Analysis
- max time kernel
149s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
15/04/2026, 08:48
Behavioral task
behavioral1
Sample
1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe
Resource
win10v2004-20260130-en
windows10-2004-x64
9 signatures
150 seconds
General
- Target 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe
- Size 761KB
- Sample260415-kqs3fac14x
- SHA256 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184
- MD5 b8a0a09f03c0427ea2802ded861f0690
- SHA1 54914ad54d7235071bf298c67996e322f93a8dae
- SHA512 3e993f600939586ecdfda6648a8cac9bb572a41ce2bbff8fa7c906fc34dda9e594ebec0662c2ab9ecf7c6a87100532083273879398845a7e8052210400f67ab9
- SSDEEP 12288:6SvO2x9mONvKRwLSFtsOkxHya5hYIW0p98B:hvO2xJKRw2kOkxSkW298B
- TLSH T1CBF49E35A2808036C0B34532C6F94AABF9797D35631565CBA3843B662F737D2BA3570E
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 3816 a77f93b1 - 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 18 223.5.5.5 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe Destination IP 1 114.114.114.114 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe Destination IP 2 223.5.5.5 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe Destination IP 17 114.114.114.114 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.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 a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\66F835E41EC6A985EB9271E4A70169D7_CF44E3C99F7F4AC558EEB35244F7E046 a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\66F835E41EC6A985EB9271E4A70169D7_CF44E3C99F7F4AC558EEB35244F7E046 a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\81B9B36F9ABC4DA631A4713EE66FAEC6_D78A39BE9A7C3823659C09F61E8BD3E8 a77f93b1 File created C:\Windows\SysWOW64\a77f93b1 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 a77f93b1 File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache a77f93b1 -
resource yara_rule behavioral2/memory/1844-0-0x0000000000D10000-0x0000000000D9C000-memory.dmp upx behavioral2/memory/3816-4-0x0000000000D90000-0x0000000000E1C000-memory.dmp upx behavioral2/files/0x000a00000000d352-3.dat upx behavioral2/memory/1844-18-0x0000000000D10000-0x0000000000D9C000-memory.dmp upx behavioral2/memory/3816-19-0x0000000000D90000-0x0000000000E1C000-memory.dmp upx behavioral2/memory/3816-30-0x0000000000D90000-0x0000000000E1C000-memory.dmp upx - Drops file in Windows directory 2 IoCs
description ioc Process File opened for modification C:\Windows\4154d0 a77f93b1 File opened for modification C:\Windows\1f91e8 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.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 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language a77f93b1 - Modifies data under HKEY_USERS 9 IoCs
description ioc Process Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" a77f93b1 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" a77f93b1 Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" a77f93b1 Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ a77f93b1 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" a77f93b1 Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" a77f93b1 Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing a77f93b1 Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix a77f93b1 Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" a77f93b1 - Suspicious behavior: EnumeratesProcesses 14 IoCs
pid Process 3816 a77f93b1 3816 a77f93b1 3816 a77f93b1 3816 a77f93b1 3816 a77f93b1 3816 a77f93b1 3816 a77f93b1 3816 a77f93b1 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe - Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe Token: SeTcbPrivilege 1844 1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe Token: SeDebugPrivilege 3816 a77f93b1 Token: SeTcbPrivilege 3816 a77f93b1
Processes
-
C:\Users\Admin\AppData\Local\Temp\1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.exe"C:\Users\Admin\AppData\Local\Temp\1571b2d0739306db78698a6016fa3ea76384fddb71323f75116feb1b2e72c184.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:1844
-
C:\Windows\Syswow64\a77f93b1C:\Windows\Syswow64\a77f93b11⤵
- 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:3816
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Windows\SysWOW64\a77f93b1
- Size 761KB
- SHA256 f3e71c451820f6e941b81b5561c4cd55144ca59c3b679a0df82510936eb09ae0
- MD5 15da9d4b4e75589e997fcdde6c70aed4
- SHA1 8d283cb4afe8e91d7349e4c761c00a6cd002b657
- SHA512 c497fcbf1a60f9cacc8e817204197b8041d3dd2705fd1b08fb2927950e6123ce5cd1b0135c82cd4b95310ddc113340d135bd40c06ad5d7c66ef988195665f5a4
- SSDEEP 12288:tSvO2x9mONvKRwLSFtsOkxHya5hYIW0p98B:svO2xJKRw2kOkxSkW298B
- TLSH T126F49E35A2808036C0B34532C6F94AABF9797D35631565CBA3843B662F737D2BA3570E
- MD5 SHA1 SHA512 SSDEEP TLSH