SYMBOLCOMMON_NAMEaka. SYNONYMS
win.nitol (Back to overview)

Nitol

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References
2012-12-27WikipediaVarious
@online{various:20121227:nitol:63a0ed5, author = {Various}, title = {{Nitol botnet}}, date = {2012-12-27}, organization = {Wikipedia}, url = {https://en.wikipedia.org/wiki/Nitol_botnet}, language = {English}, urldate = {2020-01-13} } Nitol botnet
Nitol
2012-09-19KrebsOnSecurityBrian Krebs
@online{krebs:20120919:blog:c9b0499, author = {Brian Krebs}, title = {{Blog Posts on Nitol}}, date = {2012-09-19}, organization = {KrebsOnSecurity}, url = {https://krebsonsecurity.com/tag/nitol/}, language = {English}, urldate = {2020-01-13} } Blog Posts on Nitol
Nitol
2012-09-13MicrosoftRichard Domingues Boscovich
@online{boscovich:20120913:microsoft:da601a2, author = {Richard Domingues Boscovich}, title = {{Microsoft Disrupts the Emerging Nitol Botnet Being Spread through an Unsecure Supply Chain}}, date = {2012-09-13}, organization = {Microsoft}, url = {https://blogs.technet.microsoft.com/microsoft_blog/2012/09/13/microsoft-disrupts-the-emerging-nitol-botnet-being-spread-through-an-unsecure-supply-chain/}, language = {English}, urldate = {2020-01-13} } Microsoft Disrupts the Emerging Nitol Botnet Being Spread through an Unsecure Supply Chain
Nitol
Yara Rules
[TLP:WHITE] win_nitol_auto (20220411 | Detects win.nitol.)
rule win_nitol_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.nitol."
        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.nitol"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 8d8554ffffff 50 e8???????? 83c420 bffa000000 }
            // n = 5, score = 200
            //   8d8554ffffff         | lea                 eax, dword ptr [ebp - 0xac]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c420               | add                 esp, 0x20
            //   bffa000000           | mov                 edi, 0xfa

        $sequence_1 = { 8d45d0 50 57 e8???????? 83c414 8d4590 c7459040000000 }
            // n = 7, score = 200
            //   8d45d0               | lea                 eax, dword ptr [ebp - 0x30]
            //   50                   | push                eax
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14
            //   8d4590               | lea                 eax, dword ptr [ebp - 0x70]
            //   c7459040000000       | mov                 dword ptr [ebp - 0x70], 0x40

        $sequence_2 = { 8945dc 897de0 c645e450 c645e504 }
            // n = 4, score = 200
            //   8945dc               | mov                 dword ptr [ebp - 0x24], eax
            //   897de0               | mov                 dword ptr [ebp - 0x20], edi
            //   c645e450             | mov                 byte ptr [ebp - 0x1c], 0x50
            //   c645e504             | mov                 byte ptr [ebp - 0x1b], 4

        $sequence_3 = { 53 6a12 5b 8d45ec 6a10 50 }
            // n = 6, score = 200
            //   53                   | push                ebx
            //   6a12                 | push                0x12
            //   5b                   | pop                 ebx
            //   8d45ec               | lea                 eax, dword ptr [ebp - 0x14]
            //   6a10                 | push                0x10
            //   50                   | push                eax

        $sequence_4 = { c3 c3 55 8bec 81ec30030000 53 }
            // n = 6, score = 200
            //   c3                   | ret                 
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81ec30030000         | sub                 esp, 0x330
            //   53                   | push                ebx

        $sequence_5 = { 50 57 e8???????? 59 03c6 50 8d8500ffffff }
            // n = 7, score = 200
            //   50                   | push                eax
            //   57                   | push                edi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   03c6                 | add                 eax, esi
            //   50                   | push                eax
            //   8d8500ffffff         | lea                 eax, dword ptr [ebp - 0x100]

        $sequence_6 = { c1e002 3be8 7ce3 e9???????? 8b2d???????? 33db 39be88000000 }
            // n = 7, score = 200
            //   c1e002               | shl                 eax, 2
            //   3be8                 | cmp                 ebp, eax
            //   7ce3                 | jl                  0xffffffe5
            //   e9????????           |                     
            //   8b2d????????         |                     
            //   33db                 | xor                 ebx, ebx
            //   39be88000000         | cmp                 dword ptr [esi + 0x88], edi

        $sequence_7 = { 52 e8???????? 8bf8 8d855cffffff 57 53 }
            // n = 6, score = 200
            //   52                   | push                edx
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   8d855cffffff         | lea                 eax, dword ptr [ebp - 0xa4]
            //   57                   | push                edi
            //   53                   | push                ebx

        $sequence_8 = { 50 8d856cfeffff 50 8d45f4 50 6a00 68???????? }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8d856cfeffff         | lea                 eax, dword ptr [ebp - 0x194]
            //   50                   | push                eax
            //   8d45f4               | lea                 eax, dword ptr [ebp - 0xc]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   68????????           |                     

        $sequence_9 = { 8945f8 ff7508 ff15???????? 85c0 }
            // n = 4, score = 200
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

    condition:
        7 of them and filesize < 139264
}
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