SYMBOLCOMMON_NAMEaka. SYNONYMS
win.windealer (Back to overview)

WinDealer


Information stealer used by threat actor LuoYu.

References
2022-06-30BlackberryThe BlackBerry Research & Intelligence Team
@online{team:20220630:threat:555a16b, author = {The BlackBerry Research & Intelligence Team}, title = {{Threat Thursday: China-Based APT Plays Auto-Updater Card to Deliver WinDealer Malware}}, date = {2022-06-30}, organization = {Blackberry}, url = {https://blogs.blackberry.com/en/2022/06/threat-thursday-china-based-apt-plays-auto-updater-card-to-deliver-windealer-malware}, language = {English}, urldate = {2022-07-18} } Threat Thursday: China-Based APT Plays Auto-Updater Card to Deliver WinDealer Malware
WinDealer Red Nue
2022-06-02Kaspersky LabsGReAT
@online{great:20220602:windealer:a54c8c9, author = {GReAT}, title = {{WinDealer dealing on the side}}, date = {2022-06-02}, organization = {Kaspersky Labs}, url = {https://securelist.com/windealer-dealing-on-the-side/105946}, language = {English}, urldate = {2022-07-25} } WinDealer dealing on the side
WinDealer Red Nue
2022-06-02Kaspersky LabsGReAT
@online{great:20220602:windealer:04ad2d0, author = {GReAT}, title = {{WinDealer dealing on the side}}, date = {2022-06-02}, organization = {Kaspersky Labs}, url = {https://securelist.com/windealer-dealing-on-the-side/105946/}, language = {English}, urldate = {2022-06-04} } WinDealer dealing on the side
WinDealer
2021-10-26JPCERT/CCYuma Masubuchi
@online{masubuchi:20211026:malware:44bce23, author = {Yuma Masubuchi}, title = {{Malware WinDealer used by LuoYu Attack Group}}, date = {2021-10-26}, organization = {JPCERT/CC}, url = {https://blogs.jpcert.or.jp/en/2021/10/windealer.html}, language = {English}, urldate = {2021-11-03} } Malware WinDealer used by LuoYu Attack Group
WinDealer Red Nue
2021-01-27TEAMT5Shui, Leon
@techreport{shui:20210127:luoyu:32b7965, author = {Shui and Leon}, title = {{LuoYu: The eavesdropper sneaking in multiple platforms}}, date = {2021-01-27}, institution = {TEAMT5}, url = {https://jsac.jpcert.or.jp/archive/2021/pdf/JSAC2021_301_shui-leon_en.pdf}, language = {English}, urldate = {2021-11-03} } LuoYu: The eavesdropper sneaking in multiple platforms
systemd WinDealer Red Nue
Yara Rules
[TLP:WHITE] win_windealer_auto (20220516 | Detects win.windealer.)
rule win_windealer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.windealer."
        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.windealer"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 56 57 68da070000 e8???????? }
            // n = 4, score = 800
            //   56                   | push                esi
            //   57                   | push                edi
            //   68da070000           | push                0x7da
            //   e8????????           |                     

        $sequence_1 = { 6a00 ff15???????? 85c0 7407 50 ff15???????? 6a01 }
            // n = 7, score = 800
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9
            //   50                   | push                eax
            //   ff15????????         |                     
            //   6a01                 | push                1

        $sequence_2 = { 8b4d08 668b91d2070000 8a89d0070000 52 }
            // n = 4, score = 800
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   668b91d2070000       | mov                 dx, word ptr [ecx + 0x7d2]
            //   8a89d0070000         | mov                 cl, byte ptr [ecx + 0x7d0]
            //   52                   | push                edx

        $sequence_3 = { ff15???????? 85c0 7407 50 ff15???????? 6a01 }
            // n = 6, score = 800
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9
            //   50                   | push                eax
            //   ff15????????         |                     
            //   6a01                 | push                1

        $sequence_4 = { 50 56 e8???????? 83c410 8b4610 }
            // n = 5, score = 800
            //   50                   | push                eax
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   8b4610               | mov                 eax, dword ptr [esi + 0x10]

        $sequence_5 = { 53 56 57 68da070000 }
            // n = 4, score = 800
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   68da070000           | push                0x7da

        $sequence_6 = { 6a01 50 56 e8???????? 83c410 8bc7 }
            // n = 6, score = 800
            //   6a01                 | push                1
            //   50                   | push                eax
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   8bc7                 | mov                 eax, edi

        $sequence_7 = { 668b91d2070000 8a89d0070000 52 51 }
            // n = 4, score = 800
            //   668b91d2070000       | mov                 dx, word ptr [ecx + 0x7d2]
            //   8a89d0070000         | mov                 cl, byte ptr [ecx + 0x7d0]
            //   52                   | push                edx
            //   51                   | push                ecx

        $sequence_8 = { 50 56 e8???????? 83c410 8b4618 }
            // n = 5, score = 800
            //   50                   | push                eax
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   8b4618               | mov                 eax, dword ptr [esi + 0x18]

        $sequence_9 = { 8b4d08 668b91d2070000 8a89d0070000 52 51 }
            // n = 5, score = 800
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   668b91d2070000       | mov                 dx, word ptr [ecx + 0x7d2]
            //   8a89d0070000         | mov                 cl, byte ptr [ecx + 0x7d0]
            //   52                   | push                edx
            //   51                   | push                ecx

    condition:
        7 of them and filesize < 770048
}
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