floxif | 63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240db

General

Target

63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
Size

1.7MB
MD5

fe1309f1f33d4fc8d2d190c307e71490
SHA1

5b7e19b245da1f9cafa322e4c433d0e65c0cb6cd
SHA256

63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240db
SHA512

12351b6d24ffc0c202a0dd2d4ee00ec1de3e33c5351d586c303b789a656a3f4f328839e13ca4a2332975ae94117f318771b7e02221bace644b92c6f525e9845a
SSDEEP

24576:KjlJdSTTnJOpyTACBeccWvEQS3/M9DLwOSyjaWEYdLCDWMqDloROYy0erBftrEHD:nTVUWvEt3URPjkALCDWM+OkY6c

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/0x000d000000023b0d-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000d000000023b0d-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
5012	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000d000000023b0d-1.dat	upx
behavioral2/memory/5012-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/5012-10-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1236	5012	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	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe

Modifies registry class 10 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InstallCreator.Settings	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\InstallCreator.Settings\ = "Install Creator Project"	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InstallCreator.Settings\shell	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InstallCreator.Settings\shell\open	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InstallCreator.Settings\shell\open\command	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\InstallCreator.Settings\shell\open\command\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\63961B~1.EXE \"%1\""	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.iit	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.iit\ = "InstallCreator.Settings"	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InstallCreator.Settings\DefaultIcon	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\InstallCreator.Settings\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\63961B~1.EXE,1"	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5012	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5012	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
5012	63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe

C:\Users\Admin\AppData\Local\Temp\63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe
"C:\Users\Admin\AppData\Local\Temp\63961bc6dfdf5c5114b368249d90d2a7b16c9d6368138f2ac8d7b68ef48240dbN.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:5012
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 1184
  2⤵
  - Program crash
  PID:1236

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 5012 -ip 5012
1⤵
PID:2016

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/5012-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/5012-8-0x0000000000407000-0x000000000040A000-memory.dmp

Filesize
12KB

Download
memory/5012-10-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing