floxif | 242fcce8e3ba9a5e36a1de52a279aea7b1555ceae54b9c786d2e3249a14ecfc9

Analysis

max time kernel
145s
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
01-01-2025 20:53

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General

Target

242fcce8e3ba9a5e36a1de52a279aea7b1555ceae54b9c786d2e3249a14ecfc9.dll
Size

178KB
MD5

3c7d1ed365301aca635cd536e0465fd8
SHA1

6f15fcaab1a964393ca21bdf8bcedbcc771ee4f0
SHA256

242fcce8e3ba9a5e36a1de52a279aea7b1555ceae54b9c786d2e3249a14ecfc9
SHA512

5d07e4418de8430dc0b01c6a8e593e09641fc57f0deae6f59846e92e9d538534a611abc7d6a8bd0f4e6ae18dbb45385521778751696781e3ddc0a4dadd23164e
SSDEEP

3072:2GbYMj7630VknYm6VxpTOZWdpAsQvVqRlkM4OAD/KLznBuB2JA2Bj06:EA76kVnpTOZWd2sQvMRlkM4RD/qzMfUF

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/0x000c000000023b8f-2.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b8f-2.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2320	rundll32.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
4044	arp.exe
3908	arp.exe
4344	arp.exe
1260	arp.exe
3472	arp.exe
1788	arp.exe
1664	arp.exe
2644	arp.exe
1216	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2320-3-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/files/0x000c000000023b8f-2.dat	upx
behavioral2/memory/2320-10-0x0000000010000000-0x0000000010033000-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
1096	2320	WerFault.exe	83
3156	2320	WerFault.exe	83

System Location Discovery: System Language Discovery 1 TTPs 10 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	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2320	rundll32.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 2320	2040	rundll32.exe	83
PID 2040 wrote to memory of 2320	2040	rundll32.exe	83
PID 2040 wrote to memory of 2320	2040	rundll32.exe	83
PID 2320 wrote to memory of 4044	2320	rundll32.exe	85
PID 2320 wrote to memory of 4044	2320	rundll32.exe	85
PID 2320 wrote to memory of 4044	2320	rundll32.exe	85
PID 2320 wrote to memory of 1664	2320	rundll32.exe	88
PID 2320 wrote to memory of 1664	2320	rundll32.exe	88
PID 2320 wrote to memory of 1664	2320	rundll32.exe	88
PID 2320 wrote to memory of 1788	2320	rundll32.exe	89
PID 2320 wrote to memory of 1788	2320	rundll32.exe	89
PID 2320 wrote to memory of 1788	2320	rundll32.exe	89
PID 2320 wrote to memory of 3908	2320	rundll32.exe	90
PID 2320 wrote to memory of 3908	2320	rundll32.exe	90
PID 2320 wrote to memory of 3908	2320	rundll32.exe	90
PID 2320 wrote to memory of 4344	2320	rundll32.exe	91
PID 2320 wrote to memory of 4344	2320	rundll32.exe	91
PID 2320 wrote to memory of 4344	2320	rundll32.exe	91
PID 2320 wrote to memory of 1260	2320	rundll32.exe	92
PID 2320 wrote to memory of 1260	2320	rundll32.exe	92
PID 2320 wrote to memory of 1260	2320	rundll32.exe	92
PID 2320 wrote to memory of 2644	2320	rundll32.exe	93
PID 2320 wrote to memory of 2644	2320	rundll32.exe	93
PID 2320 wrote to memory of 2644	2320	rundll32.exe	93
PID 2320 wrote to memory of 1216	2320	rundll32.exe	94
PID 2320 wrote to memory of 1216	2320	rundll32.exe	94
PID 2320 wrote to memory of 1216	2320	rundll32.exe	94
PID 2320 wrote to memory of 3472	2320	rundll32.exe	95
PID 2320 wrote to memory of 3472	2320	rundll32.exe	95
PID 2320 wrote to memory of 3472	2320	rundll32.exe	95

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\242fcce8e3ba9a5e36a1de52a279aea7b1555ceae54b9c786d2e3249a14ecfc9.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\242fcce8e3ba9a5e36a1de52a279aea7b1555ceae54b9c786d2e3249a14ecfc9.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2320
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4044
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.0.1 db-54-bd-0f-79-16
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1664
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.255.255 cf-26-76-79-f0-d4
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1788
- - C:\Windows\SysWOW64\arp.exe
    arp -s 136.243.76.173 e1-08-04-53-20-97
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3908
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.22 3a-62-02-0e-e8-17
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4344
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.251 1e-02-17-5c-66-b6
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1260
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.252 14-e3-37-46-26-a6
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2644
- - C:\Windows\SysWOW64\arp.exe
    arp -s 239.255.255.250 88-d3-40-78-d6-d3
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1216
- - C:\Windows\SysWOW64\arp.exe
    arp -s 255.255.255.255 62-62-d3-74-b7-8f
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3472
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2320 -s 696
    3⤵
    - Program crash
    PID:1096
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2320 -s 812
    3⤵
    - Program crash
    PID:3156

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2320 -ip 2320
1⤵
PID:2568

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2320 -ip 2320
1⤵
PID:3100

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\Common Files\System\symsrv.dll

Filesize
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
memory/2320-1-0x0000000074D99000-0x0000000074D9A000-memory.dmp

Filesize
4KB

Download
memory/2320-3-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2320-7-0x0000000074D90000-0x0000000074DA8000-memory.dmp

Filesize
96KB

Download
memory/2320-10-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download