SYMBOLCOMMON_NAMEaka. SYNONYMS
win.blackcoffee (Back to overview)

BLACKCOFFEE

aka: PNGRAT, gresim, ZoxPNG

Actor(s): APT41, Aurora Panda, Leviathan


a backdoor that obfuscates its communications as normal traffic to legitimate websites such as Github and Microsoft's Technet portal.

References
2020-01-29nao_sec blognao_sec
@online{naosec:20200129:overhead:ec0aeb5, author = {nao_sec}, title = {{An Overhead View of the Royal Road}}, date = {2020-01-29}, organization = {nao_sec blog}, url = {https://nao-sec.org/2020/01/an-overhead-view-of-the-royal-road.html}, language = {English}, urldate = {2020-02-03} } An Overhead View of the Royal Road
BLACKCOFFEE Cotx RAT Datper DDKONG Derusbi Icefog Korlia NewCore RAT PLAINTEE Poison Ivy Sisfader
2020SecureworksSecureWorks
@online{secureworks:2020:bronze:65ecf8a, author = {SecureWorks}, title = {{BRONZE KEYSTONE}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/bronze-keystone}, language = {English}, urldate = {2020-05-23} } BRONZE KEYSTONE
9002 RAT BLACKCOFFEE DeputyDog Derusbi HiKit PlugX Poison Ivy ZXShell APT17
2020SecureworksSecureWorks
@online{secureworks:2020:bronze:e8ad4fb, author = {SecureWorks}, title = {{BRONZE MOHAWK}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/bronze-mohawk}, language = {English}, urldate = {2020-05-23} } BRONZE MOHAWK
AIRBREAK scanbox BLACKCOFFEE CHINACHOPPER Cobalt Strike Derusbi homefry murkytop SeDll APT40
2019-09-23MITREMITRE ATT&CK
@online{attck:20190923:apt41:63b9ff7, author = {MITRE ATT&CK}, title = {{APT41}}, date = {2019-09-23}, organization = {MITRE}, url = {https://attack.mitre.org/groups/G0096}, language = {English}, urldate = {2022-08-30} } APT41
Derusbi MESSAGETAP Winnti ASPXSpy BLACKCOFFEE CHINACHOPPER Cobalt Strike Derusbi Empire Downloader Ghost RAT MimiKatz NjRAT PlugX ShadowPad Winnti ZXShell APT41
2019-07-24IntrusiontruthIntrusiontruth
@online{intrusiontruth:20190724:apt17:6b9a666, author = {Intrusiontruth}, title = {{APT17 is run by the Jinan bureau of the Chinese Ministry of State Security}}, date = {2019-07-24}, organization = {Intrusiontruth}, url = {https://intrusiontruth.wordpress.com/2019/07/24/apt17-is-run-by-the-jinan-bureau-of-the-chinese-ministry-of-state-security/}, language = {English}, urldate = {2020-04-21} } APT17 is run by the Jinan bureau of the Chinese Ministry of State Security
BLACKCOFFEE
2019MITREMITRE ATT&CK
@online{attck:2019:tool:ebc79ce, author = {MITRE ATT&CK}, title = {{Tool description: BLACKCOFFEE}}, date = {2019}, organization = {MITRE}, url = {https://attack.mitre.org/software/S0069/}, language = {English}, urldate = {2019-12-20} } Tool description: BLACKCOFFEE
BLACKCOFFEE
2018-03-16FireEyeFireEye
@online{fireeye:20180316:suspected:2a77316, author = {FireEye}, title = {{Suspected Chinese Cyber Espionage Group (TEMP.Periscope) Targeting U.S. Engineering and Maritime Industries}}, date = {2018-03-16}, organization = {FireEye}, url = {https://www.fireeye.com/blog/threat-research/2018/03/suspected-chinese-espionage-group-targeting-maritime-and-engineering-industries.html}, language = {English}, urldate = {2019-12-20} } Suspected Chinese Cyber Espionage Group (TEMP.Periscope) Targeting U.S. Engineering and Maritime Industries
badflick BLACKCOFFEE CHINACHOPPER homefry murkytop SeDll APT40
2017-05-31MITREMITRE ATT&CK
@online{attck:20170531:apt17:ebee596, author = {MITRE ATT&CK}, title = {{APT17}}, date = {2017-05-31}, organization = {MITRE}, url = {https://attack.mitre.org/groups/G0025/}, language = {English}, urldate = {2022-07-05} } APT17
BLACKCOFFEE APT17
2017-05-31MITREMITRE ATT&CK
@online{attck:20170531:axiom:b181fdb, author = {MITRE ATT&CK}, title = {{Axiom}}, date = {2017-05-31}, organization = {MITRE}, url = {https://attack.mitre.org/groups/G0001/}, language = {English}, urldate = {2022-08-30} } Axiom
Derusbi 9002 RAT BLACKCOFFEE Derusbi Ghost RAT HiKit PlugX ZXShell APT17
2015-05-18Tetsuji Tanigawa
@online{tanigawa:20150518:tt:4cb29ea, author = {Tetsuji Tanigawa}, title = {{TT Malware Log}}, date = {2015-05-18}, url = {http://malware-log.hatenablog.com/entry/2015/05/18/000000_1}, language = {Japanese}, urldate = {2020-01-08} } TT Malware Log
BLACKCOFFEE
2015-05FireEyeFireEye
@techreport{fireeye:201505:hiding:8695fc2, author = {FireEye}, title = {{HIDING IN PLAIN SIGHT: FIREEYE AND MICROSOFT EXPOSE OBFUSCATION TACTIC}}, date = {2015-05}, institution = {FireEye}, url = {https://www2.fireeye.com/rs/fireye/images/APT17_Report.pdf}, language = {English}, urldate = {2019-12-19} } HIDING IN PLAIN SIGHT: FIREEYE AND MICROSOFT EXPOSE OBFUSCATION TACTIC
BLACKCOFFEE
2015-04-14Youtube (Kaspersky)Kris McConkey
@online{mcconkey:20150414:following:02e29b8, author = {Kris McConkey}, title = {{Following APT OpSec failures}}, date = {2015-04-14}, organization = {Youtube (Kaspersky)}, url = {https://www.youtube.com/watch?v=NFJqD-LcpIg}, language = {English}, urldate = {2022-08-30} } Following APT OpSec failures
BLACKCOFFEE Mangzamel APT17
2014-11NovettaNovetta
@techreport{novetta:201411:zoxpng:91e81c6, author = {Novetta}, title = {{ZoxPNG Analysis}}, date = {2014-11}, institution = {Novetta}, url = {http://www.novetta.com/wp-content/uploads/2014/11/ZoxPNG.pdf}, language = {English}, urldate = {2020-05-07} } ZoxPNG Analysis
BLACKCOFFEE
Yara Rules
[TLP:WHITE] win_blackcoffee_auto (20230808 | Detects win.blackcoffee.)
rule win_blackcoffee_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-12-06"
        version = "1"
        description = "Detects win.blackcoffee."
        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.blackcoffee"
        malpedia_rule_date = "20231130"
        malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351"
        malpedia_version = "20230808"
        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 = { 8d85b4feffff 50 ff75f8 ff15???????? 8b85b4feffff }
            // n = 5, score = 200
            //   8d85b4feffff         | lea                 eax, [ebp - 0x14c]
            //   50                   | push                eax
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     
            //   8b85b4feffff         | mov                 eax, dword ptr [ebp - 0x14c]

        $sequence_1 = { 8b35???????? 57 33ff 3bc7 7416 57 50 }
            // n = 7, score = 200
            //   8b35????????         |                     
            //   57                   | push                edi
            //   33ff                 | xor                 edi, edi
            //   3bc7                 | cmp                 eax, edi
            //   7416                 | je                  0x18
            //   57                   | push                edi
            //   50                   | push                eax

        $sequence_2 = { 8b45fc 83c424 8d44301a 6a1c 6a40 894508 ff15???????? }
            // n = 7, score = 200
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   83c424               | add                 esp, 0x24
            //   8d44301a             | lea                 eax, [eax + esi + 0x1a]
            //   6a1c                 | push                0x1c
            //   6a40                 | push                0x40
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   ff15????????         |                     

        $sequence_3 = { 890d???????? ebdb 89848a00c0e7ff a1???????? ff05???????? }
            // n = 5, score = 200
            //   890d????????         |                     
            //   ebdb                 | jmp                 0xffffffdd
            //   89848a00c0e7ff       | mov                 dword ptr [edx + ecx*4 - 0x184000], eax
            //   a1????????           |                     
            //   ff05????????         |                     

        $sequence_4 = { e8???????? ff36 e8???????? 83c00c 68444e4549 }
            // n = 5, score = 200
            //   e8????????           |                     
            //   ff36                 | push                dword ptr [esi]
            //   e8????????           |                     
            //   83c00c               | add                 eax, 0xc
            //   68444e4549           | push                0x49454e44

        $sequence_5 = { 8d856cffffff c7856cffffff94000000 50 ff15???????? 6a05 }
            // n = 5, score = 200
            //   8d856cffffff         | lea                 eax, [ebp - 0x94]
            //   c7856cffffff94000000     | mov    dword ptr [ebp - 0x94], 0x94
            //   50                   | push                eax
            //   ff15????????         |                     
            //   6a05                 | push                5

        $sequence_6 = { c20800 55 8bec 81ec98000000 56 57 }
            // n = 6, score = 200
            //   c20800               | ret                 8
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81ec98000000         | sub                 esp, 0x98
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_7 = { 899d30ffffff 66895df0 f3ab 8d7df2 6a0f }
            // n = 5, score = 200
            //   899d30ffffff         | mov                 dword ptr [ebp - 0xd0], ebx
            //   66895df0             | mov                 word ptr [ebp - 0x10], bx
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8d7df2               | lea                 edi, [ebp - 0xe]
            //   6a0f                 | push                0xf

        $sequence_8 = { 83c00c 0107 8b37 03f3 e8???????? 6854414449 }
            // n = 6, score = 200
            //   83c00c               | add                 eax, 0xc
            //   0107                 | add                 dword ptr [edi], eax
            //   8b37                 | mov                 esi, dword ptr [edi]
            //   03f3                 | add                 esi, ebx
            //   e8????????           |                     
            //   6854414449           | push                0x49444154

        $sequence_9 = { 57 c7460404100680 897e0c 894614 ff75f8 53 ff15???????? }
            // n = 7, score = 200
            //   57                   | push                edi
            //   c7460404100680       | mov                 dword ptr [esi + 4], 0x80061004
            //   897e0c               | mov                 dword ptr [esi + 0xc], edi
            //   894614               | mov                 dword ptr [esi + 0x14], eax
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   53                   | push                ebx
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 118784
}
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