SYMBOLCOMMON_NAMEaka. SYNONYMS
win.carrotbat (Back to overview)

CarrotBat


There is no description at this point.

References
2020-01-23Palo Alto Networks Unit 42Adrian McCabe, Unit42
@online{mccabe:20200123:fractured:399ff15, author = {Adrian McCabe and Unit42}, title = {{The Fractured Statue Campaign: U.S. Government Targeted in Spear-Phishing Attacks}}, date = {2020-01-23}, organization = {Palo Alto Networks Unit 42}, url = {https://unit42.paloaltonetworks.com/the-fractured-statue-campaign-u-s-government-targeted-in-spear-phishing-attacks/}, language = {English}, urldate = {2020-01-26} } The Fractured Statue Campaign: U.S. Government Targeted in Spear-Phishing Attacks
CARROTBALL CarrotBat Syscon
2019-11-29Palo Alto Networks Unit 42Josh Grunzweig, Kyle Wilhoit
@online{grunzweig:20191129:fractured:65257b7, author = {Josh Grunzweig and Kyle Wilhoit}, title = {{The Fractured Block Campaign: CARROTBAT Used to Deliver Malware Targeting Southeast Asia}}, date = {2019-11-29}, organization = {Palo Alto Networks Unit 42}, url = {https://unit42.paloaltonetworks.com/unit42-the-fractured-block-campaign-carrotbat-malware-used-to-deliver-malware-targeting-southeast-asia/}, language = {English}, urldate = {2020-01-12} } The Fractured Block Campaign: CARROTBAT Used to Deliver Malware Targeting Southeast Asia
CarrotBat
Yara Rules
[TLP:WHITE] win_carrotbat_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_carrotbat_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.carrotbat"
        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 = { 8b149520ee4000 83e61f c1e606 f644320480 7416 }
            // n = 5, score = 100
            //   8b149520ee4000       | mov                 edx, dword ptr [edx*4 + 0x40ee20]
            //   83e61f               | and                 esi, 0x1f
            //   c1e606               | shl                 esi, 6
            //   f644320480           | test                byte ptr [edx + esi + 4], 0x80
            //   7416                 | je                  0x18

        $sequence_1 = { 59 83f83c 762a 56 e8???????? 8d044564e24000 }
            // n = 6, score = 100
            //   59                   | pop                 ecx
            //   83f83c               | cmp                 eax, 0x3c
            //   762a                 | jbe                 0x2c
            //   56                   | push                esi
            //   e8????????           |                     
            //   8d044564e24000       | lea                 eax, [eax*2 + 0x40e264]

        $sequence_2 = { 8bf8 c0c407 6af8 f9 0fbae61d }
            // n = 5, score = 100
            //   8bf8                 | mov                 edi, eax
            //   c0c407               | rol                 ah, 7
            //   6af8                 | push                -8
            //   f9                   | stc                 
            //   0fbae61d             | bt                  esi, 0x1d

        $sequence_3 = { 83f908 7229 f3a5 ff249520634000 }
            // n = 4, score = 100
            //   83f908               | cmp                 ecx, 8
            //   7229                 | jb                  0x2b
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   ff249520634000       | jmp                 dword ptr [edx*4 + 0x406320]

        $sequence_4 = { c9 60 9c ff742424 c22800 c744241402000000 }
            // n = 6, score = 100
            //   c9                   | leave               
            //   60                   | pushal              
            //   9c                   | pushfd              
            //   ff742424             | push                dword ptr [esp + 0x24]
            //   c22800               | ret                 0x28
            //   c744241402000000     | mov                 dword ptr [esp + 0x14], 2

        $sequence_5 = { 56 e8???????? 8d044564e24000 8bc8 2bce }
            // n = 5, score = 100
            //   56                   | push                esi
            //   e8????????           |                     
            //   8d044564e24000       | lea                 eax, [eax*2 + 0x40e264]
            //   8bc8                 | mov                 ecx, eax
            //   2bce                 | sub                 ecx, esi

        $sequence_6 = { 8b0c8d20ee4000 83e01f c1e006 f644080401 74cd 8b0408 5d }
            // n = 7, score = 100
            //   8b0c8d20ee4000       | mov                 ecx, dword ptr [ecx*4 + 0x40ee20]
            //   83e01f               | and                 eax, 0x1f
            //   c1e006               | shl                 eax, 6
            //   f644080401           | test                byte ptr [eax + ecx + 4], 1
            //   74cd                 | je                  0xffffffcf
            //   8b0408               | mov                 eax, dword ptr [eax + ecx]
            //   5d                   | pop                 ebp

        $sequence_7 = { 660fa5f7 8bf8 c0c407 6af8 f9 }
            // n = 5, score = 100
            //   660fa5f7             | shld                di, si, cl
            //   8bf8                 | mov                 edi, eax
            //   c0c407               | rol                 ah, 7
            //   6af8                 | push                -8
            //   f9                   | stc                 

        $sequence_8 = { f3a5 ff249520634000 8bc7 ba03000000 }
            // n = 4, score = 100
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   ff249520634000       | jmp                 dword ptr [edx*4 + 0x406320]
            //   8bc7                 | mov                 eax, edi
            //   ba03000000           | mov                 edx, 3

        $sequence_9 = { 8f442434 9c 57 ff74243c c24000 }
            // n = 5, score = 100
            //   8f442434             | pop                 dword ptr [esp + 0x34]
            //   9c                   | pushfd              
            //   57                   | push                edi
            //   ff74243c             | push                dword ptr [esp + 0x3c]
            //   c24000               | ret                 0x40

    condition:
        7 of them and filesize < 360448
}
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