Analysis Overview
SHA256
81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522
Threat Level: Known bad
The file 81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522 was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Djvu Ransomware
Vidar
Downloads MZ/PE file
Modifies file permissions
Reads user/profile data of web browsers
Executes dropped EXE
Loads dropped DLL
Accesses 2FA software files, possible credential harvesting
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
Checks installed software on the system
Looks up external IP address via web service
Suspicious use of SetThreadContext
Enumerates physical storage devices
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Checks processor information in registry
Delays execution with timeout.exe
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-31 15:14
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-31 15:14
Reported
2023-03-31 15:17
Platform
win10-20230220-en
Max time kernel
150s
Max time network
132s
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\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.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\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\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\\7cd0278c-2b5d-449b-85e1-c9059782f688\\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.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 404 set thread context of 1128 | N/A | C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe | C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe |
| PID 4352 set thread context of 4024 | N/A | C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe | C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe |
| PID 3116 set thread context of 3768 | N/A | C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.exe | C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\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\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\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\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe
"C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe"
C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe
"C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\7cd0278c-2b5d-449b-85e1-c9059782f688" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe
"C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe
"C:\Users\Admin\AppData\Local\Temp\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.exe
"C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.exe"
C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build3.exe
"C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\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\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.exe
"C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.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\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\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 | 126.177.238.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.32.18.104.in-addr.arpa | udp |
| NL | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | uaery.top | udp |
| US | 8.8.8.8:53 | zexeq.com | udp |
| MX | 187.156.105.116:80 | zexeq.com | tcp |
| HU | 84.224.34.240:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | 116.105.156.187.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.34.224.84.in-addr.arpa | udp |
| HU | 84.224.34.240:80 | zexeq.com | tcp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 78.47.168.170:80 | 78.47.168.170 | tcp |
| US | 8.8.8.8:53 | 99.167.154.149.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.249.124.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 170.168.47.78.in-addr.arpa | udp |
| IE | 13.69.239.74:443 | tcp | |
| US | 93.184.220.29:80 | tcp |
Files
memory/1128-122-0x0000000000400000-0x0000000000537000-memory.dmp
memory/404-124-0x0000000002420000-0x000000000253B000-memory.dmp
memory/1128-123-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1128-125-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1128-126-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\7cd0278c-2b5d-449b-85e1-c9059782f688\81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522.exe
| MD5 | 156320ba94b7635871a01745657d08a9 |
| SHA1 | 8ab9273e799215132a369097481959294fdc0c36 |
| SHA256 | 81dc124911351f4325272f176aced9cbe877c398202abcb7f043d805b603b522 |
| SHA512 | 7fb47fa009ca505dd85c0407036f79be254f0bac15dc0951533dc7b091b9c8c7c5cc8aef29b06a5fdc75f3cca79177a9db20af8baaa7192f8ab8e0632100943d |
memory/1128-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4024-141-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4024-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4024-143-0x0000000000400000-0x0000000000537000-memory.dmp
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 | 40ff8d5e2494dc2d43f85fb470fb2179 |
| SHA1 | 1b58cf18b6c1e848efa5d00df38d53c9f9286512 |
| SHA256 | c4e7ad92761dc246b06089f2f80bb81ee65ce6de301b71bb375d0bef5da516fc |
| SHA512 | 0fdefffd4e3231fc46d657c2655388a6e48813a06f417756e923e5311f52f0a9b1c1b94271421c73411ce17e36ed647f01f3c3e2e68394a821d2910faf65344f |
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 | 236a3bd212b13fa069e7303e880bb03b |
| SHA1 | 92217ba8c692786d3b000afa73c4cf01edb9b4f1 |
| SHA256 | f8e7fc3e51a8c855d9cbd54bc68dd3763d87f599c00ca2c0086e5f9545b16782 |
| SHA512 | 89218c0e9adb2837be70cfbbf1bd8906f09e03fae3d08f75d4430de4c621fd2039e36256c7442e28d6faf657b269f00711b048ab0195da15fccc2cb4db00c574 |
memory/4024-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4024-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4024-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4024-156-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4024-155-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
memory/4024-169-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/4024-173-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\139ab8a9-a89e-49eb-901e-8ef6f668c8fd\build2.exe
| MD5 | aa18968e6cfbdc382ada6a3ed2852085 |
| SHA1 | 4a41fa1a182916d5790aa2071106b3441d64468d |
| SHA256 | c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb |
| SHA512 | 8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845 |
memory/3768-175-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3768-177-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3768-178-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3116-179-0x0000000002DD0000-0x0000000002E27000-memory.dmp
memory/3768-180-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3768-191-0x0000000061E00000-0x0000000061EF3000-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/3768-236-0x0000000000400000-0x000000000046C000-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/3768-249-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3768-250-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3768-251-0x0000000000400000-0x000000000046C000-memory.dmp
memory/3768-252-0x0000000000400000-0x000000000046C000-memory.dmp