Analysis

  • max time kernel
    18s
  • max time network
    290s
  • platform
    windows10-1703_x64
  • resource
    win10-20231215-en
  • resource tags

    arch:x64arch:x86image:win10-20231215-enlocale:en-usos:windows10-1703-x64system
  • submitted
    08/01/2024, 05:00

General

  • Target

    cde358c9cbfcbdb539b7f3c13174bd75657ec9d65eddf472c3895735a71128c4.exe

  • Size

    700KB

  • MD5

    c5874fc9ec42c57284cd093aceb37a65

  • SHA1

    f89d16bde4bcd7509a7a8dd4c813f40b283cdfac

  • SHA256

    cde358c9cbfcbdb539b7f3c13174bd75657ec9d65eddf472c3895735a71128c4

  • SHA512

    6a405bb11abb667f001a832551c8de2b2883d910be51ef80f873d0ff7c47537ab6522e77bbca4592e5c9d264c36e506197fb7e166bf75d767245b47d3622aedd

  • SSDEEP

    12288:cKwAMYEYALwSNsX6ILzHg18QfiIVnt8Hl6PbGiaBROGSt:n/EYawTzLLgFfpht8FYG1BR

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test1/get.php

Attributes
  • extension

    .cdwe

  • offline_id

    dSwr1XNNi5cIitB5eDPbMANcusB1dWGDB8ToUnt1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://zexeq.com/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-e21iz7dS58 Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0842ASdw

rsa_pubkey.plain

Signatures

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 16 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • 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).

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cde358c9cbfcbdb539b7f3c13174bd75657ec9d65eddf472c3895735a71128c4.exe
    "C:\Users\Admin\AppData\Local\Temp\cde358c9cbfcbdb539b7f3c13174bd75657ec9d65eddf472c3895735a71128c4.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3516
    • C:\Users\Admin\AppData\Local\Temp\cde358c9cbfcbdb539b7f3c13174bd75657ec9d65eddf472c3895735a71128c4.exe
      "C:\Users\Admin\AppData\Local\Temp\cde358c9cbfcbdb539b7f3c13174bd75657ec9d65eddf472c3895735a71128c4.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:220
      • C:\Users\Admin\AppData\Local\Temp\cde358c9cbfcbdb539b7f3c13174bd75657ec9d65eddf472c3895735a71128c4.exe
        "C:\Users\Admin\AppData\Local\Temp\cde358c9cbfcbdb539b7f3c13174bd75657ec9d65eddf472c3895735a71128c4.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
          PID:4344
          • C:\Users\Admin\AppData\Local\Temp\cde358c9cbfcbdb539b7f3c13174bd75657ec9d65eddf472c3895735a71128c4.exe
            "C:\Users\Admin\AppData\Local\Temp\cde358c9cbfcbdb539b7f3c13174bd75657ec9d65eddf472c3895735a71128c4.exe" --Admin IsNotAutoStart IsNotTask
            4⤵
              PID:4684
              • C:\Users\Admin\AppData\Local\6340a5ee-bf7f-4c4c-8bde-516065591ebd\build2.exe
                "C:\Users\Admin\AppData\Local\6340a5ee-bf7f-4c4c-8bde-516065591ebd\build2.exe"
                5⤵
                  PID:4568
                  • C:\Users\Admin\AppData\Local\6340a5ee-bf7f-4c4c-8bde-516065591ebd\build2.exe
                    "C:\Users\Admin\AppData\Local\6340a5ee-bf7f-4c4c-8bde-516065591ebd\build2.exe"
                    6⤵
                      PID:4604
                      • C:\Windows\SysWOW64\WerFault.exe
                        C:\Windows\SysWOW64\WerFault.exe -u -p 4604 -s 1148
                        7⤵
                        • Program crash
                        PID:4692
                  • C:\Users\Admin\AppData\Local\6340a5ee-bf7f-4c4c-8bde-516065591ebd\build3.exe
                    "C:\Users\Admin\AppData\Local\6340a5ee-bf7f-4c4c-8bde-516065591ebd\build3.exe"
                    5⤵
                      PID:3232
                      • C:\Users\Admin\AppData\Local\6340a5ee-bf7f-4c4c-8bde-516065591ebd\build3.exe
                        "C:\Users\Admin\AppData\Local\6340a5ee-bf7f-4c4c-8bde-516065591ebd\build3.exe"
                        6⤵
                          PID:4228
                          • C:\Windows\SysWOW64\schtasks.exe
                            /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
                            7⤵
                            • Creates scheduled task(s)
                            PID:4036
                  • C:\Windows\SysWOW64\icacls.exe
                    icacls "C:\Users\Admin\AppData\Local\879167c5-2992-46c1-93cb-eefdec05d5f1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
                    3⤵
                    • Modifies file permissions
                    PID:1704
              • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                1⤵
                  PID:4412
                  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                    2⤵
                      PID:2436
                  • C:\Windows\SysWOW64\schtasks.exe
                    /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
                    1⤵
                    • Creates scheduled task(s)
                    PID:3064
                  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                    1⤵
                      PID:1516
                      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                        2⤵
                        • Suspicious use of SetThreadContext
                        • Suspicious use of WriteProcessMemory
                        PID:4344
                    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                      1⤵
                        PID:2480
                        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                          2⤵
                            PID:812
                        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                          1⤵
                            PID:1012
                            • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                              C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
                              2⤵
                                PID:4428

                            Network

                                  MITRE ATT&CK Enterprise v15

                                  Replay Monitor

                                  Loading Replay Monitor...

                                  Downloads

                                  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

                                    Filesize

                                    1KB

                                    MD5

                                    60a5e0473de1471940dbbea528dd3e33

                                    SHA1

                                    40b5e0f3932093d5106d1bf53a912c6cd48e1e9a

                                    SHA256

                                    6f76f374963b90b7a8e18c72f40f8836ccef657a08530bf6539ea5bd03dbc494

                                    SHA512

                                    1b18e92207cb28cef1def502ad7c8a380deada35e727421b5fadf0c8f32af39675009da07aa4fdbeb4693b516b354d0d369faf96f8f39a53b8ed81680eae5c30

                                  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

                                    Filesize

                                    724B

                                    MD5

                                    8202a1cd02e7d69597995cabbe881a12

                                    SHA1

                                    8858d9d934b7aa9330ee73de6c476acf19929ff6

                                    SHA256

                                    58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

                                    SHA512

                                    97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

                                  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

                                    Filesize

                                    410B

                                    MD5

                                    f0eff624eb476736d4784bf9786625f5

                                    SHA1

                                    023fa9128f4cd4064ffd3d53208baa727b8beb04

                                    SHA256

                                    353dd36a7e0adc9e16ecbee63b8b5e5cbb2e3c1593e2c368ce222f441108b96b

                                    SHA512

                                    d690de2ed46293bfdd879b81193cd19b0b1d501322cd511bca21e83cc58c06cdcbd6a9a4304a087baf6bd2119efb63f70ac6d8bbaa52f324cb70359d59d48afd

                                  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

                                    Filesize

                                    392B

                                    MD5

                                    cb9ae359c2744c5339bc957ce0e74d5d

                                    SHA1

                                    1b356c7c9eefeb761b5b6dcc62ebf85177396b78

                                    SHA256

                                    2374e0aa343358a2f6f886169e02a68ba06c0265576a8d9f9c9183b61d42328e

                                    SHA512

                                    e021eecdcb417d4180f0c0ba1de4060002e3289d939018cba1eba314d28f4cba07896fd9763be1461251f85c2e7f69e4e95588b0f41ea434c3ec9b458b94bb63

                                  • C:\Users\Admin\AppData\Local\6340a5ee-bf7f-4c4c-8bde-516065591ebd\build3.exe

                                    Filesize

                                    299KB

                                    MD5

                                    41b883a061c95e9b9cb17d4ca50de770

                                    SHA1

                                    1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

                                    SHA256

                                    fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

                                    SHA512

                                    cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

                                  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

                                    Filesize

                                    34KB

                                    MD5

                                    b72948bb7782d18869358f826205d6bf

                                    SHA1

                                    fefa2a7c4b7985e73621555a3445698a7d2eccf4

                                    SHA256

                                    5cb93196854a2795d397da2a630a869aab8fe626ac4c163c5aa68fff279eaa9c

                                    SHA512

                                    bd75b1c1c6976aee54039ac58cc6276c23fd1d2815f719d55e96ad6d8139ae2a3ca282e3e5af72354c65f43d9d50afefdff4b9348bf9267795f0d7eb91951ae0

                                  • memory/220-6-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/220-5-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/220-4-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/220-2-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/220-17-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/1012-176-0x0000000000A1E000-0x0000000000A2E000-memory.dmp

                                    Filesize

                                    64KB

                                  • memory/1516-122-0x000000000089E000-0x00000000008AE000-memory.dmp

                                    Filesize

                                    64KB

                                  • memory/2480-150-0x000000000088E000-0x000000000089E000-memory.dmp

                                    Filesize

                                    64KB

                                  • memory/3232-84-0x00000000001F0000-0x00000000001F4000-memory.dmp

                                    Filesize

                                    16KB

                                  • memory/3232-74-0x00000000001F0000-0x00000000001F4000-memory.dmp

                                    Filesize

                                    16KB

                                  • memory/3232-73-0x0000000000980000-0x0000000000A80000-memory.dmp

                                    Filesize

                                    1024KB

                                  • memory/3516-1-0x0000000002570000-0x0000000002605000-memory.dmp

                                    Filesize

                                    596KB

                                  • memory/3516-3-0x00000000026B0000-0x00000000027CB000-memory.dmp

                                    Filesize

                                    1.1MB

                                  • memory/4228-69-0x0000000000400000-0x0000000000406000-memory.dmp

                                    Filesize

                                    24KB

                                  • memory/4228-75-0x0000000000400000-0x0000000000406000-memory.dmp

                                    Filesize

                                    24KB

                                  • memory/4228-77-0x0000000000400000-0x0000000000406000-memory.dmp

                                    Filesize

                                    24KB

                                  • memory/4344-20-0x0000000000A70000-0x0000000000B09000-memory.dmp

                                    Filesize

                                    612KB

                                  • memory/4412-99-0x000000000083A000-0x000000000084A000-memory.dmp

                                    Filesize

                                    64KB

                                  • memory/4568-57-0x0000000000B70000-0x0000000000C70000-memory.dmp

                                    Filesize

                                    1024KB

                                  • memory/4568-60-0x00000000009B0000-0x00000000009DA000-memory.dmp

                                    Filesize

                                    168KB

                                  • memory/4604-67-0x0000000000400000-0x000000000063D000-memory.dmp

                                    Filesize

                                    2.2MB

                                  • memory/4604-62-0x0000000000400000-0x000000000063D000-memory.dmp

                                    Filesize

                                    2.2MB

                                  • memory/4604-56-0x0000000000400000-0x000000000063D000-memory.dmp

                                    Filesize

                                    2.2MB

                                  • memory/4604-61-0x0000000000400000-0x000000000063D000-memory.dmp

                                    Filesize

                                    2.2MB

                                  • memory/4684-37-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/4684-34-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/4684-36-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/4684-38-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/4684-30-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/4684-52-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/4684-29-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/4684-22-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/4684-24-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB

                                  • memory/4684-23-0x0000000000400000-0x0000000000537000-memory.dmp

                                    Filesize

                                    1.2MB