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rule win_rombertik_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2026-09-17" version = "1" description = "Detects win.rombertik." info = "autogenerated rule brought to you by yara-signator" tool = "yara-signator v0.6.0" signator_config = "callsandjumps;datarefs;binvalue" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rombertik" malpedia_rule_date = "20260916" malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6" malpedia_version = "20260917" malpedia_license = "CC BY-SA 4.0" malpedia_sharing = "TLP:WHITE" /* DISCLAIMER * The strings used in this rule have been automatically selected from the * disassembly of memory dumps and unpacked files, using YARA-Signator. * The code and documentation is published here: * https://github.com/fxb-cocacoding/yara-signator * As Malpedia is used as data source, please note that for a given * number of families, only single samples are documented. * This likely impacts the degree of generalization these rules will offer. * Take the described generation method also into consideration when you * apply the rules in your use cases and assign them confidence levels. */ strings: $sequence_0 = { 57 ff15???????? 8bf0 85f6 742c 8b4508 } // n = 6, score = 200 // 57 | push edi // ff15???????? | // 8bf0 | mov esi, eax // 85f6 | test esi, esi // 742c | je 0x2e // 8b4508 | mov eax, dword ptr [ebp + 8] $sequence_1 = { 75f8 8b15???????? 8910 668b0d???????? 66894804 b8???????? } // n = 6, score = 200 // 75f8 | jne 0xfffffffa // 8b15???????? | // 8910 | mov dword ptr [eax], edx // 668b0d???????? | // 66894804 | mov word ptr [eax + 4], cx // b8???????? | $sequence_2 = { 57 50 8b4514 51 8b4d10 52 8b5508 } // n = 7, score = 200 // 57 | push edi // 50 | push eax // 8b4514 | mov eax, dword ptr [ebp + 0x14] // 51 | push ecx // 8b4d10 | mov ecx, dword ptr [ebp + 0x10] // 52 | push edx // 8b5508 | mov edx, dword ptr [ebp + 8] $sequence_3 = { ff15???????? 8d8ddcfdffff 8bf0 51 56 } // n = 5, score = 200 // ff15???????? | // 8d8ddcfdffff | lea ecx, [ebp - 0x224] // 8bf0 | mov esi, eax // 51 | push ecx // 56 | push esi $sequence_4 = { 56 ff15???????? 33db 8bcf e8???????? 50 8d8dfcfeffff } // n = 7, score = 200 // 56 | push esi // ff15???????? | // 33db | xor ebx, ebx // 8bcf | mov ecx, edi // e8???????? | // 50 | push eax // 8d8dfcfeffff | lea ecx, [ebp - 0x104] $sequence_5 = { 57 ffd6 85c0 0f843f010000 68???????? 57 ffd6 } // n = 7, score = 200 // 57 | push edi // ffd6 | call esi // 85c0 | test eax, eax // 0f843f010000 | je 0x145 // 68???????? | // 57 | push edi // ffd6 | call esi $sequence_6 = { ff15???????? 8bf0 85f6 742c 8b4508 8d5001 8da42400000000 } // n = 7, score = 200 // ff15???????? | // 8bf0 | mov esi, eax // 85f6 | test esi, esi // 742c | je 0x2e // 8b4508 | mov eax, dword ptr [ebp + 8] // 8d5001 | lea edx, [eax + 1] // 8da42400000000 | lea esp, [esp] $sequence_7 = { 50 51 e8???????? 83c414 8bc7 } // n = 5, score = 200 // 50 | push eax // 51 | push ecx // e8???????? | // 83c414 | add esp, 0x14 // 8bc7 | mov eax, edi $sequence_8 = { 55 8bec 83ec08 56 8b35???????? 6a00 6a01 } // n = 7, score = 200 // 55 | push ebp // 8bec | mov ebp, esp // 83ec08 | sub esp, 8 // 56 | push esi // 8b35???????? | // 6a00 | push 0 // 6a01 | push 1 $sequence_9 = { 8b75fc 56 6a00 ff15???????? 50 ff15???????? 5e } // n = 7, score = 200 // 8b75fc | mov esi, dword ptr [ebp - 4] // 56 | push esi // 6a00 | push 0 // ff15???????? | // 50 | push eax // ff15???????? | // 5e | pop esi condition: 7 of them and filesize < 73728 }
rule win_rombertik_w0 { meta: author = "Florian Roth" description = "Detects CarbonGrabber alias Rombertik - file Copy#064046.scr" reference = "http://blogs.cisco.com/security/talos/rombertik" date = "2015-05-05" hash = "2f9b26b90311e62662c5946a1ac600d2996d3758" hash = "aeb94064af2a6107a14fd32f39cb502e704cd0ab" hash = "c2005c8d1a79da5e02e6a15d00151018658c264c" hash = "98223d4ec272d3a631498b621618d875dd32161d" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rombertik" malpedia_version = "20170521" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $x1 = "ZwGetWriteWatch" fullword ascii $x2 = "OutputDebugStringA" fullword ascii $x3 = "malwar" fullword ascii $x4 = "sampl" fullword ascii $x5 = "viru" fullword ascii $x6 = "sandb" fullword ascii condition: uint16(0) == 0x5a4d and filesize < 5MB and all of them }
rule win_rombertik_w1 { meta: description = "Detects CarbonGrabber alias Rombertik panel install script - file install.php" author = "Florian Roth" reference = "http://blogs.cisco.com/security/talos/rombertik" date = "2015-05-05" hash = "cd6c152dd1e0689e0bede30a8bd07fef465fbcfa" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rombertik" malpedia_version = "20170521" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $s0 = "$insert = \"INSERT INTO `logs` (`id`, `ip`, `name`, `host`, `post`, `time`, `bro" ascii $s3 = "`post` text NOT NULL," fullword ascii $s4 = "`host` text NOT NULL," fullword ascii $s5 = ") ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=5 ;\" ;" fullword ascii $s6 = "$db->exec($columns); //or die(print_r($db->errorInfo(), true));;" fullword ascii $s9 = "$db->exec($insert);" fullword ascii $s10 = "`browser` text NOT NULL," fullword ascii $s13 = "`ip` text NOT NULL," fullword ascii condition: filesize < 3KB and all of them }
rule win_rombertik_w2 { meta: description = "Detects CarbonGrabber alias Rombertik Panel - file index.php" author = "Florian Roth" reference = "http://blogs.cisco.com/security/talos/rombertik" date = "2015-05-05" hash = "e6e9e4fc3772ff33bbeeda51f217e9149db60082" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rombertik" malpedia_version = "20170521" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $s0 = "echo '<meta http-equiv=\"refresh\" content=\"0;url=index.php?a=login\">';" fullword ascii $s1 = "echo '<meta http-equiv=\"refresh\" content=\"2;url='.$website.'/index.php?a=login" ascii $s2 = "header(\"location: $website/index.php?a=login\");" fullword ascii $s3 = "$insertLogSQL -> execute(array(':id' => NULL, ':ip' => $ip, ':name' => $name, ':" ascii $s16 = "if($_POST['username'] == $username && $_POST['password'] == $password){" fullword ascii $s17 = "$SQL = $db -> prepare(\"TRUNCATE TABLE `logs`\");" fullword ascii condition: filesize < 46KB and all of them }
rule win_rombertik_w3 { meta: description = "Detects CarbonGrabber alias Rombertik Builder - file Builder.exe" author = "Florian Roth" reference = "http://blogs.cisco.com/security/talos/rombertik" date = "2015-05-05" hash = "b50ecc0ba3d6ec19b53efe505d14276e9e71285f" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rombertik" malpedia_version = "20170521" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $s0 = "c:\\users\\iden\\documents\\visual studio 2010\\Projects\\FormGrabberBuilderC++" ascii $s1 = "Host(www.panel.com): " fullword ascii $s2 = "Path(/form/index.php?a=insert): " fullword ascii $s3 = "FileName: " fullword ascii $s4 = "~Rich8" fullword ascii condition: uint16(0) == 0x5a4d and filesize < 35KB and all of them }
rule win_rombertik_w4 { meta: description = "Detects CarbonGrabber alias Rombertik Builder Server - file Server.exe" author = "Florian Roth" reference = "http://blogs.cisco.com/security/talos/rombertik" date = "2015-05-05" hash = "895fab8d55882eac51d4b27a188aa67205ff0ae5" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rombertik" malpedia_version = "20170521" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $s0 = "C:\\WINDOWS\\system32\\svchost.exe" fullword ascii $s3 = "Software\\Microsoft\\Windows\\Currentversion\\RunOnce" fullword ascii $s4 = "chrome.exe" fullword ascii $s5 = "firefox.exe" fullword ascii $s6 = "chrome.dll" fullword ascii $s7 = "@KERNEL32.DLL" fullword wide $s8 = "Mozilla/5.0 (Windows NT 6.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome" ascii $s10 = "&post=" fullword ascii $s11 = "&host=" fullword ascii $s12 = "Ws2_32.dll" fullword ascii $s16 = "&browser=" fullword ascii condition: uint16(0) == 0x5a4d and filesize < 250KB and 8 of them }
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