Analysis

  • max time kernel
    132s
  • max time network
    133s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    29-11-2021 03:51

General

  • Target

    445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784.exe

  • Size

    846KB

  • MD5

    fcdf499b0dfa16a745f5b4005b83a483

  • SHA1

    c5321dafd9ef34cea7c9ef0e054d694a698e8a39

  • SHA256

    445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784

  • SHA512

    7fc2da1d21e893ffdfab5eb140b55675c81c1ea16e1598f3cbf61003ce08de99c20afed854fd430838cd9bd21dd603c00d03adb19ed355e60af0025f12d5612b

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .robm

  • offline_id

    Z5GGASEfY71jtxU3i3E8kzvrTJmY9oiZkjcSm0t1

  • 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-Tjb0YqckGX 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: 0354gSd743d

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.

  • 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\445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784.exe
    "C:\Users\Admin\AppData\Local\Temp\445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2808
    • C:\Users\Admin\AppData\Local\Temp\445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784.exe
      "C:\Users\Admin\AppData\Local\Temp\445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2696
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\e33c132c-9904-4c96-962e-03fbb4828547" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:800
      • C:\Users\Admin\AppData\Local\Temp\445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784.exe
        "C:\Users\Admin\AppData\Local\Temp\445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:812
        • C:\Users\Admin\AppData\Local\Temp\445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784.exe
          "C:\Users\Admin\AppData\Local\Temp\445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3268

Network

MITRE ATT&CK Enterprise v6

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

    6f71b47e78334cf18e03d98fa3ef98cd

    SHA1

    a1a714f5f108bfa435390054b04000f47b9ad277

    SHA256

    41e804095dc42c695ccde8f5ef796fec3e842f3306ad1208d8b8e5fc9304e475

    SHA512

    4edea70fd65d16a61c8ebab907f67ab77902e1dfed6b61c045700146dbb2c6b6ebd6693609e7d52353c2fbd8ac1b6f1ca7873c549c85282623a875911b9b4acb

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

    MD5

    917bbea84f8b0054bd9ca1bf61a0187f

    SHA1

    20bb19d2cdb9d92a9620623cbb97d0834b9157e4

    SHA256

    f34a6af2f4ecbad6902aed202b503cf9fbfaa1e38c32863f63f19e384f1e8a65

    SHA512

    d308746d9bcd1888e8d5c5aacb0ddd0f2da50188c6be7fbd7ddfaeca3e6d7769c117567077bf2dbd0a14dd47e38a8ab4a9d615b13c92d0bee14df1ee8a9c248d

  • C:\Users\Admin\AppData\Local\e33c132c-9904-4c96-962e-03fbb4828547\445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784.exe

    MD5

    fcdf499b0dfa16a745f5b4005b83a483

    SHA1

    c5321dafd9ef34cea7c9ef0e054d694a698e8a39

    SHA256

    445ab4c4531ef255deb0ac9d90de7c7c5c3f67fe65a0b8f2a7f1c0e8c3297784

    SHA512

    7fc2da1d21e893ffdfab5eb140b55675c81c1ea16e1598f3cbf61003ce08de99c20afed854fd430838cd9bd21dd603c00d03adb19ed355e60af0025f12d5612b

  • memory/800-120-0x0000000000000000-mapping.dmp

  • memory/812-123-0x00000000037E8000-0x0000000003879000-memory.dmp

    Filesize

    580KB

  • memory/812-122-0x0000000000000000-mapping.dmp

  • memory/2696-117-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2696-119-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2696-118-0x0000000000424141-mapping.dmp

  • memory/2808-115-0x0000000003722000-0x00000000037B3000-memory.dmp

    Filesize

    580KB

  • memory/2808-116-0x0000000003900000-0x0000000003A1B000-memory.dmp

    Filesize

    1.1MB

  • memory/3268-125-0x0000000000424141-mapping.dmp

  • memory/3268-126-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB