Analysis Overview
SHA256
671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586
Threat Level: Known bad
The file 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586 was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Vidar
Djvu Ransomware
Downloads MZ/PE file
Executes dropped EXE
Modifies file permissions
Reads user/profile data of web browsers
Loads dropped DLL
Checks installed software on the system
Adds Run key to start application
Looks up external IP address via web service
Accesses 2FA software files, possible credential harvesting
Accesses cryptocurrency files/wallets, possible credential harvesting
Suspicious use of SetThreadContext
Enumerates physical storage devices
Program crash
Suspicious use of WriteProcessMemory
Checks processor information in registry
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-10-11 10:00
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-10-11 10:00
Reported
2022-10-11 10:03
Platform
win10-20220812-en
Max time kernel
118s
Max time network
148s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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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\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\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-1-5-21-3844063266-715245855-4050956231-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e03f1a30-25fd-41f2-a82e-ae4fad38836e\\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.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 4324 set thread context of 4000 | N/A | C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe | C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe |
| PID 4568 set thread context of 3060 | N/A | C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe | C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe |
| PID 4108 set thread context of 1588 | N/A | C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe | C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\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\32c45d7e-8fd4-48d6-a822-6e1223b6093b\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\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
"C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe"
C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
"C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\e03f1a30-25fd-41f2-a82e-ae4fad38836e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
"C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
"C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe
"C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe"
C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe
"C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 1676
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 |
| KW | 37.34.248.24:80 | rgyui.top | tcp |
| KR | 115.88.24.203:80 | winnlinne.com | tcp |
| KR | 115.88.24.203:80 | winnlinne.com | tcp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 23.88.115.141:80 | 23.88.115.141 | tcp |
| KR | 115.88.24.203:80 | winnlinne.com | tcp |
| KR | 115.88.24.203:80 | winnlinne.com | tcp |
| US | 20.189.173.15:443 | tcp | |
| KR | 115.88.24.203:80 | winnlinne.com | tcp |
Files
memory/4324-118-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-119-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-120-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-121-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-122-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-123-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-124-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-125-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-126-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-127-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-128-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-129-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-130-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-131-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-132-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-133-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-134-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-135-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-136-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-137-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-138-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-139-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-141-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-142-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-143-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-144-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-145-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-146-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4324-147-0x0000000002360000-0x00000000023FE000-memory.dmp
memory/4000-149-0x0000000000424141-mapping.dmp
memory/4324-150-0x00000000024A0000-0x00000000025BB000-memory.dmp
memory/4000-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4000-151-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-152-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-153-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-154-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-155-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-157-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-156-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4000-158-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-159-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-160-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-161-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-162-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-163-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-164-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-165-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-166-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-167-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-168-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-169-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-170-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-171-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-172-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-173-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-174-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-175-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-176-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-177-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-178-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-179-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-180-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-181-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-182-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-183-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-184-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-185-0x00000000776D0000-0x000000007785E000-memory.dmp
memory/4000-205-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1196-221-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\e03f1a30-25fd-41f2-a82e-ae4fad38836e\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
| MD5 | 335d895837cd0451a60057a9b84c81bc |
| SHA1 | a3846bce811b7150c30719f7599e700d0a154816 |
| SHA256 | 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586 |
| SHA512 | c79e7efc35ce76e9c804b78fb5ba8e4137d521d43d43d02e18ec3d9cbb9c73a135cd9f40f88788fe82d5bd997de73a4d8db5ded6953c92d1b002cc477b8cba14 |
memory/4568-247-0x0000000000000000-mapping.dmp
memory/4000-250-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3060-277-0x0000000000424141-mapping.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 9d0a03ed6d65775047fa11ea4d05d8c5 |
| SHA1 | 1235586fff9749afd94c227a8a4fd9fce5595482 |
| SHA256 | 7e745bc5802049c8c589ecf726ef79f147b8a802e3f04563c047f4b7f27dce3b |
| SHA512 | fed832aefad68018493aa66dba1c89d4217199a15724479bb98636971d6f240585ee64f2e3d1d11892a1bf792f775aaed02050a4842e509aceb9f6c4dbad4b51 |
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\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 6f59ed058aa06aaf5ec6213b955aabd4 |
| SHA1 | baf7b828a563b8fb6111e4ce35e0055575ad80b4 |
| SHA256 | 2d82e2629fa2e08f28b43b15da43dff56c7f4b23b39d66109c7c61998e35b4d5 |
| SHA512 | 6b0f041dafb98b9eaf70ac0d20a98c56e1c42231c4a4ae6e11582b20d20bf8f96dfd7747739a10d77368994441adb0e181b356f8569697b1f22ab4fe931170ce |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | f528535a07da2196f0da7122161aa0b2 |
| SHA1 | d309aad6e6f9ec290db7afacd47c4c87b7059886 |
| SHA256 | f973b8d47fccedc6a527ed42be3534aa10488eea873d3257a0ebea4b34bdb668 |
| SHA512 | dda17f3fe421556a923e216f3ebc0a138394cf05031712094bb56fa623afa330d946a7b5569670cce48eb34f973f0397e09d51ba63d94faf4e2624179caa1149 |
memory/3060-350-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4108-357-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe
| MD5 | 9c3d4324a153c6438f48083bc333a962 |
| SHA1 | 033e80e2008f4f62d2716ce0473bb0d763d52277 |
| SHA256 | 5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98 |
| SHA512 | 8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd |
C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe
| MD5 | 9c3d4324a153c6438f48083bc333a962 |
| SHA1 | 033e80e2008f4f62d2716ce0473bb0d763d52277 |
| SHA256 | 5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98 |
| SHA512 | 8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd |
memory/1588-390-0x000000000042161D-mapping.dmp
C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe
| MD5 | 9c3d4324a153c6438f48083bc333a962 |
| SHA1 | 033e80e2008f4f62d2716ce0473bb0d763d52277 |
| SHA256 | 5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98 |
| SHA512 | 8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd |
memory/4108-394-0x0000000002190000-0x00000000021DA000-memory.dmp
memory/1588-441-0x0000000000400000-0x000000000045E000-memory.dmp
memory/3060-461-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1588-480-0x0000000000400000-0x000000000045E000-memory.dmp
\ProgramData\nss3.dll
| MD5 | 1cc453cdf74f31e4d913ff9c10acdde2 |
| SHA1 | 6e85eae544d6e965f15fa5c39700fa7202f3aafe |
| SHA256 | ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5 |
| SHA512 | dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571 |
\ProgramData\mozglue.dll
| MD5 | c8fd9be83bc728cc04beffafc2907fe9 |
| SHA1 | 95ab9f701e0024cedfbd312bcfe4e726744c4f2e |
| SHA256 | ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a |
| SHA512 | fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040 |