Analysis
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max time kernel
151s -
max time network
163s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
28-11-2022 07:55
Static task
static1
Behavioral task
behavioral1
Sample
f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe
Resource
win10v2004-20220812-en
General
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Target
f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe
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Size
469KB
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MD5
362479f2bf81adb0231c5d608ddae80d
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SHA1
efc926d62a7350349a62d85bb45d206054497be7
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SHA256
f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208
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SHA512
df5f14976ba3fb0d40ed8cfdc96f0b9f0520f1138f9143f12af275607f16b4b42e51108aff01fad234615fdf949c1c548b2813e39e4cc06634ee68e9eb8a7b5d
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SSDEEP
6144:bi0LrqaFy7EZK2P1QTcyPa8v1v36WuRty0B/pBcbrWu:b3v3I78DMVB6VxhSPWu
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\yprparun = "C:\\Windows\\evynixyf.exe" explorer.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run explorer.exe -
Processes:
f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exef3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exedescription pid process target process PID 1604 set thread context of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 996 set thread context of 1724 996 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe explorer.exe -
Drops file in Windows directory 2 IoCs
Processes:
explorer.exedescription ioc process File opened for modification C:\Windows\evynixyf.exe explorer.exe File created C:\Windows\evynixyf.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 1944 vssadmin.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
vssvc.exedescription pid process Token: SeBackupPrivilege 268 vssvc.exe Token: SeRestorePrivilege 268 vssvc.exe Token: SeAuditPrivilege 268 vssvc.exe -
Suspicious use of WriteProcessMemory 19 IoCs
Processes:
f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exef3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exeexplorer.exedescription pid process target process PID 1604 wrote to memory of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 1604 wrote to memory of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 1604 wrote to memory of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 1604 wrote to memory of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 1604 wrote to memory of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 1604 wrote to memory of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 1604 wrote to memory of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 1604 wrote to memory of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 1604 wrote to memory of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 1604 wrote to memory of 996 1604 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe PID 996 wrote to memory of 1724 996 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe explorer.exe PID 996 wrote to memory of 1724 996 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe explorer.exe PID 996 wrote to memory of 1724 996 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe explorer.exe PID 996 wrote to memory of 1724 996 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe explorer.exe PID 996 wrote to memory of 1724 996 f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe explorer.exe PID 1724 wrote to memory of 1944 1724 explorer.exe vssadmin.exe PID 1724 wrote to memory of 1944 1724 explorer.exe vssadmin.exe PID 1724 wrote to memory of 1944 1724 explorer.exe vssadmin.exe PID 1724 wrote to memory of 1944 1724 explorer.exe vssadmin.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe"C:\Users\Admin\AppData\Local\Temp\f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe"C:\Users\Admin\AppData\Local\Temp\f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.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
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\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
Loading Replay Monitor...
Downloads
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C:\ProgramData\exasugosujahikov\01000000Filesize
469KB
MD5ecb344be61a94f203c51dc86a4cf673b
SHA153d9f879889693e4f2d182a5e047d25be8444716
SHA2563bd865c71516ba04f6e583cf8e8aa35911a083e4ff39a0f769f78c156d5893d3
SHA512ca2cc0120706c9264e2dede65c77720374b06ff9e037a97ec15baeaf85b6e9f930f8a6370108e91b16c79245be105597fd7817c3fd706230b1b8f8742cbb9bfc
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memory/996-66-0x0000000000400000-0x0000000000439000-memory.dmpFilesize
228KB
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memory/996-60-0x0000000000400000-0x0000000000439000-memory.dmpFilesize
228KB
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memory/996-68-0x0000000000400000-0x0000000000439000-memory.dmpFilesize
228KB
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memory/996-55-0x0000000000400000-0x0000000000439000-memory.dmpFilesize
228KB
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memory/996-62-0x0000000000400000-0x0000000000439000-memory.dmpFilesize
228KB
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memory/996-65-0x000000000040A7BE-mapping.dmp
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memory/996-64-0x0000000000400000-0x0000000000439000-memory.dmpFilesize
228KB
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memory/996-77-0x0000000000400000-0x0000000000439000-memory.dmpFilesize
228KB
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memory/996-61-0x0000000000400000-0x0000000000439000-memory.dmpFilesize
228KB
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memory/996-58-0x0000000000400000-0x0000000000439000-memory.dmpFilesize
228KB
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memory/1604-54-0x0000000076DC1000-0x0000000076DC3000-memory.dmpFilesize
8KB
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memory/1724-80-0x00000000000D0000-0x000000000010B000-memory.dmpFilesize
236KB
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memory/1724-73-0x00000000000E9C80-mapping.dmp
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memory/1724-75-0x0000000075591000-0x0000000075593000-memory.dmpFilesize
8KB
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memory/1724-71-0x00000000000D0000-0x000000000010B000-memory.dmpFilesize
236KB
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memory/1724-79-0x0000000073041000-0x0000000073043000-memory.dmpFilesize
8KB
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memory/1724-69-0x00000000000D0000-0x000000000010B000-memory.dmpFilesize
236KB
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memory/1944-78-0x0000000000000000-mapping.dmp