floxif | 261ab21d24448a289b5ce13ed9e89facd67b069d4ccd4715f5f3933a11ae2c5b

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10/12/2024, 06:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

261ab21d24448a289b5ce13ed9e89facd67b069d4ccd4715f5f3933a11ae2c5b.dll
Size

2.7MB
MD5

ff9b48aa765dd53fa805ab91836c8b20
SHA1

71251c34487a4b687597751503dae82945e589d6
SHA256

261ab21d24448a289b5ce13ed9e89facd67b069d4ccd4715f5f3933a11ae2c5b
SHA512

800dfa27d5ab68cb07c8f20c6c803df220f80971365ed4d91bfd5dff7304e383841519ebe9f68689dc4b3b51190ccd508179a35c7a402e1efb228b8f05a75d81
SSDEEP

49152:FMOYy4DN360WiMj7ivQDfl3qUbgeGIWlE1P9pqid4A9xhCK0QzaSxuYYsXfXWTHA:Foh07qE1P9pzv9xZ0Jlu

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
behavioral2/files/0x0009000000023c35-3.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023c35-3.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
2452	rundll32.exe
2452	rundll32.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2452-7-0x0000000001110000-0x0000000001140000-memory.dmp	upx
behavioral2/memory/2452-6-0x0000000001110000-0x0000000001140000-memory.dmp	upx
behavioral2/files/0x0009000000023c35-3.dat	upx
behavioral2/memory/2452-12-0x0000000001110000-0x0000000001140000-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
4044	2452	WerFault.exe	84

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	2452	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3112 wrote to memory of 2452	3112	rundll32.exe	84
PID 3112 wrote to memory of 2452	3112	rundll32.exe	84
PID 3112 wrote to memory of 2452	3112	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\261ab21d24448a289b5ce13ed9e89facd67b069d4ccd4715f5f3933a11ae2c5b.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3112
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\261ab21d24448a289b5ce13ed9e89facd67b069d4ccd4715f5f3933a11ae2c5b.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2452
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2452 -s 732
    3⤵
    - Program crash
    PID:4044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 200 -p 2452 -ip 2452
1⤵
PID:4592

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

Loading Replay Monitor...

Downloads

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/2452-7-0x0000000001110000-0x0000000001140000-memory.dmp

Filesize
192KB

Download
memory/2452-6-0x0000000001110000-0x0000000001140000-memory.dmp

Filesize
192KB

Download
memory/2452-8-0x0000000010001000-0x0000000010002000-memory.dmp

Filesize
4KB

Download
memory/2452-12-0x0000000001110000-0x0000000001140000-memory.dmp

Filesize
192KB

Download
memory/2452-10-0x0000000010000000-0x000000001029D000-memory.dmp

Filesize
2.6MB

Download