floxif | 3e45ff1f6106ec9c03f087a850242e2c15204f58211d5a46fdf865339b30e267

Analysis

max time kernel
88s
max time network
16s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
30-10-2024 14:12

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General

Target

3e45ff1f6106ec9c03f087a850242e2c15204f58211d5a46fdf865339b30e267N.dll
Size

197KB
MD5

738367c8e98dce7961442cd6bc28bb20
SHA1

da85364982841c6785e77ab4043a305013b6c985
SHA256

3e45ff1f6106ec9c03f087a850242e2c15204f58211d5a46fdf865339b30e267
SHA512

d4c2aa7370180ad31601ab55af0e112cab3c23158f0fed24e3981d2f1bca5debfc14f8d6243698d4937cdacf508ab4de276a84f267d25cc94d8751e9169b8c8e
SSDEEP

6144:Vy9B1eErXazPz/kKsQvMRlkM4RD/qzMfUnz:89B1euOLfMRGM4h/qofyz

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

Processes:

resource	yara_rule
\Program Files\Common Files\System\symsrv.dll	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

Processes:

resource	yara_rule
\Program Files\Common Files\System\symsrv.dll	acprotect

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

2100 rundll32.exe

pid	process
2100	rundll32.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
\Program Files\Common Files\System\symsrv.dll	upx
behavioral1/memory/2100-3-0x00000000001E0000-0x0000000000213000-memory.dmp	upx
behavioral1/memory/2100-5-0x00000000001E0000-0x0000000000213000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File created C:\Program Files\Common Files\System\symsrv.dll rundll32.exe
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

Processes:

rundll32.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe

description	ioc	process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 2316 wrote to memory of 2100	2316	rundll32.exe	rundll32.exe
PID 2316 wrote to memory of 2100	2316	rundll32.exe	rundll32.exe
PID 2316 wrote to memory of 2100	2316	rundll32.exe	rundll32.exe
PID 2316 wrote to memory of 2100	2316	rundll32.exe	rundll32.exe
PID 2316 wrote to memory of 2100	2316	rundll32.exe	rundll32.exe
PID 2316 wrote to memory of 2100	2316	rundll32.exe	rundll32.exe
PID 2316 wrote to memory of 2100	2316	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3e45ff1f6106ec9c03f087a850242e2c15204f58211d5a46fdf865339b30e267N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2316

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3e45ff1f6106ec9c03f087a850242e2c15204f58211d5a46fdf865339b30e267N.dll,#1
2⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:2100

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

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Downloads

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

Filesize
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
memory/2100-3-0x00000000001E0000-0x0000000000213000-memory.dmp

Filesize
204KB

Download
memory/2100-5-0x00000000001E0000-0x0000000000213000-memory.dmp

Filesize
204KB

Download