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Analysis

  • max time kernel
    68s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/09/2022, 18:38

General

  • Target

    file.exe

  • Size

    787KB

  • MD5

    f976de456e761a39e3e9a12ccbd88bce

  • SHA1

    8c40302b89309035e90cd098bb1d2215c97f1a43

  • SHA256

    249cb4680de5cf06721fa03944054178a62fa79bdfb484ab1bcaea4b0d66a33e

  • SHA512

    11a1bf2b0110676d1e432547c757b8767cb522207dd27fbbbde237d2361e10476385b30f4dbbcff668528950b782dd2f105550300559e61aa275cede4ecdf397

  • SSDEEP

    12288:gRfNHwRGWrynMdC4YrytHTaEg4p4AMWmcEukaYY9dHmWZrLM0Ai75:gzwlVLYrwzaEg4p4LWsuka59ZnA45

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test3/get.php

Attributes
  • extension

    .aamv

  • offline_id

    MyudhIExJux2oRQXw95TT1oAPu7mvqRMzxr1eet1

  • payload_url

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

    http://acacaca.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-4Xcf4IX21n 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: 0564Jhyjd

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 10 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3524
    • C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5052
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b72a5409-a003-4d79-90f9-2867e31da68a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4772
      • C:\Users\Admin\AppData\Local\Temp\file.exe
        "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4816
        • C:\Users\Admin\AppData\Local\Temp\file.exe
          "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4000
          • C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe
            "C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:224
            • C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe
              "C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe"
              6⤵
              • Executes dropped EXE
              • Checks computer location settings
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:4528
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" \/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe" & del C:\PrograData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:4020
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2740
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:4108
          • C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build3.exe
            "C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:2180
            • 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:544
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:2172
    • 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"
      2⤵
      • Creates scheduled task(s)
      PID:4360

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\ProgramData\mozglue.dll

    Filesize

    593KB

    MD5

    c8fd9be83bc728cc04beffafc2907fe9

    SHA1

    95ab9f701e0024cedfbd312bcfe4e726744c4f2e

    SHA256

    ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

    SHA512

    fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

  • C:\ProgramData\nss3.dll

    Filesize

    2.0MB

    MD5

    1cc453cdf74f31e4d913ff9c10acdde2

    SHA1

    6e85eae544d6e965f15fa5c39700fa7202f3aafe

    SHA256

    ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

    SHA512

    dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

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

    Filesize

    2KB

    MD5

    1c626eac6241b02b0082a76f150a3a8a

    SHA1

    b7c0c6ae1d3d5a2beaf4c4f3744cac6285f04858

    SHA256

    412116af67c3a894bee8821158ee91447ca6cfe0d5b43d0524e6c5af5defaf69

    SHA512

    8550f0ec9a9c5f152a3b5eb49a91084d3201589373b8d381233926f1ac34bd0c276fa1e3c9da75bd8297f417d9f566f4bf6b882107c7255522f745e6d446802a

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

    Filesize

    1KB

    MD5

    e9e482bf825221326b7c080ef52e5036

    SHA1

    67244c170dad567630298f89364a5e9626e2517a

    SHA256

    60843d5086f10e833ca98696967f1a39ea04a2ffee6d87679b5803092b9cfa71

    SHA512

    c7a5fd63c0faa2a5cd8be90c7dcf10d8dd564964dc4b8ab4fa1a7a188fa89094563f595c94f4ea133582cfbcf9cc90cb74bd273924b7fa5eadae868bced51440

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

    Filesize

    488B

    MD5

    f6ab95c9a5f2788ef1ed8b51cf3a5b37

    SHA1

    a9904cd77d077d5af890976f74df54a7a3df58dd

    SHA256

    5f9a82c01803e743983f2a0cd9cad16ab1f21c6e568995efc29162654a0d020b

    SHA512

    5a3dbfe5b89f6ec4771ba5250bdee23b6a19f01cfaa760f5cd63e55a0245358ae7148fa95b6a660c019b334c0c9bfc2a081c1851fce701f6286509547a3c0714

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

    Filesize

    482B

    MD5

    7ce778fe6b599c6876513a723d7cc5f2

    SHA1

    cce148ffcd69972f2601673341810bd6eb75371d

    SHA256

    7650572c604ea5949f5934cc5f1a758f9a6390b5364d111cef1859dbcd0342e1

    SHA512

    2905dc8eabe6d87ffe4d54abacc25b7ea3974d20f9068fed8baa2a83728786c5ad5b9b281fef9cfff52676d0af9b97c30fb304d608d487d0d2ffc68de95a5fb7

  • C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe

    Filesize

    400KB

    MD5

    fe7e1a7ed3cece1c44e1eac81cb36948

    SHA1

    f9f191e7e67ae39eb71099c4cedbf1be234e951e

    SHA256

    32403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18

    SHA512

    ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35

  • C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe

    Filesize

    400KB

    MD5

    fe7e1a7ed3cece1c44e1eac81cb36948

    SHA1

    f9f191e7e67ae39eb71099c4cedbf1be234e951e

    SHA256

    32403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18

    SHA512

    ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35

  • C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe

    Filesize

    400KB

    MD5

    fe7e1a7ed3cece1c44e1eac81cb36948

    SHA1

    f9f191e7e67ae39eb71099c4cedbf1be234e951e

    SHA256

    32403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18

    SHA512

    ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35

  • C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\b72a5409-a003-4d79-90f9-2867e31da68a\file.exe

    Filesize

    787KB

    MD5

    f976de456e761a39e3e9a12ccbd88bce

    SHA1

    8c40302b89309035e90cd098bb1d2215c97f1a43

    SHA256

    249cb4680de5cf06721fa03944054178a62fa79bdfb484ab1bcaea4b0d66a33e

    SHA512

    11a1bf2b0110676d1e432547c757b8767cb522207dd27fbbbde237d2361e10476385b30f4dbbcff668528950b782dd2f105550300559e61aa275cede4ecdf397

  • 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

  • memory/224-163-0x000000000067D000-0x00000000006A9000-memory.dmp

    Filesize

    176KB

  • memory/224-166-0x00000000005C0000-0x000000000060A000-memory.dmp

    Filesize

    296KB

  • memory/3524-134-0x0000000002251000-0x00000000022E3000-memory.dmp

    Filesize

    584KB

  • memory/3524-136-0x00000000022F0000-0x000000000240B000-memory.dmp

    Filesize

    1.1MB

  • memory/4000-150-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4000-145-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4000-147-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4000-188-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4528-165-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/4528-190-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/4528-164-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/4528-167-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/4528-168-0x0000000061E00000-0x0000000061EF3000-memory.dmp

    Filesize

    972KB

  • memory/4528-161-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/4816-146-0x00000000021A8000-0x000000000223A000-memory.dmp

    Filesize

    584KB

  • memory/5052-138-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5052-142-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5052-137-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5052-135-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5052-133-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB