Analysis Overview
SHA256
644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e
Threat Level: Known bad
The file 644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e was found to be: Known bad.
Malicious Activity Summary
Vidar
Detected Djvu ransomware
Djvu Ransomware
Downloads MZ/PE file
Executes dropped EXE
Checks computer location settings
Modifies file permissions
Loads dropped DLL
Reads user/profile data of web browsers
Accesses 2FA software files, possible credential harvesting
Checks installed software on the system
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
Delays execution with timeout.exe
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
2023-01-07 23:34
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-01-07 23:34
Reported
2023-01-07 23:37
Platform
win10v2004-20221111-en
Max time kernel
65s
Max time network
128s
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\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\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-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e37d6e01-1d7d-4083-b837-54ca3caf8de3\\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.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 4668 set thread context of 2076 | N/A | C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe | C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe |
| PID 1672 set thread context of 1116 | N/A | C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe | C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe |
| PID 4836 set thread context of 116 | N/A | C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe | C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\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\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\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\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe
"C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe"
C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe
"C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\e37d6e01-1d7d-4083-b837-54ca3caf8de3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe
"C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe
"C:\Users\Admin\AppData\Local\Temp\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe
"C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe"
C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build3.exe
"C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\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\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe
"C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe" & exit
C:\Windows\SysWOW64\timeout.exe
timeout /t 6
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 |
| N/A | 8.8.8.8:53 | api.2ip.ua | udp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 162.0.217.254:443 | api.2ip.ua | tcp |
| N/A | 8.8.8.8:53 | uaery.top | udp |
| N/A | 8.8.8.8:53 | spaceris.com | udp |
| N/A | 203.91.116.53:80 | spaceris.com | tcp |
| N/A | 187.170.238.164:80 | spaceris.com | tcp |
| N/A | 187.170.238.164:80 | spaceris.com | tcp |
| N/A | 8.8.8.8:53 | t.me | udp |
| N/A | 149.154.167.99:443 | t.me | tcp |
| N/A | 94.130.190.48:80 | 94.130.190.48 | tcp |
| N/A | 52.182.143.208:443 | tcp | |
| N/A | 87.248.202.1:80 | tcp | |
| N/A | 87.248.202.1:80 | tcp | |
| N/A | 87.248.202.1:80 | tcp |
Files
memory/2076-132-0x0000000000000000-mapping.dmp
memory/2076-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2076-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4668-135-0x00000000031FA000-0x000000000328C000-memory.dmp
memory/4668-136-0x0000000004D50000-0x0000000004E6B000-memory.dmp
memory/2076-137-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2076-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3876-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\e37d6e01-1d7d-4083-b837-54ca3caf8de3\644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e.exe
| MD5 | 34dc38f85270af17408aa9a77ca4ea45 |
| SHA1 | 4c4ba71b9135f004d6c036b35d2434b6259cda5e |
| SHA256 | 644032e64ebaa7d7972f196f211d0351cd10546fafeb3af7091f8f22697ee44e |
| SHA512 | 1430ab355f76da69623894f075db6a331067cbb46cbb3124ca77ae6533e3950e3a803683a4f3dbce90d7204721bac41ab0e4998ff44ddc8475a7472827c19870 |
memory/1672-141-0x0000000000000000-mapping.dmp
memory/2076-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1116-143-0x0000000000000000-mapping.dmp
memory/1116-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1672-146-0x0000000004D81000-0x0000000004E13000-memory.dmp
memory/1116-147-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 7c56401cb6bd1ae402e06f0fe35f81c4 |
| SHA1 | b82bbb9fa39266796cafcd308ef4300fc92e3399 |
| SHA256 | 0c58c7bc18d38a3096da6f3575f1c6f8d79b69382d8e89bb5fca917d3cdb7f65 |
| SHA512 | 2ea607c2dc04c8ef34ecb4c4bd297e0f0882b179303565863d1745172322133b78186fa04334e82c135e25fd717719ceec917f49682a4eac37034ea87bb2b6f3 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | 29cbedd88f20375ff7d4135f690444b3 |
| SHA1 | 24fdd9b611943da098bf9124305d7aefe5edfa94 |
| SHA256 | 5c27fdcc593f93fae4a713eaa7edc2a38df4f87edb8f2aae8382174ca3ef49c4 |
| SHA512 | 72b626cf4a4ff59ae89b319b3210b391c808ca6c8cb45b0878879b589ea6145c505e05b9f3a2cff2e00f00b3e6c0c6a693d274a65a34111da42858dbea12c2a0 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 1c3409ebb7628da2e968c60c5df4b379 |
| SHA1 | 06a606a471a832dbf97a7d63c9c2a3f03e8b9ee1 |
| SHA256 | 055c60d46dbb03d0efae24a1042146745b6cf214c57c94f5f206607d271e698b |
| SHA512 | 7dab4e9415b92ef4fc3d86f419dbed7bf1dcad387ef6b10deb9937df2517003fae941cf7824f084aa6edd8420e728bec2fce496013dc1249fcb8244bd326e473 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 411cd537dcecbf901759b8e6c1bdb076 |
| SHA1 | 655df9870867a1760ad1a2c967b330c61767437a |
| SHA256 | aa9e441c6cf813efd9ba76fe4ae52d884a5c7d222ed221903c42f09bc14eb7db |
| SHA512 | ea780f875c86f8694f67d236a0af066b952862356edb681375e6c387103a91ce085345359f8fe83dd630d310ee6b7637512e5868951c4c257daa411ab9c03e71 |
memory/1116-152-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4836-153-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe
| MD5 | 8c14bb1505244971374a88f37a4ec22a |
| SHA1 | cebd478fd7ca3956c983fb3e33e2cbb7c54fa4d0 |
| SHA256 | f333289bf29805ee697908ecb974aeb81206b471252ec2e51f382d53ac35d962 |
| SHA512 | 5e08686f2cbc783716442004d39ee11a4fabec7aaa92f33f758df7861ed0730c211551ecb85dd9dc93c2b83983fc4df08bcfeeb38c9e51bd3dcd138b10cf103e |
C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe
| MD5 | 8c14bb1505244971374a88f37a4ec22a |
| SHA1 | cebd478fd7ca3956c983fb3e33e2cbb7c54fa4d0 |
| SHA256 | f333289bf29805ee697908ecb974aeb81206b471252ec2e51f382d53ac35d962 |
| SHA512 | 5e08686f2cbc783716442004d39ee11a4fabec7aaa92f33f758df7861ed0730c211551ecb85dd9dc93c2b83983fc4df08bcfeeb38c9e51bd3dcd138b10cf103e |
memory/644-156-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/808-159-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/116-160-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\2b853823-00fa-454f-b2fc-e8baf3ff6e41\build2.exe
| MD5 | 8c14bb1505244971374a88f37a4ec22a |
| SHA1 | cebd478fd7ca3956c983fb3e33e2cbb7c54fa4d0 |
| SHA256 | f333289bf29805ee697908ecb974aeb81206b471252ec2e51f382d53ac35d962 |
| SHA512 | 5e08686f2cbc783716442004d39ee11a4fabec7aaa92f33f758df7861ed0730c211551ecb85dd9dc93c2b83983fc4df08bcfeeb38c9e51bd3dcd138b10cf103e |
memory/116-161-0x0000000000400000-0x0000000000460000-memory.dmp
memory/116-163-0x0000000000400000-0x0000000000460000-memory.dmp
memory/116-165-0x0000000000400000-0x0000000000460000-memory.dmp
memory/4836-166-0x0000000001F90000-0x0000000001FDC000-memory.dmp
memory/4836-164-0x00000000004B8000-0x00000000004E5000-memory.dmp
memory/116-167-0x0000000000400000-0x0000000000460000-memory.dmp
memory/1116-168-0x0000000000400000-0x0000000000537000-memory.dmp
memory/116-169-0x00000000509C0000-0x0000000050A52000-memory.dmp
C:\ProgramData\nss3.dll
| MD5 | bfac4e3c5908856ba17d41edcd455a51 |
| SHA1 | 8eec7e888767aa9e4cca8ff246eb2aacb9170428 |
| SHA256 | e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78 |
| SHA512 | 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66 |
C:\ProgramData\mozglue.dll
| MD5 | 8f73c08a9660691143661bf7332c3c27 |
| SHA1 | 37fa65dd737c50fda710fdbde89e51374d0c204a |
| SHA256 | 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd |
| SHA512 | 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89 |
memory/116-190-0x0000000000400000-0x0000000000460000-memory.dmp
memory/4600-191-0x0000000000000000-mapping.dmp
memory/116-192-0x0000000000400000-0x0000000000460000-memory.dmp
memory/4088-193-0x0000000000000000-mapping.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/2568-196-0x0000000000000000-mapping.dmp