floxif | 356204c704b0d989d73855b9125673895fc06158a54b2fa2dd0a751b0c5101d6

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02/09/2024, 20:27

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
356204c704b0d989d73855b9125673895fc06158a54b2fa2dd0a751b0c5101d6.dll
Size 1.3MB
Sample240902-y8m6ssweql
SHA256 356204c704b0d989d73855b9125673895fc06158a54b2fa2dd0a751b0c5101d6
MD5 bd674dc51eacbb32b20a06a763173d96
SHA1 a6968dc5a752a0330ab7fd563788ab0e96a4500d
SHA512 58f568fbcfea590ca9450efd544d1e26ffcc5e3fd20814130c1a4afd171429a62d7bfdc8b55599115ff00ecc60ad6a686b43e209b298b128924b65eb7b9b125f
SSDEEP 24576:corhrGbk0PpCcnCKZrhzuSWTAEn/Rg7T2NX8nYRZR21omrEH7o:bcbwKrjWTAD7OKYRZQZ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

floxif backdoor discovery persistence privilege_escalation trojan upx

Malware Config

Signatures

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/0x000900000002342d-1.dat	floxif

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/0x000900000002342d-1.dat	acprotect

Loads dropped DLL 3 IoCs

pid	Process
4672	rundll32.exe
4544	WerFault.exe
3620	WerFault.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000900000002342d-1.dat	upx
behavioral2/memory/4672-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4672-10-0x0000000010000000-0x0000000010030000-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
3620	4672	WerFault.exe	83

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	4672	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4440 wrote to memory of 4672	4440	rundll32.exe	83
PID 4440 wrote to memory of 4672	4440	rundll32.exe	83
PID 4440 wrote to memory of 4672	4440	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\356204c704b0d989d73855b9125673895fc06158a54b2fa2dd0a751b0c5101d6.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4440
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\356204c704b0d989d73855b9125673895fc06158a54b2fa2dd0a751b0c5101d6.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4672
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4672 -s 736
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:3620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4672 -ip 4672
1⤵
- Loads dropped DLL
PID:4544

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

symsrv.dll

Path C:\Program Files\Common Files\System\symsrv.dll
Size 67KB
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab
SSDEEP 1536:YjV8y93KQpFQmPLRk7G50zy/riF12jvRyo0hQk7ZL:c8y93KQjy7G55riF1cMo03V
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4672-4-0x0000000010000000-0x0000000010030000-memory.dmp

Download

memory/4672-10-0x0000000010000000-0x0000000010030000-memory.dmp

Download

memory/4672-8-0x0000000010220000-0x000000001036A000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads