes network request 2 IoCs
flow pid Process 1 1640 rundll32.exe 2 1640 rundll32.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz rundll32.exe -
Suspicious behavior: EnumeratesProcesses 51 IoCs
pid Process 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe 1640 rundll32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1264 wrote to memory of 1640 1264 rundll32.exe 27 PID 1264 wrote to memory of 1640 1264 rundll32.exe 27 PID 1264 wrote to memory of 1640 1264 rundll32.exe 27 PID 1264 wrote to memory of 1640 1264 rundll32.exe 27 PID 1264 wrote to memory of 1640 1264 rundll32.exe 27 PID 1264 wrote to memory of 1640 1264 rundll32.exe 27 PID 1264 wrote to memory of 1640 1264 rundll32.exe 27
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\a3cd7a6ace2b75e39ea2a4ff5a3e4e27c840dc32606cd74990224814b2d3ac9d.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1264 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\a3cd7a6ace2b75e39ea2a4ff5a3e4e27c840dc32606cd74990224814b2d3ac9d.dll,#12⤵
- Blocklisted process makes network request
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1640
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