Analysis

  • max time kernel
    129s
  • max time network
    129s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    29-11-2021 17:24

General

  • Target

    973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe.exe

  • Size

    853KB

  • MD5

    b5bc04503aaeef0eae6bbde03253c6c2

  • SHA1

    80f403dfbd793fa918efa484698493e0cfa0a371

  • SHA256

    973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe

  • SHA512

    d9974c2a227465bb6d38d05e78c3de4905ee825bd3149f58b9586f6bfedee3c6fea5dc7ef5a29bde72d1cd6b7ba6d5ac5fe67b7da35e6e360783e0e7b2ce7e04

Malware Config

Extracted

Family

djvu

C2

http://tzgl.org/fhsgtsspen6/get.php

Attributes
  • extension

    .moia

  • 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: 0355gSd743d

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\973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe.exe
    "C:\Users\Admin\AppData\Local\Temp\973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2640
    • C:\Users\Admin\AppData\Local\Temp\973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe.exe
      "C:\Users\Admin\AppData\Local\Temp\973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:772
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\e3a23f4a-beba-4e61-9aac-e9612e58100b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1004
      • C:\Users\Admin\AppData\Local\Temp\973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe.exe
        "C:\Users\Admin\AppData\Local\Temp\973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3224
        • C:\Users\Admin\AppData\Local\Temp\973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe.exe
          "C:\Users\Admin\AppData\Local\Temp\973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1916

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

    e15da05c12224abc690b1eb313a20137

    SHA1

    80f6284e35fa09eda4e69a5a866f052c9077e1f1

    SHA256

    9708014af393827b1df1614e6d4d99de56f13fbda613e2ead63416a9c2c6e31c

    SHA512

    4d41f757804943d5344476747024dd94aaa6d414d9b1652f9865927234d40c271a42468cde38c2bd68f6e833783ae8ea93727d2eb9e8c24263673eb8dd6b9937

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

    2bef96fbf39da6a765ed4d36db41fc5a

    SHA1

    af8b93b370a8bfd932552f840d54da310b51c071

    SHA256

    9cf840b96cb69e5c7f2b93630f63e44c20ba7240ce29ffa7e5de6e648c57d3c8

    SHA512

    a05166997abf2f29a1867f2ed649555eb5b153448087025b0d1a77cc14f78da0052a81bfd44d360731ca8b6520646b0d3e51e8fbbc2e045b990505dd46fa24d7

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

    8fbe3a560f521e86ea2395632a5274bd

    SHA1

    6bd199189efb6d2a74a9562a8605058935173ac2

    SHA256

    d86376a92d1cc9dfbc82649a8e17965f3745e7b4e1f4781b5039132b4fd31eee

    SHA512

    a1dc22fd726b775a90f497c51dcd657da5eed0cac5c4859be778e082327092faef888c826f57cf81a18c39524326193edacd81c9a7b34e379a56d49052739a40

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

    3cd8eae20d0aa7993c5caf7994ab06a1

    SHA1

    f7caab4720747d9021d4a7e29388bf2debd60898

    SHA256

    7293065b29ccab4df9ca641451123828c66725ca6b3495b89c060f456896cd48

    SHA512

    c1bfb5f8c0028dd83eff7e403be944a09ecd1dad7fd4889a36c2b7e6ba1be9ef2b6f13427d7a2f92eb4893ea91e08bd9ccee2439da26dc81e536cb7d07623576

  • C:\Users\Admin\AppData\Local\e3a23f4a-beba-4e61-9aac-e9612e58100b\973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe.exe
    MD5

    b5bc04503aaeef0eae6bbde03253c6c2

    SHA1

    80f403dfbd793fa918efa484698493e0cfa0a371

    SHA256

    973b8fb7b2555ddefbf2dc761f64f4ac74d161260f4c24118e6b1e6c04bc9efe

    SHA512

    d9974c2a227465bb6d38d05e78c3de4905ee825bd3149f58b9586f6bfedee3c6fea5dc7ef5a29bde72d1cd6b7ba6d5ac5fe67b7da35e6e360783e0e7b2ce7e04

  • memory/772-118-0x0000000000424141-mapping.dmp
  • memory/772-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/772-117-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1004-120-0x0000000000000000-mapping.dmp
  • memory/1916-125-0x0000000000424141-mapping.dmp
  • memory/1916-126-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2640-115-0x0000000003751000-0x00000000037E3000-memory.dmp
    Filesize

    584KB

  • memory/2640-116-0x00000000037F0000-0x000000000390B000-memory.dmp
    Filesize

    1.1MB

  • memory/3224-122-0x0000000000000000-mapping.dmp
  • memory/3224-123-0x000000000365B000-0x00000000036ED000-memory.dmp
    Filesize

    584KB