floxif | 198d8757e1d9288b597f9b2f12d75f7c3bf703055c684d08a499e222516a6511

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-01-2025 20:17

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General

Target

198d8757e1d9288b597f9b2f12d75f7c3bf703055c684d08a499e222516a6511.dll
Size

183KB
MD5

b61bd181a51ede5958e78ea2a37a9b1c
SHA1

7a4f9fb722ac89b57b7215a72a50a3bb26541be3
SHA256

198d8757e1d9288b597f9b2f12d75f7c3bf703055c684d08a499e222516a6511
SHA512

d4b2099ed022177749650de9bd45fefed88487c742a4750de5f1c5c3f8e3d6117e425a54e24847b76a6799f2e4a8b9bfa7e8338778797734ca7ea157c55c71b1
SSDEEP

3072:6G1eI8tNqL7+LbNQDCVyymQXH5SjjJ2lQBV+UdE+rECWp7hKXOn:6GsltA2YyXX5SNBV+UdvrEFp7hKXOn

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
behavioral1/files/0x000b000000012253-1.dat	floxif

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	2552	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000b000000012253-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2552	rundll32.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\e:	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000b000000012253-1.dat	upx
behavioral1/memory/2552-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2552-6-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	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

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

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2552	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2552	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30
PID 2544 wrote to memory of 2552	2544	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\198d8757e1d9288b597f9b2f12d75f7c3bf703055c684d08a499e222516a6511.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\198d8757e1d9288b597f9b2f12d75f7c3bf703055c684d08a499e222516a6511.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Enumerates connected drives
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2552

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/2552-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2552-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download