floxif | c9c09648b3dc82766347c02854be9929a990324cf21661dd95d75d9fc3515987

Analysis

max time kernel
93s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02/10/2024, 13:13

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General

Target

c9c09648b3dc82766347c02854be9929a990324cf21661dd95d75d9fc3515987.dll
Size

382KB
MD5

aaa2acfc08f2369963124f9cbb32726d
SHA1

a16166ac833c261ff69e1948775075fd7a75c84c
SHA256

c9c09648b3dc82766347c02854be9929a990324cf21661dd95d75d9fc3515987
SHA512

afaaedd04f545e5618eae7cd1b95ba9f5a7614aae5de9fc7835310c0a35a7d84451a5583fad74749cbc58401a2b39200f94d66e1c590fc4f594ecfdb4313b8c7
SSDEEP

6144:5j0fiu3TcIeWdIOeyCcufgtRDzKUEiFAKtDYTBV+UdvrEFp7hKT7o:5jsiuoXWdIO6ccmKUZSlTBjvrEH7IE

Score

10^/10

floxif backdoor discovery trojan upx

Malware Config

Signatures

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/0x00090000000233e0-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00090000000233e0-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4048	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4048-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x00090000000233e0-1.dat	upx
behavioral2/memory/4048-8-0x0000000010000000-0x0000000010030000-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
2564	4048	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	4048	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 4048	3016	rundll32.exe	82
PID 3016 wrote to memory of 4048	3016	rundll32.exe	82
PID 3016 wrote to memory of 4048	3016	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c9c09648b3dc82766347c02854be9929a990324cf21661dd95d75d9fc3515987.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c9c09648b3dc82766347c02854be9929a990324cf21661dd95d75d9fc3515987.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4048
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4048 -s 740
    3⤵
    - Program crash
    PID:2564

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4048 -ip 4048
1⤵
PID:2952

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/4048-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4048-6-0x0000000075750000-0x00000000757A0000-memory.dmp

Filesize
320KB

Download
memory/4048-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download