SYMBOLCOMMON_NAMEaka. SYNONYMS
win.citadel (Back to overview)

Citadel

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References
2016-02-19XyliBoxXylitol
@online{xylitol:20160219:citadel:93968a2, author = {Xylitol}, title = {{Citadel 0.0.1.1 (Atmos)}}, date = {2016-02-19}, organization = {XyliBox}, url = {http://www.xylibox.com/2016/02/citadel-0011-atmos.html}, language = {English}, urldate = {2020-01-09} } Citadel 0.0.1.1 (Atmos)
Citadel
2016-02-16JPCERT/CCJPCert
@online{jpcert:20160216:banking:43d5789, author = {JPCert}, title = {{Banking Trojan “Citadel” Returns}}, date = {2016-02-16}, organization = {JPCERT/CC}, url = {http://blog.jpcert.or.jp/2016/02/banking-trojan--27d6.html}, language = {English}, urldate = {2019-12-19} } Banking Trojan “Citadel” Returns
Citadel
2012-11-05MalwarebytesJérôme Segura
@online{segura:20121105:citadel:f1d7f7d, author = {Jérôme Segura}, title = {{Citadel: a cyber-criminal’s ultimate weapon?}}, date = {2012-11-05}, organization = {Malwarebytes}, url = {https://blog.malwarebytes.com/threat-analysis/2012/11/citadel-a-cyber-criminals-ultimate-weapon/}, language = {English}, urldate = {2019-12-20} } Citadel: a cyber-criminal’s ultimate weapon?
Citadel
Yara Rules
[TLP:WHITE] win_citadel_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_citadel_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.citadel"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { eb0e 6800800000 53 57 }
            // n = 4, score = 4900
            //   eb0e                 | jmp                 0x10
            //   6800800000           | push                0x8000
            //   53                   | push                ebx
            //   57                   | push                edi

        $sequence_1 = { 8b4508 6a03 e8???????? 894508 85c0 75d2 8d041f }
            // n = 7, score = 4800
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   6a03                 | push                3
            //   e8????????           |                     
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   85c0                 | test                eax, eax
            //   75d2                 | jne                 0xffffffd4
            //   8d041f               | lea                 eax, [edi + ebx]

        $sequence_2 = { 8bc3 e8???????? 8b4d08 8bd3 89442414 }
            // n = 5, score = 4800
            //   8bc3                 | mov                 eax, ebx
            //   e8????????           |                     
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8bd3                 | mov                 edx, ebx
            //   89442414             | mov                 dword ptr [esp + 0x14], eax

        $sequence_3 = { 8d7c0201 8bc7 e8???????? 8b1d???????? 8bf0 }
            // n = 5, score = 4800
            //   8d7c0201             | lea                 edi, [edx + eax + 1]
            //   8bc7                 | mov                 eax, edi
            //   e8????????           |                     
            //   8b1d????????         |                     
            //   8bf0                 | mov                 esi, eax

        $sequence_4 = { 8bec ff7508 e8???????? e8???????? 5d ff25???????? }
            // n = 6, score = 4800
            //   8bec                 | mov                 ebp, esp
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   e8????????           |                     
            //   5d                   | pop                 ebp
            //   ff25????????         |                     

        $sequence_5 = { 8364241000 ff742410 e8???????? 5f 5e }
            // n = 5, score = 4800
            //   8364241000           | and                 dword ptr [esp + 0x10], 0
            //   ff742410             | push                dword ptr [esp + 0x10]
            //   e8????????           |                     
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_6 = { e8???????? 84db 741e ff75f0 }
            // n = 4, score = 4800
            //   e8????????           |                     
            //   84db                 | test                bl, bl
            //   741e                 | je                  0x20
            //   ff75f0               | push                dword ptr [ebp - 0x10]

        $sequence_7 = { 56 e8???????? 53 e9???????? 8b4c2414 53 c644241300 }
            // n = 7, score = 4800
            //   56                   | push                esi
            //   e8????????           |                     
            //   53                   | push                ebx
            //   e9????????           |                     
            //   8b4c2414             | mov                 ecx, dword ptr [esp + 0x14]
            //   53                   | push                ebx
            //   c644241300           | mov                 byte ptr [esp + 0x13], 0

        $sequence_8 = { 85c9 7408 8906 890f }
            // n = 4, score = 4800
            //   85c9                 | test                ecx, ecx
            //   7408                 | je                  0xa
            //   8906                 | mov                 dword ptr [esi], eax
            //   890f                 | mov                 dword ptr [edi], ecx

        $sequence_9 = { 57 57 6a01 57 57 8bc6 50 }
            // n = 7, score = 4800
            //   57                   | push                edi
            //   57                   | push                edi
            //   6a01                 | push                1
            //   57                   | push                edi
            //   57                   | push                edi
            //   8bc6                 | mov                 eax, esi
            //   50                   | push                eax

        $sequence_10 = { 5f 5d ff25???????? 55 8bec ff7508 e8???????? }
            // n = 7, score = 4800
            //   5f                   | pop                 edi
            //   5d                   | pop                 ebp
            //   ff25????????         |                     
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     

        $sequence_11 = { 53 8d8c0800fcffff 56 57 }
            // n = 4, score = 4800
            //   53                   | push                ebx
            //   8d8c0800fcffff       | lea                 ecx, [eax + ecx - 0x400]
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_12 = { 89442414 e8???????? 84c0 7407 c644240f01 eb2f 8bcb }
            // n = 7, score = 4800
            //   89442414             | mov                 dword ptr [esp + 0x14], eax
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   7407                 | je                  9
            //   c644240f01           | mov                 byte ptr [esp + 0xf], 1
            //   eb2f                 | jmp                 0x31
            //   8bcb                 | mov                 ecx, ebx

        $sequence_13 = { 50 e8???????? 6a44 5a 52 }
            // n = 5, score = 4800
            //   50                   | push                eax
            //   e8????????           |                     
            //   6a44                 | push                0x44
            //   5a                   | pop                 edx
            //   52                   | push                edx

        $sequence_14 = { 0f84e1feffff 037d0c 53 57 }
            // n = 4, score = 4800
            //   0f84e1feffff         | je                  0xfffffee7
            //   037d0c               | add                 edi, dword ptr [ebp + 0xc]
            //   53                   | push                ebx
            //   57                   | push                edi

    condition:
        7 of them and filesize < 1236992
}
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