floxif | 6422c665c0f6a6c590800a2340356efd3edbfc077d432dc1388dbb68ee041db1

Analysis

max time kernel
95s
max time network
135s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29-12-2024 23:29

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General

Target

6422c665c0f6a6c590800a2340356efd3edbfc077d432dc1388dbb68ee041db1.dll
Size

156KB
MD5

e72fe046e8cd0e9fffa83a098ec8e163
SHA1

4196aa603df872d6ca9ed55834f5e6b6ad86292d
SHA256

6422c665c0f6a6c590800a2340356efd3edbfc077d432dc1388dbb68ee041db1
SHA512

b4bc4b27d7845811ba99f41867e006dfe4a6ca61a04f4fcb0d88e6742576d0999b9e1aa7fea1de1919f96091611420985c67cee3738bed7ea91eb04d64bbba8d
SSDEEP

3072:kiyCsqQj5Jf22lQBV+UdE+rECWp7hKSLA:kiykQABV+UdvrEFp7hK9

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/0x000b000000023bc3-1.dat	floxif

Blocklisted process makes network request 1 IoCs

flow	pid	Process
11	4940	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000b000000023bc3-1.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
4940	rundll32.exe
4940	rundll32.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\e:	rundll32.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000b000000023bc3-1.dat	upx
behavioral2/memory/4940-7-0x0000000000620000-0x0000000000650000-memory.dmp	upx
behavioral2/memory/4940-5-0x0000000000620000-0x0000000000650000-memory.dmp	upx
behavioral2/memory/4940-15-0x0000000000620000-0x0000000000650000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
636	4940	WerFault.exe	82

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 behavior: EnumeratesProcesses 2 IoCs

pid	Process
4940	rundll32.exe
4940	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4940	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3480 wrote to memory of 4940	3480	rundll32.exe	82
PID 3480 wrote to memory of 4940	3480	rundll32.exe	82
PID 3480 wrote to memory of 4940	3480	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6422c665c0f6a6c590800a2340356efd3edbfc077d432dc1388dbb68ee041db1.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3480
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\6422c665c0f6a6c590800a2340356efd3edbfc077d432dc1388dbb68ee041db1.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Enumerates connected drives
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4940
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4940 -s 576
    3⤵
    - Program crash
    PID:636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4940 -ip 4940
1⤵
PID:3236

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

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
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/4940-7-0x0000000000620000-0x0000000000650000-memory.dmp

Filesize
192KB

Download
memory/4940-5-0x0000000000620000-0x0000000000650000-memory.dmp

Filesize
192KB

Download
memory/4940-8-0x0000000010001000-0x0000000010002000-memory.dmp

Filesize
4KB

Download
memory/4940-15-0x0000000000620000-0x0000000000650000-memory.dmp

Filesize
192KB

Download