Analysis

  • max time kernel
    121s
  • max time network
    128s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    11-11-2021 10:30

General

  • Target

    8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08.exe

  • Size

    854KB

  • MD5

    0234906bd8c79cc6ada2772c00620879

  • SHA1

    f7d456fec5c1b14ba4b7ff37401b1993ef692e6d

  • SHA256

    8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08

  • SHA512

    ef4282941ebff2b40b0071f22d3e51ef669f95c0f9388f9c132ef83d937882d10681a74f91c3a1c4fd2d33a53472d0a459d253ea88a077f776382b2b9aaa3a63

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .qdla

  • 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: 0347gSd743d

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\8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08.exe
    "C:\Users\Admin\AppData\Local\Temp\8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4088
    • C:\Users\Admin\AppData\Local\Temp\8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08.exe
      "C:\Users\Admin\AppData\Local\Temp\8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:820
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\fe2a5342-1622-4196-b02b-e08b84bbd1e6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3852
      • C:\Users\Admin\AppData\Local\Temp\8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08.exe
        "C:\Users\Admin\AppData\Local\Temp\8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:756
        • C:\Users\Admin\AppData\Local\Temp\8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08.exe
          "C:\Users\Admin\AppData\Local\Temp\8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:800

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

    f00c2b4bf786c0d6b13eb366c22e7bc4

    SHA1

    973a5037a282b96e7680f11e128565fc48456e25

    SHA256

    1b66f275d87f088e8ff39ffd00f332829aaaae9b37e310596e96a0eb511bd4ad

    SHA512

    51e1c542335f6778431ab025196a042a45645a37f9d5a20c7405ec4a0dc04c5da1263c6fa99b4548cf1f79251d0aeece34124870dd9227400c929e6bbcd5ace8

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

    071bfe264706744dfab2bf5005a291c6

    SHA1

    2461a132440fe99e36b970e4a91975733d8cf93e

    SHA256

    ecdf82cb9fa06753ba5472b4b3595e0f562c8803bd56b2f5610648727c88361c

    SHA512

    d06bce698c5bc94ad4b1f26e01afd02a8ea4956e7f6dad18331c42cbd3f205f1815f5a410594e0dc7f027d140c25d9c78871e1e38316a1da1cb385970dc9b919

  • C:\Users\Admin\AppData\Local\fe2a5342-1622-4196-b02b-e08b84bbd1e6\8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08.exe
    MD5

    0234906bd8c79cc6ada2772c00620879

    SHA1

    f7d456fec5c1b14ba4b7ff37401b1993ef692e6d

    SHA256

    8c16365aa9c6c8b6cc03f6c01b60e680ada1f2cb5ab840df2c0ae1c305071f08

    SHA512

    ef4282941ebff2b40b0071f22d3e51ef669f95c0f9388f9c132ef83d937882d10681a74f91c3a1c4fd2d33a53472d0a459d253ea88a077f776382b2b9aaa3a63

  • memory/756-125-0x0000000000000000-mapping.dmp
  • memory/756-126-0x0000000002E54000-0x0000000002EE5000-memory.dmp
    Filesize

    580KB

  • memory/800-128-0x0000000000424141-mapping.dmp
  • memory/800-129-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/820-124-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/820-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/820-120-0x0000000000424141-mapping.dmp
  • memory/3852-122-0x0000000000000000-mapping.dmp
  • memory/4088-118-0x00000000047EC000-0x000000000487D000-memory.dmp
    Filesize

    580KB

  • memory/4088-121-0x0000000004880000-0x000000000499B000-memory.dmp
    Filesize

    1.1MB