floxif | 75100484a2f553707679564e87f2d0bedf04ca2224815a4180379013fefa03e2

Analysis

max time kernel
95s
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
07-01-2025 20:33

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General

Target

75100484a2f553707679564e87f2d0bedf04ca2224815a4180379013fefa03e2N.dll
Size

291KB
MD5

7a3ec22c3da841e277994214c69d5630
SHA1

6add0004cf99eaf2b315b404ca1d14087f90f3b5
SHA256

75100484a2f553707679564e87f2d0bedf04ca2224815a4180379013fefa03e2
SHA512

fea4091fc8ec3d2a810af96f080292cab525d937903d2047b40bde4ff04761844a8e075e649c88a49669b148b9554c4b5db739dd76f5bfe569083ce73b3e0857
SSDEEP

6144:KMEZdi6e9371eTKQxQfsRy26BqbUHYJ4BV+UdvrEFp7hKO:KM2i6eN71euQ2sRDsBjvrEH7F

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/0x000d000000023bb3-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000d000000023bb3-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1360	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000d000000023bb3-1.dat	upx
behavioral2/memory/1360-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1360-8-0x0000000010000000-0x0000000010030000-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
2536	1360	WerFault.exe	82

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	1360	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4560 wrote to memory of 1360	4560	rundll32.exe	82
PID 4560 wrote to memory of 1360	4560	rundll32.exe	82
PID 4560 wrote to memory of 1360	4560	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\75100484a2f553707679564e87f2d0bedf04ca2224815a4180379013fefa03e2N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4560
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\75100484a2f553707679564e87f2d0bedf04ca2224815a4180379013fefa03e2N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1360
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 740
    3⤵
    - Program crash
    PID:2536

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1360 -ip 1360
1⤵
PID:3056

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/1360-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1360-6-0x0000000075120000-0x0000000075154000-memory.dmp

Filesize
208KB

Download
memory/1360-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download