win.pitou (Back to overview)

Pitou


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References
2019-07-08 ⋅ Johannes Bader
@online{bader:20190708:dga:0c56ba3, author = {Johannes Bader}, title = {{The DGA of Pitou}}, date = {2019-07-08}, url = {https://johannesbader.ch/2019/07/the-dga-of-pitou/}, language = {English}, urldate = {2020-01-10} } The DGA of Pitou
Pitou
2019-06-25 ⋅ SANSBrad Duncan
@online{duncan:20190625:rig:31ecb33, author = {Brad Duncan}, title = {{Rig Exploit Kit sends Pitou.B Trojan}}, date = {2019-06-25}, organization = {SANS}, url = {https://isc.sans.edu/diary/rss/25068}, language = {English}, urldate = {2019-12-17} } Rig Exploit Kit sends Pitou.B Trojan
Pitou
2018-01-15 ⋅ VirITGianfranco Tonello
@online{tonello:20180115:bootkits:dd9dffc, author = {Gianfranco Tonello}, title = {{Bootkits are not dead. Pitou is back!}}, date = {2018-01-15}, organization = {VirIT}, url = {https://www.tgsoft.it/english/news_archivio_eng.asp?id=884}, language = {English}, urldate = {2020-01-09} } Bootkits are not dead. Pitou is back!
Pitou
2014-09-04 ⋅ F-SecureF-Secure Labs
@techreport{labs:20140904:pitou:211eac4, author = {F-Secure Labs}, title = {{PITOU: The "silent" resurrection of the notorious Srizbi kernel spambot}}, date = {2014-09-04}, institution = {F-Secure}, url = {https://www.f-secure.com/documents/996508/1030745/pitou_whitepaper.pdf}, language = {English}, urldate = {2020-01-13} } PITOU: The "silent" resurrection of the notorious Srizbi kernel spambot
Pitou
Yara Rules
[TLP:WHITE] win_pitou_auto (20190204 | autogenerated rule brought to you by yara-signator)
rule win_pitou_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2019-11-26"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator 0.1a"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.pitou"
        malpedia_version = "20190204"
        malpedia_license = "CC BY-NC-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 / approach will be published in the near future 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 = { 80e103 8aec c0ed03 80e507 }
            // n = 4, score = 700
            //   80e103               | and                 cl, 3
            //   8aec                 | mov                 ch, ah
            //   c0ed03               | shr                 ch, 3
            //   80e507               | and                 ch, 7

        $sequence_1 = { 8a6201 80f457 8acc 80e103 }
            // n = 4, score = 700
            //   8a6201               | mov                 ah, byte ptr [edx + 1]
            //   80f457               | xor                 ah, 0x57
            //   8acc                 | mov                 cl, ah
            //   80e103               | and                 cl, 3

        $sequence_2 = { 9c 56 57 50 53 51 52 }
            // n = 7, score = 700
            //   9c                   | pushfd              
            //   56                   | push                esi
            //   57                   | push                edi
            //   50                   | push                eax
            //   53                   | push                ebx
            //   51                   | push                ecx
            //   52                   | push                edx

        $sequence_3 = { 8bc8 c1e90c 33c8 81e1ff0f0000 }
            // n = 4, score = 700
            //   8bc8                 | mov                 ecx, eax
            //   c1e90c               | shr                 ecx, 0xc
            //   33c8                 | xor                 ecx, eax
            //   81e1ff0f0000         | and                 ecx, 0xfff

        $sequence_4 = { 8bda c1e305 03c3 8bda c1eb02 }
            // n = 5, score = 700
            //   8bda                 | mov                 ebx, edx
            //   c1e305               | shl                 ebx, 5
            //   03c3                 | add                 eax, ebx
            //   8bda                 | mov                 ebx, edx
            //   c1eb02               | shr                 ebx, 2

        $sequence_5 = { 8bda c1e305 03c3 8bda c1eb02 03c3 }
            // n = 6, score = 700
            //   8bda                 | mov                 ebx, edx
            //   c1e305               | shl                 ebx, 5
            //   03c3                 | add                 eax, ebx
            //   8bda                 | mov                 ebx, edx
            //   c1eb02               | shr                 ebx, 2
            //   03c3                 | add                 eax, ebx

        $sequence_6 = { ac 8bda c1e305 03c3 8bda c1eb02 }
            // n = 6, score = 700
            //   ac                   | lodsb               al, byte ptr [esi]
            //   8bda                 | mov                 ebx, edx
            //   c1e305               | shl                 ebx, 5
            //   03c3                 | add                 eax, ebx
            //   8bda                 | mov                 ebx, edx
            //   c1eb02               | shr                 ebx, 2

        $sequence_7 = { 03c3 8bda c1eb02 03c3 }
            // n = 4, score = 700
            //   03c3                 | add                 eax, ebx
            //   8bda                 | mov                 ebx, edx
            //   c1eb02               | shr                 ebx, 2
            //   03c3                 | add                 eax, ebx

        $sequence_8 = { 8913 5b 58 5a }
            // n = 4, score = 700
            //   8913                 | mov                 dword ptr [ebx], edx
            //   5b                   | pop                 ebx
            //   58                   | pop                 eax
            //   5a                   | pop                 edx

        $sequence_9 = { 8a6201 80f457 8acc 80e103 8aec c0ed03 80e507 }
            // n = 7, score = 700
            //   8a6201               | mov                 ah, byte ptr [edx + 1]
            //   80f457               | xor                 ah, 0x57
            //   8acc                 | mov                 cl, ah
            //   80e103               | and                 cl, 3
            //   8aec                 | mov                 ch, ah
            //   c0ed03               | shr                 ch, 3
            //   80e507               | and                 ch, 7

    condition:
        7 of them
}
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