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Written AppData file named in Windows executable-open command

A sandbox run recorded a file written to the current user’s AppData directory and a `.exe` open command that placed that same file before the program being launched. The match supports a configured launch intermediary, but the record does not show a later launch taking that route.

Oct 13, 2026, 15:19 (UTC+9)Last seenOct 13, 2026Severity96ByCTX TeamActorGamaredon GroupCTIGIOC22RegionsUS

A Windows executable wrote sidebar.exe beneath the current user’s AppData directory and changed the user’s .exe open command to point to that same file. The new command placed sidebar.exe /START before the executable being opened and its arguments. That raises a more consequential question than whether the sample contacted a suspicious address: was it positioning its own code in the path used to launch other programs? The CAPE Sandbox record supports that interpretation of the setting.

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Source: CTX Threat Intelligence