floxif | 17e5e41f962516b0e3bd6a7cd40eeca80a64fd2a3ce5b262008f76ed3ec6918e

Analysis

max time kernel
93s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-11-2024 20:33

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General

Target

17e5e41f962516b0e3bd6a7cd40eeca80a64fd2a3ce5b262008f76ed3ec6918e.dll
Size

169KB
MD5

de67266dbce1a35b430e05711be55a16
SHA1

901ab7d385d2c31614fd033621c6594478ad2449
SHA256

17e5e41f962516b0e3bd6a7cd40eeca80a64fd2a3ce5b262008f76ed3ec6918e
SHA512

f04fd8117e08bb9c4ca8157fcf03efe25e7aa508dafa9e853b12bf7a0ff8966ef967074e905659796c28bc464a50fe7e91b68adab7ade7e4b528e5b6fd879e89
SSDEEP

3072:/MxIfi7eGI+/oCc2lQBV+UdE+rECWp7hKpnQo:/bivBx6BV+UdvrEFp7hKp/

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

Processes:

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

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 1 IoCs

Processes:

rundll32.exe

pid process

1104 rundll32.exe

pid	process
1104	rundll32.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1104-2-0x0000000010000000-0x0000000010030000-memory.dmp	upx
C:\Program Files\Common Files\System\symsrv.dll	upx
behavioral2/memory/1104-6-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File created C:\Program Files\Common Files\System\symsrv.dll rundll32.exe
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

Processes:

rundll32.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 1104 rundll32.exe

description	ioc	process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

description	pid	process
Token: SeDebugPrivilege	1104	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1608 wrote to memory of 1104	1608	rundll32.exe	rundll32.exe
PID 1608 wrote to memory of 1104	1608	rundll32.exe	rundll32.exe
PID 1608 wrote to memory of 1104	1608	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\17e5e41f962516b0e3bd6a7cd40eeca80a64fd2a3ce5b262008f76ed3ec6918e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1608
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\17e5e41f962516b0e3bd6a7cd40eeca80a64fd2a3ce5b262008f76ed3ec6918e.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1104

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/1104-2-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1104-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download