floxif | 351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534

Analysis

max time kernel
92s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
05-07-2024 03:46

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General

Target

351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe
Size

290KB
MD5

0d751453de328b964f9c6548c25e4d80
SHA1

8393d331a899041b8322de33d3cf4c124075fa82
SHA256

351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534
SHA512

9b2ac2675b58e134cdcf226fa52bcf8bb69de7f20784242b86df92eb5a8c04f07bbc206f788512ba1e25714d07bf253cbcb0bcea0e2d2cea1795324c606e1d71
SSDEEP

6144:Y4EUXfbN0SblTPZSqeRpyH5eTbze6N5wW3eWzbkVgTBV+UdvrEFp7hK+2:Y4EWbm+PZKOH5Sze6N5wW3eW3lBjvrEA

Score

10^/10

floxif backdoor 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

Processes:

resource yara_rule

C:\Program Files\Common Files\System\symsrv.dll 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.

Processes:

resource yara_rule

C:\Program Files\Common Files\System\symsrv.dll acprotect
Loads dropped DLL 3 IoCs

Processes:

351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exeWerFault.exeWerFault.exe

pid process

3544 351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe
592 WerFault.exe
2180 WerFault.exe

resource	yara_rule
C:\Program Files\Common Files\System\symsrv.dll	floxif

resource	yara_rule
C:\Program Files\Common Files\System\symsrv.dll	acprotect

pid	process
3544	351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe
592	WerFault.exe
2180	WerFault.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
C:\Program Files\Common Files\System\symsrv.dll	upx
behavioral2/memory/3544-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3544-11-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

Processes:

351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe

description ioc process

File created C:\Program Files\Common Files\System\symsrv.dll 351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2180 3544 WerFault.exe 351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe

description pid process

Token: SeDebugPrivilege 3544 351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe

description	ioc	process
File created	C:\Program Files\Common Files\System\symsrv.dll	351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe

pid	pid_target	process	target process
2180	3544	WerFault.exe	351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe

description	pid	process
Token: SeDebugPrivilege	3544	351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe

C:\Users\Admin\AppData\Local\Temp\351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe
"C:\Users\Admin\AppData\Local\Temp\351005b4b75c99a659012947472d1611fb149633c97d64b51cf81e451b063534.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:3544

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3544 -s 552
2⤵
- Loads dropped DLL
- Program crash
PID:2180

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3544 -ip 3544
1⤵
- Loads dropped DLL
PID:592

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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/3544-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3544-6-0x0000000000C93000-0x0000000000C94000-memory.dmp

Filesize
4KB

Download
memory/3544-11-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3544-9-0x0000000000C90000-0x0000000000E5F000-memory.dmp

Filesize
1.8MB

Download