floxif | f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7

Analysis

max time kernel
133s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
03/03/2025, 18:08

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General

Target

f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.exe
Size

2.7MB
MD5

628a8864536b0d2b121bc4cfcdff98a5
SHA1

224e75f9d56be7711fb1a80e1e9aa0ab857e3b53
SHA256

f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7
SHA512

86e635907e15e77b9fc4c03111ce7de808fb6336d2daa1113aff74869a04b595f524229d23b023b3fc2758d6db2a68447e3ebdb0824dc1c7c1a24366c1ad71c2
SSDEEP

49152:zPE6vXDUOYQMqclLy0wsXuhXabboP4ACQDAknmCQlzI8nd+yw+AZ/WY4N2WwW/KS:LFvXfMFLySXuhXa/oP4ACYAknmCsIpyB

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/0x000c000000023bf9-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023bf9-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4848	f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.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:	f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4848-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x000c000000023bf9-1.dat	upx
behavioral2/memory/4848-13-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
812	4848	WerFault.exe	84
3488	4848	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	f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4848	f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.exe
4848	f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4848	f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4848	f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.exe

C:\Users\Admin\AppData\Local\Temp\f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.exe
"C:\Users\Admin\AppData\Local\Temp\f330b442935ab73cf91375f2ca856e7cf3e6f0e66e3c66633559ac14c064a9c7.exe"
1⤵
- 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 SetWindowsHookEx
PID:4848
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4848 -s 824
  2⤵
  - Program crash
  PID:812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4848 -s 840
  2⤵
  - Program crash
  PID:3488

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4848 -ip 4848
1⤵
PID:4632

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4848 -ip 4848
1⤵
PID:532

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

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/4848-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4848-6-0x0000000000B41000-0x0000000000B42000-memory.dmp

Filesize
4KB

Download
memory/4848-11-0x0000000000B40000-0x0000000000DE8000-memory.dmp

Filesize
2.7MB

Download
memory/4848-13-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download