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Analysis
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max time kernel
36s -
max time network
42s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
05/12/2022, 15:34
Static task
static1
Behavioral task
behavioral1
Sample
21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186.dll
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186.dll
Resource
win10v2004-20221111-en
General
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Target
21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186.dll
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Size
237KB
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MD5
3d801aca03997af3be614461a69b21e0
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SHA1
aef9baed56172d6afe45045ff8f546d46ae5d0df
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SHA256
21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186
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SHA512
91133765b856c3e7c3aab8d0d52a8581ed5459ea8ae7a17ab71b0dad23aea4ffbe3dab36e271b46cfb4f825bbf457399416f137baf73e27eab84d94c2faf81ad
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SSDEEP
1536:ah3I3Y/OmZWgu8ghI8ANLPc6JTLxvolgBwjhIHOiAwKhgOeS/5/IhnGcG7wkIZ:ah3PDghILPcAvoawjXbwPSx/Iuwk8
Malware Config
Signatures
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Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\wyhuf = "{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}" rundll32.exe -
Loads dropped DLL 2 IoCs
pid Process 1968 rundll32.exe 1968 rundll32.exe -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\SysWOW64\jluhs.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\jluhs.dll rundll32.exe File created C:\Windows\SysWOW64\vxgte.dll rundll32.exe File created C:\Windows\SysWOW64\rtcpa.dll rundll32.exe -
Modifies registry class 5 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}\ rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}\InprocServer32 rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}\InprocServer32\ = "C:\\Windows\\SysWow64\\rtcpa.dll" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}\InprocServer32\ThreadingModel = "Apartment" rundll32.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1968 rundll32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 2000 wrote to memory of 1968 2000 rundll32.exe 26 PID 2000 wrote to memory of 1968 2000 rundll32.exe 26 PID 2000 wrote to memory of 1968 2000 rundll32.exe 26 PID 2000 wrote to memory of 1968 2000 rundll32.exe 26 PID 2000 wrote to memory of 1968 2000 rundll32.exe 26 PID 2000 wrote to memory of 1968 2000 rundll32.exe 26 PID 2000 wrote to memory of 1968 2000 rundll32.exe 26
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2000 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186.dll,#12⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:1968
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
625KB
MD595e2376b3323f062eb562b8586d0f14a
SHA1453d4c3bf4a489433b593420a37bbffb7749875a
SHA256bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017
SHA512b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d
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Filesize
1.1MB
MD59b98d47916ead4f69ef51b56b0c2323c
SHA1290a80b4ded0efc0fd00816f373fcea81a521330
SHA25696e0ae104c9662d0d20fdf59844c2d18334e5847b6c4fc7f8ce4b3b87f39887b
SHA51268b67021f228d8d71df4deb0b6388558b2f935a6aa466a12199cd37ada47ee588ea407b278d190d3a498b0ef3f5f1a2573a469b7ea5561ab2e7055c45565fe94