Analysis
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max time kernel
258s -
max time network
341s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
28-11-2022 03:15
Static task
static1
Behavioral task
behavioral1
Sample
239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe
Resource
win10v2004-20220901-en
General
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Target
239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe
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Size
740KB
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MD5
af0581cc9f5d885911af35789f7d7fae
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SHA1
f02bb8043c3a5fce7a15798af18b5fa8a2192ecd
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SHA256
239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc
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SHA512
e058664567dc37379c3bcc165cc0c43303e139462ede0d54858ae24476ad0fda8454b635ba4053dcdabdf4f7c0f5fac416add6b8f10755e4834650236380698f
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SSDEEP
12288:Vsp8fcP7cG9CZmSqKd89MP70IKV07HSo+qyQAO9IJLY3CZ/f:i8qbfwd8WP4bVgHSo+qLd92LFn
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\elszygik = "\"C:\\Windows\\itowyxag.exe\"" explorer.exe -
Processes:
239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exedescription pid process target process PID 876 set thread context of 520 876 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe PID 520 set thread context of 676 520 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe explorer.exe -
Drops file in Windows directory 2 IoCs
Processes:
explorer.exedescription ioc process File opened for modification C:\Windows\itowyxag.exe explorer.exe File created C:\Windows\itowyxag.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 1776 vssadmin.exe -
Modifies Internet Explorer Phishing Filter 1 TTPs 3 IoCs
Processes:
explorer.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\PhishingFilter explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0" explorer.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
vssvc.exedescription pid process Token: SeBackupPrivilege 284 vssvc.exe Token: SeRestorePrivilege 284 vssvc.exe Token: SeAuditPrivilege 284 vssvc.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exeexplorer.exedescription pid process target process PID 876 wrote to memory of 520 876 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe PID 876 wrote to memory of 520 876 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe PID 876 wrote to memory of 520 876 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe PID 876 wrote to memory of 520 876 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe PID 876 wrote to memory of 520 876 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe PID 876 wrote to memory of 520 876 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe PID 520 wrote to memory of 676 520 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe explorer.exe PID 520 wrote to memory of 676 520 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe explorer.exe PID 520 wrote to memory of 676 520 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe explorer.exe PID 520 wrote to memory of 676 520 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe explorer.exe PID 520 wrote to memory of 676 520 239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe explorer.exe PID 676 wrote to memory of 1776 676 explorer.exe vssadmin.exe PID 676 wrote to memory of 1776 676 explorer.exe vssadmin.exe PID 676 wrote to memory of 1776 676 explorer.exe vssadmin.exe PID 676 wrote to memory of 1776 676 explorer.exe vssadmin.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe"C:\Users\Admin\AppData\Local\Temp\239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.exe"C:\Users\Admin\AppData\Local\Temp\239f1c7708f8d05c6860008b982bb446c5d54dc917c9dea2b6ae78589e072afc.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\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
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Downloads
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C:\ProgramData\idumewitynofyran\01000000Filesize
740KB
MD5261d781551cbc31b3161a145bd936d93
SHA1daf867d5061db9ddf058c354dc17154544b6040c
SHA256615e0d5c9b4ec289dfc2e6659e845c9a3ecca0013036d5f75ec05b81ba7d0fb3
SHA512fa82ca8bf54e4eac864a78340648bc4259c846c18b00952691c2b2a1a154bf6c08dcd5ae48b00a21daeadc7f1da8e1a9791dc8c71f4ef76399969fb95e77fd40
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memory/520-60-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/520-72-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/520-58-0x000000000040A61E-mapping.dmp
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memory/520-55-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/520-62-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/520-63-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/676-68-0x00000000000DA140-mapping.dmp
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memory/676-64-0x00000000000C0000-0x00000000000FC000-memory.dmpFilesize
240KB
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memory/676-70-0x0000000074F51000-0x0000000074F53000-memory.dmpFilesize
8KB
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memory/676-66-0x00000000000C0000-0x00000000000FC000-memory.dmpFilesize
240KB
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memory/676-73-0x00000000000C0000-0x00000000000FC000-memory.dmpFilesize
240KB
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memory/676-75-0x0000000072BA1000-0x0000000072BA3000-memory.dmpFilesize
8KB
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memory/876-59-0x0000000000260000-0x0000000000268000-memory.dmpFilesize
32KB
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memory/876-54-0x0000000076771000-0x0000000076773000-memory.dmpFilesize
8KB
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memory/1776-74-0x0000000000000000-mapping.dmp