floxif | 211b85d27bb579db689e9d3a15632b346d6532075cdf80fab63540d344f4318c

Analysis

max time kernel
94s
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
02-01-2025 20:36

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General

Target

211b85d27bb579db689e9d3a15632b346d6532075cdf80fab63540d344f4318c.dll
Size

577KB
MD5

089ed69626ecba88d6ce4c9c2b4c544a
SHA1

e89f6b2ca548313763065b99125e107c5e0e2e80
SHA256

211b85d27bb579db689e9d3a15632b346d6532075cdf80fab63540d344f4318c
SHA512

6dc50c557feb48302192fedba827fc5587e3d83ca3d152b176217e0e7355ac61fc6f50ae45a4191423eb812f7bf8f7b90c9a4fb7bdda16208a989606ee8ea8aa
SSDEEP

12288:hw/oUl2eOOZ/Ql5ZWIvHdHl7EX0JbRoFO1fSBinb2nYyCnQtvo4nHnBjvrEH7Yd:haUdHldbXfSob2n8nQJoWlrEH7I

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/0x000c000000023ba9-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023ba9-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
3292	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023ba9-1.dat	upx
behavioral2/memory/3292-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3292-13-0x0000000010000000-0x0000000010030000-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 2 IoCs

pid	pid_target	Process	procid_target
3620	3292	WerFault.exe	82
376	3292	WerFault.exe	82

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	3292	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 624 wrote to memory of 3292	624	rundll32.exe	82
PID 624 wrote to memory of 3292	624	rundll32.exe	82
PID 624 wrote to memory of 3292	624	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\211b85d27bb579db689e9d3a15632b346d6532075cdf80fab63540d344f4318c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:624
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\211b85d27bb579db689e9d3a15632b346d6532075cdf80fab63540d344f4318c.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:3292
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3292 -s 752
    3⤵
    - Program crash
    PID:3620
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3292 -s 760
    3⤵
    - Program crash
    PID:376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3292 -ip 3292
1⤵
PID:4360

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3292 -ip 3292
1⤵
PID:3816

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/3292-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3292-5-0x00000000753F1000-0x00000000753F2000-memory.dmp

Filesize
4KB

Download
memory/3292-8-0x00000000753F0000-0x0000000075470000-memory.dmp

Filesize
512KB

Download
memory/3292-10-0x00000000753F0000-0x0000000075470000-memory.dmp

Filesize
512KB

Download
memory/3292-13-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download