Attention: We have transitioned to a new AAD or Microsoft Entra ID from the week of May 20, 2024. In case your tenant requires admin consent, please refer to this document located at Overview of user and admin consent - Microsoft Entra ID | Microsoft Learn and grant access to App ID: 6ba09155-cb24-475b-b24f-b4e28fc74365 with graph permissions for Directory.Read.All and User.Read for continued access. While the app may appear unverified, you can confirm its legitimacy by verifying the App ID provided.
TrojanDownloader:Win32/Siromost.A creates the following files on your PC:
%windir%\temp\scse.tmp
%windir%\temp\scsf.tmp
<current folder>\8732.bat
<current folder>\nlbhost.dat
<current folder>\nlbhost.exe
c:\documents and settings\administrator\application data\microsoft\crypto\rsa\s-1-5-21-1844237615-2111687655-839522115-500\35e1583e1c692dff72d263b5602b7694_7f5ed85d-6828-4f92-858c-f40b0ac68138
c:\documents and settings\administrator\application data\microsoft\protect\s-1-5-21-1844237615-2111687655-839522115-500\5ffd5214-3508-4f62-94d9-daf64ae0271e
c:\documents and settings\administrator\application data\microsoft\protect\s-1-5-21-1844237615-2111687655-839522115-500\preferred
Payload
Contacts remote host
TrojanDownloader:Win32/Siromost.A might contact a remote host at thirdbase.bugs3.com using port 80. Commonly, malware does this to:
Report a new infection to its author
Receive configuration or other data
Download and run files, including updates or other malware
Receive instructions from a remote hacker
Upload data taken from your PC
This malware description was produced and published using automated analysis of file SHA1 265fdeb993a09d2350daa130de4ce5b662bed628.