floxif | 8d2faa7f1e084da42a9e1c682eca9a96d3433c7b4f6529483d2a457f214aacbe

Analysis

max time kernel
149s
max time network
153s
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, 08:40

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General

Target

8d2faa7f1e084da42a9e1c682eca9a96d3433c7b4f6529483d2a457f214aacbe.dll
Size

3.0MB
MD5

dbafb6b3b190c8b66e7b0d82b7df6b1d
SHA1

22bd5f49935fab86d019ceb1121f39d54efd9a1a
SHA256

8d2faa7f1e084da42a9e1c682eca9a96d3433c7b4f6529483d2a457f214aacbe
SHA512

6447b68730641b2ef338027b2b23e0d91c080f61778c1f4944da616e07ae835d1a718116d21ce14b52dd89b0a6de68797652db5fd8271c53c94318c133f89d0b
SSDEEP

49152:j0ueFbrEYcfhx88NZemVdCn7Bwr5joR5V5j0uOR:j0ax8Xn7Y7vR

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/0x0008000000023cbe-6.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0008000000023cbe-6.dat	acprotect

Executes dropped EXE 1 IoCs

pid	Process
1964	rundll32mgr.exe

Loads dropped DLL 1 IoCs

pid	Process
1964	rundll32mgr.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32mgr.exe	rundll32.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023c64-2.dat	upx
behavioral2/memory/1964-10-0x0000000000400000-0x0000000000463000-memory.dmp	upx
behavioral2/memory/1964-9-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x0008000000023cbe-6.dat	upx
behavioral2/memory/1964-13-0x0000000000400000-0x0000000000463000-memory.dmp	upx
behavioral2/memory/1964-14-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32mgr.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2632	1964	WerFault.exe	86

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	rundll32mgr.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1964	rundll32mgr.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3528 wrote to memory of 3388	3528	rundll32.exe	85
PID 3528 wrote to memory of 3388	3528	rundll32.exe	85
PID 3528 wrote to memory of 3388	3528	rundll32.exe	85
PID 3388 wrote to memory of 1964	3388	rundll32.exe	86
PID 3388 wrote to memory of 1964	3388	rundll32.exe	86
PID 3388 wrote to memory of 1964	3388	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8d2faa7f1e084da42a9e1c682eca9a96d3433c7b4f6529483d2a457f214aacbe.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3528
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8d2faa7f1e084da42a9e1c682eca9a96d3433c7b4f6529483d2a457f214aacbe.dll,#1
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3388
- - C:\Windows\SysWOW64\rundll32mgr.exe
    C:\Windows\SysWOW64\rundll32mgr.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1964
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1964 -s 384
      4⤵
      Program crash
      PID:2632

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1964 -ip 1964
1⤵
PID:1096

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
C:\Windows\SysWOW64\rundll32mgr.exe

Filesize
209KB

MD5
59859a109082f7ce78fd48ae3c8b1441

SHA1
26aa26e72ac325967937afa567ac3b043ee06464

SHA256
1b9874755981b2183c3d2fdd25f4f09d869484dbc6643c4b62cea86e7b9fc39a

SHA512
5943a6829eeb75e23bc4f9d878dbd51629c7a9fafae913d9c3037a6b0f328708aae452b2bbc3696d7c89d47690295dceddbdcf77b1623ce7fc629cb4c21841a8

Download Submit
memory/1964-10-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/1964-9-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1964-12-0x00000000005A0000-0x00000000005A1000-memory.dmp

Filesize
4KB

Download
memory/1964-13-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/1964-14-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3388-5-0x0000000074EF0000-0x000000007532C000-memory.dmp

Filesize
4.2MB

Download