SYMBOLCOMMON_NAMEaka. SYNONYMS
win.flagpro (Back to overview)

Flagpro

aka: BUSYICE

Actor(s): BlackTech


There is no description at this point.

References
2022-01-25Trend MicroHara Hiroaki
@techreport{hiroaki:20220125:ambiguously:a846748, author = {Hara Hiroaki}, title = {{Ambiguously Black: The Current State of Earth Hundun's Arsenal}}, date = {2022-01-25}, institution = {Trend Micro}, url = {https://jsac.jpcert.or.jp/archive/2022/pdf/JSAC2022_8_hara_en.pdf}, language = {English}, urldate = {2022-04-04} } Ambiguously Black: The Current State of Earth Hundun's Arsenal
Flagpro SPIDERPIG RAT
2021-12-28NTTHiroki Hada
@online{hada:20211228:flagpro:1263fb7, author = {Hiroki Hada}, title = {{Flagpro: The new malware used by BlackTech}}, date = {2021-12-28}, organization = {NTT}, url = {https://insight-jp.nttsecurity.com/post/102hf3q/flagpro-the-new-malware-used-by-blacktech}, language = {English}, urldate = {2021-12-31} } Flagpro: The new malware used by BlackTech
Flagpro
2021-12-12Cyber And Ramen blogMike R
@online{r:20211212:more:9f9c952, author = {Mike R}, title = {{More Flagpro, More Problems}}, date = {2021-12-12}, organization = {Cyber And Ramen blog}, url = {https://cyberandramen.net/2021/12/12/more-flagpro-more-problems/}, language = {English}, urldate = {2022-04-05} } More Flagpro, More Problems
Flagpro
2021-10-08NTTHiroki Hada, Rintaro Koike, Fumio Ozawa
@online{hada:20211008:malware:bfcbd46, author = {Hiroki Hada and Rintaro Koike and Fumio Ozawa}, title = {{Malware Flagpro used by targeted attack group BlackTech}}, date = {2021-10-08}, organization = {NTT}, url = {https://insight-jp.nttsecurity.com/post/102h7vx/blacktechflagpro}, language = {Japanese}, urldate = {2021-10-24} } Malware Flagpro used by targeted attack group BlackTech
Flagpro
2021-10-07VB LocalhostSveva Vittoria Scenarelli, Adam Prescott
@techreport{scenarelli:20211007:back:d7e0e71, author = {Sveva Vittoria Scenarelli and Adam Prescott}, title = {{Back to Black(Tech): an analysis of recent BlackTech operations and an open directory full of exploits}}, date = {2021-10-07}, institution = {VB Localhost}, url = {https://vblocalhost.com/uploads/VB2021-50.pdf}, language = {English}, urldate = {2022-06-29} } Back to Black(Tech): an analysis of recent BlackTech operations and an open directory full of exploits
Flagpro
Yara Rules
[TLP:WHITE] win_flagpro_auto (20220516 | Detects win.flagpro.)
rule win_flagpro_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.flagpro."
        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.flagpro"
        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 = { 8d542438 52 50 8b8100010000 ffd0 3bc3 }
            // n = 6, score = 100
            //   8d542438             | lea                 edx, [esp + 0x38]
            //   52                   | push                edx
            //   50                   | push                eax
            //   8b8100010000         | mov                 eax, dword ptr [ecx + 0x100]
            //   ffd0                 | call                eax
            //   3bc3                 | cmp                 eax, ebx

        $sequence_1 = { 56 c784249c45010001000000 e8???????? 83c404 6a01 }
            // n = 5, score = 100
            //   56                   | push                esi
            //   c784249c45010001000000     | mov    dword ptr [esp + 0x1459c], 1
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   6a01                 | push                1

        $sequence_2 = { 80f958 770d 0fbec2 0fb680e0a44100 83e00f 8b8dc0fdffff 6bc009 }
            // n = 7, score = 100
            //   80f958               | cmp                 cl, 0x58
            //   770d                 | ja                  0xf
            //   0fbec2               | movsx               eax, dl
            //   0fb680e0a44100       | movzx               eax, byte ptr [eax + 0x41a4e0]
            //   83e00f               | and                 eax, 0xf
            //   8b8dc0fdffff         | mov                 ecx, dword ptr [ebp - 0x240]
            //   6bc009               | imul                eax, eax, 9

        $sequence_3 = { 751e 8d04f550d84100 8938 68a00f0000 ff30 83c718 }
            // n = 6, score = 100
            //   751e                 | jne                 0x20
            //   8d04f550d84100       | lea                 eax, [esi*8 + 0x41d850]
            //   8938                 | mov                 dword ptr [eax], edi
            //   68a00f0000           | push                0xfa0
            //   ff30                 | push                dword ptr [eax]
            //   83c718               | add                 edi, 0x18

        $sequence_4 = { 40 3bf8 0f8312010000 8bcf d1e9 }
            // n = 5, score = 100
            //   40                   | inc                 eax
            //   3bf8                 | cmp                 edi, eax
            //   0f8312010000         | jae                 0x118
            //   8bcf                 | mov                 ecx, edi
            //   d1e9                 | shr                 ecx, 1

        $sequence_5 = { e8???????? 8b4c241c 8d8c0b00040000 8bc1 8d6801 8a10 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8b4c241c             | mov                 ecx, dword ptr [esp + 0x1c]
            //   8d8c0b00040000       | lea                 ecx, [ebx + ecx + 0x400]
            //   8bc1                 | mov                 eax, ecx
            //   8d6801               | lea                 ebp, [eax + 1]
            //   8a10                 | mov                 dl, byte ptr [eax]

        $sequence_6 = { 396e18 7205 8b4604 eb03 8d4604 8b6c2424 }
            // n = 6, score = 100
            //   396e18               | cmp                 dword ptr [esi + 0x18], ebp
            //   7205                 | jb                  7
            //   8b4604               | mov                 eax, dword ptr [esi + 4]
            //   eb03                 | jmp                 5
            //   8d4604               | lea                 eax, [esi + 4]
            //   8b6c2424             | mov                 ebp, dword ptr [esp + 0x24]

        $sequence_7 = { 6603c9 6603c9 66898c44300c0000 40 83f825 7ce4 }
            // n = 6, score = 100
            //   6603c9               | add                 cx, cx
            //   6603c9               | add                 cx, cx
            //   66898c44300c0000     | mov                 word ptr [esp + eax*2 + 0xc30], cx
            //   40                   | inc                 eax
            //   83f825               | cmp                 eax, 0x25
            //   7ce4                 | jl                  0xffffffe6

        $sequence_8 = { ffd2 47 3b7c243c 897c2450 0f8c03feffff e9???????? 8b44241c }
            // n = 7, score = 100
            //   ffd2                 | call                edx
            //   47                   | inc                 edi
            //   3b7c243c             | cmp                 edi, dword ptr [esp + 0x3c]
            //   897c2450             | mov                 dword ptr [esp + 0x50], edi
            //   0f8c03feffff         | jl                  0xfffffe09
            //   e9????????           |                     
            //   8b44241c             | mov                 eax, dword ptr [esp + 0x1c]

        $sequence_9 = { 897c242c e8???????? 83c404 3bc7 7408 8d4c2410 }
            // n = 6, score = 100
            //   897c242c             | mov                 dword ptr [esp + 0x2c], edi
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   3bc7                 | cmp                 eax, edi
            //   7408                 | je                  0xa
            //   8d4c2410             | lea                 ecx, [esp + 0x10]

    condition:
        7 of them and filesize < 1411072
}
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