Analysis

  • max time kernel
    97s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-09-2022 18:48

General

  • Target

    file.exe

  • Size

    821KB

  • MD5

    eab9ded288ae44356d1063e5898748d3

  • SHA1

    4345b26ac78f3eb0ef37e387e91e6ab55a0ef9c2

  • SHA256

    528f4b8565a6941bcd72f1f90af1034fe4b93e401609bde90437fba1a3227e2b

  • SHA512

    3156c48b49eb9fd8211725fac62cb6a45d0dbc7085dab540348844c52c0d686351a1742d6642b51abdb28f2dd0591dee82a43215a9df0438a4319d791b489c53

  • SSDEEP

    12288:Ja/k3ctBqrBJ80KndOTI6dFthB3htYuYt6yQwqAYQ6+wQhsTWV4Ng4a6i:JpcjaKn0MW/3Y1t6yvwbNHi

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
  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 2 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
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 56 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:5032
    • C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3588
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\9228a6c2-1671-46d9-885d-c7edd6021322" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:740
      • 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:1356
        • C:\Users\Admin\AppData\Local\Temp\file.exe
          "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4252
          • C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe
            "C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1552
            • C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe
              "C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe"
              6⤵
              • Executes dropped EXE
              • Checks computer location settings
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:4448
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" 195.201.253.5/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe" & del C:\PrograData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:1804
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1392
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:2068
          • C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build3.exe
            "C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:2060
            • 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:428
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3988
    • 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"
      2⤵
      • Creates scheduled task(s)
      PID:1036

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\ProgramData\mozglue.dll

    Filesize

    593KB

    MD5

    c8fd9be83bc728cc04beffafc2907fe9

    SHA1

    95ab9f701e0024cedfbd312bcfe4e726744c4f2e

    SHA256

    ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

    SHA512

    fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

  • C:\ProgramData\nss3.dll

    Filesize

    2.0MB

    MD5

    1cc453cdf74f31e4d913ff9c10acdde2

    SHA1

    6e85eae544d6e965f15fa5c39700fa7202f3aafe

    SHA256

    ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

    SHA512

    dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

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

    Filesize

    2KB

    MD5

    ea3ead1b160922fb25b1b9d766a56fa5

    SHA1

    9f61cb0a5a80fa5ba776f71fed4728d002d3aca1

    SHA256

    4080213fba647d43c0ac02710ac7b631c23f8f791930016045cda9aeec1b6867

    SHA512

    ec817bdc668bff4c266ca8b6a6c4068251926714262a95f9ac7f7565e2d66a26371589182d0ba1d03fa482d99430b865cb7eb24becf92b72e45f20b26a215c15

  • 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

    b81e23282abf26ff287c29581f459679

    SHA1

    b36d2aefcc1ad94c3c5928bef5496fe65502cb64

    SHA256

    dcb926ea6cdebf34bc98470f5eba9af46a718705d9471a8e8ada95428f14cbeb

    SHA512

    2a4f85f111f72d56527008f59efb5966d2003ed9df16a2f17ead72bf3463adbefab739922dbf397ef2b93b10c7eb679363c584e3bb2db276cd8c341e1c805625

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

    Filesize

    482B

    MD5

    6cf33634f831091005514317da3c0900

    SHA1

    102f113a05f1f20b4459c4532fe4768b2d1d93a3

    SHA256

    f19e802b98c64c0e400388ee9cf9bd027e180b9ba4900439819ddac6b7efc053

    SHA512

    017b4bfa11706c4e0a216e368dec3590a7b88a7f35509f2e6f9e81b28cc14df059cd79749e51eefcd5bea659555883403f9b3517d72e54231e65f5333a9737cd

  • C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe

    Filesize

    376KB

    MD5

    8b01bb02b7aeb097ba96dc7628575ca0

    SHA1

    11046fb024f695b1dc7a3a0be9167cb4e85548c6

    SHA256

    7abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a

    SHA512

    64cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35

  • C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe

    Filesize

    376KB

    MD5

    8b01bb02b7aeb097ba96dc7628575ca0

    SHA1

    11046fb024f695b1dc7a3a0be9167cb4e85548c6

    SHA256

    7abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a

    SHA512

    64cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35

  • C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe

    Filesize

    376KB

    MD5

    8b01bb02b7aeb097ba96dc7628575ca0

    SHA1

    11046fb024f695b1dc7a3a0be9167cb4e85548c6

    SHA256

    7abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a

    SHA512

    64cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35

  • C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\9228a6c2-1671-46d9-885d-c7edd6021322\file.exe

    Filesize

    821KB

    MD5

    eab9ded288ae44356d1063e5898748d3

    SHA1

    4345b26ac78f3eb0ef37e387e91e6ab55a0ef9c2

    SHA256

    528f4b8565a6941bcd72f1f90af1034fe4b93e401609bde90437fba1a3227e2b

    SHA512

    3156c48b49eb9fd8211725fac62cb6a45d0dbc7085dab540348844c52c0d686351a1742d6642b51abdb28f2dd0591dee82a43215a9df0438a4319d791b489c53

  • 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

  • memory/428-159-0x0000000000000000-mapping.dmp

  • memory/740-139-0x0000000000000000-mapping.dmp

  • memory/1036-163-0x0000000000000000-mapping.dmp

  • memory/1356-141-0x0000000000000000-mapping.dmp

  • memory/1356-146-0x0000000001FC1000-0x0000000002053000-memory.dmp

    Filesize

    584KB

  • memory/1392-194-0x0000000000000000-mapping.dmp

  • memory/1552-168-0x0000000000B38000-0x0000000000B64000-memory.dmp

    Filesize

    176KB

  • memory/1552-170-0x0000000000940000-0x000000000098A000-memory.dmp

    Filesize

    296KB

  • memory/1552-153-0x0000000000000000-mapping.dmp

  • memory/1804-192-0x0000000000000000-mapping.dmp

  • memory/2060-156-0x0000000000000000-mapping.dmp

  • memory/2068-195-0x0000000000000000-mapping.dmp

  • memory/3588-138-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3588-132-0x0000000000000000-mapping.dmp

  • memory/3588-133-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3588-142-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3588-137-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3588-134-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4252-143-0x0000000000000000-mapping.dmp

  • memory/4252-160-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4252-145-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4252-147-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4252-152-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4448-169-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/4448-171-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/4448-172-0x0000000061E00000-0x0000000061EF3000-memory.dmp

    Filesize

    972KB

  • memory/4448-165-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/4448-164-0x0000000000000000-mapping.dmp

  • memory/4448-167-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/4448-193-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/5032-136-0x00000000023B0000-0x00000000024CB000-memory.dmp

    Filesize

    1.1MB

  • memory/5032-135-0x0000000002252000-0x00000000022E4000-memory.dmp

    Filesize

    584KB