SYMBOLCOMMON_NAMEaka. SYNONYMS
win.derusbi (Back to overview)

Derusbi

aka: PHOTO

Actor(s): APT41, Axiom, Leviathan, Stone Panda


A DLL backdoor also reported publicly as “Derusbi”, capable of obtaining directory, file, and drive listing; creating a reverse shell; performing screen captures; recording video and audio; listing, terminating, and creating processes; enumerating, starting, and deleting registry keys and values; logging keystrokes, returning usernames and passwords from protected storage; and renaming, deleting, copying, moving, reading, and writing to files.

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:972c13a, author = {SecureWorks}, title = {{BRONZE FIRESTONE}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/bronze-firestone}, language = {English}, urldate = {2020-05-23} } BRONZE FIRESTONE
9002 RAT Derusbi Empire Downloader PlugX Poison Ivy Shell Crew
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 Leviathan
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 Aurora Panda
2019-12-17Palo Alto Networks Unit 42Jen Miller-Osborn, Mike Harbison
@online{millerosborn:20191217:rancor:998fe1c, author = {Jen Miller-Osborn and Mike Harbison}, title = {{Rancor: Cyber Espionage Group Uses New Custom Malware to Attack Southeast Asia}}, date = {2019-12-17}, organization = {Palo Alto Networks Unit 42}, url = {https://unit42.paloaltonetworks.com/rancor-cyber-espionage-group-uses-new-custom-malware-to-attack-southeast-asia/}, language = {English}, urldate = {2020-01-08} } Rancor: Cyber Espionage Group Uses New Custom Malware to Attack Southeast Asia
DDKONG Derusbi KHRAT
2016-03-02RSA ConferenceVanja Svajcer
@techreport{svajcer:20160302:dissecting:e8721e3, author = {Vanja Svajcer}, title = {{Dissecting Derusbi}}, date = {2016-03-02}, institution = {RSA Conference}, url = {https://web.archive.org/web/20180310053107/https://www.rsaconference.com/writable/presentations/file_upload/hta-w02-dissecting-derusbi.pdf}, language = {English}, urldate = {2020-02-27} } Dissecting Derusbi
Derusbi
2015-12-15Airbus Defence & SpaceFabien Perigaud
@online{perigaud:20151215:newcomers:73beb0c, author = {Fabien Perigaud}, title = {{Newcomers in the Derusbi family}}, date = {2015-12-15}, organization = {Airbus Defence & Space}, url = {https://web.archive.org/web/20151216071054/http://blog.airbuscybersecurity.com/post/2015/11/Newcomers-in-the-Derusbi-family}, language = {English}, urldate = {2020-02-27} } Newcomers in the Derusbi family
Derusbi
2015-10-08Virus BulletinMicky Pun, Eric Leung, Neo Tan
@techreport{pun:20151008:catching:368d81d, author = {Micky Pun and Eric Leung and Neo Tan}, title = {{Catching the silent whisper: Understanding the Derusbi family tree}}, date = {2015-10-08}, institution = {Virus Bulletin}, url = {https://www.virusbulletin.com/uploads/pdf/conference_slides/2015/Pun-etal-VB2015.pdf}, language = {English}, urldate = {2020-02-27} } Catching the silent whisper: Understanding the Derusbi family tree
Derusbi
2015-02-27ThreatConnectThreatConnect Research Team
@online{team:20150227:anthem:3576532, author = {ThreatConnect Research Team}, title = {{The Anthem Hack: All Roads Lead to China}}, date = {2015-02-27}, organization = {ThreatConnect}, url = {https://www.threatconnect.com/the-anthem-hack-all-roads-lead-to-china/}, language = {English}, urldate = {2020-01-09} } The Anthem Hack: All Roads Lead to China
Derusbi
2015-02-06CrowdStrikeCrowdStrike
@techreport{crowdstrike:20150206:crowdstrike:fbcc37f, author = {CrowdStrike}, title = {{CrowdStrike Global Threat Intel Report 2014}}, date = {2015-02-06}, institution = {CrowdStrike}, url = {https://web.archive.org/web/20200509171721/https://raw.githubusercontent.com/fdiskyou/threat-INTel/master/2015/GlobalThreatIntelReport.pdf}, language = {English}, urldate = {2020-05-11} } CrowdStrike Global Threat Intel Report 2014
BlackPOS CryptoLocker Derusbi Elise Enfal EvilGrab Gameover P2P HttpBrowser Medusa Mirage Naikon NetTraveler pirpi PlugX Poison Ivy Sakula RAT Sinowal sykipot taidoor
2014-10-28NovettaNovetta
@techreport{novetta:20141028:derusbi:aae275a, author = {Novetta}, title = {{Derusbi (Server Variant) Analysis}}, date = {2014-10-28}, institution = {Novetta}, url = {http://www.novetta.com/wp-content/uploads/2014/11/Derusbi.pdf}, language = {English}, urldate = {2020-01-06} } Derusbi (Server Variant) Analysis
Derusbi
Yara Rules
[TLP:WHITE] win_derusbi_auto (20200529 | autogenerated rule brought to you by yara-signator)
rule win_derusbi_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.derusbi"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        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 / approach 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 = { ff7520 ff751c ff7518 ff7514 ff5014 eb52 ff7510 }
            // n = 7, score = 200
            //   ff7520               | push                dword ptr [ebp + 0x20]
            //   ff751c               | push                dword ptr [ebp + 0x1c]
            //   ff7518               | push                dword ptr [ebp + 0x18]
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   ff5014               | call                dword ptr [eax + 0x14]
            //   eb52                 | jmp                 0x54
            //   ff7510               | push                dword ptr [ebp + 0x10]

        $sequence_1 = { e8???????? 8ac3 5b 8b4dfc 33cd 5f e8???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8ac3                 | mov                 al, bl
            //   5b                   | pop                 ebx
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   33cd                 | xor                 ecx, ebp
            //   5f                   | pop                 edi
            //   e8????????           |                     

        $sequence_2 = { 5b 5d c3 55 8bec 81ec94000000 a1???????? }
            // n = 7, score = 200
            //   5b                   | pop                 ebx
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81ec94000000         | sub                 esp, 0x94
            //   a1????????           |                     

        $sequence_3 = { 56 ff15???????? 59 59 6804010000 ff750c 8d8320080000 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   ff15????????         |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   6804010000           | push                0x104
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   8d8320080000         | lea                 eax, [ebx + 0x820]

        $sequence_4 = { 83c40c 85c0 750c c785d8f2ffff01000000 eb26 6a09 68???????? }
            // n = 7, score = 200
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   750c                 | jne                 0xe
            //   c785d8f2ffff01000000     | mov    dword ptr [ebp - 0xd28], 1
            //   eb26                 | jmp                 0x28
            //   6a09                 | push                9
            //   68????????           |                     

        $sequence_5 = { 50 66a5 e8???????? 6a06 59 be???????? 8dbd9ceeffff }
            // n = 7, score = 200
            //   50                   | push                eax
            //   66a5                 | movsw               word ptr es:[edi], word ptr [esi]
            //   e8????????           |                     
            //   6a06                 | push                6
            //   59                   | pop                 ecx
            //   be????????           |                     
            //   8dbd9ceeffff         | lea                 edi, [ebp - 0x1164]

        $sequence_6 = { 53 50 ffd6 83c40c 8d442424 50 8d84242cbc0200 }
            // n = 7, score = 200
            //   53                   | push                ebx
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   83c40c               | add                 esp, 0xc
            //   8d442424             | lea                 eax, [esp + 0x24]
            //   50                   | push                eax
            //   8d84242cbc0200       | lea                 eax, [esp + 0x2bc2c]

        $sequence_7 = { ffd6 33c0 50 50 57 8d8de8f8ffff 51 }
            // n = 7, score = 200
            //   ffd6                 | call                esi
            //   33c0                 | xor                 eax, eax
            //   50                   | push                eax
            //   50                   | push                eax
            //   57                   | push                edi
            //   8d8de8f8ffff         | lea                 ecx, [ebp - 0x718]
            //   51                   | push                ecx

        $sequence_8 = { 8b4508 6a00 6a01 8d3c1e 57 ffb00c010000 ff15???????? }
            // n = 7, score = 200
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   6a00                 | push                0
            //   6a01                 | push                1
            //   8d3c1e               | lea                 edi, [esi + ebx]
            //   57                   | push                edi
            //   ffb00c010000         | push                dword ptr [eax + 0x10c]
            //   ff15????????         |                     

        $sequence_9 = { 50 89bdf0fdffff ff15???????? 8985ecfdffff 3bc7 742a 68???????? }
            // n = 7, score = 200
            //   50                   | push                eax
            //   89bdf0fdffff         | mov                 dword ptr [ebp - 0x210], edi
            //   ff15????????         |                     
            //   8985ecfdffff         | mov                 dword ptr [ebp - 0x214], eax
            //   3bc7                 | cmp                 eax, edi
            //   742a                 | je                  0x2c
            //   68????????           |                     

    condition:
        7 of them and filesize < 360448
}
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