Analysis

  • max time kernel
    112s
  • max time network
    121s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    11-11-2021 10:23

General

  • Target

    d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6.exe

  • Size

    854KB

  • MD5

    a6302fea85ed3f4e505cd5751ca5b9c7

  • SHA1

    9c7db8e46dbb562ab4be33a499c9d4fa30a75172

  • SHA256

    d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6

  • SHA512

    a33dea96679bab9bc2a98325898ff04c5a166a9a8ad799afd55375b0547c153a2136e404ea0ada1620f39e34f9a0b84d4b47545695a95fd4eafa177eb3384378

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .qmak

  • offline_id

    mGOVYjwKN5zpBZyRsr2Nqza9xnxDzO1NGhAl47t1

  • payload_url

    http://kotob.top/dl/build2.exe

    http://pqkl.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-W7mpKFSSv2 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: manager@mailtemp.ch Reserve e-mail address to contact us: helprestoremanager@airmail.cc Your personal ID: 0348gSd743d

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\d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6.exe
    "C:\Users\Admin\AppData\Local\Temp\d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3044
    • C:\Users\Admin\AppData\Local\Temp\d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6.exe
      "C:\Users\Admin\AppData\Local\Temp\d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2760
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\432d7a55-2c21-46fb-8644-69980109aa17" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2656
      • C:\Users\Admin\AppData\Local\Temp\d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6.exe
        "C:\Users\Admin\AppData\Local\Temp\d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1304
        • C:\Users\Admin\AppData\Local\Temp\d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6.exe
          "C:\Users\Admin\AppData\Local\Temp\d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3164

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

    d8ec7917c33f103a7288af33cae7de14

    SHA1

    285babb225e06e84a4050f140d21970ecd9d39ee

    SHA256

    467d7ceb2f929daba1e910064fad42123bb2ecd65f57423900bb3777e88b7e89

    SHA512

    9accf32dbfd9260dbfee95982c6487882828f86f3e090f598d6f426760c093886ba68ec664b7db942027320c1eb95029c45c98ea139308a491d0b15dab6aad79

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

    026c2a59b797991b8379df56c6ea513a

    SHA1

    266a2e055410708de4db7e704b4ed449006a1f2b

    SHA256

    21ed5e42cf0d63dffeb9e5d3711e6b760f84d8c8c1715d5f8bf9ea047a1dbabe

    SHA512

    809116817fd88a722ccaa7703a850e103e034aa20b351f50f5b29ee198352568a6aa06cd78b75c19e03757230d30058366f3c25aa043c02d9f7d5301f457cb80

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

    442f3e63c839e084c86a37ab048e0710

    SHA1

    8bf476ad5a738f5a0df899b09fcd94f744a27a90

    SHA256

    55f853690ae63f043eba17c4fb9f4750f8e8fa02a9a3e89f18e07545e703ebba

    SHA512

    d32b1a3989cee95e9447c502763596a2bfdb1b07837d112bc2df63160a3010f8cfe5d4d1c46c13f2707845ae80e0474a79fd4d9f7457e4d696e7a249f2b802e7

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

    9a7fb0ef5f9beac856bfbd8418b6765b

    SHA1

    0af583a03be9fbbbd8779d30d001ced55aa17d26

    SHA256

    0bb36a53b0b3ebe12e6ff0772550a76665892b9c753bb5ad6bfb7d9e4be145e0

    SHA512

    9084414178722e70072d572e67a1ae3cb4550dcd38a9aca5e50bc9cf8af4e45ff85d143fea3d98e588933164c439850121cfeb182ddde075a053004a100b1b8b

  • C:\Users\Admin\AppData\Local\432d7a55-2c21-46fb-8644-69980109aa17\d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6.exe
    MD5

    a6302fea85ed3f4e505cd5751ca5b9c7

    SHA1

    9c7db8e46dbb562ab4be33a499c9d4fa30a75172

    SHA256

    d74d5bef2452c3848115df8db591b3986f449c62b1d8a3fd5d685eb1e9ab40c6

    SHA512

    a33dea96679bab9bc2a98325898ff04c5a166a9a8ad799afd55375b0547c153a2136e404ea0ada1620f39e34f9a0b84d4b47545695a95fd4eafa177eb3384378

  • memory/1304-123-0x00000000048C6000-0x0000000004957000-memory.dmp
    Filesize

    580KB

  • memory/1304-122-0x0000000000000000-mapping.dmp
  • memory/2656-120-0x0000000000000000-mapping.dmp
  • memory/2760-118-0x0000000000424141-mapping.dmp
  • memory/2760-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2760-117-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3044-115-0x000000000495A000-0x00000000049EB000-memory.dmp
    Filesize

    580KB

  • memory/3044-116-0x00000000049F0000-0x0000000004B0B000-memory.dmp
    Filesize

    1.1MB

  • memory/3164-125-0x0000000000424141-mapping.dmp
  • memory/3164-130-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB