Resubmissions

14-11-2023 17:31

231114-v3qg7acf42 10

14-11-2023 17:21

231114-vxdw7sdg61 10

28-10-2023 19:29

231028-x7cs1age56 10

24-10-2023 13:29

231024-qrn3rsdb6z 10

18-10-2023 12:04

231018-n8ybnaeb31 10

07-09-2023 12:10

230907-pce1wahe2x 10

Analysis

  • max time kernel
    29s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    07-09-2023 12:10

General

  • Target

    81b49d3c6151419a242ba8491dff24bc345ba1dc696ff9c6aaf3c698bacefea9.exe

  • Size

    1.1MB

  • MD5

    5b3c8242aab49db13a10b3454bf14ac8

  • SHA1

    9667f4b95635d6e464963b47a2b559ca8a6add94

  • SHA256

    81b49d3c6151419a242ba8491dff24bc345ba1dc696ff9c6aaf3c698bacefea9

  • SHA512

    4aa7493a8a978e67b3e7a6f2f6008b74ca92e7a2bf34846bec189180ffce1022c38b80af39d52713c36e026ff20c9e660c6f80157fc05de4c25b502f35a2be32

  • SSDEEP

    24576:mABwP/lOtVi7TlVvmgwdaeiQAAJLqnVd:5W4q5wg6HZJG

Malware Config

Extracted

Family

djvu

C2

http://dell1.ug/Asjd74ywuhodfgdfgpenelop5/45y87hzjdfg/get.php

Attributes
  • extension

    .boot

  • offline_id

    zZyLTRlsJ8hv1HPF6BPmiyHxTSON3B8vILboott1

  • payload_url

    http://dell1.ug/files/penelop/updatewin1.exe

    http://dell1.ug/files/penelop/updatewin2.exe

    http://dell1.ug/files/penelop/updatewin.exe

    http://dell1.ug/files/penelop/3.exe

    http://dell1.ug/files/penelop/4.exe

    http://dell1.ug/files/penelop/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-JeLOm18e5g 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: 0167A73uHsdfs89

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 6 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).

  • 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\81b49d3c6151419a242ba8491dff24bc345ba1dc696ff9c6aaf3c698bacefea9.exe
    "C:\Users\Admin\AppData\Local\Temp\81b49d3c6151419a242ba8491dff24bc345ba1dc696ff9c6aaf3c698bacefea9.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2204
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\3e666c5f-5590-4487-8f14-d01d30a69400" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:2560
    • C:\Users\Admin\AppData\Local\Temp\81b49d3c6151419a242ba8491dff24bc345ba1dc696ff9c6aaf3c698bacefea9.exe
      "C:\Users\Admin\AppData\Local\Temp\81b49d3c6151419a242ba8491dff24bc345ba1dc696ff9c6aaf3c698bacefea9.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:2500

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    2KB

    MD5

    ae5be677e505aec1d2ae6ac82539b2e8

    SHA1

    8b6d31dd6097a32b2f71c134da59f5c6c0cd5d99

    SHA256

    24239d4a210aa645caf5443aa0fabb214776179114e92cbb612ace0a26e3d09e

    SHA512

    fe526b2b092ff099f3f8f57717913ddbaabc7c26b3b6b8b206185aa5aba71e3ebf3f1e5d5f2eded0cc2fd4f7b428178800dad61b59e7aa9ce75c431e6a1801e8

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

    Filesize

    1KB

    MD5

    504452e286d17798b0d51ca0080164c3

    SHA1

    a11dc92b55de95ad2986441d1ed75db3dd22e808

    SHA256

    fe63fe6224da282d4844ada0e1fed31ca860cf603a1aaf817530900d6feeb130

    SHA512

    05403549d79f59ecb05183efb9f1f961a5b988d58e86a5f13966637da0289101252f963103f1974b7c99d08a924427739b8b23c533fdb7a100fac3a4a93853c6

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

    Filesize

    488B

    MD5

    b19d6774486a1e50ebbc6a5399d5aee1

    SHA1

    43b8f662756a8869bdde46f1dcf19a2c5ab16644

    SHA256

    f011c1ab0ad543ece08e801834d133bda11d999a8700914a689fd70c6f276348

    SHA512

    62fdfe764bd2ffb749b1ac0d6b98207afb316a13d8e23b4a7c027630ce46f65da47ac3e021ae071ede04a6e7daa9eb15915901efdb86b31b71c57dc0aa75c605

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

    Filesize

    344B

    MD5

    60b75f4496aed618fd2e80fc759392d0

    SHA1

    3843ca7fdef1609be00af79dffd8ae143f145c0f

    SHA256

    49cb453cf78f9498ba267b72067e02cd7e62462e89610ead544ab2a93a44bd3e

    SHA512

    2f1d7083b9e2958cb535213f9c5ca75f373fc7fdc0f4e2e11d4f848e4efdfc77fa2971237fb6cc99b60ca97ce76c83f559ce17335839744ebc9ac0384bb6ace7

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

    Filesize

    482B

    MD5

    ee3aee7d2014e62598ad6727d169ef48

    SHA1

    cf5efb840818f6df2e43fde8c0e038f04b0cde9b

    SHA256

    cd9c4d8c957ae5630110e4a8061b1391d27997bd2088026f8f7cd91a00ad0fa2

    SHA512

    4ecb428be29b43e40e49d8f68f36108a7f6fd8ea30de6a718a6b4d64f0d520a82e3e0faef6a5f995805d27810963f73976b2532179b09865d159fdcbd87ef817

  • C:\Users\Admin\AppData\Local\3e666c5f-5590-4487-8f14-d01d30a69400\81b49d3c6151419a242ba8491dff24bc345ba1dc696ff9c6aaf3c698bacefea9.exe

    Filesize

    1.1MB

    MD5

    5b3c8242aab49db13a10b3454bf14ac8

    SHA1

    9667f4b95635d6e464963b47a2b559ca8a6add94

    SHA256

    81b49d3c6151419a242ba8491dff24bc345ba1dc696ff9c6aaf3c698bacefea9

    SHA512

    4aa7493a8a978e67b3e7a6f2f6008b74ca92e7a2bf34846bec189180ffce1022c38b80af39d52713c36e026ff20c9e660c6f80157fc05de4c25b502f35a2be32

  • C:\Users\Admin\AppData\Local\Temp\Cab536F.tmp

    Filesize

    61KB

    MD5

    f3441b8572aae8801c04f3060b550443

    SHA1

    4ef0a35436125d6821831ef36c28ffaf196cda15

    SHA256

    6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

    SHA512

    5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

  • C:\Users\Admin\AppData\Local\Temp\Tar5891.tmp

    Filesize

    163KB

    MD5

    9441737383d21192400eca82fda910ec

    SHA1

    725e0d606a4fc9ba44aa8ffde65bed15e65367e4

    SHA256

    bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

    SHA512

    7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

  • memory/2204-4-0x0000000000400000-0x000000000053B000-memory.dmp

    Filesize

    1.2MB

  • memory/2204-2-0x00000000008D0000-0x0000000000994000-memory.dmp

    Filesize

    784KB

  • memory/2204-41-0x0000000003D50000-0x0000000003E8B000-memory.dmp

    Filesize

    1.2MB

  • memory/2204-1-0x00000000008D0000-0x0000000000994000-memory.dmp

    Filesize

    784KB

  • memory/2204-40-0x00000000009A0000-0x0000000000ABA000-memory.dmp

    Filesize

    1.1MB

  • memory/2204-3-0x00000000009A0000-0x0000000000ABA000-memory.dmp

    Filesize

    1.1MB

  • memory/2204-39-0x0000000000400000-0x000000000053B000-memory.dmp

    Filesize

    1.2MB

  • memory/2204-0-0x0000000000400000-0x000000000053B000-memory.dmp

    Filesize

    1.2MB

  • memory/2500-45-0x0000000000400000-0x000000000053B000-memory.dmp

    Filesize

    1.2MB

  • memory/2500-44-0x0000000000860000-0x0000000000924000-memory.dmp

    Filesize

    784KB

  • memory/2500-43-0x0000000000860000-0x0000000000924000-memory.dmp

    Filesize

    784KB

  • memory/2500-42-0x0000000000400000-0x000000000053B000-memory.dmp

    Filesize

    1.2MB

  • memory/2500-58-0x0000000000400000-0x000000000053B000-memory.dmp

    Filesize

    1.2MB

  • memory/2500-59-0x0000000000860000-0x0000000000924000-memory.dmp

    Filesize

    784KB