Analysis Overview
SHA256
db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4
Threat Level: Known bad
The file db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4 was found to be: Known bad.
Malicious Activity Summary
Vidar
Djvu Ransomware
Detected Djvu ransomware
Downloads MZ/PE file
Executes dropped EXE
Checks computer location settings
Loads dropped DLL
Reads user/profile data of web browsers
Modifies file permissions
Checks installed software on the system
Accesses 2FA software files, possible credential harvesting
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
Looks up external IP address via web service
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-10-11 14:57
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-10-11 14:57
Reported
2022-10-11 15:00
Platform
win10v2004-20220812-en
Max time kernel
95s
Max time network
150s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Djvu Ransomware
Vidar
Downloads MZ/PE file
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\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-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\09f35fdf-ef84-4a7a-adc8-e90c96e85cf4\\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.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 4916 set thread context of 3620 | N/A | C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe | C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe |
| PID 4376 set thread context of 5028 | N/A | C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe | C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe |
| PID 3356 set thread context of 552 | N/A | C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe | C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe |
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\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\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe
"C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe"
C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe
"C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\09f35fdf-ef84-4a7a-adc8-e90c96e85cf4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe
"C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe
"C:\Users\Admin\AppData\Local\Temp\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe
"C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe"
C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe
"C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe"
C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build3.exe
"C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\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"
Network
| Country | Destination | Domain | Proto |
| BE | 8.238.111.254:80 | tcp | |
| 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 |
| KR | 210.92.250.133:80 | rgyui.top | tcp |
| PE | 190.117.75.91:80 | winnlinne.com | tcp |
| US | 20.44.10.122:443 | 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 | 8.238.21.126:80 | tcp | |
| US | 8.238.21.126:80 | tcp | |
| US | 8.238.21.126:80 | tcp |
Files
memory/3620-132-0x0000000000000000-mapping.dmp
memory/3620-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4916-135-0x000000000235C000-0x00000000023EE000-memory.dmp
memory/4916-136-0x0000000002450000-0x000000000256B000-memory.dmp
memory/3620-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3620-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3620-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1708-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\09f35fdf-ef84-4a7a-adc8-e90c96e85cf4\db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4.exe
| MD5 | 2b4abbbbf4d7cdfe36d1d4d4ce541540 |
| SHA1 | 6bb6f1651647fe02565312685ab25b1c14c8efb1 |
| SHA256 | db48e840c650efc8d100ba0dfdc3dd032b80279f00eb7933214b2282e52c6da4 |
| SHA512 | 766b0988ce7d58cd91ade4f2d5468c5ce6fa7291f610fbf977944ff8eeaf1692e64b7bcd31fa625d8d7a6acc94b82e5a7859b76ee4df20535ed0720fca15b965 |
memory/4376-141-0x0000000000000000-mapping.dmp
memory/3620-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5028-143-0x0000000000000000-mapping.dmp
memory/4376-146-0x0000000002293000-0x0000000002325000-memory.dmp
memory/5028-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3620-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/5028-147-0x0000000000400000-0x0000000000537000-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 | 58f4611bc00df8f492d3bdc04a046858 |
| SHA1 | b382ca2a31bb7e4eef383eda12aeb923aec0beec |
| SHA256 | 11bd3b443f697c4c199ee391435e157999d0768cc2edba8d7d194c71ec12884a |
| SHA512 | f9cdc161821d65da9748ebaf5bda538c1a6147fcfc94840eca1a7b0f8595df8021fce4291207a1a3d0f4e47dd64ecfb22d39789676cfbcd17eaaacfbc1b65758 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | ec133fa08d8cd5d6fbfbc9040f662538 |
| SHA1 | cdeef6938c5ab50d17789ef80a19a69e24c3d92d |
| SHA256 | 1457ebdab295173feb463cb238e59e3b35815d20731b8f63c1b85afd8e89edab |
| SHA512 | bd7cfe2e22fec679181620edc8b871b5a5dc4359ccb2e4a1c3e7199286c11a61fe56791197594b7e4be202b22e8dd3cc84ba1995386b029da1082132fab0d23c |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 6f59ed058aa06aaf5ec6213b955aabd4 |
| SHA1 | baf7b828a563b8fb6111e4ce35e0055575ad80b4 |
| SHA256 | 2d82e2629fa2e08f28b43b15da43dff56c7f4b23b39d66109c7c61998e35b4d5 |
| SHA512 | 6b0f041dafb98b9eaf70ac0d20a98c56e1c42231c4a4ae6e11582b20d20bf8f96dfd7747739a10d77368994441adb0e181b356f8569697b1f22ab4fe931170ce |
memory/5028-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3356-154-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/552-157-0x0000000000000000-mapping.dmp
memory/552-158-0x0000000000400000-0x0000000000463000-memory.dmp
C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build2.exe
| MD5 | 5fd8c38657bb9393bb4736c880675223 |
| SHA1 | f3a03b2e75cef22262f6677e3832b6ad9327905c |
| SHA256 | 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6 |
| SHA512 | 43c82f6db716792a770a3573a9d20cb69a2421ccc2bb875e57f4270d92c9289ee684deda19e3232c50f4675aaf86de173f73376a00f927a8d9847f60b8b732fe |
memory/3356-160-0x000000000083D000-0x0000000000869000-memory.dmp
memory/3356-162-0x00000000006F0000-0x000000000073F000-memory.dmp
memory/552-163-0x0000000000400000-0x0000000000463000-memory.dmp
memory/552-164-0x0000000000400000-0x0000000000463000-memory.dmp
memory/4352-165-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\891d5932-2a9d-48a3-8883-385a67c994ed\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/3096-168-0x0000000000000000-mapping.dmp
memory/552-169-0x0000000061E00000-0x0000000061EF3000-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/5028-189-0x0000000000400000-0x0000000000537000-memory.dmp
memory/552-190-0x0000000000400000-0x0000000000463000-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/4780-193-0x0000000000000000-mapping.dmp