Threat Group Cards: A Threat Actor Encyclopedia
Archived: 2026-04-06 03:21:23 UTC
Home > List all groups > List all tools > List all groups using tool SkinnyBoy
 Tool: SkinnyBoy
Names SkinnyBoy
Category Malware
Type Backdoor, Info stealer
Description
(Cluster25) The vector of the infection is a spear phishing email delivering a Word Office
document with a significant name related to an International Conference. Both the vector and
its naming are consistent with APT28 / FancyBear TTPs.As expected, the document triggers a
MACRO function able to extract a Microsoft Dynamic Link Library (DLL) which then acts as
downloader of a SkinnyBoy dropper (tdp1.exe) from a first dropurl.
Information
Malpedia Last change to this tool card: 28 December 2021
Download this tool card in JSON format
All groups using tool SkinnyBoy
Changed Name Country Observed
APT groups
 Sofacy, APT 28, Fancy Bear, Sednit 2004-Apr 2025
1 group listed (1 APT, 0 other, 0 unknown)
Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=7c800792-38a5-4583-88f1-2ee873960680
https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=7c800792-38a5-4583-88f1-2ee873960680
Page 1 of 1