Analysis Overview
SHA256
f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c
Threat Level: Known bad
The file f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c was found to be: Known bad.
Malicious Activity Summary
Vidar
Djvu Ransomware
Detected Djvu ransomware
Vidar Stealer
Executes dropped EXE
Downloads MZ/PE file
Loads dropped DLL
Reads user/profile data of web browsers
Modifies file permissions
Checks computer location settings
Looks up external IP address via web service
Accesses 2FA software files, possible credential harvesting
Checks installed software on the system
Adds Run key to start application
Accesses cryptocurrency files/wallets, possible credential harvesting
Drops file in System32 directory
Suspicious use of SetThreadContext
Enumerates physical storage devices
Enumerates system info in registry
Checks processor information in registry
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Modifies system certificate store
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-04-24 06:52
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-04-24 06:52
Reported
2022-04-24 06:55
Platform
win10v2004-20220414-en
Max time kernel
102s
Max time network
135s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
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Djvu Ransomware
Vidar
Vidar Stealer
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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Downloads MZ/PE file
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\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-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6e268579-67bc-48e3-a3a3-22763591b9e7\\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.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 |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{99FBD245-41C4-41FA-B20E-434A752B6388}.catalogItem | C:\Windows\System32\svchost.exe | N/A |
| File created | C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{1B3B2D92-0657-4A3F-9F1B-4FF67B331572}.catalogItem | C:\Windows\System32\svchost.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4120 set thread context of 2264 | N/A | C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe | C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe |
| PID 456 set thread context of 428 | N/A | C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe | C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe |
| PID 1464 set thread context of 5096 | N/A | C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe | C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\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:\Windows\System32\svchost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Windows\System32\svchost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\System32\svchost.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\BIOS | C:\Windows\System32\svchost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU | C:\Windows\System32\svchost.exe | N/A |
Modifies system certificate store
| Description | Indicator | Process | Target |
| Set value (data) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 | C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 | C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe
"C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe"
C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe
"C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\6e268579-67bc-48e3-a3a3-22763591b9e7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe
"C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe" --Admin IsNotAutoStart IsNotTask
C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe
"C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe
"C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe"
C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe
"C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| DE | 162.0.217.254:443 | api.2ip.ua | tcp |
| DE | 162.0.217.254:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | zerit.top | udp |
| US | 8.8.8.8:53 | fuyt.org | udp |
| DO | 186.7.77.26:80 | fuyt.org | tcp |
| KR | 58.235.189.190:80 | zerit.top | tcp |
| US | 8.8.8.8:53 | storesdk.dsx.mp.microsoft.com | udp |
| FR | 2.18.109.224:443 | storesdk.dsx.mp.microsoft.com | tcp |
| DO | 186.7.77.26:80 | fuyt.org | tcp |
| US | 8.8.8.8:53 | t.me | udp |
| NL | 149.154.167.99:443 | t.me | tcp |
| DE | 116.202.1.195:80 | 116.202.1.195 | tcp |
| DE | 116.202.1.195:80 | 116.202.1.195 | tcp |
Files
memory/2264-130-0x0000000000000000-mapping.dmp
memory/2264-131-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2264-132-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4120-133-0x0000000000793000-0x0000000000825000-memory.dmp
memory/4120-135-0x00000000021F0000-0x000000000230B000-memory.dmp
memory/2264-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2264-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4648-137-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\6e268579-67bc-48e3-a3a3-22763591b9e7\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe
| MD5 | 3c4d37ac1703374663c1932f3cece4b9 |
| SHA1 | d9c55b7c8f687a38a44f2e66882cece1c29f4b0e |
| SHA256 | f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c |
| SHA512 | 7085c6e3045e56e43865a9214d5d5e02889e725dd831c81784ddb2cf059683e2b2fa981a56fbf8262477738d9627fa0b0e5800747f6dccfcbb5e41f213afe960 |
memory/456-139-0x0000000000000000-mapping.dmp
memory/428-140-0x0000000000000000-mapping.dmp
memory/428-143-0x0000000000400000-0x0000000000537000-memory.dmp
memory/428-144-0x0000000000400000-0x0000000000537000-memory.dmp
memory/456-145-0x0000000002180000-0x000000000229B000-memory.dmp
memory/428-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/456-142-0x00000000020EB000-0x000000000217D000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | ad8e032271f02af2a955ce10661cc3a8 |
| SHA1 | 967d1bd99bea34c3110cc75c0c0d8b8565eae9f9 |
| SHA256 | d5081bf75d530e9336a6da0f9142bc10f4d06368c365cf0e33f7c99b0f643ce8 |
| SHA512 | bc69dfb03284cf1b8d172ff55938f238b928a0c7846306d8232ab697f54c771a9acf8b0e04a85e149da87ea8cfd9395605d0d95afc30eae1793e91399aa7eef7 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | dc5a7aa8b7dfa4f3af59dbd003032c5e |
| SHA1 | 97c4f37dd7fff45c0ac5bf14ae063d419bfe8c70 |
| SHA256 | b057fd6cd1e7bb324da28f5ff3a3f698de762d9abc0a6d2a16a81ed435e96735 |
| SHA512 | 7995e3fc66a418f3888196eb3791eb966f1464939a04fcc3e5bf0efb4a6e9000bd40f3455f6e41811503a9b448f369c8042054f3e74d8fde59ef29f698eb5e5e |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | aea34c8b51da7cdf4c2b7de56f55e319 |
| SHA1 | 6f80a943d27b8c4cb34e83dfd87fa5fdb73e4589 |
| SHA256 | 31234eb58e907490380759306f13d91d664e9e75cc8220a82c03550b12541e5a |
| SHA512 | 852bc6fda6199f875568ca25ea446be0eba546551c6108f22ea8e14ae9c36f97f5b902adc699c42c32473b7506935b03609270bd773e78c94db97fa753e2dc52 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | d9c694c2d95c6812aa0be903de46da96 |
| SHA1 | df1a733a9c6c27997c798ae4c5715cabe1ffa5e4 |
| SHA256 | f6f85bc0d1770803a206fbfb83c4cb888b3a24b494feac38baa3ea764cda37c0 |
| SHA512 | 97a2eddf197aa74d1d05241008ead092f836b561bc1ad1d731d91db23d6dcce7a65d3dc1609384a3ad3fd5c858bae6c3a4361588b5a965ebf233f14410864793 |
memory/1464-151-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe
| MD5 | ad1b502b6714c0a374b055332018974b |
| SHA1 | 672f4e44475177ddcb1bfa73db3c5dee0f031bc2 |
| SHA256 | f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95 |
| SHA512 | 0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e |
C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe
| MD5 | ad1b502b6714c0a374b055332018974b |
| SHA1 | 672f4e44475177ddcb1bfa73db3c5dee0f031bc2 |
| SHA256 | f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95 |
| SHA512 | 0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e |
memory/5096-154-0x0000000000000000-mapping.dmp
memory/5096-155-0x0000000000400000-0x000000000044C000-memory.dmp
C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe
| MD5 | ad1b502b6714c0a374b055332018974b |
| SHA1 | 672f4e44475177ddcb1bfa73db3c5dee0f031bc2 |
| SHA256 | f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95 |
| SHA512 | 0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e |
memory/5096-158-0x0000000000400000-0x000000000044C000-memory.dmp
memory/1464-157-0x0000000000538000-0x0000000000562000-memory.dmp
memory/1464-159-0x00000000020E0000-0x0000000002129000-memory.dmp
memory/5096-160-0x0000000000400000-0x000000000044C000-memory.dmp
memory/5096-161-0x0000000000400000-0x000000000044C000-memory.dmp
memory/5096-162-0x0000000060900000-0x0000000060992000-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 |