Analysis Overview
SHA256
a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5
Threat Level: Known bad
The file a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5 was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Djvu Ransomware
Checks computer location settings
Modifies file permissions
Adds Run key to start application
Looks up external IP address via web service
Suspicious use of SetThreadContext
Unsigned PE
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-21 19:14
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-21 19:14
Reported
2024-05-21 19:17
Platform
win10v2004-20240426-en
Max time kernel
141s
Max time network
129s
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\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.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\\335fcf07-9df7-4d3d-b6ef-17f5c081e04e\\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.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 404 set thread context of 856 | N/A | C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe | C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe |
| PID 3300 set thread context of 4768 | N/A | C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe | C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\335fcf07-9df7-4d3d-b6ef-17f5c081e04e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 144.107.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | sdfjhuz.com | udp |
| US | 8.8.8.8:53 | cajgtus.com | udp |
| SI | 93.103.167.123:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 123.167.103.93.in-addr.arpa | udp |
| NL | 23.62.61.160:443 | www.bing.com | tcp |
| MX | 187.209.157.57:80 | sdfjhuz.com | tcp |
| SI | 93.103.167.123:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 160.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.157.209.187.in-addr.arpa | udp |
| NL | 23.62.61.160:443 | www.bing.com | tcp |
| SI | 93.103.167.123:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| SI | 93.103.167.123:80 | cajgtus.com | tcp |
| SI | 93.103.167.123:80 | cajgtus.com | tcp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.236.111.52.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 | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
Files
memory/404-1-0x0000000002510000-0x00000000025AD000-memory.dmp
memory/404-2-0x0000000004150000-0x000000000426B000-memory.dmp
memory/856-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/856-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/856-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/856-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\335fcf07-9df7-4d3d-b6ef-17f5c081e04e\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
| MD5 | 8858045135c3537e4cc0ea6c49532cc4 |
| SHA1 | 03ea0b26b5766dfcf0cb376a408251755bb608f5 |
| SHA256 | a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5 |
| SHA512 | 24edb6df506ed00d808f69e6494cdbaafa98c3387e698f2a0312b4feecf1a4008959c18e55f4b2ac62e488728cc0988d5b6b447c62b4e8b48b8faf4f1ea7a879 |
memory/856-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4768-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 991e196c1a868bec1d72cff5e169b98a |
| SHA1 | d3c9d775393ba7aa6e8369dcce8348ae75efff90 |
| SHA256 | 6dd434bcb6027f43d2b87519e7657fd4b62b356aaeb7c9db7ef25a0b3657bbc8 |
| SHA512 | c903f9393fffb9566f5f2038902ad7aab8046a6ad8cca38e46b609ce5eb9ed2975c746fa3456626770badd2624390bc337c532140bf29393028d95463f42fb69 |
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\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | bb94a67d131c34761ddfe7f90d464b05 |
| SHA1 | 5535ea164296be3e24a24395a53939ee381c27af |
| SHA256 | fddfc5e2266dbb086164d4805589b85adacede43f1ae9f447bb55ba369979781 |
| SHA512 | 0fa6ab12ad6d94f946319ac01e115e2ca29c3a5da29841c583ba532733729d050dae25c5bac2edf64ed3e3cef023650912d73c9bd959030ae2c2547b17c4b7b4 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | a1d955617a4d146e70544d0d9a0390ca |
| SHA1 | 5ffdc4453b23e24a7cb0e634b26864c169f5257b |
| SHA256 | 8dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3 |
| SHA512 | 0bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810 |
memory/4768-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4768-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4768-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4768-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4768-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4768-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4768-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4768-37-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-21 19:14
Reported
2024-05-21 19:17
Platform
win11-20240426-en
Max time kernel
142s
Max time network
123s
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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ec2f0452-d2cd-4ba1-bccd-1f917d64f456\\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.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 4820 set thread context of 832 | N/A | C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe | C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe |
| PID 5112 set thread context of 4136 | N/A | C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe | C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\ec2f0452-d2cd-4ba1-bccd-1f917d64f456" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
"C:\Users\Admin\AppData\Local\Temp\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| SI | 93.103.167.123:80 | cajgtus.com | tcp |
| MX | 189.143.204.149:80 | sdfjhuz.com | tcp |
| SI | 93.103.167.123:80 | cajgtus.com | tcp |
| SI | 93.103.167.123:80 | cajgtus.com | tcp |
| SI | 93.103.167.123:80 | cajgtus.com | tcp |
| SI | 93.103.167.123:80 | cajgtus.com | tcp |
Files
memory/4820-1-0x00000000026B0000-0x000000000274B000-memory.dmp
memory/4820-2-0x00000000041F0000-0x000000000430B000-memory.dmp
memory/832-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/832-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/832-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/832-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\ec2f0452-d2cd-4ba1-bccd-1f917d64f456\a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5.exe
| MD5 | 8858045135c3537e4cc0ea6c49532cc4 |
| SHA1 | 03ea0b26b5766dfcf0cb376a408251755bb608f5 |
| SHA256 | a5a27167e98c1ee093349bc0b341b8a9c73b0c43771b4b860c5ee72881a620a5 |
| SHA512 | 24edb6df506ed00d808f69e6494cdbaafa98c3387e698f2a0312b4feecf1a4008959c18e55f4b2ac62e488728cc0988d5b6b447c62b4e8b48b8faf4f1ea7a879 |
memory/832-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | a1d955617a4d146e70544d0d9a0390ca |
| SHA1 | 5ffdc4453b23e24a7cb0e634b26864c169f5257b |
| SHA256 | 8dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3 |
| SHA512 | 0bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 122123fc98ae8ff0cca16e51149c0578 |
| SHA1 | 026c2b6bce228c25cb0be80ec973a3331579ab73 |
| SHA256 | 53bbae2a580744aaa9f38180326644c690a8a419748b23fc310a03a6d0d0e09c |
| SHA512 | 06b2fa1271698bf7032ed7bd79e47d27e6d28a9dc5b9bd5b5671cd5c5f5824a5433cf3569bfcee5c0b665834df8a649484f64ceab0f42533efef68fcdc29ef60 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | bb39a70c259e83fe6a18f76077dda895 |
| SHA1 | 2a485f4f32eae7aa4171a8b087e1ce5edd94d287 |
| SHA256 | 7b563a58e88720ba14aac66312ab440d3c5bd68b3be89356fba308914f8e314a |
| SHA512 | 36b669b694604508e87ebf5b8a0b7fae7f29a89a348494ebde5a0dae1f74911b60123d0954eaaac3cda74671e5278f9a939a00691fe144e656defaa40ee5dbb0 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
| MD5 | 8202a1cd02e7d69597995cabbe881a12 |
| SHA1 | 8858d9d934b7aa9330ee73de6c476acf19929ff6 |
| SHA256 | 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5 |
| SHA512 | 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9 |
memory/4136-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-33-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4136-37-0x0000000000400000-0x0000000000537000-memory.dmp