Analysis Overview
SHA256
f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742
Threat Level: Known bad
The file f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742 was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Djvu Ransomware
Modifies file permissions
Checks computer location settings
Adds Run key to start application
Looks up external IP address via web service
Suspicious use of SetThreadContext
Enumerates physical storage devices
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-22 10:20
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-22 10:20
Reported
2024-05-22 10:23
Platform
win11-20240426-en
Max time kernel
144s
Max time network
126s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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Djvu Ransomware
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\icacls.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3938118698-2964058152-2337880935-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0666dc5e-e375-4d0c-b8fe-6ab42b638728\\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe | N/A |
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 3316 set thread context of 1792 | N/A | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe |
| PID 996 set thread context of 2384 | N/A | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
"C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe"
C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
"C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\0666dc5e-e375-4d0c-b8fe-6ab42b638728" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
"C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
"C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 188.114.96.2:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 2.96.114.188.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 91.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.169.217.172.in-addr.arpa | udp |
| US | 188.114.96.2:443 | api.2ip.ua | tcp |
| MX | 189.181.49.206:80 | cajgtus.com | tcp |
| KG | 31.192.250.185:80 | sdfjhuz.com | tcp |
| MX | 189.181.49.206:80 | cajgtus.com | tcp |
| MX | 189.181.49.206:80 | cajgtus.com | tcp |
| MX | 189.181.49.206:80 | cajgtus.com | tcp |
| MX | 189.181.49.206:80 | cajgtus.com | tcp |
Files
memory/3316-1-0x0000000004A10000-0x0000000004AAC000-memory.dmp
memory/3316-2-0x0000000004BD0000-0x0000000004CEB000-memory.dmp
memory/1792-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1792-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1792-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1792-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\0666dc5e-e375-4d0c-b8fe-6ab42b638728\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
| MD5 | 5855e0aa6fddd49c2a10916168549895 |
| SHA1 | 961fbc732efcfc4842ab4bd356be530dfb383149 |
| SHA256 | f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742 |
| SHA512 | 4af9581ca386412911b91de2fb6bc1ab14a3a98a6b5f72077a243b30ccf894c6e0de7ad906587c015d5776271faaff6d6aebf9f09506c1274b06d20607f1ecfb |
memory/1792-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2384-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | d4e7aab7b5444065c9d0cec65a96e46a |
| SHA1 | ead5cfb5adb69e7b6e43ec1db200cdd0d07fc4cb |
| SHA256 | 2736e262f3af082048cef5f960f63f0103d8d4081215c7b5775284be3daad056 |
| SHA512 | 29fb98ce25b5a6eeca9fdeef1e7013c4d6d556e9786f5b007c0a984695d0c66473c4df1d4cdb21aaeb457fc933f3c8120c277c6c9f98b0eb308e63e91656fdb5 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 6728aea2631b86a76c237508d8ba9b55 |
| SHA1 | 7a670f95cac088313f7558869162fe01c6dc0ec9 |
| SHA256 | e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b |
| SHA512 | 533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 0a3c103c6ea6c2101c4b4936cd5768c9 |
| SHA1 | 00c903563abcd5e3ed4d8392c7d68f6c49a1c46c |
| SHA256 | b1d7c96a8451ec1d09daa5f467706c946d5bae3e17d9109597164d1b6a66ebd5 |
| SHA512 | 327b56f7fcbe9f2976f3289365a7865835b5fa2f0fa65c22f4540889dfa90db5352a10db4be8e4d3a76a701856904ab72bc7066b4848807a11e9f3219a5864e5 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
memory/2384-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2384-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2384-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2384-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2384-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2384-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2384-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2384-37-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-22 10:20
Reported
2024-05-22 10:23
Platform
win10v2004-20240426-en
Max time kernel
149s
Max time network
150s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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Djvu Ransomware
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe | N/A |
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\icacls.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f1ad07f1-27b5-44c3-99d9-5e8c3ec453f2\\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe | N/A |
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 4444 set thread context of 2372 | N/A | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe |
| PID 2896 set thread context of 3684 | N/A | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe | C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
"C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe"
C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
"C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\f1ad07f1-27b5-44c3-99d9-5e8c3ec453f2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
"C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
"C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 24.65.21.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 82.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.159.190.20.in-addr.arpa | udp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| SA | 94.98.224.40:80 | cajgtus.com | tcp |
| MX | 187.225.243.180:80 | cajgtus.com | tcp |
| SA | 94.98.224.40:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 40.224.98.94.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 180.243.225.187.in-addr.arpa | udp |
| SA | 94.98.224.40:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| SA | 94.98.224.40:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| SA | 94.98.224.40:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 45.19.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| NL | 23.62.61.155:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 155.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | udp |
Files
memory/2372-2-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2372-6-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4444-3-0x00000000049B0000-0x0000000004ACB000-memory.dmp
memory/4444-1-0x0000000004910000-0x00000000049AB000-memory.dmp
C:\Users\Admin\AppData\Local\f1ad07f1-27b5-44c3-99d9-5e8c3ec453f2\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
| MD5 | 5855e0aa6fddd49c2a10916168549895 |
| SHA1 | 961fbc732efcfc4842ab4bd356be530dfb383149 |
| SHA256 | f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742 |
| SHA512 | 4af9581ca386412911b91de2fb6bc1ab14a3a98a6b5f72077a243b30ccf894c6e0de7ad906587c015d5776271faaff6d6aebf9f09506c1274b06d20607f1ecfb |
memory/2372-17-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3684-20-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | a7bf5da62f401908e55503edf8e3fa34 |
| SHA1 | 0abb4e930a8b53547f65efa022c9ae13c41dae7e |
| SHA256 | a929981e6a473dff1e790fb70435586131a81e532e07578ae42e0f9adb1aa73f |
| SHA512 | 0ee2b8719f117719e05d4e29c5ebfe031053836ecd7e2467caca83cc91297b80568d01f0f57a07785c315fa3b95f8b094244da19ee2604aca3b03fe49ef4fb47 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 6728aea2631b86a76c237508d8ba9b55 |
| SHA1 | 7a670f95cac088313f7558869162fe01c6dc0ec9 |
| SHA256 | e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b |
| SHA512 | 533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | ca42d8a7810a1cc7a6d7ae7c7afeccb3 |
| SHA1 | a8fc142d555d94b5923041e0796af94d3ac0d336 |
| SHA256 | 51d25da229cd290a85d6273fa5edad90052f492e30a8673520f899c08d54a521 |
| SHA512 | 09db8c4fb42d66beb7ee2a1efbd0e892af4f0470d9514d8597c3301ac21f3c0c9267ccd8c7e1bd8437476002afca50d88973429252e00e25d11ffe4de1fe459c |
memory/3684-25-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3684-26-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3684-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3684-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3684-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3684-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3684-33-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3684-35-0x0000000000400000-0x0000000000537000-memory.dmp