APTMembers
APT

Dropped-file hash links outer installer to an executed inner installer

A file written as `update.exe` matches a separately analysed installer, and the outer file’s process tree shows that copy running beneath it. Matching temporary executable content strengthens the nested-installer finding, but a mining-pool lookup recorded for the outer file cannot be assigned to a component.

Oct 19, 2026, 18:16 (UTC+9)Last seenOct 19, 2026Severity72ByCTX TeamActorVoid ArachneSilver FoxIOC23RegionsBR

An executable running as setup.exe wrote update.exe into a Downloads directory and appeared as its parent in a sandbox process tree. The important detail was not the update-themed filename: the written file’s SHA-256 matched a second executable that had been analysed independently as an installer. Was this merely a bundle of similarly named files, or could the records show how one installer operated inside another? CTX Threat Intelligence’s records support the latter.

Members only

Members-only article

This story is members-only. Sign in to read the full body, indicators of compromise, and VirusTotal context.

Sign in to read
Source: CTX Threat Intelligence