floxif | 93f1a9a7a5e92cd4730bc17f550308f57f54f9444e7db76659e084f797cab69e

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-11-2024 01:45

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General

Target

93f1a9a7a5e92cd4730bc17f550308f57f54f9444e7db76659e084f797cab69e.dll
Size

481KB
MD5

8418cca265fd05ffd27425cd380d2d85
SHA1

add9f3aa0c50e3e4236dc9615e02ca7322538f56
SHA256

93f1a9a7a5e92cd4730bc17f550308f57f54f9444e7db76659e084f797cab69e
SHA512

7ae5c5da2e6f8a62d3926760a780ded46b7bab3cf7ba0b7601a9ab12ccacd0e005ad6cd37bce38b87bb72acf8d43575a71191899ca86215fb53ccad46e9377b1
SSDEEP

6144:ClIXG/SBt0jwVoY/pWEKDzPJxPPUIK1qDqNwJBV+UdvrEFp7hKCg:NG/pwCY/M5hM8q6JBjvrEH7A

Score

10^/10

floxif backdoor discovery trojan upx

Malware Config

Signatures

Floxif family
floxif
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
behavioral1/files/0x00080000000120ff-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x00080000000120ff-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
808	regsvr32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00080000000120ff-1.dat	upx
behavioral1/memory/808-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/808-6-0x0000000010000000-0x0000000010030000-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 64 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D90-E448-11D0-84A3-00DD01104159}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D87-E448-11D0-84A3-00DD01104159}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D87-E448-11D0-84A3-00DD01104159}\ = "Band"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D87-E448-11D0-84A3-00DD01104159}\ProxyStubClsid	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D96-E448-11D0-84A3-00DD01104159}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D96-E448-11D0-84A3-00DD01104159}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D92-E448-11D0-84A3-00DD01104159}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D8D-E448-11D0-84A3-00DD01104159}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5522DAFA-06D6-11D2-8D70-00A0C98B28E2}\VERSION	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D91-E448-11D0-84A3-00DD01104159}\TypeLib\ = "{38911DA0-E448-11D0-84A3-00DD01104159}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D96-E448-11D0-84A3-00DD01104159}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D92-E448-11D0-84A3-00DD01104159}\TypeLib\ = "{38911DA0-E448-11D0-84A3-00DD01104159}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{5522DB03-06D6-11D2-8D70-00A0C98B28E2}\TypeLib\Version = "1.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D96-E448-11D0-84A3-00DD01104159}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D87-E448-11D0-84A3-00DD01104159}\Forward\ = "{5522DAF7-06D6-11D2-8D70-00A0C98B28E2}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{5522DB03-06D6-11D2-8D70-00A0C98B28E2}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5522DB04-06D6-11D2-8D70-00A0C98B28E2}\Implemented Categories\{40FC6ED5-2438-11CF-A3DB-080036F12502}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D96-E448-11D0-84A3-00DD01104159}\TypeLib\ = "{38911DA0-E448-11D0-84A3-00DD01104159}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{5522DB03-06D6-11D2-8D70-00A0C98B28E2}\ = "_BandProperties"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D9C-E448-11D0-84A3-00DD01104159}\Forward\ = "{5522DB03-06D6-11D2-8D70-00A0C98B28E2}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D92-E448-11D0-84A3-00DD01104159}\ToolboxBitmap32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\93f1a9a7a5e92cd4730bc17f550308f57f54f9444e7db76659e084f797cab69e.dll, 30000"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TYPELIB\{38911DA0-E448-11D0-84A3-00DD01104159}\1.1\FLAGS\ = "2"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{5522DAF9-06D6-11D2-8D70-00A0C98B28E2}\ProxyStubClsid	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{5522DAF9-06D6-11D2-8D70-00A0C98B28E2}\TypeLib\Version = "1.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5522DB04-06D6-11D2-8D70-00A0C98B28E2}\VERSION\ = "1.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D9C-E448-11D0-84A3-00DD01104159}\Forward	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D92-E448-11D0-84A3-00DD01104159}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5522DB04-06D6-11D2-8D70-00A0C98B28E2}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D92-E448-11D0-84A3-00DD01104159}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\93f1a9a7a5e92cd4730bc17f550308f57f54f9444e7db76659e084f797cab69e.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{5522DB03-06D6-11D2-8D70-00A0C98B28E2}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D8E-E448-11D0-84A3-00DD01104159}\ = "ComCtl3.CoolBarPage"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5522DB04-06D6-11D2-8D70-00A0C98B28E2}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5522DAFA-06D6-11D2-8D70-00A0C98B28E2}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D91-E448-11D0-84A3-00DD01104159}\ = "CoolBar"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D92-E448-11D0-84A3-00DD01104159}\Implemented Categories\{0DE86A52-2BAA-11CF-A229-00AA003D7352}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D8D-E448-11D0-84A3-00DD01104159}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{5522DAF9-06D6-11D2-8D70-00A0C98B28E2}\TypeLib\ = "{38911DA0-E448-11D0-84A3-00DD01104159}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D96-E448-11D0-84A3-00DD01104159}\TypeLib\Version = "1.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5522DAFA-06D6-11D2-8D70-00A0C98B28E2}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D91-E448-11D0-84A3-00DD01104159}\TypeLib\ = "{38911DA0-E448-11D0-84A3-00DD01104159}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{5522DAF7-06D6-11D2-8D70-00A0C98B28E2}\TypeLib\ = "{38911DA0-E448-11D0-84A3-00DD01104159}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{5522DAF9-06D6-11D2-8D70-00A0C98B28E2}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D8D-E448-11D0-84A3-00DD01104159}\TypeLib\Version = "1.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D96-E448-11D0-84A3-00DD01104159}\ = "__CoolBar"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D96-E448-11D0-84A3-00DD01104159}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D9C-E448-11D0-84A3-00DD01104159}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5522DAFA-06D6-11D2-8D70-00A0C98B28E2}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TYPELIB\{38911DA0-E448-11D0-84A3-00DD01104159}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D91-E448-11D0-84A3-00DD01104159}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{5522DAF7-06D6-11D2-8D70-00A0C98B28E2}\ = "_Band"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{5522DB03-06D6-11D2-8D70-00A0C98B28E2}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D8D-E448-11D0-84A3-00DD01104159}\TypeLib\ = "{38911DA0-E448-11D0-84A3-00DD01104159}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D9C-E448-11D0-84A3-00DD01104159}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ComCtl3.Bands	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D8A-E448-11D0-84A3-00DD01104159}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D91-E448-11D0-84A3-00DD01104159}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D92-E448-11D0-84A3-00DD01104159}\VERSION	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{38911D8D-E448-11D0-84A3-00DD01104159}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D8D-E448-11D0-84A3-00DD01104159}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D90-E448-11D0-84A3-00DD01104159}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\93f1a9a7a5e92cd4730bc17f550308f57f54f9444e7db76659e084f797cab69e.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5522DAF8-06D6-11D2-8D70-00A0C98B28E2}\Implemented Categories	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{38911D92-E448-11D0-84A3-00DD01104159}\Implemented Categories	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{5522DAF7-06D6-11D2-8D70-00A0C98B28E2}\TypeLib\ = "{38911DA0-E448-11D0-84A3-00DD01104159}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{38911D8F-E448-11D0-84A3-00DD01104159}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	808	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 808	1520	regsvr32.exe	30
PID 1520 wrote to memory of 808	1520	regsvr32.exe	30
PID 1520 wrote to memory of 808	1520	regsvr32.exe	30
PID 1520 wrote to memory of 808	1520	regsvr32.exe	30
PID 1520 wrote to memory of 808	1520	regsvr32.exe	30
PID 1520 wrote to memory of 808	1520	regsvr32.exe	30
PID 1520 wrote to memory of 808	1520	regsvr32.exe	30

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\93f1a9a7a5e92cd4730bc17f550308f57f54f9444e7db76659e084f797cab69e.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1520
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\93f1a9a7a5e92cd4730bc17f550308f57f54f9444e7db76659e084f797cab69e.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:808

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

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/808-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/808-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download