Analysis

  • max time kernel
    155s
  • max time network
    169s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    16-05-2022 14:04

General

  • Target

    3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9.exe

  • Size

    1.1MB

  • MD5

    bba54c282b52450d29c0372a0d0801ea

  • SHA1

    670981a5ef11461aa1891ab300c41f7e83c4e64d

  • SHA256

    3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9

  • SHA512

    056cba65bbaf1aaa7f9a3d548dd6b958e562cd4e3be5e91b1998c3d998f5197a241b7bf8da8470743962d902153b6cfbf2239e18b7bacdd6f30ecae248e71c5d

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .coot

  • offline_id

    MRQ5kb5Z12tWuP3e25YoRt4PRDrJd2yuI3coott1

  • 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-IbdGyCKhdr 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: 0175Asd374y5iuhld

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\3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9.exe
    "C:\Users\Admin\AppData\Local\Temp\3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1616
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\3eaf2114-0f51-4938-9d08-c7a7cb7f9512" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:1740
    • C:\Users\Admin\AppData\Local\Temp\3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9.exe
      "C:\Users\Admin\AppData\Local\Temp\3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:1108

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

    727B

    MD5

    8ae6f45bb6c9f288a96a3402dc17e2d9

    SHA1

    9ddb0d782cb4728675a1f5b61cfc632997349cdf

    SHA256

    ae4681e5db7de9744bdd78a943d6be6a390aa925125935d6cb691a27c8b2ebd3

    SHA512

    ee94f18f21437c1fba42cca69d535997c89438801ea6e823e99d384e9bc0239b041dc5ed854063a571bac2bbd2f83d7113c7f456d130b15e7db847e7fe4e8ec7

  • 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

    b1c4234d2346ca5a2267de9f0bab4b81

    SHA1

    d6d10976b258ee86430063fdfb1838bb73838aeb

    SHA256

    e75d5e79323e42e337cf188a296db211f5d7dd488d03adf4b1be7836f997e3ed

    SHA512

    8b1d4c34ad847b73d060cb35dba350032be0a8cd82637a5c52805c078ea986ea44446040f588fb4edda4a233e424bdb6dc3ba016b7647936ec4ef4f971ff1e17

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

    402B

    MD5

    7346ac7dfce6b9ae832ba941f592e1e5

    SHA1

    50bd552009f30d096305c11b3bfc617fcbd3e1f6

    SHA256

    0ed069104533357a7f05a1d4abf949c67005b0d414ef560d90f245de6815c994

    SHA512

    87def9f2d0a74405a73c6202796c31a59fa9c6604a2545c8a3e51a83e4de987dc1bb9503f6f516bf770b53892af43fe38a1ce8094cb4eb859dc8385744f713b8

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

    344B

    MD5

    4e5e99a55750aa41f4f2ec10d27f944d

    SHA1

    a83e6024eedc9358cf277b9845dca5175a4b6fa6

    SHA256

    dd73f114619c694ba0decc83d7812380dc79662e38c0cc14e9d35a9a4cb5456a

    SHA512

    fe7a2d82a5ef386c77fded242ec9e21e7b6782a33fad4f68462f6597b1c4797c0197fde2b57e4a2aff22da2aed84d14666985b07296d756fead0f98ab7db70d8

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

    396B

    MD5

    9c390404a05dfe001355c749bdc266df

    SHA1

    49acdce13674f2ab2355896c56d0990f15569a52

    SHA256

    de74f13d245e1e7bf0ab5d625707c714347a12d7f2287d3df520d53708c5cb94

    SHA512

    ea6ac2e129de4fbfaddef50e0e1950557b4042123753263b9d60f0ebe939b33093a649ce824a6e8a695765aa7e6e1f1ae9442511206dc782611939dcdfd83f13

  • C:\Users\Admin\AppData\Local\3eaf2114-0f51-4938-9d08-c7a7cb7f9512\3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9.exe
    Filesize

    1.1MB

    MD5

    bba54c282b52450d29c0372a0d0801ea

    SHA1

    670981a5ef11461aa1891ab300c41f7e83c4e64d

    SHA256

    3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9

    SHA512

    056cba65bbaf1aaa7f9a3d548dd6b958e562cd4e3be5e91b1998c3d998f5197a241b7bf8da8470743962d902153b6cfbf2239e18b7bacdd6f30ecae248e71c5d

  • memory/1108-62-0x0000000009360000-0x0000000009422000-memory.dmp
    Filesize

    776KB

  • memory/1108-61-0x0000000000000000-mapping.dmp
  • memory/1108-70-0x0000000009360000-0x00000000093F1000-memory.dmp
    Filesize

    580KB

  • memory/1108-71-0x0000000009430000-0x000000000954A000-memory.dmp
    Filesize

    1.1MB

  • memory/1108-72-0x0000000000400000-0x0000000001400000-memory.dmp
    Filesize

    16.0MB

  • memory/1616-54-0x0000000009370000-0x0000000009432000-memory.dmp
    Filesize

    776KB

  • memory/1616-58-0x0000000000400000-0x0000000001400000-memory.dmp
    Filesize

    16.0MB

  • memory/1616-57-0x0000000009440000-0x000000000955A000-memory.dmp
    Filesize

    1.1MB

  • memory/1616-56-0x0000000009370000-0x0000000009401000-memory.dmp
    Filesize

    580KB

  • memory/1616-55-0x0000000076011000-0x0000000076013000-memory.dmp
    Filesize

    8KB

  • memory/1740-59-0x0000000000000000-mapping.dmp