Analysis Overview
SHA256
4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5
Threat Level: Known bad
The file 4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5 was found to be: Known bad.
Malicious Activity Summary
Djvu Ransomware
Vidar
Detected Djvu ransomware
Executes dropped EXE
Downloads MZ/PE file
Modifies file permissions
Checks computer location settings
Reads user/profile data of web browsers
Loads dropped DLL
Accesses 2FA software files, possible credential harvesting
Adds Run key to start application
Looks up external IP address via web service
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Suspicious use of SetThreadContext
Program crash
Enumerates physical storage devices
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-10-11 11:20
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-10-11 11:20
Reported
2022-10-11 11:23
Platform
win10v2004-20220901-en
Max time kernel
139s
Max time network
143s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
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Djvu Ransomware
Vidar
Downloads MZ/PE file
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe | N/A |
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\icacls.exe | N/A |
Reads user/profile data of web browsers
Accesses 2FA software files, possible credential harvesting
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\829d1fb9-5e46-4f01-bd25-47e41632f603\\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe | N/A |
Checks installed software on the system
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | api.2ip.ua | N/A | N/A |
| N/A | api.2ip.ua | N/A | N/A |
| N/A | api.2ip.ua | N/A | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2184 set thread context of 4376 | N/A | C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe | C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe |
| PID 3112 set thread context of 232 | N/A | C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe | C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe |
| PID 4592 set thread context of 4536 | N/A | C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe | C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe
"C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe"
C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe
"C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\829d1fb9-5e46-4f01-bd25-47e41632f603" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe
"C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe
"C:\Users\Admin\AppData\Local\Temp\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe
"C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe"
C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe
"C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe"
C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build3.exe
"C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build3.exe"
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"
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
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"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4536 -ip 4536
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4536 -s 1568
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | rgyui.top | udp |
| US | 8.8.8.8:53 | winnlinne.com | udp |
| IQ | 185.95.186.58:80 | rgyui.top | tcp |
| PE | 190.117.75.91:80 | winnlinne.com | tcp |
| PE | 190.117.75.91:80 | winnlinne.com | tcp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 195.201.251.151:80 | 195.201.251.151 | tcp |
| US | 209.197.3.8:80 | tcp | |
| NL | 104.80.225.205:443 | tcp | |
| US | 20.189.173.4:443 | tcp | |
| US | 209.197.3.8:80 | tcp | |
| US | 209.197.3.8:80 | tcp |
Files
memory/4376-132-0x0000000000000000-mapping.dmp
memory/4376-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4376-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2184-135-0x00000000006E1000-0x0000000000773000-memory.dmp
memory/4376-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2184-136-0x00000000025B0000-0x00000000026CB000-memory.dmp
memory/4376-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3972-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\829d1fb9-5e46-4f01-bd25-47e41632f603\4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5.exe
| MD5 | c8513a8d0b42f748af154de50bb1552d |
| SHA1 | 1446838cc5b9a7e58fb500588011e0f202954ee0 |
| SHA256 | 4d4bc63e56a8637862713840dbdef7072748c3ba3b55707496fb6b0fafa503a5 |
| SHA512 | fd4ac6621e425e6b9eb38540170c275921fe078bb25cc635d272c602d85b12d0f25728905d07f858728ae28a5ff214668e40e9f0bbeb2690578ff5ef1c5e0c01 |
memory/3112-141-0x0000000000000000-mapping.dmp
memory/4376-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/232-143-0x0000000000000000-mapping.dmp
memory/232-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3112-146-0x000000000227E000-0x0000000002310000-memory.dmp
memory/232-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/232-148-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 0698dbc93ba7b6bef73ba316695f8317 |
| SHA1 | a444078ff1eb7c88f52cb4e324365926b491ed47 |
| SHA256 | 263292040d77903899257c1d21201dc64d6f8d6b5a1d945cd5b28d0124d7906c |
| SHA512 | ebacaa7009aebb88199cd70fd0bb3afe69ed300318cb633edd1c0404e42aef829617f589bcbad6cb7ab4bd0a8ae87f7df1435c786184ecc5de61c8fc6950a900 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | f3b169af3a33e8c560e80c870ac4fbc4 |
| SHA1 | ea4ceca877232e13ab1fd2e9ad0d62edf0c84766 |
| SHA256 | b937553cf8d18920e1c522154521ff70110adf590406296358420e59dfe05ff9 |
| SHA512 | 7c085fec46c57c72046e867d07f62da4098671b61329cfcc0db3d5549909415684c6f69630a7995271aee0aa2debc7aaa874a44610da8279055e209960b68eb2 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | c8d829319c56c483d9109e2cb284be3c |
| SHA1 | e0094474765379c5300c0912535a6f825641f251 |
| SHA256 | fe579468e1bc87a3bae67701df132b9773b62f305f152301a17f786208023d24 |
| SHA512 | eb2236e541679d8cb958beedf524d340143b10d915f4c621d8faae65887dca378e760d29066b1824639a139bfc491c43896660179751cd805b37d2cc075465d7 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 6f59ed058aa06aaf5ec6213b955aabd4 |
| SHA1 | baf7b828a563b8fb6111e4ce35e0055575ad80b4 |
| SHA256 | 2d82e2629fa2e08f28b43b15da43dff56c7f4b23b39d66109c7c61998e35b4d5 |
| SHA512 | 6b0f041dafb98b9eaf70ac0d20a98c56e1c42231c4a4ae6e11582b20d20bf8f96dfd7747739a10d77368994441adb0e181b356f8569697b1f22ab4fe931170ce |
C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/4592-153-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/4536-156-0x0000000000000000-mapping.dmp
memory/4536-157-0x0000000000400000-0x0000000000463000-memory.dmp
C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/4592-161-0x000000000083D000-0x0000000000869000-memory.dmp
memory/4592-162-0x00000000020C0000-0x000000000210F000-memory.dmp
memory/4536-160-0x0000000000400000-0x0000000000463000-memory.dmp
memory/3820-163-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\5026e154-3610-448c-94b1-d880a9ba268b\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4648-166-0x0000000000000000-mapping.dmp
memory/4536-167-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4536-168-0x0000000061E00000-0x0000000061EF3000-memory.dmp
C:\ProgramData\nss3.dll
| MD5 | 1cc453cdf74f31e4d913ff9c10acdde2 |
| SHA1 | 6e85eae544d6e965f15fa5c39700fa7202f3aafe |
| SHA256 | ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5 |
| SHA512 | dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571 |
C:\ProgramData\mozglue.dll
| MD5 | c8fd9be83bc728cc04beffafc2907fe9 |
| SHA1 | 95ab9f701e0024cedfbd312bcfe4e726744c4f2e |
| SHA256 | ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a |
| SHA512 | fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040 |
memory/232-188-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4536-189-0x0000000000400000-0x0000000000463000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/1080-192-0x0000000000000000-mapping.dmp
memory/4536-193-0x0000000000400000-0x0000000000463000-memory.dmp