Analysis Overview
SHA256
25fee0d9c2bf841ad0c0271a34e450d2a82dcc91d6fd7c669b9882fc436e06ea
Threat Level: Known bad
The file 2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop was found to be: Known bad.
Malicious Activity Summary
Detected Djvu ransomware
Djvu Ransomware
Djvu family
Checks computer location settings
Executes dropped EXE
Modifies file permissions
Adds Run key to start application
Looks up external IP address via web service
Unsigned PE
System Location Discovery: System Language Discovery
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-09-04 03:46
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Djvu family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-09-04 03:46
Reported
2024-09-04 03:48
Platform
win7-20240729-en
Max time kernel
143s
Max time network
145s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Djvu Ransomware
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\0fccf1fe-7ff7-4834-b342-5859158bc247\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0fccf1fe-7ff7-4834-b342-5859158bc247\\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.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 |
| N/A | api.2ip.ua | N/A | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\icacls.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\0fccf1fe-7ff7-4834-b342-5859158bc247\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\0fccf1fe-7ff7-4834-b342-5859158bc247" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe" --Admin IsNotAutoStart IsNotTask
C:\Windows\system32\taskeng.exe
taskeng.exe {AA69A64B-C6AC-473E-9FB8-12321A329E32} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
C:\Users\Admin\AppData\Local\0fccf1fe-7ff7-4834-b342-5859158bc247\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
C:\Users\Admin\AppData\Local\0fccf1fe-7ff7-4834-b342-5859158bc247\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe --Task
Network
| Country | Destination | Domain | Proto |
| 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 | c.pki.goog | udp |
| GB | 216.58.201.99:80 | c.pki.goog | tcp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | vrta.top | udp |
| US | 8.8.8.8:53 | www.microsoft.com | udp |
| GB | 95.100.245.144:80 | www.microsoft.com | tcp |
| US | 104.21.65.24:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | www.microsoft.com | udp |
Files
C:\Users\Admin\AppData\Local\0fccf1fe-7ff7-4834-b342-5859158bc247\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
| MD5 | 591b5afb1f701910bb6b2a95e83b9f15 |
| SHA1 | f3c0a74e0c38e75ec86195c83244831ae21cde58 |
| SHA256 | 25fee0d9c2bf841ad0c0271a34e450d2a82dcc91d6fd7c669b9882fc436e06ea |
| SHA512 | a66af28164683d16522e4c2a446ccaf1c9f64cbd743747c25359a2dc31e011683c1e852a829361ec61b9cdd7479114823fb684e28c7fa8754fd173f3c9b1f4ea |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
| MD5 | 7fb5fa1534dcf77f2125b2403b30a0ee |
| SHA1 | 365d96812a69ac0a4611ea4b70a3f306576cc3ea |
| SHA256 | 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f |
| SHA512 | a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
| MD5 | 38abad8036e71ed42d84870b2e4bd4a0 |
| SHA1 | b91e1c0f4214bedff0ac31f94290ce90c91e5537 |
| SHA256 | 1d94765d6f9417f5f69b9ebb8a16628b5778259a93ee017d039cb10af5cdae7f |
| SHA512 | 11f5c204baf4154f3b945f947996ee6b437d3195ca52852127ceaa175a28cee9b49e62e35011c8bc631f495222791a61c1e4ae5a73d9e847d6978fcbbe024775 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
| MD5 | 971c514f84bba0785f80aa1c23edfd79 |
| SHA1 | 732acea710a87530c6b08ecdf32a110d254a54c8 |
| SHA256 | f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895 |
| SHA512 | 43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
| MD5 | d0aca34d6b1193cc9fc178f329f9e47c |
| SHA1 | 08e10159b2fb45ee73ba1c49c81c27c75627f3e8 |
| SHA256 | 036559b9513f0b05daba304895b91e13dde083ca719f8f23a945fd46728a45ef |
| SHA512 | e06991dd9919c56875a56dc2ccdd6f7151817a0719277db402fd8c669841f5918749b5d8151336fbd25dc3d490565ccf0c0db9b9682857134915e6f3a05ffff2 |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
| MD5 | dc7d1c37e6f5e410d648a34a9ed64c49 |
| SHA1 | adcad5fc01c17e6a71c3a1bbae58f476f913b382 |
| SHA256 | d48e2e7a5fbf2335b5f379c6553b4ec73302df8389b6c4f1b29d251e97958935 |
| SHA512 | 9588add20c5bfec3349df23436d09e60c420d571280a0a83925574231192d52d59f9a9f0cce3d4170a5cfef9e89c4c0bfaeba118e1db7121b48470f5f367c95a |
C:\Users\Admin\AppData\Local\Temp\Cab2A7A.tmp
| MD5 | 49aebf8cbd62d92ac215b2923fb1b9f5 |
| SHA1 | 1723be06719828dda65ad804298d0431f6aff976 |
| SHA256 | b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f |
| SHA512 | bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b |
C:\Users\Admin\AppData\Local\Temp\Tar5504.tmp
| MD5 | 4ea6026cf93ec6338144661bf1202cd1 |
| SHA1 | a1dec9044f750ad887935a01430bf49322fbdcb7 |
| SHA256 | 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8 |
| SHA512 | 6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b |
Analysis: behavioral2
Detonation Overview
Submitted
2024-09-04 03:46
Reported
2024-09-04 03:48
Platform
win10v2004-20240802-en
Max time kernel
143s
Max time network
144s
Command Line
Signatures
Detected Djvu ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Djvu Ransomware
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\4d899bc8-cc10-43f3-8527-8f72f76eca21\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.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-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4d899bc8-cc10-43f3-8527-8f72f76eca21\\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe\" --AutoStart" | C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.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 |
| N/A | api.2ip.ua | N/A | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\icacls.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\4d899bc8-cc10-43f3-8527-8f72f76eca21\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe"
C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\4d899bc8-cc10-43f3-8527-8f72f76eca21" /deny *S-1-1-0:(OI)(CI)(DE,DC)
C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe" --Admin IsNotAutoStart IsNotTask
C:\Users\Admin\AppData\Local\4d899bc8-cc10-43f3-8527-8f72f76eca21\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
C:\Users\Admin\AppData\Local\4d899bc8-cc10-43f3-8527-8f72f76eca21\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe --Task
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 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | c.pki.goog | udp |
| GB | 216.58.201.99:80 | c.pki.goog | tcp |
| US | 8.8.8.8:53 | 220.139.67.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 81.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 99.201.58.216.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 71.31.126.40.in-addr.arpa | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
| US | 8.8.8.8:53 | vrta.top | udp |
| US | 8.8.8.8:53 | vrta.top | udp |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | vrta.top | udp |
| US | 8.8.8.8:53 | vrta.top | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 65.139.73.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 30.243.111.52.in-addr.arpa | udp |
| US | 172.67.139.220:443 | api.2ip.ua | tcp |
Files
C:\Users\Admin\AppData\Local\4d899bc8-cc10-43f3-8527-8f72f76eca21\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
| MD5 | 591b5afb1f701910bb6b2a95e83b9f15 |
| SHA1 | f3c0a74e0c38e75ec86195c83244831ae21cde58 |
| SHA256 | 25fee0d9c2bf841ad0c0271a34e450d2a82dcc91d6fd7c669b9882fc436e06ea |
| SHA512 | a66af28164683d16522e4c2a446ccaf1c9f64cbd743747c25359a2dc31e011683c1e852a829361ec61b9cdd7479114823fb684e28c7fa8754fd173f3c9b1f4ea |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
| MD5 | cd5e54c2dc03872f26017df0bbd69b34 |
| SHA1 | ea95e80df7047b31414738f20a144f4382706014 |
| SHA256 | fb7399f57f0bd4c6edb725a5ad33994ddf6c8a77f6b0bd420637fc0772271f59 |
| SHA512 | 116d3c1f0580df3ec2c31e9f90a111b052b629db6168a46b535787240103da5cd1904c608510bdd79962297f88341b89448c102510828c7085f2817932b82dce |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
| MD5 | 7fb5fa1534dcf77f2125b2403b30a0ee |
| SHA1 | 365d96812a69ac0a4611ea4b70a3f306576cc3ea |
| SHA256 | 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f |
| SHA512 | a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
| MD5 | 6e4d5db4870b7ee13728002756519842 |
| SHA1 | c04560efef518d6141b06a6227869d099dba2e87 |
| SHA256 | c05782e5f4389aefc89dbed53bf093fd72b14bd046e7271afcc0653a7b3823b7 |
| SHA512 | cedc9d3fd6a323ab23d786c96fc90c98aec460e90291271f61fb80873c39e52de1194c218101db3af873db6ad278348aa0f85e8b9b91a3b3c4f9f6d481166d7b |
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
| MD5 | 971c514f84bba0785f80aa1c23edfd79 |
| SHA1 | 732acea710a87530c6b08ecdf32a110d254a54c8 |
| SHA256 | f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895 |
| SHA512 | 43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58 |