Analysis Overview
SHA256
6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2
Threat Level: Known bad
The file 6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2 was found to be: Known bad.
Malicious Activity Summary
Vidar
Djvu Ransomware
Detected Djvu ransomware
Downloads MZ/PE file
Reads user/profile data of web browsers
Loads dropped DLL
Modifies file permissions
Executes dropped EXE
Looks up external IP address via web service
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Accesses 2FA software files, possible credential harvesting
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Checks processor information in registry
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-31 03:51
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-31 03:51
Reported
2023-03-31 03:54
Platform
win10-20230220-en
Max time kernel
144s
Max time network
126s
Command Line
Signatures
Detected Djvu ransomware
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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\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\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-1-5-21-1311743041-1167936498-546579926-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\964238d6-ed9c-4376-a61c-e4eaebcbe992\\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.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 2496 set thread context of 2544 | N/A | C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe | C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe |
| PID 1504 set thread context of 4700 | N/A | C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe | C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe |
| PID 1236 set thread context of 3568 | N/A | C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe | C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\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\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\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 |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\timeout.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe
"C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe"
C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe
"C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\964238d6-ed9c-4376-a61c-e4eaebcbe992" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe
"C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe
"C:\Users\Admin\AppData\Local\Temp\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe
"C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe"
C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe
"C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe"
C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build3.exe
"C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\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\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe" & exit
C:\Windows\SysWOW64\timeout.exe
timeout /t 6
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 |
| US | 8.8.8.8:53 | 254.217.0.162.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 8.3.197.209.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.32.18.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 188.155.64.172.in-addr.arpa | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | uaery.top | udp |
| KR | 211.119.84.112:80 | uaery.top | tcp |
| US | 8.8.8.8:53 | zexeq.com | udp |
| KR | 222.236.49.124:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 112.84.119.211.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 124.49.236.222.in-addr.arpa | udp |
| KR | 222.236.49.124:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| US | 8.8.8.8:53 | 99.167.154.149.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.249.124.192.in-addr.arpa | udp |
| DE | 116.202.185.202:80 | 116.202.185.202 | tcp |
| US | 8.8.8.8:53 | 202.185.202.116.in-addr.arpa | udp |
| US | 52.182.143.208:443 | tcp | |
| NL | 84.53.175.11:80 | tcp | |
| US | 8.8.8.8:53 | 73.254.224.20.in-addr.arpa | udp |
| US | 93.184.220.29:80 | tcp |
Files
memory/2544-122-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2544-123-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2496-124-0x00000000049E0000-0x0000000004AFB000-memory.dmp
memory/2544-125-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2544-126-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\964238d6-ed9c-4376-a61c-e4eaebcbe992\6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2.exe
| MD5 | 9d206e7325681732f7942d50b94911b7 |
| SHA1 | 0953271f3eaed68251f8d0a1de4dc0a0553ed435 |
| SHA256 | 6640e4322c4da4e471025c897cbdb3e17e4e81ee006a41e3d9b159c4b760f8d2 |
| SHA512 | a2ccb20604bace464fcb76a45daf84c4d066d03a9752d71e4b19c54fac062b980ebd4ca95d3d70cdd67fe4cf95c205c13e6c0f9d2354c05c19efe92461cc2624 |
memory/2544-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4700-141-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4700-142-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | ee7ad9d8f28e0558a94e667206e8a271 |
| SHA1 | b49a079526da92d55f2d1bc66659836c0f90a086 |
| SHA256 | 9eeeef2cbd8192c6586ffa64114ad0c3e8e5ab3a73817e1044895517c6eba712 |
| SHA512 | 0c1596e7b8e54e0cce8139a339c4c34f5f9391ce0b7051673abe7a43f174f292e0d3267b1ce1186247535941b416962b6fe63cb03855ddea254cf09fddad3223 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 0f96c402f8555598740326b67eda1615 |
| SHA1 | 851e2983f2c7b18be7e081f37d50bcceab8e23bd |
| SHA256 | cdb0dce1e75375564aed2273441659e42667906edd92c426043394246c7971f8 |
| SHA512 | 19fbcf6237d92dd9b99101a0805e4e80db98ee6e80e8e812d137278bffdf67a389f2284a8ad7174fa8972a35a0eda46b08c1472c4137ac69938cc79bd8e2345e |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 6a3b8331e801f083b403b0857ed8d574 |
| SHA1 | 48d275731f1dbd0630d1ca55a1b05f149a011d1f |
| SHA256 | 98651a2da4a4613bc2a03c4128926fe6b05f1af8a7a21e1fedec75db013706a0 |
| SHA512 | 7527b8857707c8822e4b7f5049ddc9b4c49933e68535690746d84b7f0187a10f36e874719bdb1bf3ba8b035568a7cbafd687b80c4621dc35552d73f7e497071d |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | dc4f64258c227b26a5dfc2b07ae25497 |
| SHA1 | 40f1345aefd3f51276842d5dcac9f5f248ffe010 |
| SHA256 | 4f04b6bd941c609e9a55948bebb3959d43ce16ea6238117681c07bb3cae3b507 |
| SHA512 | 4653dc702f030d984d29cc14e39d5dbe30f62417ffd929706572a22eabef90ab4f9cb06ea81890227bf4338ff984e9ac9d7c1d1f5cc7a76106c38e7b76cb04ba |
memory/4700-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4700-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4700-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4700-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4700-155-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4700-156-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
memory/4700-164-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3568-166-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
memory/3568-168-0x0000000000400000-0x000000000046C000-memory.dmp
memory/1236-169-0x00000000047B0000-0x0000000004807000-memory.dmp
memory/3568-170-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3568-171-0x0000000000400000-0x000000000046C000-memory.dmp
C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4700-178-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\4a0a61d8-d866-46e8-a961-35ce6876186c\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/3568-191-0x0000000061E00000-0x0000000061EF3000-memory.dmp
\ProgramData\nss3.dll
| MD5 | 1cc453cdf74f31e4d913ff9c10acdde2 |
| SHA1 | 6e85eae544d6e965f15fa5c39700fa7202f3aafe |
| SHA256 | ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5 |
| SHA512 | dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571 |
\ProgramData\mozglue.dll
| MD5 | c8fd9be83bc728cc04beffafc2907fe9 |
| SHA1 | 95ab9f701e0024cedfbd312bcfe4e726744c4f2e |
| SHA256 | ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a |
| SHA512 | fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040 |
memory/3568-242-0x0000000000400000-0x000000000046C000-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/3568-248-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3568-249-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3568-250-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3568-251-0x0000000000400000-0x000000000046C000-memory.dmp