floxif | 987fdff465c5287f48059e085194071a25f78dabc64edd46505f7f4b9467899e

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-12-2024 02:52

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General

Target

987fdff465c5287f48059e085194071a25f78dabc64edd46505f7f4b9467899e.dll
Size

503KB
MD5

9db0a6aa8de3a9ded8bb8dad497a9b0f
SHA1

58de13ec275f8307cb96d272d3daaf9de161a5a3
SHA256

987fdff465c5287f48059e085194071a25f78dabc64edd46505f7f4b9467899e
SHA512

339df71b495eb664909e66186ee91047296bfb97bf3ac8f2e47c0b1e449d87f2b3cd18d70a1687f058bb2c07b16866f62119331ef6845ed444d3b984388fc2c0
SSDEEP

12288:uSCeuqF7KYKeTIfX4ArBaA5q9vonshRKermBzTBjvrEH77G:hC5U79rIgAdaAConshRgBzJrEH77G

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/0x0032000000023b5c-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0032000000023b5c-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4344	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0032000000023b5c-1.dat	upx
behavioral2/memory/4344-2-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4344-8-0x0000000010000000-0x0000000010030000-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
2992	4344	WerFault.exe	83

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	4344	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3772 wrote to memory of 4344	3772	rundll32.exe	83
PID 3772 wrote to memory of 4344	3772	rundll32.exe	83
PID 3772 wrote to memory of 4344	3772	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\987fdff465c5287f48059e085194071a25f78dabc64edd46505f7f4b9467899e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3772
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\987fdff465c5287f48059e085194071a25f78dabc64edd46505f7f4b9467899e.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4344
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4344 -s 716
    3⤵
    - Program crash
    PID:2992

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4344 -ip 4344
1⤵
PID:2696

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/4344-2-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4344-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4344-6-0x00000000749B0000-0x0000000074A1C000-memory.dmp

Filesize
432KB

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