Threat Level: green Handler on Duty: Xavier Mertens

SANS ISC: InfoSec Handlers Diary Blog InfoSec Handlers Diary Blog


Sign Up for Free!   Forgot Password?
Log In or Sign Up for Free!

An example of malspam pushing Lokibot malware, November 2019

Published: 2019-11-13
Last Updated: 2019-11-13 01:11:37 UTC
by Brad Duncan (Version: 1)
0 comment(s)

Introduction

I posted two diaries last year (2018) about Lokibot malware (sometimes spelled "Loki-bot").  One was in June 2018 and one was in December 2018.  It's been a while, so I wanted to share a recent example that came to my blog's admin email on Tuesday 2019-11-12.

The email

You can get a copy of the sanitized email from this Any.Run link.


Shown above:  A copy of the email opened in Thunderbird.

The attachment was a RAR archive (link) and the RAR archive contained a Windows executable file disguised as a PDF document (link).


Shown above:  The attached RAR archive and the extracted Windows executable file.

The infection traffic

Infection traffic is easily detectable by signatures from the EmergingThreats Open ruleset.


Shown above:  Traffic from an infection filtered in Wireshark.


Shown above:  TCP stream from one of the HTTP requests caused by my sample of Lokibot malware.


Shown above:  EmergingThreats alerts from an Any.Run sandbox analysis of the Windows executable file.

Post-infection forensics on an infected Windows host

I was able to infect a Windows 10 host in my lab environment, and Lokibot made itself persistent through the Windows registry.


Shown above:  Lokibot on an infected Windows host.


Shown above:  Windows registry update caused by Lokibot to stay persistent.

Final words

SHA256 hash of the email:

SHA256 hash of the attached RAR archive:

SHA256 hash of the extracted Windows executable file (Lokibot malware):

--
Brad Duncan
brad [at] malware-traffic-analysis.net

Keywords: exe lokibot malspam
0 comment(s)
Diary Archives