floxif | ecfb1b075079a0ed6bad844d70f468748879f1820f5b376d329a6bb2e867ad37

Analysis

max time kernel
93s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-12-2024 23:17

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General

Target

ecfb1b075079a0ed6bad844d70f468748879f1820f5b376d329a6bb2e867ad37N.dll
Size

170KB
MD5

131f32055e101e65647c3338e4a0b240
SHA1

354727265de946b3d24660f85e08f671d539e285
SHA256

ecfb1b075079a0ed6bad844d70f468748879f1820f5b376d329a6bb2e867ad37
SHA512

f5fb0c9a4ce3216513ed5bf68fc91a26cdf35ed2f20453ca49c40ae9ff9474e96df58afb75d2ff9221e66d3167cb6699b72af173c44e4df0b4a49d8e4b2cc0ea
SSDEEP

3072:3po0Y6ZweTaif6sCGP2lQBV+UdE+rECWp7hKHO:59Zwe5BV+UdvrEFp7hKu

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/0x000a000000023c8f-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000a000000023c8f-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
3240	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000023c8f-1.dat	upx
behavioral2/memory/3240-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3240-7-0x0000000010000000-0x0000000010030000-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
2984	3240	WerFault.exe	85

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	3240	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3416 wrote to memory of 3240	3416	rundll32.exe	85
PID 3416 wrote to memory of 3240	3416	rundll32.exe	85
PID 3416 wrote to memory of 3240	3416	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ecfb1b075079a0ed6bad844d70f468748879f1820f5b376d329a6bb2e867ad37N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3416
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ecfb1b075079a0ed6bad844d70f468748879f1820f5b376d329a6bb2e867ad37N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:3240
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3240 -s 724
    3⤵
    - Program crash
    PID:2984

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3240 -ip 3240
1⤵
PID:2108

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/3240-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3240-6-0x0000000074E80000-0x0000000074E9B000-memory.dmp

Filesize
108KB

Download
memory/3240-7-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download