Cyber Security

Black Friday special by Emotet: Filling inboxes with infected XML macros

Emotet starts another massive spam campaign just as Black Friday begins to pick up steam

ESET has detected another large Emotet campaign, probably connected with the increased online shopping and email correspondence around Black Friday. Compared to the previous attacks, the operators have slightly modified their modus operandi. Emotet is still being distributed via spam emails containing attachments with malicious macros or links to such files. Around Black Friday, however, the attachments and links have been serving XML files with .doc extension instead of the previously observed DOC and PDF files.

As to the secondary payloads, Emotet is currently distributing various banking malware families, including Ursnif, TrickBot and most frequently IcedId. The latter also downloads another payload, Azorult (ESET detects this malware as Win32/PSW.Delf.OSF), known for its ability to steal passwords, credit card details and access to cryptocurrency wallets. TrickBot, on the other hand, has upped its game by adding multiple UK and German banks to the list of its targets. This corresponds with German and English subject lines of the spam emails and their contents that ESET described in its latest blog about Emotet.

Looking at the geographical distribution, Latin American (LATAM) countries seem to be amongst the most affected – with Mexico, Ecuador and Argentina leading the list (with hundreds of thousands of detections). The United States are in the top five targeted countries, while the UK and South Africa have also made the top ten.

Indicators of Compromise (IoCs)

Emotet payloads

02b614654f27b67aa3efcf94dcad3875696315ab TrickBot
cda88d48c26afd383a996fe2c0ef87514389c189 IcedId
0977692f1accd541dd7c23eb76f5272d4321d868 IcedId
3b000e5e6de4d91443563792d69caac95b1038f0 TrickBot
086bc2718521e6e4aead498b57d20d3b2ec812e9 Ursnif
202604e7dc6c29ae75ad9f707ebbc8bf5367a631 TrickBot
844e6a4c31ae473702781603d8cdd5f9b3aa63c5 IcedId
6481172f509f80ee059b7dc20a2bf995b38aafd2 TrickBot
9e8972dd0130481e1e42504c7fdda1ffa353e473 IcedId
db82d173e5afe207eeebacb65bd76cdbb67b5955 TrickBot
350e6b2f5728a17578923ab5a7640e0b57101447 IcedId
638d2c5b3331cdc2267d1036a9ff8e2efd08b316 IcedId
3c3624bfd75285c0d69f4867cc2adc5fb538888f IcedId
f75e600d29189065208d116602a2a6fccebf1927 IcedId
e38d371e17eeb34b6f94d05a208d0eb8a3b88f37 IcedId
765c272f914e85332d6e6a16e62645764f417379 TrickBot
ea24d6f25077f8a82c5a09e0b22040293b8a50d6 IcedId
d5d1c5c1af7c4e0346367cc1fdef0e788f25f1a6 IcedId

PSW.Delf.OSF – AZORult

3e435f2d58616e28972ad2c422f54e27680fb452 Win32/GenKryptik.CRSJ trojan
f17a455dc012027486ad39c134984cadbe7e31ef Win32/Kryptik.GMUX trojan

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