floxif | e3c948d4015038e51bf88e25b29ef3ed7c58470e5f8bc9f2a9662ff588771958

Analysis

max time kernel
94s
max time network
96s
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 20:40

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General

Target

e3c948d4015038e51bf88e25b29ef3ed7c58470e5f8bc9f2a9662ff588771958N.dll
Size

155KB
MD5

d6d120864a019a35ce72998f306e6f70
SHA1

f6fa3a674b20e76c4ed97df8b514dc02d0a3ab8e
SHA256

e3c948d4015038e51bf88e25b29ef3ed7c58470e5f8bc9f2a9662ff588771958
SHA512

f9585df9f0fcbfb5bab5ed4c1fbc4a7a401744c58a9303d4beb81fc509fe5a8cddecf93dd61649dcb954ac072c50d23c3ea6641a0f636681362f681a77f85e25
SSDEEP

3072:n+1E6Mi7IXJpCRM7pVe1tXtyDg2lQBV+UdE+rECWp7hK4R:njqa7nlEbXcuBV+UdvrEFp7hK4R

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/0x0009000000023cc7-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023cc7-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1868	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023cc7-1.dat	upx
behavioral2/memory/1868-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1868-8-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2444	1868	WerFault.exe	84

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	1868	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3604 wrote to memory of 1868	3604	rundll32.exe	84
PID 3604 wrote to memory of 1868	3604	rundll32.exe	84
PID 3604 wrote to memory of 1868	3604	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e3c948d4015038e51bf88e25b29ef3ed7c58470e5f8bc9f2a9662ff588771958N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3604
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e3c948d4015038e51bf88e25b29ef3ed7c58470e5f8bc9f2a9662ff588771958N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1868
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1868 -s 704
    3⤵
    - Program crash
    PID:2444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1868 -ip 1868
1⤵
PID:2068

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/1868-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1868-5-0x0000000074A31000-0x0000000074A32000-memory.dmp

Filesize
4KB

Download
memory/1868-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1868-7-0x0000000074A30000-0x0000000074A43000-memory.dmp

Filesize
76KB

Download