Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    27-11-2021 09:21

General

  • Target

    d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302.exe

  • Size

    832KB

  • MD5

    11820b08e2a8515f5992c569ce16c5b1

  • SHA1

    f3375a5bde12dd50fc0ac1ecc14a6d1df1099d3b

  • SHA256

    d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302

  • SHA512

    843515cf2141651588920f5b2899cbc3aa26d5a53c82955d135d1e0f194e74eb7d41611fb612b8252f6fef9e8a66da1773a7c86a5a1769100588cff500c89a45

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .robm

  • offline_id

    Z5GGASEfY71jtxU3i3E8kzvrTJmY9oiZkjcSm0t1

  • 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-Tjb0YqckGX 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: 0354gSd743d

rsa_pubkey.plain

Extracted

Family

vidar

Version

48.7

Botnet

517

C2

https://mstdn.social/@anapa

https://mastodon.social/@mniami

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 6 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

  • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

  • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

  • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

  • Vidar Stealer 4 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302.exe
    "C:\Users\Admin\AppData\Local\Temp\d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3968
    • C:\Users\Admin\AppData\Local\Temp\d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302.exe
      "C:\Users\Admin\AppData\Local\Temp\d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3464
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\d06d75c8-587a-4694-8818-a6e5a0bd41bc" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:648
      • C:\Users\Admin\AppData\Local\Temp\d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302.exe
        "C:\Users\Admin\AppData\Local\Temp\d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1224
        • C:\Users\Admin\AppData\Local\Temp\d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302.exe
          "C:\Users\Admin\AppData\Local\Temp\d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:908
          • C:\Users\Admin\AppData\Local\21e2d652-8906-4359-b649-9b61f5397fec\build2.exe
            "C:\Users\Admin\AppData\Local\21e2d652-8906-4359-b649-9b61f5397fec\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:716
            • C:\Users\Admin\AppData\Local\21e2d652-8906-4359-b649-9b61f5397fec\build2.exe
              "C:\Users\Admin\AppData\Local\21e2d652-8906-4359-b649-9b61f5397fec\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:1696

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    MD5

    9dc67b11ad67886d83ec9cbf7922f317

    SHA1

    421eb58463bb0c726479bcc32f548de29991ebeb

    SHA256

    d2f4acc07d8bf2b562029cc85eec1b52bd37be9f276a927f565610e109308ead

    SHA512

    ea5995232251a3e161769484f6a49624f656ea94cc2545477daec56c3536736cee0f8554af535ca7a82e5fc687e5ee56c5955b32726b8c2c21d28c538d25b367

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

    MD5

    b3439cbad3deec29218c20b7294ccd3c

    SHA1

    01f1ecbc00e38042701d9969fd44466465ed3147

    SHA256

    80975f1efe7637a0b5cfd772b5eb35f7ad19e698ce674aacad7eb779c0f62249

    SHA512

    33fe0b38252890ef561a95f5ca661b8f3cc71df632c8939914869980672847dcd19527a0d9e1d79f274dc328b5aad5b5bf6229c4ab9ede0cb69d87d57af9d9c4

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

    MD5

    4a481950dcabb02f78467c6ea4116c60

    SHA1

    095710bdec723acaf0bb0ace090a53e89c0143ea

    SHA256

    e49a31dfc2b13fa6253f65032aa465df6e69d023f376633f9f4f6ea975eeb0de

    SHA512

    40964fcf378006f89cb399bd9c4f0b645cd68d52cb6074b236c832125961ee24fd9bdc2ce1a521021a01c9d744e731b1448f4695f5cc0b910b772fde26c65f5b

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

    MD5

    f8f2d10afdfc6750edef8f760ea69d88

    SHA1

    3e865c97a6b74378a3d5bf9024956b6fc781d0a4

    SHA256

    8191683e7f97888d3af01e057fbfa93b64f8fa10e7586d5e1e59f34f2d4bba4c

    SHA512

    ed115d6d832a0ebbd93ad519e1f445f65806d123999900cffdb0ae566b76a6f452825cc982f84a5bada05c78f0c08bb86a9844fcfb1028e60acc5b35fefec6c0

  • C:\Users\Admin\AppData\Local\21e2d652-8906-4359-b649-9b61f5397fec\build2.exe

    MD5

    bc8eaaafd8feb26a72f74dcdb99c7865

    SHA1

    818aa87338d4df601db15f976b70b016e2e23d06

    SHA256

    9d4f3c4a7bce15559a9501b2c7d2ecf8f005a1b325dd407dff8054ed0e3e9b17

    SHA512

    c49c05d3663529b949863cb714d3cbfe7869551e4a6b57dc5281c7ba569fe1c90481a135fb689edf8bd7121b48fd78eb9efe2a0d8960023d161ec0f47f5bfcad

  • C:\Users\Admin\AppData\Local\21e2d652-8906-4359-b649-9b61f5397fec\build2.exe

    MD5

    bc8eaaafd8feb26a72f74dcdb99c7865

    SHA1

    818aa87338d4df601db15f976b70b016e2e23d06

    SHA256

    9d4f3c4a7bce15559a9501b2c7d2ecf8f005a1b325dd407dff8054ed0e3e9b17

    SHA512

    c49c05d3663529b949863cb714d3cbfe7869551e4a6b57dc5281c7ba569fe1c90481a135fb689edf8bd7121b48fd78eb9efe2a0d8960023d161ec0f47f5bfcad

  • C:\Users\Admin\AppData\Local\21e2d652-8906-4359-b649-9b61f5397fec\build2.exe

    MD5

    bc8eaaafd8feb26a72f74dcdb99c7865

    SHA1

    818aa87338d4df601db15f976b70b016e2e23d06

    SHA256

    9d4f3c4a7bce15559a9501b2c7d2ecf8f005a1b325dd407dff8054ed0e3e9b17

    SHA512

    c49c05d3663529b949863cb714d3cbfe7869551e4a6b57dc5281c7ba569fe1c90481a135fb689edf8bd7121b48fd78eb9efe2a0d8960023d161ec0f47f5bfcad

  • C:\Users\Admin\AppData\Local\d06d75c8-587a-4694-8818-a6e5a0bd41bc\d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302.exe

    MD5

    11820b08e2a8515f5992c569ce16c5b1

    SHA1

    f3375a5bde12dd50fc0ac1ecc14a6d1df1099d3b

    SHA256

    d80f99f7fd52bd712dfe525eff88a97ffe60e82c12e96b966b0ae8b644d45302

    SHA512

    843515cf2141651588920f5b2899cbc3aa26d5a53c82955d135d1e0f194e74eb7d41611fb612b8252f6fef9e8a66da1773a7c86a5a1769100588cff500c89a45

  • \ProgramData\mozglue.dll

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/648-120-0x0000000000000000-mapping.dmp

  • memory/716-134-0x0000000002DC9000-0x0000000002E45000-memory.dmp

    Filesize

    496KB

  • memory/716-131-0x0000000000000000-mapping.dmp

  • memory/716-138-0x0000000004850000-0x0000000004925000-memory.dmp

    Filesize

    852KB

  • memory/908-125-0x0000000000424141-mapping.dmp

  • memory/908-130-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1224-122-0x0000000000000000-mapping.dmp

  • memory/1224-123-0x0000000004EB2000-0x0000000004F43000-memory.dmp

    Filesize

    580KB

  • memory/1696-135-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/1696-136-0x00000000004A140D-mapping.dmp

  • memory/1696-139-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/3464-119-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3464-118-0x0000000000424141-mapping.dmp

  • memory/3464-117-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3968-116-0x0000000005010000-0x000000000512B000-memory.dmp

    Filesize

    1.1MB