floxif | 5a61ad4df1923874a9a79ab0c775e2d4744ebb687677679501a654758aa0bdde

Analysis

max time kernel
106s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-12-2024 23:59

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General

Target

5a61ad4df1923874a9a79ab0c775e2d4744ebb687677679501a654758aa0bdde.dll
Size

1.5MB
MD5

ef97b824d8b25ef530d7de2626155503
SHA1

295dadee9759987d419df1febf3e002d6384f09b
SHA256

5a61ad4df1923874a9a79ab0c775e2d4744ebb687677679501a654758aa0bdde
SHA512

f45b006c9650956d1c98fac4d2c1b71bd57baca64e9a6331191d0b6d7f80f872babcf71fe9df259570528a7a496d397414a2d4a6764ea210e25ee9f16cee555e
SSDEEP

24576:xmS10lVcjLvu1Y7H7jBRO9Be4eijhT4XldSt5Y1qSMRGJ/qofN:xfVBoeihT4rSt5A71qo

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/0x000c000000023b27-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b27-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4736	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b27-1.dat	upx
behavioral2/memory/4736-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/4736-6-0x0000000010000000-0x0000000010033000-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

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	4736	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4656 wrote to memory of 4736	4656	rundll32.exe	83
PID 4656 wrote to memory of 4736	4656	rundll32.exe	83
PID 4656 wrote to memory of 4736	4656	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5a61ad4df1923874a9a79ab0c775e2d4744ebb687677679501a654758aa0bdde.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4656
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\5a61ad4df1923874a9a79ab0c775e2d4744ebb687677679501a654758aa0bdde.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4736

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
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
memory/4736-4-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/4736-6-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download