floxif | 6d66fb5630ddb55a963137f08d4f779aa6d85258a8bc149bf5f37d2c27f59b1c

Analysis

max time kernel
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
31/10/2026, 07:28

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General

Target
6d66fb5630ddb55a963137f08d4f779aa6d85258a8bc149bf5f37d2c27f59b1c.dll
Size 877KB
Sample261031-japveagf99
SHA256 6d66fb5630ddb55a963137f08d4f779aa6d85258a8bc149bf5f37d2c27f59b1c
MD5 690aa303074dd77bc8dd1bb8d0f858c9
SHA1 799c6559fd2ee1a4eaaf137dd1723bdedca74bbd
SHA512 c93be91ce14353ca77f4c77c57d6c853b415e63880d6ab4a4389e1d759048295795712a4c2848dd6f9b3ff853375305c9da1e6ccd4a08cb5d1fc2d3e333bcdd2
SSDEEP 24576:8Q8aDWQuuS4SbzfOZwE5cZTYmxVDgySsMRGJ/qofbGs:8jaRxS44E5oTYcVDgyx1qa
TLSH
T1F015AF117FCDC3F6D34D1571642EAB2F167AA668173086D3F7801E6A5D34AC2AE3824B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor discovery floxif trojan upx

Malware Config

Signatures

Family: 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/0x00070000000187c1-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00070000000187c1-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2420	rundll32.exe

Network Service Discovery 1 TTPs 1 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
2044	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00070000000187c1-1.dat	upx
behavioral2/memory/2420-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/2420-7-0x0000000010000000-0x0000000010033000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2420	rundll32.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3596 wrote to memory of 2420	3596	rundll32.exe	88
PID 2420 wrote to memory of 2044	2420	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6d66fb5630ddb55a963137f08d4f779aa6d85258a8bc149bf5f37d2c27f59b1c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3596
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\6d66fb5630ddb55a963137f08d4f779aa6d85258a8bc149bf5f37d2c27f59b1c.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2420
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2044

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

symsrv.dll

Path C:\Program Files\Common Files\System\symsrv.dll
Size 71KB
SHA256 8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d
MD5 4fcd7574537cebec8e75b4e646996643
SHA1 efa59bb9050fb656b90d5d40c942fb2a304f2a8b
SHA512 7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e
SSDEEP 1536:5POOhfbOjovgdVydUgoNrwBZXGDaZ1QIxrfItMgR7ZaO+fGxHZPEP:5dbwovEVyqgoZmZXWfIdQdRaefPq
TLSH
T1D173E0B72DFC4865E1A12277865F4319EA31D4778110E86BC9080BC9CDBA9E0E7536BE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2420-4-0x0000000010000000-0x0000000010033000-memory.dmp

Download

memory/2420-7-0x0000000010000000-0x0000000010033000-memory.dmp