floxif | 606f8c8ea104a2f951b5fe25e428e122f8bdfbe3e720dd35653e50884e080538

Analysis

max time kernel
92s
max time network
100s
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 05:28

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General

Target

606f8c8ea104a2f951b5fe25e428e122f8bdfbe3e720dd35653e50884e080538N.dll
Size

3.2MB
MD5

e4da9c51ff8bb003cf7e5f459ade4be0
SHA1

3cf3c858e737f036b449e84cf74f8344aac8f37f
SHA256

606f8c8ea104a2f951b5fe25e428e122f8bdfbe3e720dd35653e50884e080538
SHA512

53a1641f39e039aecfc362df2a0e4896ab8a083499074e6182f4aeacb79057aee3688cbf2ff4549b388d68a209e02494a568a14839a97061ee0c57c85c0685ff
SSDEEP

98304:7k1098KRiJeU+4+Yo5KETMpyxKFckz6dPTYU+:pKKRKmNgEiy5tsf

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/0x0009000000023b01-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023b01-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2584	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023b01-1.dat	upx
behavioral2/memory/2584-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/2584-6-0x0000000010000000-0x0000000010033000-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 1 IoCs

pid	pid_target	Process	procid_target
3888	2584	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 WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1200 wrote to memory of 2584	1200	rundll32.exe	83
PID 1200 wrote to memory of 2584	1200	rundll32.exe	83
PID 1200 wrote to memory of 2584	1200	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\606f8c8ea104a2f951b5fe25e428e122f8bdfbe3e720dd35653e50884e080538N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\606f8c8ea104a2f951b5fe25e428e122f8bdfbe3e720dd35653e50884e080538N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  PID:2584
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2584 -s 576
    3⤵
    - Program crash
    PID:3888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 2584 -ip 2584
1⤵
PID:3752

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

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

Filesize
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
memory/2584-4-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2584-6-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download