Analysis

  • max time kernel
    300s
  • max time network
    160s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    15/01/2024, 04:51

General

  • Target

    5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe

  • Size

    849KB

  • MD5

    72fd6329b754dd39cfec917c900abb53

  • SHA1

    fa5e56d102dacecf25547c850e3624b41a85c62b

  • SHA256

    5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989

  • SHA512

    0c3bd337190662d25af61cce7c5f2fd86c72ec7e0d73e9c2a4fc9ff816f0e5d331b881d9548086db9496ff98755791e23a5346e5d5888a8e08b7203e2a62ea55

  • SSDEEP

    12288:ev0ZHRrxb4fKFjLWA37A1jrX0Hq1+KiFja4rS+P008/Daab1Cw4GT:ev09RvFz3o91+o4rS+P00KfWm

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test1/get.php

Attributes
  • extension

    .cdwe

  • offline_id

    dSwr1XNNi5cIitB5eDPbMANcusB1dWGDB8ToUnt1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://zexeq.com/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-e21iz7dS58 Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0842ASdw

rsa_pubkey.plain

Signatures

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 14 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 6 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe
    "C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2424
    • C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe
      "C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2128
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\edc48970-8386-4c1f-8bd6-86a23fcc9bfd" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2856
      • C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe
        "C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2916
        • C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe
          "C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2700
          • C:\Users\Admin\AppData\Local\1f68550d-3640-4c88-9687-be3fc029f82d\build2.exe
            "C:\Users\Admin\AppData\Local\1f68550d-3640-4c88-9687-be3fc029f82d\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:796
            • C:\Users\Admin\AppData\Local\1f68550d-3640-4c88-9687-be3fc029f82d\build2.exe
              "C:\Users\Admin\AppData\Local\1f68550d-3640-4c88-9687-be3fc029f82d\build2.exe"
              6⤵
              • Executes dropped EXE
              • Modifies system certificate store
              • Suspicious use of WriteProcessMemory
              PID:1112
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1112 -s 1456
                7⤵
                • Loads dropped DLL
                • Program crash
                PID:924

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          1KB

          MD5

          b7470a9aa569b259d4c2bb3b80ae3aa3

          SHA1

          093290296b7f1e402ef96e4b33a88f064aa401eb

          SHA256

          ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6

          SHA512

          4da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          724B

          MD5

          8202a1cd02e7d69597995cabbe881a12

          SHA1

          8858d9d934b7aa9330ee73de6c476acf19929ff6

          SHA256

          58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

          SHA512

          97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          410B

          MD5

          b4d3c11015eb23850394f9e41a509fd9

          SHA1

          090d8f05edfe72f0af93678d8c5cccf9c1def122

          SHA256

          8fa61e82fbf5fb7825776f35265a65ed071c646f7f49e793f1eaf1130f0c0205

          SHA512

          a837f4dc1bdbfb12ed73b0d2ae7c27c203f20c812599e4b65ad00df2b5baa31e44aca869d55988b1d8fee2d12d2966a3f82eac38447045bf52599bf4a6a312c7

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          b2961270991fb0e5ec63c69726007c84

          SHA1

          70a97ecec3e431738f9825cd62d3cef45d752f7c

          SHA256

          dcc92e02cef83ad45ded312a190b4241861107bf8b52ab8c2bff8b9207f3bcec

          SHA512

          f83c8a6ae486ecf9ec6a00e2f1fc5a709eafbb73a72e015f7e0e474c3c83b7dbafc4f79cf9d38e5ee7580be7fe1e2ef4c64e2e2944661d1159a343a03f9ceb5e

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          59fc789bb238cbc7ea9a1fa558aa2135

          SHA1

          214c76eed4e7e41f383922e67bd82913a8b0886f

          SHA256

          290f8d4d48dea4fc69dd120d151ef84840bfdc234431580223c8218a8eee7aa9

          SHA512

          42e8980b2a0ac693838c685f67d3f142049d58c93ab38e5206190a6f9d8e828688061b1432b07556d2b63f6bc2dc8a8714fd8dfb14dcac170d17b23b10c68ddc

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          392B

          MD5

          bb1201b2ff981b3808cd3522c73d47c4

          SHA1

          a945e830bbddcbcc16d06e47cc841cff58836d3b

          SHA256

          8e54d8a5f3e75478548fbed8bd4a9eb68a56821f0c468699b2ef16e10327559e

          SHA512

          57cdcafe515066e182fee915bfc9ad0365595b8d5ab3040c8227a7bb552487d196200514bb0e2b29179a44ffa7a9c1f9b55ec30dc606d049cd7985244a854ce2

        • C:\Users\Admin\AppData\Local\Temp\Cab5F7E.tmp

          Filesize

          5KB

          MD5

          73f101cb474d2101e5ef76e684e3bace

          SHA1

          8d7a75e1d3addd0b2b4b394f25c4f59890bde628

          SHA256

          0dfa3f44ecad5dd8e55961e9e87f8fdc4227ead46ad0f318ca52190419b49013

          SHA512

          3a69cfda58907fa7044677dfc2ad77d6bc7377ec93b21651e6bf0367de11bffd1a94111f5b17d6fde3dd3c13999753d389f5300d32f25be6f658a5995b67a95a

        • C:\Users\Admin\AppData\Local\Temp\Tar874A.tmp

          Filesize

          24KB

          MD5

          58a5a4c467264ca380e8af576aea5fc6

          SHA1

          b088408b194566e5374f07b6a1def6367248734c

          SHA256

          a2c25ad847e0839251881e10d61b39a3d6ec151ed82951b121bb77ecb065c021

          SHA512

          4c4d32117aa43c852d204de4897881dff6589595e73be4b03c332d4d08bf41fae99b3c7f7c4f87f3d078ae1d44486bb009f6d20be763fbd76c399d68595a1ccf

        • C:\Users\Admin\AppData\Local\edc48970-8386-4c1f-8bd6-86a23fcc9bfd\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe

          Filesize

          849KB

          MD5

          72fd6329b754dd39cfec917c900abb53

          SHA1

          fa5e56d102dacecf25547c850e3624b41a85c62b

          SHA256

          5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989

          SHA512

          0c3bd337190662d25af61cce7c5f2fd86c72ec7e0d73e9c2a4fc9ff816f0e5d331b881d9548086db9496ff98755791e23a5346e5d5888a8e08b7203e2a62ea55

        • \Users\Admin\AppData\Local\1f68550d-3640-4c88-9687-be3fc029f82d\build2.exe

          Filesize

          358KB

          MD5

          c4070da9f9b0581171af16e681ccdff8

          SHA1

          3fb4182921fdc3acd7873ebe113ac5522585312a

          SHA256

          26063c78e5418610471a9f3a00a155d7d1e5b29856e1979ba3bdc42681a871d0

          SHA512

          c7569cea7f1a841e7cac9cd41287dba3bcacf2cf9dee7bece88800848a7ad5dc4cd2bdc896c7389f0f1144079bbe168048b3f722bcd76fa5d6e14f3081bb6427

        • memory/796-65-0x0000000000300000-0x0000000000400000-memory.dmp

          Filesize

          1024KB

        • memory/796-66-0x00000000001C0000-0x000000000020B000-memory.dmp

          Filesize

          300KB

        • memory/1112-64-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/1112-68-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/1112-73-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/1112-72-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/1112-193-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/2128-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2128-9-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2128-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2128-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2128-8-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2424-4-0x0000000001E00000-0x0000000001F1B000-memory.dmp

          Filesize

          1.1MB

        • memory/2424-7-0x0000000000580000-0x0000000000612000-memory.dmp

          Filesize

          584KB

        • memory/2424-0-0x0000000000580000-0x0000000000612000-memory.dmp

          Filesize

          584KB

        • memory/2424-1-0x0000000000580000-0x0000000000612000-memory.dmp

          Filesize

          584KB

        • memory/2700-49-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2700-71-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2700-50-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2700-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2700-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2700-197-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2700-200-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2700-199-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2700-201-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2916-28-0x0000000000220000-0x00000000002B2000-memory.dmp

          Filesize

          584KB

        • memory/2916-30-0x0000000000220000-0x00000000002B2000-memory.dmp

          Filesize

          584KB