SYMBOLCOMMON_NAMEaka. SYNONYMS
win.komprogo (Back to overview)

KOMPROGO

aka: Splinter RAT

Actor(s): APT32


KOMPROGO is a signature backdoor used by APT32 that is capable of process, file, and registry management, Creating a reverse shell, running WMI queries, retrieving information about the infected system.

References
2018-11-02CylanceCylance
@techreport{cylance:20181102:spyrats:67888b3, author = {Cylance}, title = {{The SpyRATs of OceanLotus}}, date = {2018-11-02}, institution = {Cylance}, url = {https://www.cylance.com/content/dam/cylance-web/en-us/resources/knowledge-center/resource-library/reports/SpyRATsofOceanLotusMalwareWhitePaper.pdf}, language = {English}, urldate = {2020-01-10} } The SpyRATs of OceanLotus
KOMPROGO PHOREAL
2017-05-14FireEyeNick Carr
@online{carr:20170514:cyber:0ac720f, author = {Nick Carr}, title = {{Cyber Espionage is Alive and Well: APT32 and the Threat to Global Corporations}}, date = {2017-05-14}, organization = {FireEye}, url = {https://www.fireeye.com/blog/threat-research/2017/05/cyber-espionage-apt32.html}, language = {English}, urldate = {2019-12-20} } Cyber Espionage is Alive and Well: APT32 and the Threat to Global Corporations
OceanLotus Cuegoe KOMPROGO SOUNDBITE APT32
2017FireEyeBart Inglot, Byrne Ghavalas
@online{inglot:2017:attacker:3af6c23, author = {Bart Inglot and Byrne Ghavalas}, title = {{ATTACKER ANTICS: Illustrations of Ingenuity}}, date = {2017}, organization = {FireEye}, url = {https://ruxcon.org.au/assets/2017/slides/bart-RuxCon-Presentation.pptx}, language = {English}, urldate = {2020-01-08} } ATTACKER ANTICS: Illustrations of Ingenuity
KOMPROGO SOUNDBITE
2015-12-08SymantecSymantec
@online{symantec:20151208:backdoorkomprogo:786eb9b, author = {Symantec}, title = {{Backdoor.Komprogo}}, date = {2015-12-08}, organization = {Symantec}, url = {https://www.symantec.com/security_response/earthlink_writeup.jsp?docid=2015-120808-5327-99}, language = {English}, urldate = {2019-11-27} } Backdoor.Komprogo
KOMPROGO
Yara Rules
[TLP:WHITE] win_komprogo_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_komprogo_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.komprogo"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 899664830300 8d86d0950300 8986bb6a0000 8d8e10800300 898e74830300 }
            // n = 5, score = 100
            //   899664830300         | mov                 dword ptr [esi + 0x38364], edx
            //   8d86d0950300         | lea                 eax, [esi + 0x395d0]
            //   8986bb6a0000         | mov                 dword ptr [esi + 0x6abb], eax
            //   8d8e10800300         | lea                 ecx, [esi + 0x38010]
            //   898e74830300         | mov                 dword ptr [esi + 0x38374], ecx

        $sequence_1 = { 84c0 0f84a7010000 8d863ca40300 898638a40300 8d8674720300 }
            // n = 5, score = 100
            //   84c0                 | test                al, al
            //   0f84a7010000         | je                  0x1ad
            //   8d863ca40300         | lea                 eax, [esi + 0x3a43c]
            //   898638a40300         | mov                 dword ptr [esi + 0x3a438], eax
            //   8d8674720300         | lea                 eax, [esi + 0x37274]

        $sequence_2 = { 8d8e62950100 898e28d40100 8d9641e50200 899669ed0200 8d8efcc40300 898e20c50300 8d8ea8e90300 }
            // n = 7, score = 100
            //   8d8e62950100         | lea                 ecx, [esi + 0x19562]
            //   898e28d40100         | mov                 dword ptr [esi + 0x1d428], ecx
            //   8d9641e50200         | lea                 edx, [esi + 0x2e541]
            //   899669ed0200         | mov                 dword ptr [esi + 0x2ed69], edx
            //   8d8efcc40300         | lea                 ecx, [esi + 0x3c4fc]
            //   898e20c50300         | mov                 dword ptr [esi + 0x3c520], ecx
            //   8d8ea8e90300         | lea                 ecx, [esi + 0x3e9a8]

        $sequence_3 = { 8d8e50710300 8d9640950300 51 8b4dfc 8d86e0d00300 89966d450300 e8???????? }
            // n = 7, score = 100
            //   8d8e50710300         | lea                 ecx, [esi + 0x37150]
            //   8d9640950300         | lea                 edx, [esi + 0x39540]
            //   51                   | push                ecx
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8d86e0d00300         | lea                 eax, [esi + 0x3d0e0]
            //   89966d450300         | mov                 dword ptr [esi + 0x3456d], edx
            //   e8????????           |                     

        $sequence_4 = { 56 ff15???????? 85c0 7e07 b001 5e 8be5 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7e07                 | jle                 9
            //   b001                 | mov                 al, 1
            //   5e                   | pop                 esi
            //   8be5                 | mov                 esp, ebp

        $sequence_5 = { e8???????? 83c404 84c0 0f84f0100000 8d8e5c770300 898e60e80300 8d9654770300 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   84c0                 | test                al, al
            //   0f84f0100000         | je                  0x10f6
            //   8d8e5c770300         | lea                 ecx, [esi + 0x3775c]
            //   898e60e80300         | mov                 dword ptr [esi + 0x3e860], ecx
            //   8d9654770300         | lea                 edx, [esi + 0x37754]

        $sequence_6 = { 56 ff15???????? 4b 8d744602 75f2 56 8d85e4fdffff }
            // n = 7, score = 100
            //   56                   | push                esi
            //   ff15????????         |                     
            //   4b                   | dec                 ebx
            //   8d744602             | lea                 esi, [esi + eax*2 + 2]
            //   75f2                 | jne                 0xfffffff4
            //   56                   | push                esi
            //   8d85e4fdffff         | lea                 eax, [ebp - 0x21c]

        $sequence_7 = { 57 ff15???????? 881d???????? 84db 7559 be???????? bf18000000 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   ff15????????         |                     
            //   881d????????         |                     
            //   84db                 | test                bl, bl
            //   7559                 | jne                 0x5b
            //   be????????           |                     
            //   bf18000000           | mov                 edi, 0x18

        $sequence_8 = { 51 8b4dfc 8d8642ca0300 899644d50100 }
            // n = 4, score = 100
            //   51                   | push                ecx
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8d8642ca0300         | lea                 eax, [esi + 0x3ca42]
            //   899644d50100         | mov                 dword ptr [esi + 0x1d544], edx

        $sequence_9 = { 84c0 0f846e060000 8d8e6c710300 51 8b4dfc 8d86fcd20300 }
            // n = 6, score = 100
            //   84c0                 | test                al, al
            //   0f846e060000         | je                  0x674
            //   8d8e6c710300         | lea                 ecx, [esi + 0x3716c]
            //   51                   | push                ecx
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8d86fcd20300         | lea                 eax, [esi + 0x3d2fc]

    condition:
        7 of them and filesize < 1045504
}
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