floxif | c67721f326a87009443b722d3720241da678773e57c602672574f100231ba487

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04-01-2025 10:45

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General

Target

c67721f326a87009443b722d3720241da678773e57c602672574f100231ba487N.dll
Size

500KB
MD5

a67d588f6eb0345a15b347057e39d2b0
SHA1

9959a0e42d64e3df4506e5992092a412c6eb6e7a
SHA256

c67721f326a87009443b722d3720241da678773e57c602672574f100231ba487
SHA512

079c874bf905b1fc4e30814691e9f26ac453e95251651dae195942edade2cb2b278cf0330e9f409ed06a13f5f1bfca81291782e17de2db208a14af77eee4e37e
SSDEEP

12288:ETLNQjAM800TVpm8j2NoSpmanmhUgiW6QR7t5s03Ooc8dHkC2esuDPoBjvrEH7w:ETLNQcMVYpEV03Ooc8dHkC2enDSrEH7w

Score

10^/10

floxif backdoor discovery persistence privilege_escalation 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/0x000b000000012280-1.dat	floxif

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000b000000012280-1.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
2724	rundll32.exe
2780	WerFault.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000b000000012280-1.dat	upx
behavioral1/memory/2724-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2724-8-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2780	2724	WerFault.exe	30

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	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2724	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2716 wrote to memory of 2724	2716	rundll32.exe	30
PID 2716 wrote to memory of 2724	2716	rundll32.exe	30
PID 2716 wrote to memory of 2724	2716	rundll32.exe	30
PID 2716 wrote to memory of 2724	2716	rundll32.exe	30
PID 2716 wrote to memory of 2724	2716	rundll32.exe	30
PID 2716 wrote to memory of 2724	2716	rundll32.exe	30
PID 2716 wrote to memory of 2724	2716	rundll32.exe	30
PID 2724 wrote to memory of 2780	2724	rundll32.exe	31
PID 2724 wrote to memory of 2780	2724	rundll32.exe	31
PID 2724 wrote to memory of 2780	2724	rundll32.exe	31
PID 2724 wrote to memory of 2780	2724	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c67721f326a87009443b722d3720241da678773e57c602672574f100231ba487N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2716
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c67721f326a87009443b722d3720241da678773e57c602672574f100231ba487N.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:2724
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2724 -s 312
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

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/2724-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2724-6-0x0000000074F80000-0x0000000074FED000-memory.dmp

Filesize
436KB

Download
memory/2724-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download