SYMBOLCOMMON_NAMEaka. SYNONYMS
win.backspace (Back to overview)

backspace

aka: Lecna, ZRLnk

Actor(s): APT 30


There is no description at this point.

References
2020-06-19Positive TechnologiesAlexey Vishnyakov
@online{vishnyakov:20200619:eagle:01efbbd, author = {Alexey Vishnyakov}, title = {{The eagle eye is back: old and new backdoors from APT30}}, date = {2020-06-19}, organization = {Positive Technologies}, url = {https://www.ptsecurity.com/ww-en/analytics/pt-esc-threat-intelligence/eagle-eye-is-back-apt30/}, language = {English}, urldate = {2020-06-20} } The eagle eye is back: old and new backdoors from APT30
backspace NETEAGLE RCtrl RHttpCtrl APT 30
2020SecureworksSecureWorks
@online{secureworks:2020:bronze:f4862d1, author = {SecureWorks}, title = {{BRONZE GENEVA}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/bronze-geneva}, language = {English}, urldate = {2020-05-23} } BRONZE GENEVA
backspace Naikon
2015-04FireEyeFireEye
@techreport{fireeye:201504:apt30:0129bf7, author = {FireEye}, title = {{APT30 AND THE MECHANICS OF A LONG-RUNNING CYBER ESPIONAGE OPERATION}}, date = {2015-04}, institution = {FireEye}, url = {https://www2.fireeye.com/rs/fireye/images/rpt-apt30.pdf}, language = {English}, urldate = {2020-01-07} } APT30 AND THE MECHANICS OF A LONG-RUNNING CYBER ESPIONAGE OPERATION
BACKBEND backspace CREAMSICLE FLASHFLOOD GEMCUTTER MILKMAID Naikon NETEAGLE ORANGEADE SHIPSHAPE SPACESHIP SslMM Sys10 WinMM xsPlus APT 30
Yara Rules
[TLP:WHITE] win_backspace_auto (20220411 | Detects win.backspace.)
rule win_backspace_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.backspace."
        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.backspace"
        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 = { ff750c 8d85fcfeffff 50 e8???????? 83c410 8d85fcfeffff 6a00 }
            // n = 7, score = 100
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   8d85fcfeffff         | lea                 eax, dword ptr [ebp - 0x104]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   8d85fcfeffff         | lea                 eax, dword ptr [ebp - 0x104]
            //   6a00                 | push                0

        $sequence_1 = { 7407 50 ff15???????? 6a32 891d???????? 891d???????? }
            // n = 6, score = 100
            //   7407                 | je                  9
            //   50                   | push                eax
            //   ff15????????         |                     
            //   6a32                 | push                0x32
            //   891d????????         |                     
            //   891d????????         |                     

        $sequence_2 = { 57 ff15???????? 83f8ff 7428 85c0 7406 03f0 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   ff15????????         |                     
            //   83f8ff               | cmp                 eax, -1
            //   7428                 | je                  0x2a
            //   85c0                 | test                eax, eax
            //   7406                 | je                  8
            //   03f0                 | add                 esi, eax

        $sequence_3 = { 57 56 68???????? ff7508 6a50 68???????? e8???????? }
            // n = 7, score = 100
            //   57                   | push                edi
            //   56                   | push                esi
            //   68????????           |                     
            //   ff7508               | push                dword ptr [ebp + 8]
            //   6a50                 | push                0x50
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_4 = { 50 e8???????? ff750c 8d85fcfeffff ff7508 50 8d85f8fdffff }
            // n = 7, score = 100
            //   50                   | push                eax
            //   e8????????           |                     
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   8d85fcfeffff         | lea                 eax, dword ptr [ebp - 0x104]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   50                   | push                eax
            //   8d85f8fdffff         | lea                 eax, dword ptr [ebp - 0x208]

        $sequence_5 = { 6801800000 ffd6 8b2d???????? 6a28 }
            // n = 4, score = 100
            //   6801800000           | push                0x8001
            //   ffd6                 | call                esi
            //   8b2d????????         |                     
            //   6a28                 | push                0x28

        $sequence_6 = { 0010 41 3b4c2408 7cec c3 55 8bec }
            // n = 7, score = 100
            //   0010                 | add                 byte ptr [eax], dl
            //   41                   | inc                 ecx
            //   3b4c2408             | cmp                 ecx, dword ptr [esp + 8]
            //   7cec                 | jl                  0xffffffee
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp

        $sequence_7 = { 50 e8???????? 8b35???????? 6a5c ff35???????? }
            // n = 5, score = 100
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b35????????         |                     
            //   6a5c                 | push                0x5c
            //   ff35????????         |                     

        $sequence_8 = { 8ac8 8b45f8 fec9 888884ae4000 40 8945f8 8a840574ffffff }
            // n = 7, score = 100
            //   8ac8                 | mov                 cl, al
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   fec9                 | dec                 cl
            //   888884ae4000         | mov                 byte ptr [eax + 0x40ae84], cl
            //   40                   | inc                 eax
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8a840574ffffff       | mov                 al, byte ptr [ebp + eax - 0x8c]

        $sequence_9 = { e8???????? a1???????? 68???????? 69c00c020000 05???????? }
            // n = 5, score = 100
            //   e8????????           |                     
            //   a1????????           |                     
            //   68????????           |                     
            //   69c00c020000         | imul                eax, eax, 0x20c
            //   05????????           |                     

    condition:
        7 of them and filesize < 131072
}
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