Analysis
- max time kernel
148s - max time network
149s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
05/08/2026, 00:22
Behavioral task
behavioral1
Sample
f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe
Resource
win10v2004-20260513-en
windows10-2004-x64
9 signatures
150 seconds
General
- Target f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe
- Size 560KB
- Sample260805-apbfws1yev
- SHA256 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8
- MD5 5c11af080985c0809eb1e00ad939abfe
- SHA1 217e9c9fae3e2840193f4d6f276b0bd33ebf48fc
- SHA512 f88d7120bbcf52bb6e9388c8b25d2a6543dddae796794b0e47f61d0fa574242a794733d7557e062bed6a3fa87fab054aef5c929fc232ed544d8c5a85380bf8f8
- SSDEEP 6144:i4ZaN1cb90oOTFmIFLq0cvnXhLCqj2EFNirGcEOkCybEaQRuy8K:irNOb9+sIF+0cvnXhLCqEsOkxHy
- TLSH T135C48D29B6E0C076C4B79578C4A186B6FAB17832372459CFA394075A1F337E2BA3570D
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 4984 b59f6818 - 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 1 114.114.114.114 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe Destination IP 3 223.5.5.5 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe Destination IP 23 114.114.114.114 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe Destination IP 24 223.5.5.5 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe - Drops file in System32 directory 13 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\66F835E41EC6A985EB9271E4A70169D7_CF44E3C99F7F4AC558EEB35244F7E046 b59f6818 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content b59f6818 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\66F835E41EC6A985EB9271E4A70169D7_CF44E3C99F7F4AC558EEB35244F7E046 b59f6818 File created C:\Windows\SysWOW64\b59f6818 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft b59f6818 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData b59f6818 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\81B9B36F9ABC4DA631A4713EE66FAEC6_D78A39BE9A7C3823659C09F61E8BD3E8 b59f6818 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\81B9B36F9ABC4DA631A4713EE66FAEC6_D78A39BE9A7C3823659C09F61E8BD3E8 b59f6818 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 b59f6818 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE b59f6818 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies b59f6818 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 b59f6818 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache b59f6818 -
resource yara_rule behavioral2/memory/752-0-0x0000000000A00000-0x0000000000A8C000-memory.dmp upx behavioral2/files/0x000700000001b867-2.dat upx behavioral2/memory/4984-3-0x0000000000900000-0x000000000098C000-memory.dmp upx behavioral2/memory/752-16-0x0000000000A00000-0x0000000000A8C000-memory.dmp upx behavioral2/memory/4984-17-0x0000000000900000-0x000000000098C000-memory.dmp upx behavioral2/memory/4984-26-0x0000000000900000-0x000000000098C000-memory.dmp upx - Drops file in Windows directory 2 IoCs
description ioc Process File opened for modification C:\Windows\5553f0 b59f6818 File opened for modification C:\Windows\cdfe0 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.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 b59f6818 Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe - 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\History\CachePrefix = "Visited:" b59f6818 Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ b59f6818 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" b59f6818 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" b59f6818 Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing b59f6818 Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix b59f6818 Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" b59f6818 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" b59f6818 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" b59f6818 - Suspicious behavior: EnumeratesProcesses 22 IoCs
pid Process 4984 b59f6818 4984 b59f6818 4984 b59f6818 4984 b59f6818 4984 b59f6818 4984 b59f6818 4984 b59f6818 4984 b59f6818 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe - Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe Token: SeTcbPrivilege 752 f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe Token: SeDebugPrivilege 4984 b59f6818 Token: SeTcbPrivilege 4984 b59f6818
Processes
-
C:\Users\Admin\AppData\Local\Temp\f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.exe"C:\Users\Admin\AppData\Local\Temp\f991b1c220e018530949917102519aca24f5dd6304e146d9f3d00bbaa2b7acc8.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:752
-
C:\Windows\Syswow64\b59f6818C:\Windows\Syswow64\b59f68181⤵
- 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:4984
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Windows\SysWOW64\b59f6818
- Size 560KB
- SHA256 257d1187a385db937e0dbea410a4933a86b37c857cdde074566fb6afdfd757cf
- MD5 7ff46273653849783c0c23ac56ed218a
- SHA1 556c169e7dffecedba7af24d2aa79fbecda2154a
- SHA512 4e18233fd4c97816404478a5e3a3ac9007d6b4ce0fb8053b423581dd5950378073f6c34cb88cd9f7b7c5c8fe6d689364d55c520157aed677db8a748061fdc64c
- SSDEEP 6144:f4ZaN1cb90oOTFmIFLq0cvnXhLCqj2EFNirGcEOkCybEaQRuy8K:frNOb9+sIF+0cvnXhLCqEsOkxHy
- TLSH T1A9C48D29B6E0C076C4B79578C4A186B6FAB17832372459CFA394075A1F337E2BA3570D
- MD5 SHA1 SHA512 SSDEEP TLSH