SYMBOLCOMMON_NAMEaka. SYNONYMS
win.whitebird (Back to overview)

WhiteBird


According to Dr.Web, WhiteBird is a backdoor written in C++ and designed to operate in both 32-bit and 64-bit Microsoft Windows operating systems. The configuration is encrypted with a single byte XOR key. An interesting feature is that the malware can be restricted to operate only within certain "working_hours" with a granularity of one minute.

References
2020-09-25Dr.WebDr.Web
@techreport{drweb:20200925:spear:aeadfac, author = {Dr.Web}, title = {{Spear phishing campaigns threaten Russian fuel and energy companies}}, date = {2020-09-25}, institution = {Dr.Web}, url = {https://st.drweb.com/static/new-www/news/2020/september/tek_rf_article_en.pdf}, language = {English}, urldate = {2020-10-02} } Spear phishing campaigns threaten Russian fuel and energy companies
WhiteBird
2020-07-20Dr.WebDr.Web
@techreport{drweb:20200720:study:442ba99, author = {Dr.Web}, title = {{Study of the APT attacks on state institutions in Kazakhstan and Kyrgyzstan}}, date = {2020-07-20}, institution = {Dr.Web}, url = {https://st.drweb.com/static/new-www/news/2020/july/Study_of_the_APT_attacks_on_state_institutions_in_Kazakhstan_and_Kyrgyzstan_en.pdf}, language = {English}, urldate = {2020-10-02} } Study of the APT attacks on state institutions in Kazakhstan and Kyrgyzstan
Microcin Mirage PlugX WhiteBird
Yara Rules
[TLP:WHITE] win_whitebird_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_whitebird_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.whitebird"
        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 = { 8a4302 84c0 7408 3c01 7404 }
            // n = 5, score = 300
            //   8a4302               | mov                 al, byte ptr [ebx + 2]
            //   84c0                 | test                al, al
            //   7408                 | je                  0xa
            //   3c01                 | cmp                 al, 1
            //   7404                 | je                  6

        $sequence_1 = { eb09 80f92f 0f95c1 80c13f }
            // n = 4, score = 300
            //   eb09                 | jmp                 0xb
            //   80f92f               | cmp                 cl, 0x2f
            //   0f95c1               | setne               cl
            //   80c13f               | add                 cl, 0x3f

        $sequence_2 = { 8a4301 3c01 7404 3c02 }
            // n = 4, score = 300
            //   8a4301               | mov                 al, byte ptr [ebx + 1]
            //   3c01                 | cmp                 al, 1
            //   7404                 | je                  6
            //   3c02                 | cmp                 al, 2

        $sequence_3 = { 488905???????? 488b4110 488905???????? 8b4118 488bcd 8905???????? }
            // n = 6, score = 200
            //   488905????????       |                     
            //   488b4110             | mov                 eax, 0x80000
            //   488905????????       |                     
            //   8b4118               | dec                 eax
            //   488bcd               | mov                 eax, dword ptr [ecx + 0x10]
            //   8905????????         |                     

        $sequence_4 = { ff15???????? b900000800 e8???????? 33d2 41b800000800 }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   b900000800           | mov                 ecx, 0x80000
            //   e8????????           |                     
            //   33d2                 | xor                 edx, edx
            //   41b800000800         | inc                 ecx

        $sequence_5 = { 33c9 ff15???????? 48898710020000 488d0d59a10000 }
            // n = 4, score = 200
            //   33c9                 | dec                 eax
            //   ff15????????         |                     
            //   48898710020000       | lea                 eax, [0xffffd981]
            //   488d0d59a10000       | dec                 eax

        $sequence_6 = { 488d4c2460 488bd7 e8???????? 4c8d055fb2ffff 488d4c2460 488bd7 e8???????? }
            // n = 7, score = 200
            //   488d4c2460           | dec                 esp
            //   488bd7               | mov                 eax, ebx
            //   e8????????           |                     
            //   4c8d055fb2ffff       | dec                 eax
            //   488d4c2460           | and                 dword ptr [esp + 0x28], 0
            //   488bd7               | and                 dword ptr [esp + 0x50], 0
            //   e8????????           |                     

        $sequence_7 = { 488d4c2420 33d2 4c8bc3 e8???????? 488364242800 8364245000 488d0581d9ffff }
            // n = 7, score = 200
            //   488d4c2420           | mov                 eax, dword ptr [ecx + 0x18]
            //   33d2                 | dec                 eax
            //   4c8bc3               | mov                 ecx, ebp
            //   e8????????           |                     
            //   488364242800         | dec                 eax
            //   8364245000           | lea                 ecx, [esp + 0x20]
            //   488d0581d9ffff       | xor                 edx, edx

        $sequence_8 = { 7f19 398df8feffff 7f11 398df4feffff 7f09 }
            // n = 5, score = 100
            //   7f19                 | cmp                 al, 1
            //   398df8feffff         | mov                 al, byte ptr [ebx + 2]
            //   7f11                 | test                al, al
            //   398df4feffff         | je                  0xa
            //   7f09                 | cmp                 al, 1

        $sequence_9 = { 33c0 8bfe ab 8d45f8 50 6a02 68???????? }
            // n = 7, score = 100
            //   33c0                 | jne                 6
            //   8bfe                 | xor                 eax, eax
            //   ab                   | jmp                 0x53
            //   8d45f8               | lea                 eax, [ebp - 0x230]
            //   50                   | push                eax
            //   6a02                 | jg                  0x1b
            //   68????????           |                     

        $sequence_10 = { 8bf0 83feff 7504 33c0 eb4d 8d85d0fdffff 50 }
            // n = 7, score = 100
            //   8bf0                 | je                  0xa
            //   83feff               | cmp                 al, 1
            //   7504                 | je                  0xa
            //   33c0                 | cmp                 al, 2
            //   eb4d                 | mov                 al, byte ptr [ebx + 2]
            //   8d85d0fdffff         | test                al, al
            //   50                   | je                  0xa

        $sequence_11 = { 85c9 7413 8bc1 8d5001 8a08 }
            // n = 5, score = 100
            //   85c9                 | cmp                 dword ptr [ebp - 0x108], ecx
            //   7413                 | jg                  0x13
            //   8bc1                 | cmp                 dword ptr [ebp - 0x10c], ecx
            //   8d5001               | jg                  0x13
            //   8a08                 | mov                 byte ptr [ebp - 0x12], 0x44

        $sequence_12 = { c645ee44 c645ef65 c645f06c c645f165 c645f274 c645f365 c645f44b }
            // n = 7, score = 100
            //   c645ee44             | je                  0xa
            //   c645ef65             | mov                 al, byte ptr [ebx + 1]
            //   c645f06c             | cmp                 al, 1
            //   c645f165             | je                  6
            //   c645f274             | cmp                 al, 2
            //   c645f365             | mov                 esi, eax
            //   c645f44b             | cmp                 esi, -1

    condition:
        7 of them and filesize < 139264
}
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