Analysis
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max time kernel
173s -
max time network
176s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
28-11-2022 03:31
Static task
static1
Behavioral task
behavioral1
Sample
52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe
Resource
win10v2004-20220812-en
General
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Target
52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe
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Size
740KB
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MD5
0df48f8ca20443a9f260def3c32b9770
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SHA1
81193d5873c7b291b7c0e24c459c40fd648ed68a
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SHA256
52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e
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SHA512
b7e898ccd5cf3a8549a3e5aabbc53117174ea50f3c1d878bacb610f101b76fdca39b51e370600ee8e14379aef98415719d5af4164ef9b18afff7a1684adb85a4
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SSDEEP
12288:iep8fcP7cG9CZmSqKd89MP70IKViOvYeHSo+6XWnEzUYjD9a:H8qbfwd8WP4bVLvHHSo+IWk1a
Malware Config
Signatures
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Adds Run key to start application 2 TTPs 2 IoCs
Processes:
explorer.exedescription ioc process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run explorer.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ydcjikin = "\"C:\\Windows\\aribusyn.exe\"" explorer.exe -
Processes:
52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exedescription pid process target process PID 1364 set thread context of 4828 1364 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe PID 4828 set thread context of 4804 4828 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe explorer.exe -
Drops file in Windows directory 2 IoCs
Processes:
explorer.exedescription ioc process File created C:\Windows\aribusyn.exe explorer.exe File opened for modification C:\Windows\aribusyn.exe explorer.exe -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
Processes:
vssadmin.exepid process 4692 vssadmin.exe -
Modifies Internet Explorer Phishing Filter 1 TTPs 3 IoCs
Processes:
explorer.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Internet Explorer\PhishingFilter explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0" explorer.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
vssvc.exedescription pid process Token: SeBackupPrivilege 4704 vssvc.exe Token: SeRestorePrivilege 4704 vssvc.exe Token: SeAuditPrivilege 4704 vssvc.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exeexplorer.exedescription pid process target process PID 1364 wrote to memory of 4828 1364 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe PID 1364 wrote to memory of 4828 1364 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe PID 1364 wrote to memory of 4828 1364 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe PID 1364 wrote to memory of 4828 1364 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe PID 1364 wrote to memory of 4828 1364 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe PID 4828 wrote to memory of 4804 4828 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe explorer.exe PID 4828 wrote to memory of 4804 4828 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe explorer.exe PID 4828 wrote to memory of 4804 4828 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe explorer.exe PID 4828 wrote to memory of 4804 4828 52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe explorer.exe PID 4804 wrote to memory of 4692 4804 explorer.exe vssadmin.exe PID 4804 wrote to memory of 4692 4804 explorer.exe vssadmin.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe"C:\Users\Admin\AppData\Local\Temp\52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe"C:\Users\Admin\AppData\Local\Temp\52a6d5e35047fa5c952bad7469706ef0f0dff4658abe73eb5563eb704ce8568e.exe"2⤵
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\explorer.exe"C:\Windows\system32\explorer.exe"3⤵
- Adds Run key to start application
- Drops file in Windows directory
- Modifies Internet Explorer Phishing Filter
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet4⤵
- Interacts with shadow copies
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\ProgramData\idumewitynofyran\01000000Filesize
740KB
MD5b2c4cd167a02c8807b545524eaf0224e
SHA12a47ef168270a74105a961f8eea56c0b792116b3
SHA256632d36f3caab286cef4de92bd34459d1c99f81f422148fb7991fb5618de53e8e
SHA5128c5dd9d668835c4d84043054823073d196d65686d78c100638a1da403243b56aecb09c764ae839a39c6dd673fda58e17818e91aba0c7bf662bbbd5c67f755283
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memory/1364-137-0x00000000005A0000-0x00000000005A8000-memory.dmpFilesize
32KB
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memory/4692-144-0x0000000000000000-mapping.dmp
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memory/4804-138-0x0000000000000000-mapping.dmp
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memory/4804-139-0x0000000000610000-0x000000000064C000-memory.dmpFilesize
240KB
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memory/4804-145-0x0000000000610000-0x000000000064C000-memory.dmpFilesize
240KB
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memory/4828-133-0x0000000000000000-mapping.dmp
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memory/4828-134-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/4828-135-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/4828-136-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/4828-141-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/4828-143-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB