floxif | a65d318854d8418f9e6d2c8618dc87bf4b61a1a7b481990a99224f700fb92064

Analysis

max time kernel
93s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-11-2024 04:27

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General

Target

a65d318854d8418f9e6d2c8618dc87bf4b61a1a7b481990a99224f700fb92064.dll
Size

102KB
MD5

b005b29a2552b2399dc59e9042bdd03e
SHA1

556f642e5b835a318faa1c134a1df9baa182b45e
SHA256

a65d318854d8418f9e6d2c8618dc87bf4b61a1a7b481990a99224f700fb92064
SHA512

5842656ef8f20d42932b533b953b6ebdab550b5fe535a9998c012bee4ff4adf4e13a94712cab619856a1c328fb9892b66cb9548935ee281b7afb5280c0cde439
SSDEEP

1536:94EZST99cWATN2s+zheW6BVrqzCJ3bdDY+W14N4NmzWlIA7hKRQtA+:97Znn2lQBV+UdE+rECWp7hKMA+

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

Loads dropped DLL 2 IoCs

Processes:

rundll32.exe

pid process

5116 rundll32.exe
5116 rundll32.exe

pid	process
5116	rundll32.exe
5116	rundll32.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
C:\Program Files\Common Files\System\symsrv.dll	upx
behavioral2/memory/5116-8-0x00000000025A0000-0x00000000025D0000-memory.dmp	upx
behavioral2/memory/5116-6-0x00000000025A0000-0x00000000025D0000-memory.dmp	upx
behavioral2/memory/5116-10-0x00000000025A0000-0x00000000025D0000-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
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 5116 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

description	pid	process
Token: SeDebugPrivilege	5116	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1176 wrote to memory of 5116	1176	rundll32.exe	rundll32.exe
PID 1176 wrote to memory of 5116	1176	rundll32.exe	rundll32.exe
PID 1176 wrote to memory of 5116	1176	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a65d318854d8418f9e6d2c8618dc87bf4b61a1a7b481990a99224f700fb92064.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1176
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a65d318854d8418f9e6d2c8618dc87bf4b61a1a7b481990a99224f700fb92064.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:5116

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
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/5116-0-0x0000000010001000-0x0000000010002000-memory.dmp

Filesize
4KB

Download
memory/5116-8-0x00000000025A0000-0x00000000025D0000-memory.dmp

Filesize
192KB

Download
memory/5116-6-0x00000000025A0000-0x00000000025D0000-memory.dmp

Filesize
192KB

Download
memory/5116-10-0x00000000025A0000-0x00000000025D0000-memory.dmp

Filesize
192KB

Download