Analysis

  • max time kernel
    129s
  • max time network
    131s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    04-12-2021 08:15

General

  • Target

    29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec.exe

  • Size

    796KB

  • MD5

    472097765682071245c1543bd74bb1df

  • SHA1

    29c08b95b015df3a7c5f76462af0f760feed3774

  • SHA256

    29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec

  • SHA512

    7c98c19e00834beb69b8049eec840537864e5267b6a9b0be0809d9edb4b04bf51376a10a87350d6b5cc4c6bc9bec25c554fadbc538e8d1012e7a9088c16f083f

Malware Config

Extracted

Family

djvu

C2

http://tzgl.org/lancer/get.php

Attributes
  • extension

    .yqal

  • offline_id

    K3PMMX2aWwpnYby88Dzg7tmaIW7Tv0HMWvSyr7t1

  • payload_url

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

    http://tzgl.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-rIyEiK9ekc 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: 0356gSd743d

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 6 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

  • 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 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec.exe
    "C:\Users\Admin\AppData\Local\Temp\29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3792
    • C:\Users\Admin\AppData\Local\Temp\29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec.exe
      "C:\Users\Admin\AppData\Local\Temp\29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:664
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\212b0a64-a1fd-4cd3-8fcc-fadd7059a8e5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3312
      • C:\Users\Admin\AppData\Local\Temp\29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec.exe
        "C:\Users\Admin\AppData\Local\Temp\29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3588
        • C:\Users\Admin\AppData\Local\Temp\29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec.exe
          "C:\Users\Admin\AppData\Local\Temp\29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1040

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

File Permissions Modification

1
T1222

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
    MD5

    6a4823dd14ee6616a4ef99d2bea9a44c

    SHA1

    1b0952c188fce7f3a0014cb473a80a66f3c71337

    SHA256

    cef0b13034255ff54ac6ee3a35c93cd92fe3d80e5793c2b5e63c0a42fcc3ff98

    SHA512

    a41d2a3f5c827518c102487af315e1303a50578eb258f65c17591eba0bc027ee2aa0a4941c494b9b5eb89842382f60ab3fec66e15a3f77cbf03cbae6dd9974c6

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    efd1d8e8293f5bd8d688fef877221ccb

    SHA1

    55fd26b5c3ad5242aa08d1910c2e085d30489549

    SHA256

    43be67b3e85dd203dfabd04252b7b5a261b21ec846e11d760a4f07e70bf528c1

    SHA512

    755e7c67c4a0bc84debd21727d38dca438e7ea3ac8dc98b5f4140ae3f5de32c34aacd63c7cbfb110e1a2d3859089317a4401e07b7db5c36d2d167d9b764ec2cb

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
    MD5

    49db569e8a344a19f30303017c953fdc

    SHA1

    84be3fd5b52ae7a096692be3718060dded043311

    SHA256

    0772b5885c4b809e36c5ed2e0e7ca4bddd35a9aabfdafdc2b4360f32567c5649

    SHA512

    c19ae791662279974775d771746567eb26525749ffd4d2833979e1f318e5f6f58821adef5d290f05bcfa9796309bc385ba0c333106a8f38c3f619531c7817ff8

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    dcb6809489d52fa9694217cb9a699caa

    SHA1

    d5175e4689275badf312b3464e2752a7e694eca5

    SHA256

    df412fe5ab1d7815d6195a19da490f1748c7f9cf7be1f64032161bcc83f99a83

    SHA512

    26fa6e90b74b609c9560729c3688e0ba163faf075eb87711bc4f132b9249c54f9805de8414a7cb0b300a9f2cd22435bc632113dc249484aae4b11e5bf054f95a

  • C:\Users\Admin\AppData\Local\212b0a64-a1fd-4cd3-8fcc-fadd7059a8e5\29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec.exe
    MD5

    472097765682071245c1543bd74bb1df

    SHA1

    29c08b95b015df3a7c5f76462af0f760feed3774

    SHA256

    29eadaa32588aadb70d41e985bc1a87e232464a85a21ad7e663b1939439e28ec

    SHA512

    7c98c19e00834beb69b8049eec840537864e5267b6a9b0be0809d9edb4b04bf51376a10a87350d6b5cc4c6bc9bec25c554fadbc538e8d1012e7a9088c16f083f

  • memory/664-118-0x0000000000424141-mapping.dmp
  • memory/664-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/664-117-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1040-125-0x0000000000424141-mapping.dmp
  • memory/1040-130-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3312-120-0x0000000000000000-mapping.dmp
  • memory/3588-122-0x0000000000000000-mapping.dmp
  • memory/3588-123-0x0000000002145000-0x00000000021D6000-memory.dmp
    Filesize

    580KB

  • memory/3792-115-0x0000000002202000-0x0000000002293000-memory.dmp
    Filesize

    580KB

  • memory/3792-116-0x00000000022F0000-0x000000000240B000-memory.dmp
    Filesize

    1.1MB