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Malware Analysis
IDAPython script to decode NightHawk strings
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<blockquote data-quote="struppigel" data-source="post: 1012604" data-attributes="member: 86910"><p>This script will search in NightHawk samples for the decode function and the substitution alphabets, then decode strings referenced by the decoder function, then add the plaintext strings as comments to IDA.</p><p></p><p>In IDA it looks like this:</p><p>[spoiler]</p><p>[ATTACH=full]270959[/ATTACH]</p><p></p><p>[ATTACH=full]270960[/ATTACH]</p><p>[/spoiler]</p><p></p><p>Tested on IDA 8.1 with the following NightHawk samples:</p><p>[URL unfurl="true"]https://bazaar.abuse.ch/sample/0551ca07f05c2a8278229c1dc651a2b1273a39914857231b075733753cb2b988[/URL]</p><p>[URL unfurl="true"]https://bazaar.abuse.ch/sample/9a57919cc5c194e28acd62719487c563a8f0ef1205b65adbe535386e34e418b8[/URL]</p><p></p><p>This article was of great help for NightHawk analysis: <a href="https://www.proofpoint.com/us/blog/threat-insight/nighthawk-and-coming-pentest-tool-likely-gain-threat-actor-notice" target="_blank">Nighthawk: An Up-and-Coming Pentest Tool Likely to Gain Threat Actor Notice | Proofpoint US</a></p><p></p><p>The IDAPython script is in my repo: <a href="https://github.com/struppigel/hedgehog-tools/blob/main/nighthawk_str_decoder.py" target="_blank">hedgehog-tools/nighthawk_str_decoder.py at main · struppigel/hedgehog-tools</a></p></blockquote><p></p>
[QUOTE="struppigel, post: 1012604, member: 86910"] This script will search in NightHawk samples for the decode function and the substitution alphabets, then decode strings referenced by the decoder function, then add the plaintext strings as comments to IDA. In IDA it looks like this: [spoiler] [ATTACH type="full" alt="nh.png"]270959[/ATTACH] [ATTACH type="full" alt="nh2.png"]270960[/ATTACH] [/spoiler] Tested on IDA 8.1 with the following NightHawk samples: [URL unfurl="true"]https://bazaar.abuse.ch/sample/0551ca07f05c2a8278229c1dc651a2b1273a39914857231b075733753cb2b988[/URL] [URL unfurl="true"]https://bazaar.abuse.ch/sample/9a57919cc5c194e28acd62719487c563a8f0ef1205b65adbe535386e34e418b8[/URL] This article was of great help for NightHawk analysis: [URL='https://www.proofpoint.com/us/blog/threat-insight/nighthawk-and-coming-pentest-tool-likely-gain-threat-actor-notice']Nighthawk: An Up-and-Coming Pentest Tool Likely to Gain Threat Actor Notice | Proofpoint US[/URL] The IDAPython script is in my repo: [URL='https://github.com/struppigel/hedgehog-tools/blob/main/nighthawk_str_decoder.py']hedgehog-tools/nighthawk_str_decoder.py at main · struppigel/hedgehog-tools[/URL] [/QUOTE]
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