floxif | 43dfb427b3097ba5509a3cde7ab5c30b9e80c60eebd597c93d7b0ef0c65b4e4b

Analysis

max time kernel
97s
max time network
99s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2024 17:37

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General

Target

43dfb427b3097ba5509a3cde7ab5c30b9e80c60eebd597c93d7b0ef0c65b4e4bN.dll
Size

417KB
MD5

d132920bd10849620f86be0c40c347b0
SHA1

1dd9b34cf9c84a0ba75314fc7f5072510a26b0ee
SHA256

43dfb427b3097ba5509a3cde7ab5c30b9e80c60eebd597c93d7b0ef0c65b4e4b
SHA512

96b0db9738843fb3deb8c8a5f60fd3fcfbf18cc153d43a4af4cc76b35f6a61754fd04fd71428955e743b0d22e1fc040d15310f0c0d688ca85ebabc639011eda6
SSDEEP

12288:3pCfP6QBI+mp+sIjWo+JDOTSwYghfi+eNH9rIWBjvrEH7N:3pCfP6ASp+sIjWoeDO+nn9rnrEH7N

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/0x000c000000023b9b-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b9b-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
3620	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3620-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x000c000000023b9b-1.dat	upx
behavioral2/memory/3620-8-0x0000000010000000-0x0000000010030000-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
3996	3620	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	3620	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4640 wrote to memory of 3620	4640	rundll32.exe	83
PID 4640 wrote to memory of 3620	4640	rundll32.exe	83
PID 4640 wrote to memory of 3620	4640	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\43dfb427b3097ba5509a3cde7ab5c30b9e80c60eebd597c93d7b0ef0c65b4e4bN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4640
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\43dfb427b3097ba5509a3cde7ab5c30b9e80c60eebd597c93d7b0ef0c65b4e4bN.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:3620
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3620 -s 700
    3⤵
    - Program crash
    PID:3996

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3620 -ip 3620
1⤵
PID:324

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

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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/3620-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3620-6-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/3620-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download