Analysis
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max time kernel
147s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
28-11-2022 03:44
Static task
static1
Behavioral task
behavioral1
Sample
b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe
Resource
win10v2004-20220901-en
General
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Target
b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe
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Size
630KB
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MD5
9662f36fb3bcd1ad2614a8c00915db6c
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SHA1
a890da3e998872f7235c163e1351619267066433
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SHA256
b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad
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SHA512
412b0783618b7e0a3c1671f07b301465b052cc809d8c7d18bf9b9cd0492c4b13937bc5038a746444a467ebd99a0de8d1e6897f96e71fe3fe5d05c9e664cea225
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SSDEEP
12288:NKHO5cPTJlu3NOuCxV67lbMAGUyxHSoeZwLyai/WjXHMObw4D:NaOsWQ7IlgdHSoeZHWjXMW
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 Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ubyjlsap = "\"C:\\Windows\\yjucilys.exe\"" explorer.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run explorer.exe -
Processes:
b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exeb1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exedescription pid process target process PID 5016 set thread context of 1708 5016 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe PID 1708 set thread context of 724 1708 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe explorer.exe -
Drops file in Windows directory 2 IoCs
Processes:
explorer.exedescription ioc process File opened for modification C:\Windows\yjucilys.exe explorer.exe File created C:\Windows\yjucilys.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 2292 vssadmin.exe -
Modifies Internet Explorer Phishing Filter 1 TTPs 3 IoCs
Processes:
explorer.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\PhishingFilter explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0" explorer.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
vssvc.exedescription pid process Token: SeBackupPrivilege 1488 vssvc.exe Token: SeRestorePrivilege 1488 vssvc.exe Token: SeAuditPrivilege 1488 vssvc.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exeb1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exeexplorer.exedescription pid process target process PID 5016 wrote to memory of 1708 5016 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe PID 5016 wrote to memory of 1708 5016 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe PID 5016 wrote to memory of 1708 5016 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe PID 5016 wrote to memory of 1708 5016 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe PID 5016 wrote to memory of 1708 5016 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe PID 1708 wrote to memory of 724 1708 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe explorer.exe PID 1708 wrote to memory of 724 1708 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe explorer.exe PID 1708 wrote to memory of 724 1708 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe explorer.exe PID 1708 wrote to memory of 724 1708 b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe explorer.exe PID 724 wrote to memory of 2292 724 explorer.exe vssadmin.exe PID 724 wrote to memory of 2292 724 explorer.exe vssadmin.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe"C:\Users\Admin\AppData\Local\Temp\b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.exe"C:\Users\Admin\AppData\Local\Temp\b1c4460b9967985862e8998c1cceba8424f023c0eb5ca6163d7b9b54b41f38ad.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\ypevoziqagevidih\01000000Filesize
630KB
MD507f873c14772278719d0d19bbcc31893
SHA16936d55b9fbc985d2e5fceebe20e977d165755e8
SHA256f3aa1b77333bfaa3a65376c1c0e25ca4868027b63bb1ef578ad8436590d35655
SHA512baf6394093102feb1c15706a1ab59521bed8a70838b90ffd351762fbd2b73fb18f2b3730342aaf97b1fb2f66f73dc51eaba81fa3f1e2ef5a3a6ba27a658abeef
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memory/724-137-0x0000000000000000-mapping.dmp
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memory/724-138-0x00000000005C0000-0x00000000005FC000-memory.dmpFilesize
240KB
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memory/724-143-0x00000000005C0000-0x00000000005FC000-memory.dmpFilesize
240KB
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memory/1708-132-0x0000000000000000-mapping.dmp
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memory/1708-133-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1708-134-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1708-135-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1708-141-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/2292-142-0x0000000000000000-mapping.dmp
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memory/5016-136-0x0000000000590000-0x0000000000597000-memory.dmpFilesize
28KB