floxif | 94d750bf4a5aa36cad64a0bd5578fc3ac361881f2f71c92428a966c33ef44b5c

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-01-2025 05:37

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General

Target

94d750bf4a5aa36cad64a0bd5578fc3ac361881f2f71c92428a966c33ef44b5cN.dll
Size

2.2MB
MD5

93c5d921e94987a9ef78ab04d0619cf0
SHA1

b113be8e3ce3289029a931e2fe2aaac6a67a74a2
SHA256

94d750bf4a5aa36cad64a0bd5578fc3ac361881f2f71c92428a966c33ef44b5c
SHA512

aa4fd513987846703a73ca29107994cb4be8dc7f36a37bfca5b69da384a2439cf65f115fe182b434bd5cf32077e90e25d94b77caa08913cf547b913df2eac745
SSDEEP

24576:iHi28kumAEyLmmLZi6ZEff7P2jwLrxnw2k6RzZeqqZVWBMgIu6G9drFb6cyioQKG:ImLZ6ffajSJVpZYZsBf19droti21ql

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/0x000a000000023c01-1.dat	floxif

Blocklisted process makes network request 3 IoCs

flow	pid	Process
15	452	rundll32.exe
18	452	rundll32.exe
21	452	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/0x000a000000023c01-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
452	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

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
4424	arp.exe
2936	arp.exe
3468	arp.exe
3840	arp.exe
2436	arp.exe
1792	arp.exe
3884	arp.exe
3652	arp.exe
3596	arp.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000023c01-1.dat	upx
behavioral2/memory/452-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/452-10-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/452-13-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/452-17-0x0000000010000000-0x0000000010033000-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 11 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	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
452	rundll32.exe
452	rundll32.exe
452	rundll32.exe
452	rundll32.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
656	Process not Found
656	Process not Found

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	452	rundll32.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 3904 wrote to memory of 452	3904	rundll32.exe	82
PID 3904 wrote to memory of 452	3904	rundll32.exe	82
PID 3904 wrote to memory of 452	3904	rundll32.exe	82
PID 452 wrote to memory of 1792	452	rundll32.exe	83
PID 452 wrote to memory of 1792	452	rundll32.exe	83
PID 452 wrote to memory of 1792	452	rundll32.exe	83
PID 452 wrote to memory of 4424	452	rundll32.exe	85
PID 452 wrote to memory of 4424	452	rundll32.exe	85
PID 452 wrote to memory of 4424	452	rundll32.exe	85
PID 452 wrote to memory of 2936	452	rundll32.exe	86
PID 452 wrote to memory of 2936	452	rundll32.exe	86
PID 452 wrote to memory of 2936	452	rundll32.exe	86
PID 452 wrote to memory of 3884	452	rundll32.exe	87
PID 452 wrote to memory of 3884	452	rundll32.exe	87
PID 452 wrote to memory of 3884	452	rundll32.exe	87
PID 452 wrote to memory of 3652	452	rundll32.exe	88
PID 452 wrote to memory of 3652	452	rundll32.exe	88
PID 452 wrote to memory of 3652	452	rundll32.exe	88
PID 452 wrote to memory of 3468	452	rundll32.exe	89
PID 452 wrote to memory of 3468	452	rundll32.exe	89
PID 452 wrote to memory of 3468	452	rundll32.exe	89
PID 452 wrote to memory of 3596	452	rundll32.exe	90
PID 452 wrote to memory of 3596	452	rundll32.exe	90
PID 452 wrote to memory of 3596	452	rundll32.exe	90
PID 452 wrote to memory of 3840	452	rundll32.exe	91
PID 452 wrote to memory of 3840	452	rundll32.exe	91
PID 452 wrote to memory of 3840	452	rundll32.exe	91
PID 452 wrote to memory of 2436	452	rundll32.exe	92
PID 452 wrote to memory of 2436	452	rundll32.exe	92
PID 452 wrote to memory of 2436	452	rundll32.exe	92
PID 452 wrote to memory of 388	452	rundll32.exe	101
PID 452 wrote to memory of 388	452	rundll32.exe	101
PID 452 wrote to memory of 388	452	rundll32.exe	101

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\94d750bf4a5aa36cad64a0bd5578fc3ac361881f2f71c92428a966c33ef44b5cN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3904
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\94d750bf4a5aa36cad64a0bd5578fc3ac361881f2f71c92428a966c33ef44b5cN.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
  - Suspicious use of WriteProcessMemory
  PID:452
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1792
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.0.1 8c-76-94-68-36-50
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4424
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.255.255 02-3b-72-57-7a-4b
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2936
- - C:\Windows\SysWOW64\arp.exe
    arp -s 136.243.76.170 a6-78-50-72-30-f6
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3884
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.22 c1-f0-32-d8-eb-5c
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3652
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.251 90-48-6c-41-d4-dc
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3468
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.252 54-25-14-51-b3-50
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3596
- - C:\Windows\SysWOW64\arp.exe
    arp -s 239.255.255.250 11-c8-01-1e-9b-54
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3840
- - C:\Windows\SysWOW64\arp.exe
    arp -s 255.255.255.255 f7-69-78-72-a8-86
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2436
- - C:\Windows\SysWOW64\arp.exe
    arp -d
    3⤵
    - System Location Discovery: System Language Discovery
    PID:388

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

Network Service Discovery

T1046

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
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
memory/452-4-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/452-5-0x00000000751E4000-0x00000000751E5000-memory.dmp

Filesize
4KB

Download
memory/452-6-0x00000000751E0000-0x000000007543C000-memory.dmp

Filesize
2.4MB

Download
memory/452-10-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/452-11-0x00000000751E0000-0x000000007543C000-memory.dmp

Filesize
2.4MB

Download
memory/452-13-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/452-12-0x00000000751E0000-0x000000007543C000-memory.dmp

Filesize
2.4MB

Download
memory/452-17-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download