floxif | 3862c25a68b52fe45fff9b448a8e05b7797f4f479ac4680990364b14366fa701

Analysis

max time kernel
118s
max time network
121s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
01-01-2025 21:52

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

3862c25a68b52fe45fff9b448a8e05b7797f4f479ac4680990364b14366fa701.dll
Size

137KB
MD5

51adf76cd03a67aab0d2f04ae53bc8f6
SHA1

dcb02d28d18d33a74a7bbb17e4c3b6bde92fdb8b
SHA256

3862c25a68b52fe45fff9b448a8e05b7797f4f479ac4680990364b14366fa701
SHA512

736d671b6e296d89446a462c563029348bf7f83c5c0056cacff0d283bba22025e61c9c892f103f07fe74cfc974fb2afd0771d27ddd20e48868406a85c7481675
SSDEEP

3072:2fKSaV0gkOpanB3ai2lQBV+UdE+rECWp7hKyZcF:2CSesOUnBxBV+UdvrEFp7hK/

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
behavioral1/files/0x000c000000012280-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000c000000012280-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2364	regsvr32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000c000000012280-1.dat	upx
behavioral1/memory/2364-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2364-5-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	regsvr32.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	regsvr32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{23170F69-40C1-278A-1000-000100020000}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{23170F69-40C1-278A-1000-000100020000}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\3862c25a68b52fe45fff9b448a8e05b7797f4f479ac4680990364b14366fa701.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{23170F69-40C1-278A-1000-000100020000}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{23170F69-40C1-278A-1000-000100020000}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{23170F69-40C1-278A-1000-000100020000}\ = "7-Zip Shell Extension"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 2364	2176	regsvr32.exe	30
PID 2176 wrote to memory of 2364	2176	regsvr32.exe	30
PID 2176 wrote to memory of 2364	2176	regsvr32.exe	30
PID 2176 wrote to memory of 2364	2176	regsvr32.exe	30
PID 2176 wrote to memory of 2364	2176	regsvr32.exe	30
PID 2176 wrote to memory of 2364	2176	regsvr32.exe	30
PID 2176 wrote to memory of 2364	2176	regsvr32.exe	30

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\3862c25a68b52fe45fff9b448a8e05b7797f4f479ac4680990364b14366fa701.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\3862c25a68b52fe45fff9b448a8e05b7797f4f479ac4680990364b14366fa701.dll
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:2364

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

Loading Replay Monitor...

Downloads

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/2364-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2364-5-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download