floxif | f8c3b043af4a5e5ba484c366bb0bcf643b265cd7edcf1d41d5d069d02a29ad57

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
12-12-2024 05:01

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General

Target

f8c3b043af4a5e5ba484c366bb0bcf643b265cd7edcf1d41d5d069d02a29ad57.dll
Size

1.4MB
MD5

f092acde702fdacf415d10509eef8701
SHA1

6c5b8fa2d16c61bd0bc5bc7f73db00a790f208f8
SHA256

f8c3b043af4a5e5ba484c366bb0bcf643b265cd7edcf1d41d5d069d02a29ad57
SHA512

a30dea6055d5a9560343984e7189ce1fce0ce8b6cf352f63a4fbf8beaca614fb273b1b3399ddf4c2d92d0bebcff025022e3849d3d9a54fb04411c9e4c160b0b1
SSDEEP

24576:jLsgtxjqgr9vP0ofHXacAZdevw5dpow8OyqDEsTrAci8RhV6P2s3JkhbxLervrEd:jljwcKMvw/pocBHTvi8RhV6P2s3KxeI

Score

10^/10

floxif backdoor discovery persistence privilege_escalation 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/0x000c000000023b14-1.dat	floxif

Blocklisted process makes network request 2 IoCs

flow	pid	Process
15	2856	rundll32.exe
21	2856	rundll32.exe

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b14-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2856	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 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2856-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x000c000000023b14-1.dat	upx
behavioral2/memory/2856-9-0x0000000010000000-0x0000000010030000-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

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
2856	rundll32.exe
2856	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2856	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4796 wrote to memory of 2856	4796	rundll32.exe	83
PID 4796 wrote to memory of 2856	4796	rundll32.exe	83
PID 4796 wrote to memory of 2856	4796	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f8c3b043af4a5e5ba484c366bb0bcf643b265cd7edcf1d41d5d069d02a29ad57.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f8c3b043af4a5e5ba484c366bb0bcf643b265cd7edcf1d41d5d069d02a29ad57.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:2856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

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

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/2856-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2856-9-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download