floxif | ca8c2a8ccf03fc4eb3c913efd3c4137f8855f5ab205fac9bebfa5802f7b8cc35

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-01-2025 01:49

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General

Target

ca8c2a8ccf03fc4eb3c913efd3c4137f8855f5ab205fac9bebfa5802f7b8cc35N.dll
Size

1.2MB
MD5

a2e91d26504b2f88b0a8f4d65af54ba0
SHA1

ee2344e20c68ad2b9a7c3406b7ec5e1f17dd26e6
SHA256

ca8c2a8ccf03fc4eb3c913efd3c4137f8855f5ab205fac9bebfa5802f7b8cc35
SHA512

a98f8c03726e52f17b8eea6c212cd59f429bbe6bd3c8a81841310c31fc455b5cf9dd52f84d4f582db0aff244db614ad8326001848630f6acda36aa474cab5b83
SSDEEP

24576:IHr9gblIY0ys47fJ3DaBqaeL2k4t1BFAtP6qgN52KeWYJ6NHrEH7u:a9ghtdhh4ttAtP6qs2KeWs6NL

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/0x0018000000023c3b-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0018000000023c3b-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/memory/4736-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x0018000000023c3b-1.dat	upx
behavioral2/memory/4736-6-0x0000000010000000-0x0000000010030000-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

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 1624 wrote to memory of 4736	1624	rundll32.exe	83
PID 1624 wrote to memory of 4736	1624	rundll32.exe	83
PID 1624 wrote to memory of 4736	1624	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ca8c2a8ccf03fc4eb3c913efd3c4137f8855f5ab205fac9bebfa5802f7b8cc35N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1624
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ca8c2a8ccf03fc4eb3c913efd3c4137f8855f5ab205fac9bebfa5802f7b8cc35N.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
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/4736-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4736-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download