Researchers observed increased activity from the “FICORA” and “CAPSAICIN” variants, which exploit vulnerabilities in outdated D-Link routers like DIR-645, DIR-806, GO-RT-AC750, and DIR-845L.
Attackers use the HNAP protocol to execute commands on unpatched devices, stressing the need for timely updates and strong security.
They used servers in the Netherlands to activate the “FICORA” botnet, affecting many countries and showing the attack was widespread.
The “CAPSAICIN” botnet conducted a concentrated campaign targeting East Asian countries, with heightened activity observed over two days, October 21 and 22, 2024. This indicates a more deliberate and geographically focused approach compared to other botnets.
The FICORA botnet, a Linux-based variant of the Mirai malware, is designed to spread effectively by downloading and executing its payload through multiple methods, including wget, ftpget, curl, and tftp. These techniques allow it to exploit vulnerabilities across a wide range of devices.
Before downloading versions tailored for different Linux architectures, the FICORA malware terminates processes with the same file extension.
It uses ChaCha20 encryption to store its configuration, including the C2 server domain and a unique identifier.
The malware also contains a hard-coded username-password list for brute-force attacks and a shell script to detect and terminate processes with the keyword “dvrHelper.”
The CAPSAICIN malware, downloaded from a malicious server, targets multiple Linux architectures by connecting to its C2 server and transmitting victim host details.
It terminates competing botnet processes, configures environment variables, and executes DDoS attacks based on C2 commands, indicating it is likely a variant developed by the Keksec group.
FortiGuard Labs found that the “FICORA” and “CAPSAICIN” malware exploit a decade-old patched kernel vulnerability, showing the ongoing risk of unpatched systems.
Despite the vulnerability’s age, these attacks are still widespread, highlighting the need for regular kernel updates on all enterprise devices.
Effective monitoring systems are also crucial for detecting and preventing malware exploiting this and other vulnerabilities.
By adopting these security measures, businesses can reduce their risk from this persistent threat.
IOCs
URLs
FICORA
hxxp://103[.]149[.]87[.]69/multi
hxxp://103[.]149[.]87[.]69/la.bot.arc
hxxp://103[.]149[.]87[.]69/la.bot.arm
hxxp://103[.]149[.]87[.]69/la.bot.arm5
hxxp://103[.]149[.]87[.]69/la.bot.arm6
hxxp://103[.]149[.]87[.]69/la.bot.arm7
hxxp://103[.]149[.]87[.]69/la.bot.m68k
hxxp://103[.]149[.]87[.]69/la.bot.mips
hxxp://103[.]149[.]87[.]69/la.bot.mipsel
hxxp://103[.]149[.]87[.]69/la.bot.powerpc
hxxp://103[.]149[.]87[.]69/la.bot.sh4
hxxp://103[.]149[.]87[.]69/la.bot.sparc
CAPSAICIN
hxxp://87[.]11[.]174[.]141/bins.sh
hxxp://pirati[.]abuser[.]eu/yakuza.yak.sh
hxxp://pirati[.]abuser[.]eu/yakuza.arm5
hxxp://pirati[.]abuser[.]eu/yakuza.arm6
hxxp://pirati[.]abuser[.]eu/yakuza.arm7
hxxp://pirati[.]abuser[.]eu/yakuza.i586
hxxp://pirati[.]abuser[.]eu/yakuza.i686
hxxp://pirati[.]abuser[.]eu/yakuza.m68k
hxxp://pirati[.]abuser[.]eu/yakuza.mips
hxxp://pirati[.]abuser[.]eu/yakuza.mipsel
hxxp://pirati[.]abuser[.]eu/yakuza.ppc
hxxp://pirati[.]abuser[.]eu/yakuza.sparc
hxxp://pirati[.]abuser[.]eu/yakuza.x86
hxxp://87[.]10[.]220[.]221/bins.sh
hxxp://87[.]10[.]220[.]221/yakuza.sh
hxxp://87[.]10[.]220[.]221/yakuza.arm4
hxxp://87[.]10[.]220[.]221/yakuza.arm5
hxxp://87[.]10[.]220[.]221/yakuza.arm6
hxxp://87[.]10[.]220[.]221/yakuza.arm7
hxxp://87[.]10[.]220[.]221/yakuza.i586
hxxp://87[.]10[.]220[.]221/yakuza.i686
hxxp://87[.]10[.]220[.]221/yakuza.m68k
hxxp://87[.]10[.]220[.]221/yakuza.mips
hxxp://87[.]10[.]220[.]221/yakuza.mipsel
hxxp://87[.]10[.]220[.]221/yakuza.ppc
hxxp://87[.]10[.]220[.]221/yakuza.sparc
hxxp://87[.]10[.]220[.]221/yakuza.x86
Hosts
103[.]149[.]87[.]69
ru[.]coziest[.]lol
f[.]codingdrunk[.]cc
www[.]codingdrunk[.]in
eighteen[.]pirate
nineteen[.]libre
75cents[.]libre
2joints[.]libre
fortyfivehundred[.]dyn
21savage[.]dyn
imaverygoodbadboy[.]libre
le[.]codingdrunk[.]in
87[.]11[.]174[.]141
pirati[.]abuser[.]eu
87[.]10[.]220[.]221
45[.]86[.]86[.]60
194[.]110[.]247[.]46
Files
Downloader
f71dc58cc969e79cb0fdfe5163fbb9ed4fee5e13cc9407a11d231601ee4c6e23
ea83411bd7b6e5a7364f7b8b9018f0f17f7084aeb58a47736dd80c99cfeac7f1
48a04c7c33a787ef72f1a61aec9fad87d6bd9c49542f52af7e029ac83475f45d
18c92006951f93a77df14eca6430f32389080838d97c9e47364bf82f6c21a907
FICORA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8349ba17f028b6a17aaa09cd17f1107409611a0734e06e6047ccc33e8ff669b0
b3ad8409d82500e790e6599337abe4d6edf5bd4c6737f8357d19edd82c88b064
ec87dc841af77ec2987f3e8ae316143218e9557e281ca13fb954536aa9f9caf1
784c9711eadceb7fedf022b7d7f00cff7a75d05c18ff726e257602e3a3ccccc1
bde6ef047e0880ac7ef02e56eb87d5bc39116e98ef97a5b1960e9a55cea5082b
c7be8d1b8948e1cb095d46376ced64367718ed2d9270c2fc99c7052a9d1ffed7
4600703535e35b464f0198a1fa95e3668a0c956ab68ce7b719c28031d69b86ff
6e3ef9404817e168c974000205b27723bc93abd7fbf0581c16bb5d2e1c5c6e4a
32e66b87f47245a892b102b7141d3845540b270c278e221f502807758a4e5dee
540c00e6c0b53332128b605b0d5e0926db0560a541bb13448d094764844763df
b74dbd02b7ebb51700f3c5900283e46570fe497f9b415d25a029623118073519
148f6b990fc1f1903287cd5c20276664b332dd3ba8d58f2bf8c26334c93c3af5
464e2f1faab2a40db44f118f7c3d1f9b300297fe6ced83fabe87563fc82efe95
b699cd64b9895cdcc325d7dd96c9eca623d3ec0247d20f39323547132c8fa63b
1007f5613a91a5d4170f28e24bfa704c8a63d95a2b4d033ff2bff7e2fe3dcffe
7a815d4ca3771de8a71cde2bdacf951bf48ea5854eb0a2af5db7d13ad51c44ab
d6a2a22000d68d79caeae482d8cf092c2d84d55dccee05e179a961c72f77b1ba
7ab36a93f009058e60c8a45b900c1c7ae38c96005a43a39e45be9dc7af9d6da8
803abfe19cdc6c0c41acfeb210a2361cab96d5926b2c43e5eb3b589a6ed189ad
7b29053306f194ca75021952f97f894d8eae6d2e1d02939df37b62d3845bfdb7
59704cf55b9fa439d6f7a36821a50178e9d73ddc5407ff340460c054d7defc54
aaa49b7b4f1e71623c42bc77bb7aa40534bcb7312da511b041799bf0e1a63ee7
1ca1d5a53c4379c3015c74af2b18c1d9285ac1a48d515f9b7827e4f900a61bde
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