Rombertik (Malware Family)

SYMBOL	COMMON_NAME	aka. SYNONYMS

win.rombertik (Back to overview)

Rombertik

aka: CarbonGrabber

There is no description at this point.

References

2015-05-04 ⋅ Cisco Talos ⋅ Ben Baker, Alex Chiu
Threat Spotlight: Rombertik – Gazing Past the Smoke, Mirrors, and Trapdoors
Rombertik

Yara Rules

[TLP:WHITE] win_rombertik_auto (20230125 \| Detects win.rombertik.) rule win_rombertik_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" 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 = "20230124" malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686" malpedia_version = "20230125" 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 = { 7409 8b55f0 035508 8955f8 57 } // n = 5, score = 200 // 7409 \| je 0xb // 8b55f0 \| mov edx, dword ptr [ebp - 0x10] // 035508 \| add edx, dword ptr [ebp + 8] // 8955f8 \| mov dword ptr [ebp - 8], edx // 57 \| push edi $sequence_2 = { 81c900ffffff 41 8a9c0d00ffffff 889c0500ffffff 40 88940d00ffffff } // n = 6, score = 200 // 81c900ffffff \| or ecx, 0xffffff00 // 41 \| inc ecx // 8a9c0d00ffffff \| mov bl, byte ptr [ebp + ecx - 0x100] // 889c0500ffffff \| mov byte ptr [ebp + eax - 0x100], bl // 40 \| inc eax // 88940d00ffffff \| mov byte ptr [ebp + ecx - 0x100], dl $sequence_3 = { 0f843f010000 68???????? 57 ffd6 85c0 7510 } // n = 6, score = 200 // 0f843f010000 \| je 0x145 // 68???????? \| // 57 \| push edi // ffd6 \| call esi // 85c0 \| test eax, eax // 7510 \| jne 0x12 $sequence_4 = { a3???????? e8???????? 83c408 a3???????? ff15???????? 50 ff15???????? } // n = 7, score = 200 // a3???????? \| // e8???????? \| // 83c408 \| add esp, 8 // a3???????? \| // ff15???????? \| // 50 \| push eax // ff15???????? \| $sequence_5 = { 8b35???????? 6a00 6a01 6a00 6a00 8d45fc } // n = 6, score = 200 // 8b35???????? \| // 6a00 \| push 0 // 6a01 \| push 1 // 6a00 \| push 0 // 6a00 \| push 0 // 8d45fc \| lea eax, [ebp - 4] $sequence_6 = { 60 8b75fc bf???????? 8b4df8 f3a4 } // n = 5, score = 200 // 60 \| pushal // 8b75fc \| mov esi, dword ptr [ebp - 4] // bf???????? \| // 8b4df8 \| mov ecx, dword ptr [ebp - 8] // f3a4 \| rep movsb byte ptr es:[edi], byte ptr [esi] $sequence_7 = { 8b5508 8b7510 03d7 8ac3 2bf1 3c78 7507 } // n = 7, score = 200 // 8b5508 \| mov edx, dword ptr [ebp + 8] // 8b7510 \| mov esi, dword ptr [ebp + 0x10] // 03d7 \| add edx, edi // 8ac3 \| mov al, bl // 2bf1 \| sub esi, ecx // 3c78 \| cmp al, 0x78 // 7507 \| jne 9 $sequence_8 = { 8b75f0 2bdf c607e9 83eb05 895f01 } // n = 5, score = 200 // 8b75f0 \| mov esi, dword ptr [ebp - 0x10] // 2bdf \| sub ebx, edi // c607e9 \| mov byte ptr [edi], 0xe9 // 83eb05 \| sub ebx, 5 // 895f01 \| mov dword ptr [edi + 1], ebx $sequence_9 = { 895df0 8945f4 663b4b06 0f8394000000 8945fc 8bff 8b573c } // n = 7, score = 200 // 895df0 \| mov dword ptr [ebp - 0x10], ebx // 8945f4 \| mov dword ptr [ebp - 0xc], eax // 663b4b06 \| cmp cx, word ptr [ebx + 6] // 0f8394000000 \| jae 0x9a // 8945fc \| mov dword ptr [ebp - 4], eax // 8bff \| mov edi, edi // 8b573c \| mov edx, dword ptr [edi + 0x3c] condition: 7 of them and filesize < 73728 }
[TLP:WHITE] win_rombertik_w0 (20170521 \| Detects CarbonGrabber alias Rombertik - file Copy#064046.scr) 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 }
[TLP:WHITE] win_rombertik_w1 (20170521 \| Detects CarbonGrabber alias Rombertik panel install script - file install.php) 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 }
[TLP:WHITE] win_rombertik_w2 (20170521 \| Detects CarbonGrabber alias Rombertik Panel - file index.php) 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 }
[TLP:WHITE] win_rombertik_w3 (20170521 \| Detects CarbonGrabber alias Rombertik Builder - file Builder.exe) 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 }
[TLP:WHITE] win_rombertik_w4 (20170521 \| Detects CarbonGrabber alias Rombertik Builder Server - file Server.exe) 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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