Hwp malicious code disguised as Korea's Financial Supervisory Service

2018-08-07 • kino •

http://sfkino.tistory.com/64

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A malicious HWP document disguised as a Korea Financial Supervisory Service notice used encrypted shellcode similar to a previously observed HWP sample. The excerpt notes 16-byte XOR keys, extraction of PostScript code and shellcode, and a malware-structure signature value of 0xAABBCCDD followed by a download URL. The domain tpddata.com is described as recurring across recently released HWP samples, and the body lists related HWP filenames, hashes, and compromised-looking PHP paths. The evidence is useful for defenders tracking Korean-language HWP lure documents and validating the listed hashes, domains, and URLs in endpoint and network telemetry.

Indicators of Compromise

Type Value First Seen Last Seen
HASH c2f150dbe9a8efb72dc46416ca29acd… 2018-06-22 2020-06-23
HASH 3ff4ebae6c255d4ae6b747a77f2821f… 2018-06-22 2020-05-12
HASH 4a17324aa55f5353ecd38f34e06e246… 2018-06-22 2019-07-03
HASH e498630abe9a91485ba42698a35c2a0… 2018-06-22 2019-07-03
DOMAIN tpddata.com 2018-06-22 2018-09-24
HASH c9582680978fde80593f2bc164f9ac6f 2018-08-07 2018-08-07
HASH 566f7b3f6af8d0b00593f3a83cd8af16 2018-08-07 2018-08-07
HASH 9c3221dfc49b159f032eda70e8cb207… 2018-06-22 2018-08-07
HASH a9d579819370e860ece7890c3490cde… 2018-06-22 2018-08-07
HASH 485f77e5d32de5dc05510743025a75a… 2018-06-22 2018-08-07
HASH 596fbdf01557c3ec89b345c57ae5d9a… 2018-06-22 2018-08-07

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