Analysis Overview
SHA256
25a605a5eb395c355f464bdec7a391985069ce226ce75675e0df281ccb98c7d5
Threat Level: Known bad
The file 753a72923bbbcde52682c31fcc134124 was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Djvu Ransomware
Modifies file permissions
Checks computer location settings
Looks up external IP address via web service
Adds Run key to start application
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
2024-01-25 18:40
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-25 18:40
Reported
2024-01-25 18:43
Platform
win7-20231215-en
Max time kernel
146s
Max time network
120s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
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-1-5-21-1268429524-3929314613-1992311491-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c836a456-77bf-4228-be4d-8ab3517ba2c4\\753a72923bbbcde52682c31fcc134124.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.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 1308 set thread context of 2848 | N/A | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe |
| PID 2780 set thread context of 2092 | N/A | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"
C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\c836a456-77bf-4228-be4d-8ab3517ba2c4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | api.2ip.ua | udp |
| US | 188.114.97.2:443 | api.2ip.ua | tcp |
| US | 188.114.97.2:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | securebiz.org | udp |
| US | 8.8.8.8:53 | astdg.top | udp |
Files
memory/1308-0-0x0000000000220000-0x00000000002B1000-memory.dmp
memory/1308-2-0x0000000000220000-0x00000000002B1000-memory.dmp
memory/2848-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1308-4-0x0000000002180000-0x000000000229B000-memory.dmp
memory/2848-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2848-7-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2848-8-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\c836a456-77bf-4228-be4d-8ab3517ba2c4\753a72923bbbcde52682c31fcc134124.exe
| MD5 | 753a72923bbbcde52682c31fcc134124 |
| SHA1 | 7a7a4ef36dc84994c250b32d03d8398c5116e091 |
| SHA256 | 25a605a5eb395c355f464bdec7a391985069ce226ce75675e0df281ccb98c7d5 |
| SHA512 | 303ae0cc51e7d41321c0f44ebcd0f5d8284cd16e79f3529102628cb99e637cea6a0aa4d2bf17bc8491ef2d62ceb8cd87ae3b2b87a8e6e6fc3bd64e564160075d |
memory/2780-28-0x00000000020C0000-0x0000000002151000-memory.dmp
memory/2848-26-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2780-29-0x00000000020C0000-0x0000000002151000-memory.dmp
memory/2092-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2092-35-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | 678800a3e57bf8e58c6c0029c6eb59a4 |
| SHA1 | 915c2153065cb020bca51bc728d2adb669edfd4f |
| SHA256 | fb408821fe73f1922f999ed728af154b47259b5e2fdd8242ac12db54d23294f0 |
| SHA512 | 19da85e00c19a27b88e9ba62af645d0c50a81ab542edbf11c74863ebdd39c9b75bb983967d3a412aa32df4b82206041260b5a867bfe77e498bd480d8d56ebea1 |
C:\Users\Admin\AppData\Local\Temp\Cab780D.tmp
| MD5 | d71dff97ca86ca16c3db8bdb5285fb35 |
| SHA1 | 271c01246897497d069b81ed37af296cf6c1e498 |
| SHA256 | 4a19255504acfbd49c4e1aed722c7e62b50b5742b860eedabc5f46160f8aefac |
| SHA512 | 1fed2a183296b563e35d803927e539d28169895f6ca5b522a1c714f222a2d3e578b1e167b19568b5ad4800b898f7ac041c7bd8f6bb02d1361b32cbdcfb0f682a |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
| MD5 | 904382f280cc9726bb2de9689bc102dc |
| SHA1 | 50f334269a02ac100a0f5bdc4026cbdece181208 |
| SHA256 | 04414f5dd6ae8130ece8b6ef8db7c61fb1a9adace42965c922dc2eb479646c8d |
| SHA512 | 9bbd076b4792a2738504913e4d1f0a1915b975474e0e9726380222792618932c1bfdd494f09791a2569a2e493d748ff080292da175debe64b1eb67942f36f9c6 |
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 | 73a64388fdce3ed14d962171d115ecfc |
| SHA1 | f6492dc95aac06984082b99862e26a23f2cea006 |
| SHA256 | 4a601877f3aef0a40468c3ce5a84cac1f4f0afdf32c89d5530420bcc283c705a |
| SHA512 | 27d18ee1d139e04b43c92db20c6fef5d7a9fe7b602432472d7313e3367df48a987c1fddec9cd46eee30ce097968e83cf280fd0d4b5f3ab2f7736004bdd2a342e |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | d00cc6d25614c515b6e2d64d90033d15 |
| SHA1 | 449ca823652db2a579cbd6b06284ff061147f6ba |
| SHA256 | ab0d18e7b28375f2cc703c9b7c899fb9ea9429783709f358a47e42fe850ed53d |
| SHA512 | 80e6454003cd85122a068c3353defe50ddb97ece70204ebd7c7172093df1ac506e4f023e4b991b4673407ed619d4932439675ba6893d0436ecc927d54f3c9f96 |
memory/2092-49-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2092-48-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2092-50-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2092-53-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2092-56-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2092-55-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2092-57-0x0000000000400000-0x0000000000537000-memory.dmp
memory/2092-58-0x0000000000400000-0x0000000000537000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-25 18:40
Reported
2024-01-25 18:43
Platform
win10v2004-20231222-en
Max time kernel
145s
Max time network
148s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Djvu Ransomware
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.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-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3eeb72eb-4ef6-401d-be37-2fa23c11e5f3\\753a72923bbbcde52682c31fcc134124.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.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 1692 set thread context of 1456 | N/A | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe |
| PID 4396 set thread context of 3084 | N/A | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"
C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\3eeb72eb-4ef6-401d-be37-2fa23c11e5f3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
"C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe" --Admin IsNotAutoStart IsNotTask
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 185.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.160.190.20.in-addr.arpa | udp |
| 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 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.204.58.216.in-addr.arpa | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | securebiz.org | udp |
| US | 8.8.8.8:53 | astdg.top | udp |
| US | 8.8.8.8:53 | astdg.top | udp |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | astdg.top | udp |
| US | 8.8.8.8:53 | astdg.top | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.160.77.104.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 61.179.17.96.in-addr.arpa | udp |
Files
memory/1692-1-0x00000000026A0000-0x000000000273A000-memory.dmp
memory/1692-2-0x0000000002870000-0x000000000298B000-memory.dmp
memory/1456-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1456-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1456-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1456-6-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\Local\3eeb72eb-4ef6-401d-be37-2fa23c11e5f3\753a72923bbbcde52682c31fcc134124.exe
| MD5 | 753a72923bbbcde52682c31fcc134124 |
| SHA1 | 7a7a4ef36dc84994c250b32d03d8398c5116e091 |
| SHA256 | 25a605a5eb395c355f464bdec7a391985069ce226ce75675e0df281ccb98c7d5 |
| SHA512 | 303ae0cc51e7d41321c0f44ebcd0f5d8284cd16e79f3529102628cb99e637cea6a0aa4d2bf17bc8491ef2d62ceb8cd87ae3b2b87a8e6e6fc3bd64e564160075d |
memory/1456-16-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4396-18-0x0000000000AE0000-0x0000000000B79000-memory.dmp
memory/3084-20-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3084-21-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3084-22-0x0000000000400000-0x0000000000537000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | d00cc6d25614c515b6e2d64d90033d15 |
| SHA1 | 449ca823652db2a579cbd6b06284ff061147f6ba |
| SHA256 | ab0d18e7b28375f2cc703c9b7c899fb9ea9429783709f358a47e42fe850ed53d |
| SHA512 | 80e6454003cd85122a068c3353defe50ddb97ece70204ebd7c7172093df1ac506e4f023e4b991b4673407ed619d4932439675ba6893d0436ecc927d54f3c9f96 |
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 | b1c5fc3fe0be24b5046d8d4af405c374 |
| SHA1 | 91a1429dd737fb54ce556a9f52cb6a8734c3927a |
| SHA256 | c9976375152f4323a40e336778955481389a5c309f3e88e04318adbc34630b23 |
| SHA512 | 18835220d917f8773db7ea3063beb09d073d53bcc45319120acc57f79aeb3dd30089b4e929ed4c7c1d8138dd2f61597c6d161e9de8952a22480372cb81d92017 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
| MD5 | b4858a4e5a63d4cc158301a046ae6ac4 |
| SHA1 | 67f0702174f735ba1f1824b2fdb1ef90ed206214 |
| SHA256 | b8c5a9874077bebfc06782732fe60e97361927f8af5dfe382ec5cadb317e56dc |
| SHA512 | 4aea7e631e6a9e472c16aa51d5a820643c8405c9da63b99a9f0bc0f7399783a3ab24bab6f2320c0c11cbd849bf02ba9ecb5f6c78f596fd37459e6947c7f1dadf |
memory/3084-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3084-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3084-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3084-32-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3084-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3084-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3084-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3084-37-0x0000000000400000-0x0000000000537000-memory.dmp