Analysis Overview
SHA256
1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c
Threat Level: Known bad
The file 1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Vidar
Djvu Ransomware
Downloads MZ/PE file
Executes dropped EXE
Loads dropped DLL
Modifies file permissions
Checks computer location settings
Reads user/profile data of web browsers
Adds Run key to start application
Accesses 2FA software files, possible credential harvesting
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Looks up external IP address via web service
Suspicious use of SetThreadContext
Enumerates physical storage devices
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-01-07 21:24
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-01-07 21:24
Reported
2023-01-07 21:27
Platform
win10v2004-20221111-en
Max time kernel
69s
Max time network
144s
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\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build3.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\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-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e818076a-ee2f-48a0-9b59-57531bddad3b\\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.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 4572 set thread context of 4896 | N/A | C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe | C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe |
| PID 1068 set thread context of 3744 | N/A | C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe | C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe |
| PID 1512 set thread context of 2444 | N/A | C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe | C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\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\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\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\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe
"C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe"
C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe
"C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\e818076a-ee2f-48a0-9b59-57531bddad3b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe
"C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe
"C:\Users\Admin\AppData\Local\Temp\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe
"C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe"
C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build3.exe
"C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\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\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe
"C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\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\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe" & exit
C:\Windows\SysWOW64\timeout.exe
timeout /t 6
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 | 211.53.230.67:80 | uaery.top | tcp |
| N/A | 203.91.116.53:80 | spaceris.com | tcp |
| N/A | 203.91.116.53:80 | 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 | 93.184.221.240:80 | tcp | |
| N/A | 104.80.225.205:443 | tcp | |
| N/A | 52.182.143.211:443 | tcp | |
| N/A | 87.248.202.1:80 | tcp | |
| N/A | 87.248.202.1:80 | tcp |
Files
memory/4896-132-0x0000000000000000-mapping.dmp
memory/4896-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4896-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4572-135-0x0000000004D5E000-0x0000000004DEF000-memory.dmp
memory/4572-137-0x0000000004EB0000-0x0000000004FCB000-memory.dmp
memory/4896-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4896-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1404-139-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\e818076a-ee2f-48a0-9b59-57531bddad3b\1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c.exe
| MD5 | cb4519fd4f7e46a3a02ed3f1c55d3d19 |
| SHA1 | a816410038ed47f3481cd69793a7a87a9afef5e3 |
| SHA256 | 1aa2c55eaf77e9daecefeee4111a5e1a1a964cdc792a9e612fb1472a295f2c4c |
| SHA512 | 73dff7aabf221fe1033f1981ce6dcc8e71f3c5b6d064b92c43bc70a63620af2db8b95ffe7d85f42173eeaadc3f269081e62472b601784b354f85e2fffeba067c |
memory/1068-141-0x0000000000000000-mapping.dmp
memory/4896-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3744-143-0x0000000000000000-mapping.dmp
memory/1068-146-0x0000000004CA6000-0x0000000004D37000-memory.dmp
memory/3744-145-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3744-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3744-148-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | b1125d68207a720671ce32535b75d092 |
| SHA1 | 6a259b5cd02729148705e80f42098f572dd2f7b7 |
| SHA256 | 46c799e7e8937e2ce27de6ef70e431530ef12c6f15ada0c94654b77c74bb2ace |
| SHA512 | 0f2787bfa172ec9d57456efd4cbd93c5fc046438de1ec1e2627db90e59d6fbf8579ace5d67765f78b6dbf2dd81d09452e9ed6a25ba52116b9d01f304373995eb |
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\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
| MD5 | 411cd537dcecbf901759b8e6c1bdb076 |
| SHA1 | 655df9870867a1760ad1a2c967b330c61767437a |
| SHA256 | aa9e441c6cf813efd9ba76fe4ae52d884a5c7d222ed221903c42f09bc14eb7db |
| SHA512 | ea780f875c86f8694f67d236a0af066b952862356edb681375e6c387103a91ce085345359f8fe83dd630d310ee6b7637512e5868951c4c257daa411ab9c03e71 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
| MD5 | ee0cd1510642f95386d5b21027c188f5 |
| SHA1 | 786368b2aaf285847e1e623e0ffc12e4b54f192d |
| SHA256 | e16b05526f7d399a4937dab298765c5cbe5a1119dfbeb55d3cb114969baff16e |
| SHA512 | 00aa49ae98ff16228b7b1c9594a025552312b70fd624159457f246707856f244134aa7624afa0fd31ab97b636887b11205b1be5d10c5405347bace375babfd37 |
memory/1512-153-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe
| MD5 | 8c14bb1505244971374a88f37a4ec22a |
| SHA1 | cebd478fd7ca3956c983fb3e33e2cbb7c54fa4d0 |
| SHA256 | f333289bf29805ee697908ecb974aeb81206b471252ec2e51f382d53ac35d962 |
| SHA512 | 5e08686f2cbc783716442004d39ee11a4fabec7aaa92f33f758df7861ed0730c211551ecb85dd9dc93c2b83983fc4df08bcfeeb38c9e51bd3dcd138b10cf103e |
C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe
| MD5 | 8c14bb1505244971374a88f37a4ec22a |
| SHA1 | cebd478fd7ca3956c983fb3e33e2cbb7c54fa4d0 |
| SHA256 | f333289bf29805ee697908ecb974aeb81206b471252ec2e51f382d53ac35d962 |
| SHA512 | 5e08686f2cbc783716442004d39ee11a4fabec7aaa92f33f758df7861ed0730c211551ecb85dd9dc93c2b83983fc4df08bcfeeb38c9e51bd3dcd138b10cf103e |
memory/4656-156-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build3.exe
| MD5 | 9ead10c08e72ae41921191f8db39bc16 |
| SHA1 | abe3bce01cd34afc88e2c838173f8c2bd0090ae1 |
| SHA256 | 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0 |
| SHA512 | aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a |
memory/5080-159-0x0000000000000000-mapping.dmp
memory/2444-160-0x0000000000000000-mapping.dmp
memory/2444-161-0x0000000000400000-0x0000000000460000-memory.dmp
C:\Users\Admin\AppData\Local\b7dadc63-b66d-428b-84ee-902ff5fead75\build2.exe
| MD5 | 8c14bb1505244971374a88f37a4ec22a |
| SHA1 | cebd478fd7ca3956c983fb3e33e2cbb7c54fa4d0 |
| SHA256 | f333289bf29805ee697908ecb974aeb81206b471252ec2e51f382d53ac35d962 |
| SHA512 | 5e08686f2cbc783716442004d39ee11a4fabec7aaa92f33f758df7861ed0730c211551ecb85dd9dc93c2b83983fc4df08bcfeeb38c9e51bd3dcd138b10cf103e |
memory/2444-164-0x0000000000400000-0x0000000000460000-memory.dmp
memory/2444-166-0x0000000000400000-0x0000000000460000-memory.dmp
memory/1512-165-0x0000000002120000-0x000000000216C000-memory.dmp
memory/1512-163-0x0000000000528000-0x0000000000555000-memory.dmp
memory/2444-167-0x0000000000400000-0x0000000000460000-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/2196-170-0x0000000000000000-mapping.dmp
memory/3744-171-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2444-172-0x0000000050AC0000-0x0000000050B52000-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/2444-193-0x0000000000400000-0x0000000000460000-memory.dmp
memory/3252-194-0x0000000000000000-mapping.dmp
memory/2444-195-0x0000000000400000-0x0000000000460000-memory.dmp
memory/4252-196-0x0000000000000000-mapping.dmp