Analysis

  • max time kernel
    63s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    29-12-2022 23:59

General

  • Target

    cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6.exe

  • Size

    807KB

  • MD5

    50da2529025604e6a78c06a73a43e1ac

  • SHA1

    db1494110bf45a6ad396378a413a37ba34a30521

  • SHA256

    cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6

  • SHA512

    8c2652872a68cde59355fa593b4aea494692a42fea6015d9b4a85796811e55bd1f5e3f0b32754e89e5aefb3556669d635dbaf71de215dd163c35960dc8698e5c

  • SSDEEP

    12288:ZoJC2RunI3sjjEL8zAmIXwCpWsfYni4kTMsqoKlWc09k4BjdYU:M0I36ayDapYndkDqoKlWc09k4BBY

Malware Config

Extracted

Family

djvu

C2

http://ex3mall.com/test1/get.php

Attributes
  • extension

    .znsm

  • offline_id

    bE95c2N1x4fARf4W3qmFCjkKPwfFkQaU9NpNBMt1

  • payload_url

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

    http://ex3mall.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-OKSOfVy04R 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: 0623Sduef

rsa_pubkey.plain

Extracted

Family

vidar

Version

1.7

Botnet

19

C2

https://t.me/robloxblackl

https://steamcommunity.com/profiles/76561199458928097

Attributes
  • profile_id

    19

Signatures

  • Detected Djvu ransomware 10 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
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 4 IoCs
  • 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 60 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6.exe
    "C:\Users\Admin\AppData\Local\Temp\cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1720
    • C:\Users\Admin\AppData\Local\Temp\cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6.exe
      "C:\Users\Admin\AppData\Local\Temp\cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:628
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\a131ad9a-4964-4732-93f2-595a570c7558" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1524
      • C:\Users\Admin\AppData\Local\Temp\cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6.exe
        "C:\Users\Admin\AppData\Local\Temp\cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1008
        • C:\Users\Admin\AppData\Local\Temp\cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6.exe
          "C:\Users\Admin\AppData\Local\Temp\cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2036
          • C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build2.exe
            "C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1504
            • C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build2.exe
              "C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:2044
          • C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build3.exe
            "C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:1004
            • 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"
              6⤵
              • Creates scheduled task(s)
              PID:1576
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {7EC42565-F449-4C71-8633-489F452E3E7C} S-1-5-21-4063495947-34355257-727531523-1000:RYNKSFQE\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1720
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:744
      • 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"
        3⤵
        • Creates scheduled task(s)
        PID:700

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

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
    Filesize

    2KB

    MD5

    9d77c9193735a61912ff3bccb47168a7

    SHA1

    aee81c528117867ca69f22f93aa2ca710f908b6e

    SHA256

    79b78c9e1d9c4fb6c08413757fee9d3d2fdb15415f6b8b9cd9c3bd67a235ba95

    SHA512

    c70ae8ed0d68f38b217f4b6ac809050f27f71e6de140712c56ecf7c55896ae518993c55193bc282097580a3f7c869424789aa3c3cc8ecc81c394f8e15c1f77bb

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
    Filesize

    61KB

    MD5

    fc4666cbca561e864e7fdf883a9e6661

    SHA1

    2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

    SHA256

    10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

    SHA512

    c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

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

    1KB

    MD5

    a2b3de2676790ac64a1bc51ba3e667d1

    SHA1

    2a7f7090fed2ddd299339197428a9fafc3fd349b

    SHA256

    aa8cdcc9c8c19d24037aa62dfb529b22d25a7eb3927d35f59572c153c81c5a4a

    SHA512

    ab9e80a077a2fe486630e4d7fb159994224fce41c6fbc6197cc600e4fac86d504e8b3d1670ca628fb45792498be42a80e1c6b0af4b3e7451bc039222ea123ef5

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

    488B

    MD5

    63f6d5c2e144027cf1419d79f87e0d5e

    SHA1

    8b47ffeee31f850042ea496e388388942cf41b9a

    SHA256

    f96eecf52ef56ec4447ddfe7e606949ef7c524cb9658225e9365ed70f9b7dd48

    SHA512

    538376b0b14a4f64774d443fc902e5395e4189437ee1293e04de7d39a1da0820da0c0cf81afaa8a71d33f426c72064a0643a5b9193e8a19fbf79067b2254d3d0

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
    Filesize

    304B

    MD5

    069f2c635e180c5a6276e1b7d2a44ee1

    SHA1

    a7baff4e55254899f9b85904530a405aa4ebc62f

    SHA256

    cfd935bf69e14265b2d7f084ddce7a4f15793c50793e096abeb19c665777179f

    SHA512

    0da6a69ea1338300f550868bdc634617b5d5b831043e62dff264a8e376828912fb66ebeef04304d9d0130e3cbfcc2d5cd19145687dc344a42b03297e71127973

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

    482B

    MD5

    451a5624fdec64d06213b17b4632e054

    SHA1

    655a0bb24f13e305695784c1f45487afb8130d5d

    SHA256

    33d08148d9f7ddf1fbce5f976ef9312bfbed9f2e26b63dc663df58a2ff24b798

    SHA512

    a16008003df18449888a86fee53d94e87a876ee0adb76cc1403cffa7297ce3c4b879f9859769c7ab3182cbeed59c30e877e443b12274313d633efa8ee87cccf3

  • C:\Users\Admin\AppData\Local\a131ad9a-4964-4732-93f2-595a570c7558\cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6.exe
    Filesize

    807KB

    MD5

    50da2529025604e6a78c06a73a43e1ac

    SHA1

    db1494110bf45a6ad396378a413a37ba34a30521

    SHA256

    cb0567590c710f7eba3c49de82300d1fa12d5ac88d9e433e7836ff37a1341ca6

    SHA512

    8c2652872a68cde59355fa593b4aea494692a42fea6015d9b4a85796811e55bd1f5e3f0b32754e89e5aefb3556669d635dbaf71de215dd163c35960dc8698e5c

  • C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build2.exe
    Filesize

    407KB

    MD5

    3b6782cde711c6e73e09611c5041060e

    SHA1

    412d9f6e64ebee4287eccff782f04943e5381d4f

    SHA256

    740912c948f5c370a23fa34da6fca7ffa1abc420edefcbe3c7a74170c9f47e8c

    SHA512

    d7883a046d9b153094f9f3e5970b78a9084de8472d219a325006a7652cdf5427641a0c10beef4aceaa4ad9d92ea1a2ccf8104588e51760200e7e85be37524c4e

  • C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build2.exe
    Filesize

    407KB

    MD5

    3b6782cde711c6e73e09611c5041060e

    SHA1

    412d9f6e64ebee4287eccff782f04943e5381d4f

    SHA256

    740912c948f5c370a23fa34da6fca7ffa1abc420edefcbe3c7a74170c9f47e8c

    SHA512

    d7883a046d9b153094f9f3e5970b78a9084de8472d219a325006a7652cdf5427641a0c10beef4aceaa4ad9d92ea1a2ccf8104588e51760200e7e85be37524c4e

  • C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build2.exe
    Filesize

    407KB

    MD5

    3b6782cde711c6e73e09611c5041060e

    SHA1

    412d9f6e64ebee4287eccff782f04943e5381d4f

    SHA256

    740912c948f5c370a23fa34da6fca7ffa1abc420edefcbe3c7a74170c9f47e8c

    SHA512

    d7883a046d9b153094f9f3e5970b78a9084de8472d219a325006a7652cdf5427641a0c10beef4aceaa4ad9d92ea1a2ccf8104588e51760200e7e85be37524c4e

  • C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build3.exe
    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build3.exe
    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

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

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

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

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • \Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build2.exe
    Filesize

    407KB

    MD5

    3b6782cde711c6e73e09611c5041060e

    SHA1

    412d9f6e64ebee4287eccff782f04943e5381d4f

    SHA256

    740912c948f5c370a23fa34da6fca7ffa1abc420edefcbe3c7a74170c9f47e8c

    SHA512

    d7883a046d9b153094f9f3e5970b78a9084de8472d219a325006a7652cdf5427641a0c10beef4aceaa4ad9d92ea1a2ccf8104588e51760200e7e85be37524c4e

  • \Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build2.exe
    Filesize

    407KB

    MD5

    3b6782cde711c6e73e09611c5041060e

    SHA1

    412d9f6e64ebee4287eccff782f04943e5381d4f

    SHA256

    740912c948f5c370a23fa34da6fca7ffa1abc420edefcbe3c7a74170c9f47e8c

    SHA512

    d7883a046d9b153094f9f3e5970b78a9084de8472d219a325006a7652cdf5427641a0c10beef4aceaa4ad9d92ea1a2ccf8104588e51760200e7e85be37524c4e

  • \Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build3.exe
    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • \Users\Admin\AppData\Local\dc9a82f7-595e-4dc8-b2a4-d344fe7ddd40\build3.exe
    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • memory/628-62-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/628-66-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/628-61-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/628-60-0x00000000757A1000-0x00000000757A3000-memory.dmp
    Filesize

    8KB

  • memory/628-56-0x0000000000424141-mapping.dmp
  • memory/628-55-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/700-107-0x0000000000000000-mapping.dmp
  • memory/744-104-0x0000000000000000-mapping.dmp
  • memory/1004-87-0x0000000000000000-mapping.dmp
  • memory/1008-71-0x0000000000300000-0x0000000000391000-memory.dmp
    Filesize

    580KB

  • memory/1008-67-0x0000000000300000-0x0000000000391000-memory.dmp
    Filesize

    580KB

  • memory/1008-65-0x0000000000000000-mapping.dmp
  • memory/1504-92-0x00000000004F8000-0x0000000000526000-memory.dmp
    Filesize

    184KB

  • memory/1504-83-0x0000000000000000-mapping.dmp
  • memory/1504-98-0x00000000004F8000-0x0000000000526000-memory.dmp
    Filesize

    184KB

  • memory/1504-100-0x00000000002A0000-0x00000000002EC000-memory.dmp
    Filesize

    304KB

  • memory/1524-63-0x0000000000000000-mapping.dmp
  • memory/1576-91-0x0000000000000000-mapping.dmp
  • memory/1720-54-0x0000000000260000-0x00000000002F1000-memory.dmp
    Filesize

    580KB

  • memory/1720-58-0x0000000000260000-0x00000000002F1000-memory.dmp
    Filesize

    580KB

  • memory/1720-59-0x00000000004D0000-0x00000000005EB000-memory.dmp
    Filesize

    1.1MB

  • memory/2036-69-0x0000000000424141-mapping.dmp
  • memory/2036-80-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2036-73-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2036-102-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2044-94-0x0000000000400000-0x000000000045F000-memory.dmp
    Filesize

    380KB

  • memory/2044-101-0x0000000000400000-0x000000000045F000-memory.dmp
    Filesize

    380KB

  • memory/2044-99-0x0000000000400000-0x000000000045F000-memory.dmp
    Filesize

    380KB

  • memory/2044-95-0x00000000004219EC-mapping.dmp