In depth analysis of Lazarus validator

2020-05-15 • Malwarelab •

https://blog.malwarelab.pl/posts/lazarus_validator/

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MalwareLab analyzed a Lazarus-attributed validator from malicious Word documents impersonating Lockheed Martin and linked the samples to a broader campaign probably aimed at military contractors doing business with South Korea. The documents embedded two DLLs and an additional lure document so victims saw a fuller decoy rather than only a first page, reducing suspicion during execution. The validator used macro-supplied parameters, deleted the infection document path, established autostart persistence, and in some variants unpacked an intermediary DLL before contacting C2 for the next-stage payload. Its configuration used AES keys derived from an MD5 value, included the C2 URL https://www.astedams.it/include/inc-elenco-offerter.asp, collected drive information, and exchanged compressed and base64-encoded binary blobs before loading a received PE in memory. Attribution is explicitly tied to prior reporting that described the same infection scheme and DLL family, rather than independent attribution from the sample alone.

Indicators of Compromise

Type Value First Seen Last Seen
HASH a8647a04563b746b1d8d4cdd67616cb… 2020-05-15 2023-04-12
HASH 6590f66d6afe155b1109e81e2c36ece… 2020-05-15 2023-04-12
HASH 2627b7c827404ee49271bfc6bb152e5… 2020-05-15 2023-04-12
HASH d7ef8935437d61c975feb2bd826d018… 2020-05-15 2023-04-12
HASH 3c5c1a7e7efe4eee3b7650167c664f7… 2020-05-15 2023-04-12
HASH 21515fd6e6eb994defb589b4d0d9d95… 2020-05-15 2023-04-12
HASH 7fdfc719935d938651f45aafef3cd2e… 2020-05-15 2023-04-12
HASH 23d73fc8f10588944d8dc2073ce6af6… 2020-05-15 2023-04-12
HASH bb1b6865e62e6149ce7f849728fcbef… 2020-05-15 2023-04-12
HASH 454734dca530d54c4e8f543bdd33b5e… 2020-05-15 2023-04-12
HASH 66e5371c3da7dc9a80fb4c0fabfa23a… 2020-05-15 2023-04-12
HASH b76b6bbda8703fa801898f843692ec1… 2020-04-30 2023-04-12
HASH 48b8486979973656a15ca902b7bb973… 2020-04-30 2023-04-12
HASH 1b0c82e71a53300c969da61b085c8ce… 2020-04-30 2023-04-12
HASH 1076b25d5fa5cccdddcaf3f788789ae… 2020-04-30 2023-04-12
HASH bff4d04caeaf8472283906765df3442… 2020-04-30 2023-04-12
HASH 37a3c01bb5eaf7ecbcfbfde1aab8489… 2020-04-30 2023-04-12
HASH 1a172d92638e6fdb2858dcca7a78d4b… 2019-11-05 2023-04-12
HASH 26a2fa7b45a455c311fd57875d8231c… 2019-11-05 2023-04-12
HASH ec254c40abff00b104a949f07b7b642… 2019-11-05 2023-04-12
HASH 805183c19f4bffca871fb344247bd5d… 2020-05-15 2021-12-21
URL http://www.elite4print.com/admi… 2020-05-15 2020-07-29
URL https://www.sanlorenzoyacht.com… 2020-05-15 2020-07-29
URL https://www.astedams.it/uploads… 2020-05-08 2020-07-29
URL https://www.sanlorenzoyacht.com… 2020-04-30 2020-07-29
YARA apt_NK_Lazarus_DllImplat_cfg_de… 2020-05-15 2020-05-15
YARA apt_NK_Lazarus_DllImplat_cmd_li… 2020-05-15 2020-05-15
HASH d79bfa19e4d32692030d15c2767beb8… 2020-05-15 2020-05-15
HASH 0f0b242fb5d73d08b856bc43432b350… 2020-05-15 2020-05-15
HASH 7f39a52fc6a51b5dd3830064c63f9d4… 2020-05-15 2020-05-15
HASH 141931bf718c5c4d3931f64b04e2112… 2020-05-15 2020-05-15
HASH 7b5089c2bea3ec4aa98c5cdf69dac21… 2020-05-15 2020-05-15
HASH cb38822697af45210d2759889c2eb2b… 2020-05-15 2020-05-15
HASH 69e50a20ea6be94e4336ba8cea3c438… 2020-05-15 2020-05-15
HASH cf44576adcfc51a062457398797f99e… 2020-05-15 2020-05-15
HASH a769b39d0c80d1a035dd51efa28b092… 2020-05-15 2020-05-15
HASH f3e4947e32c6b1d0303b342a74426d4… 2020-05-15 2020-05-15
URL https://www.curiofirenze.com/ne… 2020-05-15 2020-05-15
URL http://www.astedams.it/include/… 2020-05-15 2020-05-15
URL https://www.astedams.it/uploads… 2020-05-08 2020-05-15

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