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Analysis

  • max time kernel
    54s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    18/09/2022, 18:38

General

  • Target

    file.exe

  • Size

    787KB

  • MD5

    f976de456e761a39e3e9a12ccbd88bce

  • SHA1

    8c40302b89309035e90cd098bb1d2215c97f1a43

  • SHA256

    249cb4680de5cf06721fa03944054178a62fa79bdfb484ab1bcaea4b0d66a33e

  • SHA512

    11a1bf2b0110676d1e432547c757b8767cb522207dd27fbbbde237d2361e10476385b30f4dbbcff668528950b782dd2f105550300559e61aa275cede4ecdf397

  • SSDEEP

    12288:gRfNHwRGWrynMdC4YrytHTaEg4p4AMWmcEukaYY9dHmWZrLM0Ai75:gzwlVLYrwzaEg4p4LWsuka59ZnA45

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test3/get.php

Attributes
  • extension

    .aamv

  • offline_id

    MyudhIExJux2oRQXw95TT1oAPu7mvqRMzxr1eet1

  • payload_url

    http://rgyui.top/dl/build2.exe

    http://acacaca.org/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-4Xcf4IX21n Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0564Jhyjd

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 10 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 6 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

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

  • 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). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2012
    • C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1048
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\5bc3b6e2-63f3-4eaf-9684-ef6973abf96f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1072
      • C:\Users\Admin\AppData\Local\Temp\file.exe
        "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:604
        • C:\Users\Admin\AppData\Local\Temp\file.exe
          "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1500
          • C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build2.exe
            "C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1056
            • C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build2.exe
              "C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:1632
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" Ž/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build2.exe" & del C:\PrograData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:1464
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2008
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:1044
          • C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build3.exe
            "C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:916
            • C:\Windows\SysWOW64\schtasks.exe
              /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
              6⤵
              • Creates scheduled task(s)
              PID:1276
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {2305218C-5C80-4DFD-9A18-51AF3C2F37CC} S-1-5-21-4063495947-34355257-727531523-1000:RYNKSFQE\Admin:Interactive:[1]
    1⤵
      PID:544
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        PID:984
        • C:\Windows\SysWOW64\schtasks.exe
          /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
          3⤵
          • Creates scheduled task(s)
          PID:880

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

      Filesize

      2KB

      MD5

      1c626eac6241b02b0082a76f150a3a8a

      SHA1

      b7c0c6ae1d3d5a2beaf4c4f3744cac6285f04858

      SHA256

      412116af67c3a894bee8821158ee91447ca6cfe0d5b43d0524e6c5af5defaf69

      SHA512

      8550f0ec9a9c5f152a3b5eb49a91084d3201589373b8d381233926f1ac34bd0c276fa1e3c9da75bd8297f417d9f566f4bf6b882107c7255522f745e6d446802a

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

      Filesize

      1KB

      MD5

      e9e482bf825221326b7c080ef52e5036

      SHA1

      67244c170dad567630298f89364a5e9626e2517a

      SHA256

      60843d5086f10e833ca98696967f1a39ea04a2ffee6d87679b5803092b9cfa71

      SHA512

      c7a5fd63c0faa2a5cd8be90c7dcf10d8dd564964dc4b8ab4fa1a7a188fa89094563f595c94f4ea133582cfbcf9cc90cb74bd273924b7fa5eadae868bced51440

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

      Filesize

      488B

      MD5

      c973bcdf7d2fbdb8d3ba2b1df5c92921

      SHA1

      ca00de03fb2a621cf416ec3b1c530569a2523814

      SHA256

      d41cda22550a44a5652078c29d4cf79d5956a049c626981ededce618238d7b15

      SHA512

      78b61ed8297ab1962a9dd8f28df550ceb1a2ac0071eadc6b4bcb66f60f863ad3ad10caf543fc461b138e7be45d9f1eb80f256767f7748e768b3bc9e22486bb68

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

      Filesize

      344B

      MD5

      de521980d69920ea27319a6f5f374847

      SHA1

      22625a516a46b1462ca56d22c4043b00c2905292

      SHA256

      e2d7cf0517cad92059eb002e8517b882c79ff7736e488dd0c3742a6fefe5c5e2

      SHA512

      f6eaf41e929e723d63afb231a667f71cd2823779e065c961c3a99b6165d5bfb5050ff5efa7f8107fb78207f3c84b7a8b2c57ff5aab4a92612088888f5dc530b2

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

      Filesize

      482B

      MD5

      43e887fc28c54f0344ebea6d6a5897cb

      SHA1

      48d9b439e564e6660320392b64f92d6da6922d93

      SHA256

      a62f81845c4a2b6e0aa80c07e0bee44d2d629687a4da5e5075d05ff3448b875c

      SHA512

      628b1e5bd0c5d11de8d47eb15e264a568a67b75892a8334e3b998a5b631fc0d0d410ca42c246d274f21ca6b63d5c6f2fbdc7537d8d97e89f91ba789984a6ffb4

    • C:\Users\Admin\AppData\Local\5bc3b6e2-63f3-4eaf-9684-ef6973abf96f\file.exe

      Filesize

      787KB

      MD5

      f976de456e761a39e3e9a12ccbd88bce

      SHA1

      8c40302b89309035e90cd098bb1d2215c97f1a43

      SHA256

      249cb4680de5cf06721fa03944054178a62fa79bdfb484ab1bcaea4b0d66a33e

      SHA512

      11a1bf2b0110676d1e432547c757b8767cb522207dd27fbbbde237d2361e10476385b30f4dbbcff668528950b782dd2f105550300559e61aa275cede4ecdf397

    • C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build2.exe

      Filesize

      400KB

      MD5

      fe7e1a7ed3cece1c44e1eac81cb36948

      SHA1

      f9f191e7e67ae39eb71099c4cedbf1be234e951e

      SHA256

      32403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18

      SHA512

      ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35

    • C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build2.exe

      Filesize

      400KB

      MD5

      fe7e1a7ed3cece1c44e1eac81cb36948

      SHA1

      f9f191e7e67ae39eb71099c4cedbf1be234e951e

      SHA256

      32403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18

      SHA512

      ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35

    • C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build2.exe

      Filesize

      400KB

      MD5

      fe7e1a7ed3cece1c44e1eac81cb36948

      SHA1

      f9f191e7e67ae39eb71099c4cedbf1be234e951e

      SHA256

      32403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18

      SHA512

      ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35

    • C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • C:\Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • \ProgramData\mozglue.dll

      Filesize

      593KB

      MD5

      c8fd9be83bc728cc04beffafc2907fe9

      SHA1

      95ab9f701e0024cedfbd312bcfe4e726744c4f2e

      SHA256

      ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

      SHA512

      fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

    • \ProgramData\nss3.dll

      Filesize

      2.0MB

      MD5

      1cc453cdf74f31e4d913ff9c10acdde2

      SHA1

      6e85eae544d6e965f15fa5c39700fa7202f3aafe

      SHA256

      ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

      SHA512

      dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

    • \Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build2.exe

      Filesize

      400KB

      MD5

      fe7e1a7ed3cece1c44e1eac81cb36948

      SHA1

      f9f191e7e67ae39eb71099c4cedbf1be234e951e

      SHA256

      32403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18

      SHA512

      ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35

    • \Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build2.exe

      Filesize

      400KB

      MD5

      fe7e1a7ed3cece1c44e1eac81cb36948

      SHA1

      f9f191e7e67ae39eb71099c4cedbf1be234e951e

      SHA256

      32403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18

      SHA512

      ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35

    • \Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • \Users\Admin\AppData\Local\c53acbe7-aedf-428a-8de7-5c6eb01b688a\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • memory/604-71-0x00000000002B0000-0x0000000000342000-memory.dmp

      Filesize

      584KB

    • memory/604-66-0x00000000002B0000-0x0000000000342000-memory.dmp

      Filesize

      584KB

    • memory/1048-61-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1048-59-0x0000000074B51000-0x0000000074B53000-memory.dmp

      Filesize

      8KB

    • memory/1048-67-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1048-62-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1048-55-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1056-97-0x0000000001BC0000-0x0000000001C0A000-memory.dmp

      Filesize

      296KB

    • memory/1056-95-0x000000000028B000-0x00000000002B7000-memory.dmp

      Filesize

      176KB

    • memory/1500-73-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1500-125-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1500-79-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1632-101-0x0000000061E00000-0x0000000061EF3000-memory.dmp

      Filesize

      972KB

    • memory/1632-122-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1632-100-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1632-99-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1632-92-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/2012-58-0x0000000000230000-0x00000000002C2000-memory.dmp

      Filesize

      584KB

    • memory/2012-60-0x0000000001D20000-0x0000000001E3B000-memory.dmp

      Filesize

      1.1MB

    • memory/2012-54-0x0000000000230000-0x00000000002C2000-memory.dmp

      Filesize

      584KB