Analysis

  • max time kernel
    68s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    07-07-2022 11:25

General

  • Target

    4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe

  • Size

    746KB

  • MD5

    23c27e8bdb1ff3db612870d99286da5d

  • SHA1

    55f645e84e402af7faaf50e92032f3283ea7e7c6

  • SHA256

    4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd

  • SHA512

    665715900f37cb369c1153dc31170192518b83d2b592086ede539f9333bf67fc5088ae2b5fbbabb3a3b79013b05b83e4c40a39b41e2b354361c93feebac14cb5

Malware Config

Extracted

Family

djvu

C2

http://ring1.ug/As73yhsyU34578hxxx/SDf565g/get.php

Attributes
  • extension

    .meka

  • offline_id

    iToA4bsB4p1U6eP9sYfwett26TIoVaIjXvmekat1

  • payload_url

    http://ring1.ug/files/cost/updatewin1.exe

    http://ring1.ug/files/cost/updatewin2.exe

    http://ring1.ug/files/cost/updatewin.exe

    http://ring1.ug/files/cost/3.exe

    http://ring1.ug/files/cost/4.exe

    http://ring1.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-h159DSA7cz 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: salesrestoresoftware@firemail.cc Reserve e-mail address to contact us: salesrestoresoftware@gmail.com Your personal ID: 0178Asd374y5iuhld

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 4 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\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
    "C:\Users\Admin\AppData\Local\Temp\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1600
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\2ec0dd5e-f2ab-4f84-b7cb-f8961042695c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:1720
    • C:\Users\Admin\AppData\Local\Temp\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
      "C:\Users\Admin\AppData\Local\Temp\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:1344

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
    Filesize

    2KB

    MD5

    5db668fcbd4d137ac1741a45df2b166d

    SHA1

    36598c594bf9f2c78c50da3c5ca82af3a340fcd0

    SHA256

    e54397614def60b3e91dda1aee50a439162263f9bdc73b9df427d55e361593a0

    SHA512

    c9d58d056a2a9ba42a055be1f070a99f14cfdc65bc9a8662b3bc457ff8ca1ec854254555a3bed31af67363dbfa6eac7bbf6ee16e8286371e8aa125dec8cd5e84

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

    60KB

    MD5

    589c442fc7a0c70dca927115a700d41e

    SHA1

    66a07dace3afbfd1aa07a47e6875beab62c4bb31

    SHA256

    2e5cb72e9eb43baafb6c6bfcc573aac92f49a8064c483f9d378a9e8e781a526a

    SHA512

    1b5fa79e52be495c42cf49618441fb7012e28c02e7a08a91da9213db3ab810f0e83485bc1dd5f625a47d0ba7cfcdd5ea50acc9a8dcebb39f048c40f01e94155b

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

    1KB

    MD5

    edc7462655e639289e72bac7927c5fc4

    SHA1

    6d257306c79b1ed31d2e99dfcd4fe8410560b280

    SHA256

    2d248d2f1e355a14dfb265503783f783a1b05b32010ba4edc6985d579b4bfb65

    SHA512

    59bec750e075e650b704f1b668d04c85ddca119b6d036d48d3912cb8c4c77961e06ee91df279be12a8d238e920dfb9142cdec0a64ce4618dec230fb30db72d25

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

    402B

    MD5

    908b3d5ced0b2ae81e79fec75e8d0520

    SHA1

    3d70173df059c7c8e927efba28312433b533179a

    SHA256

    eb8101ca72bdbf9b620f0a68c0d4c92bd1937630448529f530b46d3fd486ea08

    SHA512

    1ba5232f24deb99fb2a244bb1398737f0c74edf2ab2a1d7a7cecebe179e09decbf25fa7dbb7237c645746293cc89d4055bca01fbf2bd93ca1e5f4ef2a8ad285c

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

    340B

    MD5

    06cafeb2d072575cac6db0c281918c7d

    SHA1

    7e74316b577fe3e6ef5e322256ff0b35bdd8d71d

    SHA256

    5b5aaf9a1bf4453f94e609c4af2663c9b03215121c8152c180de78a5c677e593

    SHA512

    2d261a44adfcfbe4069bd695c0c3666765d76dac885ec43d0ea470f949c08acd4adebc990a24ffe964018fb1b913208df742a977aaf5d7a9683da9302605f162

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

    396B

    MD5

    f55c9b36020833cd72be01a700b8b9b8

    SHA1

    9b5eed4f5324bebbb835c4fed93564654ea6af4d

    SHA256

    65ee734c2b8db7598d92531721a5cea141f46899b545251f0ac73ac0c2c110b2

    SHA512

    3f35f0e1516c12df826abeb78a899057bddc4e46aa83429305dd656a1dd8f25af944f91fb897da8877d959ff0870af9113f9af001890e65baa933107bf223f58

  • C:\Users\Admin\AppData\Local\2ec0dd5e-f2ab-4f84-b7cb-f8961042695c\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
    Filesize

    746KB

    MD5

    23c27e8bdb1ff3db612870d99286da5d

    SHA1

    55f645e84e402af7faaf50e92032f3283ea7e7c6

    SHA256

    4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd

    SHA512

    665715900f37cb369c1153dc31170192518b83d2b592086ede539f9333bf67fc5088ae2b5fbbabb3a3b79013b05b83e4c40a39b41e2b354361c93feebac14cb5

  • memory/1344-72-0x0000000000400000-0x0000000000C58000-memory.dmp
    Filesize

    8.3MB

  • memory/1344-71-0x0000000000CD0000-0x0000000000D61000-memory.dmp
    Filesize

    580KB

  • memory/1344-61-0x0000000000000000-mapping.dmp
  • memory/1344-63-0x0000000000CD0000-0x0000000000D61000-memory.dmp
    Filesize

    580KB

  • memory/1600-58-0x0000000000400000-0x0000000000C58000-memory.dmp
    Filesize

    8.3MB

  • memory/1600-62-0x0000000000400000-0x0000000000C58000-memory.dmp
    Filesize

    8.3MB

  • memory/1600-54-0x0000000000220000-0x00000000002B1000-memory.dmp
    Filesize

    580KB

  • memory/1600-57-0x0000000000C60000-0x0000000000D7A000-memory.dmp
    Filesize

    1.1MB

  • memory/1600-56-0x0000000000220000-0x00000000002B1000-memory.dmp
    Filesize

    580KB

  • memory/1600-55-0x0000000075CD1000-0x0000000075CD3000-memory.dmp
    Filesize

    8KB

  • memory/1720-59-0x0000000000000000-mapping.dmp