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Analysis

  • max time kernel
    146s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    16/09/2022, 23:55

General

  • Target

    file.exe

  • Size

    820KB

  • MD5

    617ad37350065407d3f385ce460dfc65

  • SHA1

    0b3083761f3417857f5a0f14d131bf691a32c087

  • SHA256

    ec12bb53d94b1a84e4715f0b671b87eeaff4360217c6336897622c225499b3b9

  • SHA512

    460af814aeaef538d0e6b2d67cfff3f53b245da0657d3f73c2797bcd3d2b2f141e7baa5f2d2b2f8d2f560465cd9eed93116158da3aa3b1cdf7dcc36b3c08fd38

  • SSDEEP

    24576:bifl0zISMgxANgTHMyISKUfOLcHGKQWdvKTji:bs0zx6N5UmgKWV

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
  • Loads dropped DLL 6 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
  • Modifies system certificate store 2 TTPs 11 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 64 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:1968
    • C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1972
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\42dba92c-22fe-4550-9c0f-59ca288bc225" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1768
      • 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:1360
        • C:\Users\Admin\AppData\Local\Temp\file.exe
          "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1132
          • C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build2.exe
            "C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:468
            • C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build2.exe
              "C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Modifies system certificate store
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:1756
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe"  íh/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build2.exe" & del C:\PrograData\*.dll & exit
                7⤵
                  PID:1956
                  • C:\Windows\SysWOW64\taskkill.exe
                    taskkill /im build2.exe /f
                    8⤵
                    • Kills process with taskkill
                    • Suspicious use of AdjustPrivilegeToken
                    PID:316
                  • C:\Windows\SysWOW64\timeout.exe
                    timeout /t 6
                    8⤵
                    • Delays execution with timeout.exe
                    PID:1724
            • C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build3.exe
              "C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build3.exe"
              5⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:524
              • 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:1688
    • C:\Windows\system32\taskeng.exe
      taskeng.exe {E16B9F3D-0542-47C6-858C-105B417CF702} S-1-5-21-999675638-2867687379-27515722-1000:ORXGKKZC\Admin:Interactive:[1]
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1848
      • 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:936
        • 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:1188

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      Filesize

      2KB

      MD5

      ea3ead1b160922fb25b1b9d766a56fa5

      SHA1

      9f61cb0a5a80fa5ba776f71fed4728d002d3aca1

      SHA256

      4080213fba647d43c0ac02710ac7b631c23f8f791930016045cda9aeec1b6867

      SHA512

      ec817bdc668bff4c266ca8b6a6c4068251926714262a95f9ac7f7565e2d66a26371589182d0ba1d03fa482d99430b865cb7eb24becf92b72e45f20b26a215c15

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

      Filesize

      60KB

      MD5

      6c6a24456559f305308cb1fb6c5486b3

      SHA1

      3273ac27d78572f16c3316732b9756ebc22cb6ed

      SHA256

      efc3c579bd619ceab040c4b8c1b821b2d82c64fddd9e80a00ec0d7f6577ed973

      SHA512

      587d4a9175a6aa82cd8bb1c11ca6508f95cd218f76ac322ddbd1bc7146a0e25f8937ee426a6fb0fb0bb045cedb24d8c8a9edfe9f654112f293d8701220f726b4

    • 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

      192ac163564e3a6b2c2d66961aab1f01

      SHA1

      eb53831c520d0a9604e2951bf32aef8130503a43

      SHA256

      5c9775576485e0dd26062f619c190586048ac4438ba6214d7745b80ad3946c1e

      SHA512

      5ade9e526f2e31d3f73ee61d99380c15dacce065bac930b4a9b1373aba58cb226d0b9896fa358d74f8aa2fb447da682b174cefbefa0f294dee93b7a2148d2f85

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

      Filesize

      344B

      MD5

      823f56b1280d04fe576126315f1e6c58

      SHA1

      6d0f342810ae61389e91e18e79de62a76445615b

      SHA256

      633b1fd6e6f7eb2eec2451209075b3df221b20e75d3b435c3fa8a28dd8166929

      SHA512

      d78d1794462a1381b711b1f4949f018afdfe339c207ebc44bf6d6f7e33ea0cc86905b1637bc07d78a7893a242a1ba2655af22cb41e11f091f07267365fa5d862

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

      Filesize

      482B

      MD5

      531f6c669da9cec05e7e55577bd18e7f

      SHA1

      335b5234c2f183dda01342cbcecb4891c6064fc5

      SHA256

      ac7145f6d93410a414eea437df1fe9d6650a06db43c83019def3bf162b4c0186

      SHA512

      7905f656c0d1a3dcab2690aaafe082ef1b7e9833e128d28f9aaf09597c8d1292646b66c3a904c361ab24e9abff49e650ba1ce2537f56a5df9c13068f072169da

    • C:\Users\Admin\AppData\Local\42dba92c-22fe-4550-9c0f-59ca288bc225\file.exe

      Filesize

      820KB

      MD5

      617ad37350065407d3f385ce460dfc65

      SHA1

      0b3083761f3417857f5a0f14d131bf691a32c087

      SHA256

      ec12bb53d94b1a84e4715f0b671b87eeaff4360217c6336897622c225499b3b9

      SHA512

      460af814aeaef538d0e6b2d67cfff3f53b245da0657d3f73c2797bcd3d2b2f141e7baa5f2d2b2f8d2f560465cd9eed93116158da3aa3b1cdf7dcc36b3c08fd38

    • C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build2.exe

      Filesize

      376KB

      MD5

      8b01bb02b7aeb097ba96dc7628575ca0

      SHA1

      11046fb024f695b1dc7a3a0be9167cb4e85548c6

      SHA256

      7abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a

      SHA512

      64cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35

    • C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build2.exe

      Filesize

      376KB

      MD5

      8b01bb02b7aeb097ba96dc7628575ca0

      SHA1

      11046fb024f695b1dc7a3a0be9167cb4e85548c6

      SHA256

      7abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a

      SHA512

      64cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35

    • C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build2.exe

      Filesize

      376KB

      MD5

      8b01bb02b7aeb097ba96dc7628575ca0

      SHA1

      11046fb024f695b1dc7a3a0be9167cb4e85548c6

      SHA256

      7abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a

      SHA512

      64cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35

    • C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • C:\Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\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

    • \ProgramData\mozglue.dll

      Filesize

      593KB

      MD5

      c8fd9be83bc728cc04beffafc2907fe9

      SHA1

      95ab9f701e0024cedfbd312bcfe4e726744c4f2e

      SHA256

      ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

      SHA512

      fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

    • \ProgramData\nss3.dll

      Filesize

      2.0MB

      MD5

      1cc453cdf74f31e4d913ff9c10acdde2

      SHA1

      6e85eae544d6e965f15fa5c39700fa7202f3aafe

      SHA256

      ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

      SHA512

      dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

    • \Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build2.exe

      Filesize

      376KB

      MD5

      8b01bb02b7aeb097ba96dc7628575ca0

      SHA1

      11046fb024f695b1dc7a3a0be9167cb4e85548c6

      SHA256

      7abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a

      SHA512

      64cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35

    • \Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build2.exe

      Filesize

      376KB

      MD5

      8b01bb02b7aeb097ba96dc7628575ca0

      SHA1

      11046fb024f695b1dc7a3a0be9167cb4e85548c6

      SHA256

      7abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a

      SHA512

      64cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35

    • \Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • \Users\Admin\AppData\Local\6545d483-55d3-4688-ac24-99271b098204\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • memory/468-97-0x000000000096B000-0x0000000000997000-memory.dmp

      Filesize

      176KB

    • memory/468-99-0x0000000000220000-0x000000000026A000-memory.dmp

      Filesize

      296KB

    • memory/1132-80-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1132-102-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1132-73-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1360-66-0x00000000002D0000-0x0000000000361000-memory.dmp

      Filesize

      580KB

    • memory/1360-71-0x00000000002D0000-0x0000000000361000-memory.dmp

      Filesize

      580KB

    • memory/1756-103-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1756-109-0x0000000061E00000-0x0000000061EF3000-memory.dmp

      Filesize

      972KB

    • memory/1756-100-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1756-101-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1756-130-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1756-92-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1968-56-0x0000000001D80000-0x0000000001E9B000-memory.dmp

      Filesize

      1.1MB

    • memory/1968-55-0x0000000001CE0000-0x0000000001D71000-memory.dmp

      Filesize

      580KB

    • memory/1968-54-0x0000000001CE0000-0x0000000001D71000-memory.dmp

      Filesize

      580KB

    • memory/1972-60-0x0000000076141000-0x0000000076143000-memory.dmp

      Filesize

      8KB

    • memory/1972-57-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1972-61-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1972-62-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1972-67-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB