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Threat Group Cards: A Threat Actor Encyclopedia

Tool: Skip-2.0

Names	Skip-2.0
Category	Malware
Type	Backdoor, Exfiltration
Description	(ESET) This backdoor targets MSSQL Server 11 and 12, allowing the attacker to connect stealthily to any MSSQL account by using a magic password – while automatically hiding these connections from the logs. Such a backdoor could allow an attacker to stealthily copy, modify or delete database content. This could be used, for example, to manipulate in-game currencies for financial gain. In-game currency database manipulations by Winnti operators have already been reported.
Information	<https://www.welivesecurity.com/2019/10/21/winnti-group-skip2-0-microsoft-sql-server-backdoor/>
Malpedia	<https://malpedia.caad.fkie.fraunhofer.de/details/win.skip20>

Last change to this tool card: 24 April 2021

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All groups using tool Skip-2.0

Changed	Name	Country	Observed
APT groups
	APT 41		2012-Jul 2025

1 group listed (1 APT, 0 other, 0 unknown)

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Electronic Transactions Development Agency

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