Analysis

  • max time kernel
    141s
  • max time network
    170s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    24-05-2022 00:51

General

  • Target

    f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

  • Size

    683KB

  • MD5

    22e0f02888c452e5a90aa375e0475987

  • SHA1

    884d2ea4fa6659ac1e09572100502409a0eaf748

  • SHA256

    f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd

  • SHA512

    7845232099215d8dd670d5219f6967e5caf34678f86c32865fe8d03551ea84575f882738a7edec5b35d75d0d5207e9e32140431572ff9f622ab2a1384dc70046

Malware Config

Extracted

Family

djvu

C2

http://vizk1.ug/As73yhsyU34578hxxx1/SDf565g/get.php

Attributes
  • extension

    .repp

  • offline_id

    j4mSCzF3yhC0DJadRCZ4LxftIh8CY8isHUYeuYt1

  • payload_url

    http://vizk1.ug/files/cost/updatewin1.exe

    http://vizk1.ug/files/cost/updatewin2.exe

    http://vizk1.ug/files/cost/updatewin.exe

    http://vizk1.ug/files/cost/3.exe

    http://vizk1.ug/files/cost/4.exe

    http://vizk1.ug/files/cost/5.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like photos, 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-glN3dXaDLr 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: 0203asdoeoOOdf

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 3 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
    "C:\Users\Admin\AppData\Local\Temp\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1988
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\938a9982-cb70-4cce-aa7a-0b40ecf0c4c0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:852
    • C:\Users\Admin\AppData\Local\Temp\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe
      "C:\Users\Admin\AppData\Local\Temp\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:1672

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    727B

    MD5

    263d12469947e2539c2a2a04bb056345

    SHA1

    a63fd9efc397db4cc1a82cf89b7fc8e0f6694d39

    SHA256

    102af65a56e5cea616b871487be0aa8525e3258d514ca80d3a2918c3a4f23315

    SHA512

    571bd3d3ec72023ea4ec0861baeff535fc3e71716f2c08c3305f25d615448b13a4d4bc0f7d05c500f523ad13e6ba3c2e2549891c63cc170b7f1743bc8a148df1

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

    Filesize

    60KB

    MD5

    b9f21d8db36e88831e5352bb82c438b3

    SHA1

    4a3c330954f9f65a2f5fd7e55800e46ce228a3e2

    SHA256

    998e0209690a48ed33b79af30fc13851e3e3416bed97e3679b6030c10cab361e

    SHA512

    d4a2ac7c14227fbaf8b532398fb69053f0a0d913273f6917027c8cadbba80113fdbec20c2a7eb31b7bb57c99f9fdeccf8576be5f39346d8b564fc72fb1699476

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

    Filesize

    471B

    MD5

    1670ab0904b0779e9046a6c0ae0ccf8b

    SHA1

    0030369be3da0ef23ac809d8963fdeb76de17eeb

    SHA256

    34a5f72509ddfed75552cbb5007e460c9c9f6dc6c511b12e32083b1a9c030ba5

    SHA512

    e0cf63ec3f97979c2ad1318954f2daecc3639c3112548796ba8996eb119443a4bca933e1353f1dfd4068de7925ef765a3a9f4f5591702c5876b9a46246415e7e

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

    Filesize

    402B

    MD5

    f13ccb52cd87ae1c108e6c58226ed19a

    SHA1

    b7031a61d47b8411cb912b9b87389cf37a8c191e

    SHA256

    2a991d5803cb344e97c92c9b0c680d8f22f7611072dd2f7fe1a839ca6682e030

    SHA512

    bd20e80b178a818aa4c3df1970f989cc464a0776ac13abb3e4ca38f4caa3b5642f3291bdd7fa5cefd9ebef7bfd0f71a187cbf7f722873a185c06d408de9936b8

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

    Filesize

    344B

    MD5

    ff37953bd151f32d01462efeafcd01e1

    SHA1

    36f1244934cd5757e737be769f44be5bfdd19d75

    SHA256

    be7cf56f3a5074351697527e49f1e631aa6c9d2c7979b40d2599292a82436974

    SHA512

    072703a6506734def215820a4fbcf72fe029ecafea86fec2c645fa538a1dabf563b6de1f1c70f626e6a6df2a0960520aaa9480d5efa182d7289252e533b147ae

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

    Filesize

    396B

    MD5

    ca5ceb8be00a7017176be06a19e78fb6

    SHA1

    88e561dcf0c5c01ea6db6410772cb58af35dfe40

    SHA256

    25d167e3f0ec4495cbb130d3d2aac130a2a7ea85c394e0ac8dab76a0bd641e9c

    SHA512

    5902d3d52a59006b4168f6cef56b4f32d78d377491a6223b4e0af87ddf5f72c838b729b81bf5e9b8cc79c3dfc9d6dbcbf20109f1807db5a14226b51f12aa92c0

  • C:\Users\Admin\AppData\Local\938a9982-cb70-4cce-aa7a-0b40ecf0c4c0\f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd.exe

    Filesize

    683KB

    MD5

    22e0f02888c452e5a90aa375e0475987

    SHA1

    884d2ea4fa6659ac1e09572100502409a0eaf748

    SHA256

    f5c19d0be99c1be10bbed598bc2cd61faf9363fce70c1d7b3fe792fd5d8865cd

    SHA512

    7845232099215d8dd670d5219f6967e5caf34678f86c32865fe8d03551ea84575f882738a7edec5b35d75d0d5207e9e32140431572ff9f622ab2a1384dc70046

  • memory/852-59-0x0000000000000000-mapping.dmp

  • memory/1672-62-0x0000000000230000-0x00000000002C1000-memory.dmp

    Filesize

    580KB

  • memory/1672-61-0x0000000000000000-mapping.dmp

  • memory/1672-70-0x0000000000230000-0x00000000002C1000-memory.dmp

    Filesize

    580KB

  • memory/1672-71-0x0000000000400000-0x0000000003752000-memory.dmp

    Filesize

    51.3MB

  • memory/1988-54-0x00000000037D0000-0x0000000003861000-memory.dmp

    Filesize

    580KB

  • memory/1988-58-0x0000000000400000-0x0000000003752000-memory.dmp

    Filesize

    51.3MB

  • memory/1988-57-0x0000000005030000-0x000000000514A000-memory.dmp

    Filesize

    1.1MB

  • memory/1988-56-0x00000000037D0000-0x0000000003861000-memory.dmp

    Filesize

    580KB

  • memory/1988-55-0x00000000754A1000-0x00000000754A3000-memory.dmp

    Filesize

    8KB