bcrypt.dll
Windows Cryptographic Primitives Library file version info
Library on Windows 2 known copies with hashes 1 Sigma rule names it
Is it the real bcrypt.dll?
Installed in
C:\Windows\system32\C:\Windows\SysWOW64\Signed byMicrosoft Windows
ProductMicrosoft Windows Operating System, Microsoft Corporation
DescriptionWindows Cryptographic Primitives Library
2 known copies
10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\bcrypt.dll · signed by Microsoft Windows
0b212c340c47a0f107dfcb87e8cfaca799b08bdae2b0ee0e07bb535fa3c29ff910.0.19041.1 (WinBuild.160101.0800) · C:\Windows\SysWOW64\bcrypt.dll · signed by Microsoft Windows
a99689ea6bd09c4bcdbbda868a2a233ad97266166e8059d117b0663a28c6ae07From the file’s version info and the copies recorded by xCyclopedia (MIT). A copy in another folder, signed by someone else or with another hash is not necessarily malicious, but it is worth a closer look. In Ceplin, "<sha256>".whatis() says which known copy a hash is.
What detects it
Sigma names bcrypt.dll in 1 rule, for every kind of event; none is a process creation rule CmdID evaluates, so none is listed.