Analysis
- max time kernel
149s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
29/05/2026, 03:43
Behavioral task
behavioral1
Sample
ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe
Resource
win10v2004-20260513-en
windows10-2004-x64
10 signatures
150 seconds
General
- Target ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe
- Size 766KB
- Sample260529-eael8act9t
- SHA256 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c
- MD5 f41ffa8f7a9152fb4eecebc1037f570e
- SHA1 53129bb8ac2b5040ac0019b3b6ea4fe779c491fd
- SHA512 4842de39b98ab74bec8329cf1165d76f907a819567ae3c6951085d0eba2fe005f6aa6ae96186e9fb138b0ac2379cad2a1273148cb1ea377940991b87da88e174
- SSDEEP 12288:XSvO2x9mONvKRwLSFtsOkx2LIa+ya5FAQjU/Liw:ivO2xJKRw2kOkx2LFRvcUV
- TLSH T100F45A31E241C03AD0A74576C6FA0BAFE564BD25531155CBA3C43A6A2FB36D2BE3170E
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 4824 9acfd7da - Unexpected DNS network traffic destination 4 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
description flow ioc pid Process Destination IP 1 114.114.114.114 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe Destination IP 2 223.5.5.5 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe Destination IP 12 114.114.114.114 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe Destination IP 13 223.5.5.5 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe - Drops file in System32 directory 15 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\81B9B36F9ABC4DA631A4713EE66FAEC6_D78A39BE9A7C3823659C09F61E8BD3E8 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content 9acfd7da File created C:\Windows\SysWOW64\9acfd7da ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\66F835E41EC6A985EB9271E4A70169D7_CF44E3C99F7F4AC558EEB35244F7E046 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\81B9B36F9ABC4DA631A4713EE66FAEC6_D78A39BE9A7C3823659C09F61E8BD3E8 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 9acfd7da File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\66F835E41EC6A985EB9271E4A70169D7_CF44E3C99F7F4AC558EEB35244F7E046 9acfd7da -
resource yara_rule behavioral2/memory/3172-0-0x0000000000E90000-0x0000000000F1C000-memory.dmp upx behavioral2/files/0x002100000002b2d3-2.dat upx behavioral2/memory/4824-4-0x00000000002F0000-0x000000000037C000-memory.dmp upx behavioral2/memory/3172-18-0x0000000000E90000-0x0000000000F1C000-memory.dmp upx behavioral2/memory/4824-19-0x00000000002F0000-0x000000000037C000-memory.dmp upx behavioral2/memory/4824-30-0x00000000002F0000-0x000000000037C000-memory.dmp upx - Drops file in Windows directory 2 IoCs
description ioc Process File opened for modification C:\Windows\5296b0 9acfd7da File opened for modification C:\Windows\364e48 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe - System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 9acfd7da - Modifies data under HKEY_USERS 9 IoCs
description ioc Process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix 9acfd7da Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" 9acfd7da Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" 9acfd7da Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" 9acfd7da Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing 9acfd7da Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" 9acfd7da Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ 9acfd7da Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" 9acfd7da Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" 9acfd7da - Suspicious behavior: EnumeratesProcesses 14 IoCs
pid Process 4824 9acfd7da 4824 9acfd7da 4824 9acfd7da 4824 9acfd7da 4824 9acfd7da 4824 9acfd7da 4824 9acfd7da 4824 9acfd7da 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe - Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe Token: SeTcbPrivilege 3172 ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe Token: SeDebugPrivilege 4824 9acfd7da Token: SeTcbPrivilege 4824 9acfd7da
Processes
-
C:\Users\Admin\AppData\Local\Temp\ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe"C:\Users\Admin\AppData\Local\Temp\ef6e8fdd6f6cc86a249c1d469039648a72b00c2ad242b9f9721c3375afb98f9c.exe"1⤵
- Unexpected DNS network traffic destination
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3172
-
C:\Windows\Syswow64\9acfd7daC:\Windows\Syswow64\9acfd7da1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4824
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Windows\SysWOW64\9acfd7da
- Size 766KB
- SHA256 bf461fd2e0aa8b75070490aedb61f3af136652c3b02b84e09ceee2f9abb3719f
- MD5 d5b4e04aac416afc0e13fadc480506b8
- SHA1 01cb70b573c918d4dbbaa188bc7899d36277c688
- SHA512 284d26ce3b46722d058888d2e754d6725db77befbe0d2a26f27ed0164a8666f0dbc591c068dff64ecd7acc9e7d31bdc07e0464a188cc2fd4877efe342c640c10
- SSDEEP 12288:TSvO2x9mONvKRwLSFtsOkx2LIa+ya5FAQjU/Liw:mvO2xJKRw2kOkx2LFRvcUV
- TLSH T1E7F45A31E241C03AD0A74576C6FA0BAFE564BD25531155CBA3C43A6A2FB36D2BE3170E
- MD5 SHA1 SHA512 SSDEEP TLSH