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/
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 |