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rule win_rombertik_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2024-10-31" 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 = "20241030" malpedia_hash = "26e26953c49c8efafbf72a38076855d578e0a2e4" malpedia_version = "20241030" 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 = { 7549 68???????? 8d95e0feffff 52 ffd7 } // n = 5, score = 200 // 7549 | jne 0x4b // 68???????? | // 8d95e0feffff | lea edx, [ebp - 0x120] // 52 | push edx // ffd7 | call edi $sequence_1 = { 0fb69c3500ffffff 03d9 81e3ff000080 7908 4b } // n = 5, score = 200 // 0fb69c3500ffffff | movzx ebx, byte ptr [ebp + esi - 0x100] // 03d9 | add ebx, ecx // 81e3ff000080 | and ebx, 0x800000ff // 7908 | jns 0xa // 4b | dec ebx $sequence_2 = { 8b5508 8b45fc 52 6800010000 50 } // n = 5, score = 200 // 8b5508 | mov edx, dword ptr [ebp + 8] // 8b45fc | mov eax, dword ptr [ebp - 4] // 52 | push edx // 6800010000 | push 0x100 // 50 | push eax $sequence_3 = { 56 885dfd ff15???????? 85c0 0f846c010000 807dfde9 0f8462010000 } // n = 7, score = 200 // 56 | push esi // 885dfd | mov byte ptr [ebp - 3], bl // ff15???????? | // 85c0 | test eax, eax // 0f846c010000 | je 0x172 // 807dfde9 | cmp byte ptr [ebp - 3], 0xe9 // 0f8462010000 | je 0x168 $sequence_4 = { 8d85fcfeffff e8???????? 8b4508 57 } // n = 4, score = 200 // 8d85fcfeffff | lea eax, [ebp - 0x104] // e8???????? | // 8b4508 | mov eax, dword ptr [ebp + 8] // 57 | push edi $sequence_5 = { 68ffff1f00 ff15???????? 8bf0 3bf3 7473 } // n = 5, score = 200 // 68ffff1f00 | push 0x1fffff // ff15???????? | // 8bf0 | mov esi, eax // 3bf3 | cmp esi, ebx // 7473 | je 0x75 $sequence_6 = { 8d95e0feffff 52 ffd7 85c0 } // n = 4, score = 200 // 8d95e0feffff | lea edx, [ebp - 0x120] // 52 | push edx // ffd7 | call edi // 85c0 | test eax, eax $sequence_7 = { 83c410 85c0 7409 6a00 ffd0 83c404 5e } // n = 7, score = 200 // 83c410 | add esp, 0x10 // 85c0 | test eax, eax // 7409 | je 0xb // 6a00 | push 0 // ffd0 | call eax // 83c404 | add esp, 4 // 5e | pop esi $sequence_8 = { 8d95e0feffff 52 ffd6 85c0 } // n = 4, score = 200 // 8d95e0feffff | lea edx, [ebp - 0x120] // 52 | push edx // ffd6 | call esi // 85c0 | test eax, eax $sequence_9 = { 3bc3 0f8486010000 53 6a01 8d4dfd } // n = 5, score = 200 // 3bc3 | cmp eax, ebx // 0f8486010000 | je 0x18c // 53 | push ebx // 6a01 | push 1 // 8d4dfd | lea ecx, [ebp - 3] 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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