Analysis

  • max time kernel
    119s
  • max time network
    128s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    03-12-2021 15:27

General

  • Target

    ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809.exe

  • Size

    838KB

  • MD5

    6b99b83bb146ef0d9642727894d5be09

  • SHA1

    7b9326bb237885adb3d97ce71b2a3447c06f6d87

  • SHA256

    ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809

  • SHA512

    3e31c936ed32d842244cc61b5ea60bb4be2308ca653a7aadd9cfe5a1bcc5d045704f0993180287c60d0b47237d497d0b31debbaff3cdeb21c305bce042442a73

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .yqal

  • 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: 0356gSd743d

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\ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809.exe
    "C:\Users\Admin\AppData\Local\Temp\ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3000
    • C:\Users\Admin\AppData\Local\Temp\ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809.exe
      "C:\Users\Admin\AppData\Local\Temp\ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3500
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\1ee05bce-f99b-4567-9119-ccab34162f61" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3560
      • C:\Users\Admin\AppData\Local\Temp\ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809.exe
        "C:\Users\Admin\AppData\Local\Temp\ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:808
        • C:\Users\Admin\AppData\Local\Temp\ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809.exe
          "C:\Users\Admin\AppData\Local\Temp\ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:572

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

    6a4823dd14ee6616a4ef99d2bea9a44c

    SHA1

    1b0952c188fce7f3a0014cb473a80a66f3c71337

    SHA256

    cef0b13034255ff54ac6ee3a35c93cd92fe3d80e5793c2b5e63c0a42fcc3ff98

    SHA512

    a41d2a3f5c827518c102487af315e1303a50578eb258f65c17591eba0bc027ee2aa0a4941c494b9b5eb89842382f60ab3fec66e15a3f77cbf03cbae6dd9974c6

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

    efd1d8e8293f5bd8d688fef877221ccb

    SHA1

    55fd26b5c3ad5242aa08d1910c2e085d30489549

    SHA256

    43be67b3e85dd203dfabd04252b7b5a261b21ec846e11d760a4f07e70bf528c1

    SHA512

    755e7c67c4a0bc84debd21727d38dca438e7ea3ac8dc98b5f4140ae3f5de32c34aacd63c7cbfb110e1a2d3859089317a4401e07b7db5c36d2d167d9b764ec2cb

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

    23ce5ca3690461117efdb6d34475c79b

    SHA1

    a225ee2a8551a8acc7a0b20a5714fb9576322a27

    SHA256

    afd4dfa03cb45880e33ddbd5a825ea7ac8907028c1b1f9a2765cd194160f6509

    SHA512

    658e1ae79ba6f69cfdee037253bd64b73f9a8f802dd6ad4b1f81ae9bb2f9365e9ddb5157e2cc3e3f1c8410143ab9e146e67f2772c31d098d83aca1b3c2d96b95

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

    56be033b4fb085c71c435ba1d0f0d96b

    SHA1

    c51cbb498ccce03f2f208d46fe1cd87aa32002f6

    SHA256

    0c341906aa537233465f51990b9e5b29395f9059cb2a8d74d98fbe97f43bf010

    SHA512

    982890178d5680056fe3408eb71cd0416ae8dca12c667af14feadc2c6dcd0f6bd3919b3cdcd2880570f74df3d1cfd9bf8e2dd803185ac7c4d2bb448f7217cf2b

  • C:\Users\Admin\AppData\Local\1ee05bce-f99b-4567-9119-ccab34162f61\ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809.exe
    MD5

    6b99b83bb146ef0d9642727894d5be09

    SHA1

    7b9326bb237885adb3d97ce71b2a3447c06f6d87

    SHA256

    ba2ea65270314426a7b3b047913a3f00e6d62fe7e06518f3830b1b1b67307809

    SHA512

    3e31c936ed32d842244cc61b5ea60bb4be2308ca653a7aadd9cfe5a1bcc5d045704f0993180287c60d0b47237d497d0b31debbaff3cdeb21c305bce042442a73

  • memory/572-125-0x0000000000424141-mapping.dmp
  • memory/572-130-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/808-122-0x0000000000000000-mapping.dmp
  • memory/3000-115-0x00000000006EF000-0x0000000000781000-memory.dmp
    Filesize

    584KB

  • memory/3000-116-0x00000000009D0000-0x0000000000AEB000-memory.dmp
    Filesize

    1.1MB

  • memory/3500-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3500-118-0x0000000000424141-mapping.dmp
  • memory/3500-117-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3560-120-0x0000000000000000-mapping.dmp