floxif | 08282bf480bc42a409c74d8d2c27dbf1840def907f92892f17d5fe1ca7e3b739

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
12/10/2024, 09:14

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General

Target

08282bf480bc42a409c74d8d2c27dbf1840def907f92892f17d5fe1ca7e3b739N.dll
Size

135KB
MD5

054a929198d8e58b89915c5a6bb5a050
SHA1

047e8dcabd4b7dc337648d161c4cc26b954c37b0
SHA256

08282bf480bc42a409c74d8d2c27dbf1840def907f92892f17d5fe1ca7e3b739
SHA512

c55978c736adec445242a6146b3b3b959473017af1c0b3f89e6d4596d47986b4f1c5383b5757ecfd79d8d82f02846d1d87a5f39c9713f635a73c0e6e85f231a2
SSDEEP

3072:uiC/82anJKoFmdPvhrN2lQBV+UdE+rECWp7hKRx:uD8rJjmdPvvBV+UdvrEFp7hKv

Score

10^/10

floxif backdoor discovery trojan upx

Malware Config

Signatures

Floxif, Floodfix
Floxif aka FloodFix is a file-changing trojan and backdoor written in C++.
backdoor trojan floxif

Detects Floxif payload 1 IoCs

backdoor

resource	yara_rule
behavioral2/files/0x0008000000023c7a-3.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0008000000023c7a-3.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
3884	regsvr32.exe
3884	regsvr32.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3884-7-0x0000000001640000-0x0000000001670000-memory.dmp	upx
behavioral2/files/0x0008000000023c7a-3.dat	upx
behavioral2/memory/3884-8-0x0000000001640000-0x0000000001670000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	regsvr32.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe

Modifies registry class 62 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\UltraISO\shellex\ContextMenuHandlers\ISOShell\ = "{AD392E40-428C-459F-961E-9B147782D099}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ISOShell.UIContextMenu\CLSID\ = "{AD392E40-428C-459F-961E-9B147782D099}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{1CD46142-F3D3-4E46-87BA-7CC019142F9D}\1.0\0\win32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{1CD46142-F3D3-4E46-87BA-7CC019142F9D}\1.0\ = "ISOShell 1.0 Type Library"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\ = "IUIContextMenu"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ISOShell.UIContextMenu.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\VersionIndependentProgID\ = "ISOShell.UIContextMenu"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{1CD46142-F3D3-4E46-87BA-7CC019142F9D}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\binimage\shellex	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ISOShell.UIContextMenu\ = "UIContextMenu Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\TypeLib\ = "{1CD46142-F3D3-4E46-87BA-7CC019142F9D}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{1CD46142-F3D3-4E46-87BA-7CC019142F9D}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\08282bf480bc42a409c74d8d2c27dbf1840def907f92892f17d5fe1ca7e3b739N.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\TypeLib\ = "{1CD46142-F3D3-4E46-87BA-7CC019142F9D}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\UltraISO\ = "{AD392E40-428C-459F-961E-9B147782D099}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ISOShell.UIContextMenu.1\ = "UIContextMenu Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\UltraISO	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\ProgID\ = "ISOShell.UIContextMenu.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\ContextMenuHandlers\UltraISO\ = "{AD392E40-428C-459F-961E-9B147782D099}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\UltraISO\shellex\ContextMenuHandlers	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\binimage\shellex\ContextMenuHandlers\ISOShell	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ISOShell.UIContextMenu	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\ContextMenuHandlers\UltraISO	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\ContextMenuHandlers\UltraISO\ = "{AD392E40-428C-459F-961E-9B147782D099}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\binimage\shellex\ContextMenuHandlers	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\ = "UIContextMenu Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{1CD46142-F3D3-4E46-87BA-7CC019142F9D}\1.0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{1CD46142-F3D3-4E46-87BA-7CC019142F9D}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\TypeLib\ = "{1CD46142-F3D3-4E46-87BA-7CC019142F9D}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\UltraISO	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\UltraISO\shellex\ContextMenuHandlers\ISOShell	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ISOShell.UIContextMenu\CurVer\ = "ISOShell.UIContextMenu.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\UltraISO\shellex	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ISOShell.UIContextMenu.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\ContextMenuHandlers\UltraISO	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ISOShell.UIContextMenu\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ISOShell.UIContextMenu\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\binimage	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\binimage\shellex\ContextMenuHandlers\ISOShell\ = "{AD392E40-428C-459F-961E-9B147782D099}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{1CD46142-F3D3-4E46-87BA-7CC019142F9D}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{1CD46142-F3D3-4E46-87BA-7CC019142F9D}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{1CD46142-F3D3-4E46-87BA-7CC019142F9D}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{1CD46142-F3D3-4E46-87BA-7CC019142F9D}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9653DE66-C5E0-4AEE-ADE5-0197BA68CE2B}\ = "IUIContextMenu"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ISOShell.UIContextMenu.1\CLSID\ = "{AD392E40-428C-459F-961E-9B147782D099}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AD392E40-428C-459F-961E-9B147782D099}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\08282bf480bc42a409c74d8d2c27dbf1840def907f92892f17d5fe1ca7e3b739N.dll"	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3884	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2732 wrote to memory of 3884	2732	regsvr32.exe	83
PID 2732 wrote to memory of 3884	2732	regsvr32.exe	83
PID 2732 wrote to memory of 3884	2732	regsvr32.exe	83

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\08282bf480bc42a409c74d8d2c27dbf1840def907f92892f17d5fe1ca7e3b739N.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2732
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\08282bf480bc42a409c74d8d2c27dbf1840def907f92892f17d5fe1ca7e3b739N.dll
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  PID:3884

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\Common Files\System\symsrv.dll

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/3884-7-0x0000000001640000-0x0000000001670000-memory.dmp

Filesize
192KB

Download
memory/3884-6-0x0000000001640000-0x0000000001670000-memory.dmp

Filesize
192KB

Download
memory/3884-8-0x0000000001640000-0x0000000001670000-memory.dmp

Filesize
192KB

Download