Analysis
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max time kernel
35s -
max time network
32s -
platform
windows7_x64 -
resource
win7-20221111-es -
resource tags
arch:x64arch:x86image:win7-20221111-eslocale:es-esos:windows7-x64systemwindows -
submitted
11/01/2023, 15:58
Static task
static1
Behavioral task
behavioral1
Sample
App.java
Resource
win7-20221111-es
windows7-x64
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
App.java
Resource
win10v2004-20221111-es
windows10-2004-x64
3 signatures
150 seconds
General
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Target
App.java
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Size
5KB
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MD5
7864957300204a51c450ac825c9acfeb
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SHA1
00760ad35c7d6d509c31d19edf78afd98b2605b8
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SHA256
88cbb0609a53ef38bd0320077b27598a219224d4a22febcb2aab37e18be1203a
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SHA512
b49ae0c6fcf3aa4e3a4daddffb0083e1a5ed385ce4ca19c5c5ab8d9c2d35a8350c10c55d8d61f625b6bb54a69ec48766a19d0b80583a3f0887a89529f9fb079d
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SSDEEP
96:9OeTYVnNr9MwWk/yZ0rCwPu0CfMs7cir8OVCKm5C9zisLCfJ+fCUUDDO:0y3wWLjcu8OVCh5C99LCIfCUUDDO
Score
3/10
Malware Config
Signatures
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies registry class 13 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\java_auto_file\shell\open\command rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\java_auto_file\shell\open\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_Classes\Local Settings rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\java_auto_file\shell\edit rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\java_auto_file\shell\edit\command rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\java_auto_file\shell\edit\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1" rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.java\ = "java_auto_file" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\java_auto_file\shell rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\java_auto_file\shell\open rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\java_auto_file rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\java_auto_file\ rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.java rundll32.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1020 NOTEPAD.EXE -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 1296 rundll32.exe -
Suspicious use of FindShellTrayWindow 64 IoCs
pid Process 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe 1296 rundll32.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 1272 wrote to memory of 1296 1272 cmd.exe 29 PID 1272 wrote to memory of 1296 1272 cmd.exe 29 PID 1272 wrote to memory of 1296 1272 cmd.exe 29 PID 1296 wrote to memory of 1020 1296 rundll32.exe 30 PID 1296 wrote to memory of 1020 1296 rundll32.exe 30 PID 1296 wrote to memory of 1020 1296 rundll32.exe 30
Processes
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C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\App.java1⤵
- Suspicious use of WriteProcessMemory
PID:1272 -
C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\App.java2⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1296 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\App.java3⤵
- Opens file in notepad (likely ransom note)
PID:1020
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