Cross-Chain TxDataHiding Crypto Heist: A Very Chainful Process (Part 1)

2025-10-20 Ransom ISAC

https://ransom-isac.org/blog/cross-chain-txdatahiding-crypto-heist-part-3/

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Ransom-ISAC and Bridewell examined infrastructure from a suspected DPRK-linked cryptocurrency and data theft attempt that began with a weaponized private GitHub repository and used blockchain-based command-and-control. The intrusion involved a Python dropper using an HTTP API C2 channel over port 27017 and a Loader/RAT using HTTP API and socket.io channels over ports 27017 and 443. Four C2 IPs were tied to the activity, including 23.27.20[.]143, 136.0.9[.]8, 166.88.4[.]2, and 23.27.202[.]27, with shared traits such as EmbedIO/3.5.2 server headers, unusual cache-control headers, and specific keep-alive behavior. The infrastructure fingerprinting is useful because these rare service configurations and port choices can help defenders cluster related activity without relying solely on earlier attribution assumptions.

Indicators of Compromise

Type Value First Seen Last Seen
IPv4 23.27.202.27 2025-10-20 2026-06-12
IPv4 23.27.120.142 2025-10-20 2026-04-21
IPv4 85.239.62.36 2025-10-20 2026-04-21
IPv4 23.27.20.143 2025-10-20 2026-04-21
IPv4 136.0.9.8 2025-10-20 2026-04-21
IPv4 166.88.4.2 2025-10-20 2026-04-21
IPv4 202.155.8.173 2025-10-20 2026-04-11
IPv4 154.91.0.103 2025-10-20 2026-04-11
HASH be21bf4ad94c394202e7b52a1b461ed… 2025-10-20 2025-10-27
HASH 236ff897dee7d21319482cd67815bd2… 2025-10-20 2025-10-27
HASH 742016f01fa89be4d43916d5d2349c8… 2025-10-20 2025-10-27
HASH a7d7075e866132b8e8eb87265f7b7fa… 2025-10-20 2025-10-27
HASH eefe39fe88e75b37babb37c7379d1ec… 2025-10-20 2025-10-27
HASH 83a84588a941e463c981083555a2e78… 2025-10-20 2025-10-20
HASH 6e48fe09117ead1ef2c10a3db614217… 2025-10-20 2025-10-20
HASH 897d040e5db47b806c01eb2a1a056ca… 2025-10-20 2025-10-20
HASH 908696f3ec522e846575061e90747dd… 2025-10-20 2025-10-20
HASH 9f2ee094aae06afdf4461b94ddbfb7b… 2025-10-20 2025-10-20
HASH 736dd2e77c190d2eb418338f49dda10e 2025-10-20 2025-10-20
HASH 56ee3dc60471063c5ac82a617ed807a… 2025-10-20 2025-10-20
HASH a2880c2d262b4a76e64fd29a813f244… 2025-10-20 2025-10-20
HASH 973f777723d315e0bee0fb9e81e943b… 2025-10-20 2025-10-20
HASH a51c2b2c5134d8079f11a22bd0621d2… 2025-10-20 2025-10-20
HASH 24cad593f02db847d1302ee7c486d07… 2025-10-20 2025-10-20
HASH ba738d8fa5ecd4b996612dde6cd4516… 2025-10-20 2025-10-20
HASH 87330f64f5cd4695f2385f87c9ffffe… 2025-10-20 2025-10-20
HASH 43dc7a343649a7ce748e4c2f94bcb60… 2025-10-20 2025-10-20
HASH 77a2e59d991aad2db848827968d9faa… 2025-10-20 2025-10-20
HASH 37df04dbd54b51273251708f1d014a6… 2025-10-20 2025-10-20
URL https://orlan-security.ru 2025-10-20 2025-10-20
URL https://orlan-security.ru/ 2025-10-20 2025-10-20
URL https://www.anti-malware.ru/ana… 2025-10-20 2025-10-20
DOMAIN orlan-security.ru 2025-10-20 2025-10-20
IPv4 91.242.241.122 2025-10-20 2025-10-20
IPv4 166.88.61.35 2025-10-20 2025-10-20
IPv4 136.0.141.91 2025-10-20 2025-10-20
IPv4 166.88.101.20 2025-10-20 2025-10-20
IPv4 183.101.157.30 2025-10-20 2025-10-20
IPv4 156.235.89.227 2025-10-20 2025-10-20
IPv4 166.88.55.54 2025-10-20 2025-10-20
IPv4 91.242.241.183 2025-10-20 2025-10-20
IPv4 23.26.237.117 2025-10-20 2025-10-20
IPv4 166.88.14.44 2025-10-20 2025-10-20
IPv4 166.88.95.137 2025-10-20 2025-10-20
IPv4 23.27.48.77 2025-10-20 2025-10-20
IPv4 78.25.122.218 2025-10-20 2025-10-20
IPv4 91.242.241.117 2025-10-20 2025-10-20
IPv4 136.0.141.245 2025-10-20 2025-10-20
IPv4 223.165.6.30 2025-10-20 2025-10-20
IPv4 23.27.201.30 2025-10-20 2025-10-20
IPv4 23.27.124.91 2025-10-20 2025-10-20
IPv4 38.211.230.55 2025-10-20 2025-10-20
IPv4 23.27.12.214 2025-10-20 2025-10-20
IPv4 166.88.132.69 2025-10-20 2025-10-20
IPv4 166.88.98.221 2025-10-20 2025-10-20
IPv4 78.25.123.153 2025-10-20 2025-10-20
IPv4 91.218.183.90 2025-10-20 2025-10-20
IPv4 136.0.3.71 2025-10-20 2025-10-20
IPv4 166.88.90.22 2025-10-20 2025-10-20
IPv4 78.25.108.249 2025-10-20 2025-10-20
IPv4 166.88.117.11 2025-10-20 2025-10-20
IPv4 78.25.121.187 2025-10-20 2025-10-20
IPv4 78.25.123.242 2025-10-20 2025-10-20
IPv4 23.27.244.39 2025-10-20 2025-10-20
IPv4 166.88.117.240 2025-10-20 2025-10-20
IPv4 156.236.76.90 2025-10-20 2025-10-20
IPv4 108.165.147.181 2025-10-20 2025-10-20
IPv4 166.88.2.184 2025-10-20 2025-10-20
IPv4 85.26.218.114 2025-10-20 2025-10-20
IPv4 172.121.5.230 2025-10-20 2025-10-20
IPv4 91.242.241.55 2025-10-20 2025-10-20
IPv4 78.25.109.155 2025-10-20 2025-10-20
IPv4 34.231.213.130 2025-10-20 2025-10-20
IPv4 91.99.83.196 2025-10-20 2025-10-20
IPv4 85.239.60.213 2025-10-20 2025-10-20
IPv4 195.122.31.246 2025-10-20 2025-10-20
IPv4 193.57.57.121 2025-10-20 2025-10-20
IPv4 45.194.27.99 2025-10-20 2025-10-20
IPv4 166.88.61.53 2025-10-20 2025-10-20
IPv4 45.86.231.67 2025-10-20 2025-10-20
IPv4 91.242.241.15 2025-10-20 2025-10-20
IPv4 136.0.11.193 2025-10-20 2025-10-20
IPv4 23.27.24.90 2025-10-20 2025-10-20
IPv4 166.0.132.184 2025-10-20 2025-10-20
IPv4 191.96.53.163 2025-10-20 2025-10-20
IPv4 34.250.221.219 2025-10-20 2025-10-20
IPv4 166.88.159.187 2025-10-20 2025-10-20
IPv4 216.173.64.63 2025-10-20 2025-10-20
IPv4 166.88.61.58 2025-10-20 2025-10-20
IPv4 136.0.3.240 2025-10-20 2025-10-20
IPv4 166.88.35.203 2025-10-20 2025-10-20
IPv4 166.88.57.117 2025-10-20 2025-10-20
IPv4 78.25.111.63 2025-10-20 2025-10-20
IPv4 45.138.16.208 2025-10-20 2025-10-20
IPv4 166.88.96.120 2025-10-20 2025-10-20
IPv4 181.117.128.64 2025-10-20 2025-10-20
IPv4 166.88.194.123 2025-10-20 2025-10-20
IPv4 38.211.230.5 2025-10-20 2025-10-20
IPv4 166.88.159.37 2025-10-20 2025-10-20
IPv4 37.27.108.244 2025-10-20 2025-10-20
IPv4 45.195.76.26 2025-10-20 2025-10-20
IPv4 166.88.194.53 2025-10-20 2025-10-20
IPv4 166.88.99.15 2025-10-20 2025-10-20
IPv4 166.88.141.40 2025-10-20 2025-10-20
IPv4 23.27.48.4 2025-10-20 2025-10-20
IPv4 23.27.24.227 2025-10-20 2025-10-20
IPv4 166.88.100.85 2025-10-20 2025-10-20
IPv4 78.25.123.240 2025-10-20 2025-10-20
IPv4 91.242.241.170 2025-10-20 2025-10-20
IPv4 198.105.127.124 2025-10-20 2025-10-20
IPv4 23.27.169.64 2025-10-20 2025-10-20
IPv4 154.216.19.19 2025-10-20 2025-10-20
IPv4 23.27.169.4 2025-10-20 2025-10-20
IPv4 166.88.14.137 2025-10-20 2025-10-20
IPv4 78.25.123.249 2025-10-20 2025-10-20
IPv4 136.0.8.169 2025-10-20 2025-10-20
IPv4 136.0.3.250 2025-10-20 2025-10-20
IPv4 62.106.66.151 2025-10-20 2025-10-20
IPv4 198.105.127.98 2025-10-20 2025-10-20
IPv4 166.88.2.90 2025-10-20 2025-10-20
IPv4 155.254.60.160 2025-10-20 2025-10-20
IPv4 57.128.212.19 2025-10-20 2025-10-20
IPv4 23.27.201.57 2025-10-20 2025-10-20
IPv4 78.25.123.66 2025-10-20 2025-10-20
IPv4 23.131.92.195 2025-10-20 2025-10-20
IPv4 166.88.132.139 2025-10-20 2025-10-20
IPv4 91.242.241.31 2025-10-20 2025-10-20
IPv4 50.114.5.82 2025-10-20 2025-10-20
IPv4 23.27.240.252 2025-10-20 2025-10-20
IPv4 23.27.48.179 2025-10-20 2025-10-20
IPv4 91.242.241.174 2025-10-20 2025-10-20
IPv4 96.126.191.167 2025-10-20 2025-10-20
IPv4 23.27.240.237 2025-10-20 2025-10-20
IPv4 166.88.114.78 2025-10-20 2025-10-20
IPv4 216.173.65.45 2025-10-20 2025-10-20
IPv4 38.246.73.120 2025-10-20 2025-10-20
IPv4 103.179.142.121 2025-10-20 2025-10-20
IPv4 23.27.48.113 2025-10-20 2025-10-20
IPv4 156.227.0.60 2025-10-20 2025-10-20
IPv4 154.81.220.233 2025-10-20 2025-10-20
IPv4 23.27.163.245 2025-10-20 2025-10-20
IPv4 45.129.199.127 2025-10-20 2025-10-20
IPv4 5.252.178.86 2025-10-20 2025-10-20
IPv4 23.27.168.222 2025-10-20 2025-10-20
IPv4 23.26.237.237 2025-10-20 2025-10-20
IPv4 45.195.76.82 2025-10-20 2025-10-20
IPv4 166.88.97.138 2025-10-20 2025-10-20
IPv4 166.88.14.52 2025-10-20 2025-10-20
IPv4 156.227.0.187 2025-10-20 2025-10-20
IPv4 166.88.132.39 2024-10-23 2025-10-20
IPv4 142.111.77.196 2024-08-01 2025-10-20

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