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rule win_rombertik_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2022-05-16" 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 = "20220513" malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26" malpedia_version = "20220516" 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 = { 56 68???????? e9???????? 8d85c8fdffff } // n = 4, score = 200 // 56 | push esi // 68???????? | // e9???????? | // 8d85c8fdffff | lea eax, [ebp - 0x238] $sequence_1 = { 7472 6a00 6880000000 6a03 6a00 } // n = 5, score = 200 // 7472 | je 0x74 // 6a00 | push 0 // 6880000000 | push 0x80 // 6a03 | push 3 // 6a00 | push 0 $sequence_2 = { 83c410 eb2d 837d1400 7427 8b7d18 85ff } // n = 6, score = 200 // 83c410 | add esp, 0x10 // eb2d | jmp 0x2f // 837d1400 | cmp dword ptr [ebp + 0x14], 0 // 7427 | je 0x29 // 8b7d18 | mov edi, dword ptr [ebp + 0x18] // 85ff | test edi, edi $sequence_3 = { 7537 6a02 68???????? 8d85e0feffff 50 } // n = 5, score = 200 // 7537 | jne 0x39 // 6a02 | push 2 // 68???????? | // 8d85e0feffff | lea eax, [ebp - 0x120] // 50 | push eax $sequence_4 = { 85c0 743b 807dfee9 7435 56 } // n = 5, score = 200 // 85c0 | test eax, eax // 743b | je 0x3d // 807dfee9 | cmp byte ptr [ebp - 2], 0xe9 // 7435 | je 0x37 // 56 | push esi $sequence_5 = { 52 53 68ffff1f00 ff15???????? 8bf0 3bf3 0f84fd000000 } // n = 7, score = 200 // 52 | push edx // 53 | push ebx // 68ffff1f00 | push 0x1fffff // ff15???????? | // 8bf0 | mov esi, eax // 3bf3 | cmp esi, ebx // 0f84fd000000 | je 0x103 $sequence_6 = { 8b5d0c 85db 0f84cb000000 837d1400 0f84c1000000 817d18a00f0000 0f87b4000000 } // n = 7, score = 200 // 8b5d0c | mov ebx, dword ptr [ebp + 0xc] // 85db | test ebx, ebx // 0f84cb000000 | je 0xd1 // 837d1400 | cmp dword ptr [ebp + 0x14], 0 // 0f84c1000000 | je 0xc7 // 817d18a00f0000 | cmp dword ptr [ebp + 0x18], 0xfa0 // 0f87b4000000 | ja 0xba $sequence_7 = { 0f841a010000 8b95d0feffff 52 53 68ffff1f00 ff15???????? } // n = 6, score = 200 // 0f841a010000 | je 0x120 // 8b95d0feffff | mov edx, dword ptr [ebp - 0x130] // 52 | push edx // 53 | push ebx // 68ffff1f00 | push 0x1fffff // ff15???????? | $sequence_8 = { 8b4dfc f3a4 61 8b75f0 } // n = 4, score = 200 // 8b4dfc | mov ecx, dword ptr [ebp - 4] // f3a4 | rep movsb byte ptr es:[edi], byte ptr [esi] // 61 | popal // 8b75f0 | mov esi, dword ptr [ebp - 0x10] $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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