Analysis
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max time kernel
296s -
max time network
288s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
25-07-2024 22:37
Static task
static1
Behavioral task
behavioral1
Sample
4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
Resource
win10-20240404-en
General
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Target
4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
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Size
837KB
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MD5
b3757b09ed2150ce857f446c0c61363c
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SHA1
04536100a4a8fc27dde91e006f4e2ea6b398b65e
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SHA256
4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981
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SHA512
c7fb0efb95a96177bcbc50a60f2d900f4f7328a0a98a64ead6fc6e00f52502c904815e1e0a8b309a764c77db1fa65a8e5da5104593e0d987fb6bf3f794a82119
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SSDEEP
24576:c3eL/rX2Ev8KDHwSPxDwauHfz/eicEeb+8TYLL:NLz7x7PP+H7e0YfT4
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.watz
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offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
- payload_url
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ransomnote
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Signatures
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Detected Djvu ransomware 14 IoCs
Processes:
resource yara_rule behavioral2/memory/4240-4-0x0000000003E50000-0x0000000003F6B000-memory.dmp family_djvu behavioral2/memory/3464-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3464-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3464-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3464-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3464-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3788-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3788-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3788-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3788-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3788-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3788-39-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3788-40-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3788-41-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-160447019-1232603106-4168707212-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f2ccf0de-7245-4a27-a99f-afceac4d4a28\\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe\" --AutoStart" 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 1 api.2ip.ua 2 api.2ip.ua 10 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exedescription pid process target process PID 4240 set thread context of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 set thread context of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exeicacls.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language icacls.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exepid process 3464 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 3464 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 3788 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 3788 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exedescription pid process target process PID 4240 wrote to memory of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 4240 wrote to memory of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 4240 wrote to memory of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 4240 wrote to memory of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 4240 wrote to memory of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 4240 wrote to memory of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 4240 wrote to memory of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 4240 wrote to memory of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 4240 wrote to memory of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 4240 wrote to memory of 3464 4240 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 3464 wrote to memory of 4408 3464 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe icacls.exe PID 3464 wrote to memory of 4408 3464 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe icacls.exe PID 3464 wrote to memory of 4408 3464 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe icacls.exe PID 3464 wrote to memory of 2688 3464 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 3464 wrote to memory of 2688 3464 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 3464 wrote to memory of 2688 3464 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 wrote to memory of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 wrote to memory of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 wrote to memory of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 wrote to memory of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 wrote to memory of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 wrote to memory of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 wrote to memory of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 wrote to memory of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 wrote to memory of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe PID 2688 wrote to memory of 3788 2688 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe 4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe"C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4240 -
C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe"C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe"2⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3464 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\f2ccf0de-7245-4a27-a99f-afceac4d4a28" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
PID:4408 -
C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe"C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2688 -
C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe"C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe" --Admin IsNotAutoStart IsNotTask4⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:3788
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1KB
MD57fb5fa1534dcf77f2125b2403b30a0ee
SHA1365d96812a69ac0a4611ea4b70a3f306576cc3ea
SHA25633a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
SHA512a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e
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Filesize
436B
MD5971c514f84bba0785f80aa1c23edfd79
SHA1732acea710a87530c6b08ecdf32a110d254a54c8
SHA256f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
SHA51243dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Filesize174B
MD55456a83df563781e04f940facaa038e8
SHA1fb275af32044a0bf61bdc381ae47e7d777c8b303
SHA256d370cc7b51844c44d6192012fa6fc34f022100f25cf16ae0460db1ed7dc91545
SHA5121415a659826083294b2fed0cabdec135b7a89308770af49503cd4643fc4d3eba14aacd84844827d1829cc7260376c06ae67d7b6b593e1c7e0f0da0fca444c547
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Filesize170B
MD5501b5a515677853c92274a69169155dd
SHA1645181b0ea1c1ca2c224906384e2a2a20dcee1f1
SHA256b4a66874acc1ed1596d61780ec89de4c42029f2f9142faed51e929573aa2d9f7
SHA512a535a176fb5986f17a625484482da7aa24087c241a47d94655fa4fbc725e754632590419f52f2a3c6ee34e63c2bd391e3201a0caaf362ff5ae332e60e45fda44
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C:\Users\Admin\AppData\Local\f2ccf0de-7245-4a27-a99f-afceac4d4a28\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
Filesize837KB
MD5b3757b09ed2150ce857f446c0c61363c
SHA104536100a4a8fc27dde91e006f4e2ea6b398b65e
SHA2564bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981
SHA512c7fb0efb95a96177bcbc50a60f2d900f4f7328a0a98a64ead6fc6e00f52502c904815e1e0a8b309a764c77db1fa65a8e5da5104593e0d987fb6bf3f794a82119