SYMBOLCOMMON_NAMEaka. SYNONYMS
win.boostwrite (Back to overview)

BOOSTWRITE

Actor(s): Anunak

FireEye describes BOOSTWRITE as a loader crafted to be launched via abuse of the DLL search order of applications which load the legitimate ‘Dwrite.dll’ provided by the Microsoft DirectX Typography Services. The application loads the ‘gdi’ library, which loads the ‘gdiplus’ library, which ultimately loads ‘Dwrite’. Mandiant identified instances where BOOSTWRITE was placed on the file system alongside the RDFClient binary to force the application to import DWriteCreateFactory from it rather than the legitimate DWrite.dll.

References
2022-04-27 ⋅ ⋅ ANSSI ⋅ ANSSI
LE GROUPE CYBERCRIMINEL FIN7
Bateleur BELLHOP Griffon SQLRat POWERSOURCE Andromeda BABYMETAL BlackCat BlackMatter BOOSTWRITE Carbanak Cobalt Strike DNSMessenger Dridex DRIFTPIN Gameover P2P MimiKatz Murofet Qadars Ranbyus SocksBot
2020-02-13 ⋅ Qianxin ⋅ Qi Anxin Threat Intelligence Center
APT Report 2019
Chrysaor Exodus Dacls VPNFilter DNSRat Griffon KopiLuwak More_eggs SQLRat AppleJeus BONDUPDATER Agent.BTZ Anchor AndroMut AppleJeus BOOSTWRITE Brambul Carbanak Cobalt Strike Dacls DistTrack DNSpionage Dtrack ELECTRICFISH FlawedAmmyy FlawedGrace Get2 Grateful POS HOPLIGHT Imminent Monitor RAT jason Joanap KerrDown KEYMARBLE Lambert LightNeuron LoJax MiniDuke PolyglotDuke PowerRatankba Rising Sun SDBbot ServHelper Snatch Stuxnet TinyMet tRat TrickBot Volgmer X-Agent Zebrocy
2019-10-10 ⋅ FireEye ⋅ Jeremy Kennelly, Jordan Nuce, Josh Yoder, Kimberly Goody, Nick Carr, Scott Runnels
Mahalo FIN7: Responding to the Criminal Operators’ New Tools and Techniques
BOOSTWRITE
Yara Rules
[TLP:WHITE] win_boostwrite_w0 (20191012 | No description)
rule win_boostwrite_w0 {
    meta:
        author = "Nick Carr (@itsreallynick)"
        reference = "https://www.fireeye.com/blog/threat-research/2019/08/definitive-dossier-of-devilish-debug-details-part-one-pdb-paths-malware.html"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.boostwrite"
        malpedia_version = "20191012"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    strings:
        $weetPDB = /RSDS[\x00-\xFF]{20}[a-zA-Z]?:?\\[\\\s|*\s]?.{0,250}\\DWriteImpl[\\\s|*\s]?.{0,250}\.pdb\x00/ nocase

    condition:
        (uint16(0) == 0x5A4D) and uint32(uint32(0x3C)) == 0x00004550 and $weetPDB and filesize < 6MB
}
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