Analysis
- max time kernel
149s - max time network
152s - 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, 04:06
Behavioral task
behavioral1
Sample
81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe
Resource
win10v2004-20260513-en
windows10-2004-x64
9 signatures
150 seconds
General
- Target 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe
- Size 560KB
- Sample260529-epe7ascx5y
- SHA256 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a
- MD5 1ddd62342a66755ea317ffa664ba7efa
- SHA1 bdba6efd4a6e91afdbf76bdf4dbf5d8ea6f3fa69
- SHA512 ba154906497c518c62fbb104c9d629bca98181e55e5295b8b3114986312a3fbdfbc87a43bb9c9b390d33b191dbcd261a5da7ba3b91582872ae22c0a9ce01a8e3
- SSDEEP 6144:9gye71cE4poJTqvpQLXNKFyLWD1nFairGcEOkCybEaQRuy8K:9I7OE4kopQzNKFyLWDHsOkxHy
- TLSH T1CCC48C2AB690C076C4B7D534C5E197AAEAB17432372449CFA3D0075A1F237E2BA3570E
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 4764 75166150 - 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 12 114.114.114.114 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe Destination IP 13 223.5.5.5 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe Destination IP 1 114.114.114.114 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe Destination IP 2 223.5.5.5 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe - Drops file in System32 directory 15 IoCs
description ioc Process File created C:\Windows\SysWOW64\75166150 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\66F835E41EC6A985EB9271E4A70169D7_CF44E3C99F7F4AC558EEB35244F7E046 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\81B9B36F9ABC4DA631A4713EE66FAEC6_D78A39BE9A7C3823659C09F61E8BD3E8 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\81B9B36F9ABC4DA631A4713EE66FAEC6_D78A39BE9A7C3823659C09F61E8BD3E8 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\66F835E41EC6A985EB9271E4A70169D7_CF44E3C99F7F4AC558EEB35244F7E046 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content 75166150 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 75166150 -
resource yara_rule behavioral2/memory/4576-0-0x00000000002B0000-0x000000000033C000-memory.dmp upx behavioral2/files/0x000900000002a025-2.dat upx behavioral2/memory/4764-4-0x0000000000510000-0x000000000059C000-memory.dmp upx behavioral2/memory/4576-18-0x00000000002B0000-0x000000000033C000-memory.dmp upx behavioral2/memory/4764-19-0x0000000000510000-0x000000000059C000-memory.dmp upx behavioral2/memory/4764-32-0x0000000000510000-0x000000000059C000-memory.dmp upx - Drops file in Windows directory 2 IoCs
description ioc Process File opened for modification C:\Windows\4e57c0 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe File opened for modification C:\Windows\518fb8 75166150 - 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 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 75166150 - 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 75166150 Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" 75166150 Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" 75166150 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" 75166150 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" 75166150 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" 75166150 Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing 75166150 Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ 75166150 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" 75166150 - Suspicious behavior: EnumeratesProcesses 14 IoCs
pid Process 4764 75166150 4764 75166150 4764 75166150 4764 75166150 4764 75166150 4764 75166150 4764 75166150 4764 75166150 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe - Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe Token: SeTcbPrivilege 4576 81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe Token: SeDebugPrivilege 4764 75166150 Token: SeTcbPrivilege 4764 75166150
Processes
-
C:\Users\Admin\AppData\Local\Temp\81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.exe"C:\Users\Admin\AppData\Local\Temp\81fbbb4c01981d06b65d7d00f982f9d964ac0eab4dd606c1914c5812d7dadf1a.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:4576
-
C:\Windows\Syswow64\75166150C:\Windows\Syswow64\751661501⤵
- 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:4764
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Windows\SysWOW64\75166150
- Size 560KB
- SHA256 c7f5880a629d78fa2d65d08ee2772bec3a80bc5495d232588fda31a35878fb72
- MD5 267a0abcf25a75f6330ec71fdd8bea37
- SHA1 c1d6e0023fa799205fd5e1df72d4131baeecd101
- SHA512 176ca74b96eb84ea3a62b4262bd1d9b0c984b89d4b7204f46f8521c4914c600fe91797053ab7c780ed19c3962916196045ce41d28124f6f19938a1d8e82967fc
- SSDEEP 6144:Ggye71cE4poJTqvpQLXNKFyLWD1nFairGcEOkCybEaQRuy8K:GI7OE4kopQzNKFyLWDHsOkxHy
- TLSH T14DC48C2AB690D076C4B7D534C5E197AAEAB17432372449CFA3D0075A1F237E2BA3570E
- MD5 SHA1 SHA512 SSDEEP TLSH