floxif | 321c4e5271fd57741cbe669ad9476a515d3542351a08ee7e5a954fb1d0f3cf0c

Analysis

max time kernel
141s
max time network
120s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
23/07/2024, 20:21

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General

Target

321c4e5271fd57741cbe669ad9476a515d3542351a08ee7e5a954fb1d0f3cf0c.dll
Size

105KB
MD5

6fe2bf366af0e0eae1a8b6a360300f6f
SHA1

48f86209b167dafc4ab958450e8a6d159df01834
SHA256

321c4e5271fd57741cbe669ad9476a515d3542351a08ee7e5a954fb1d0f3cf0c
SHA512

203ea20d60f1b5958dec8875cb923e752d567e92d7e34f4cedb8643ef6ab0612f18a818dcaf519208975031146edb7ae6fcfc3fbb6a4d099bf67d87908d6f065
SSDEEP

3072:lFK5qr02FtRSwAk2lQBV+UdE+rECWp7hKLXLo/:lF6qr02FSwACBV+UdvrEFp7hKTM/

Score

10^/10

floxif backdoor discovery 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

resource	yara_rule
behavioral1/files/0x000f000000013423-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000f000000013423-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1892	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000f000000013423-1.dat	upx
behavioral1/memory/1892-3-0x0000000000250000-0x0000000000280000-memory.dmp	upx
behavioral1/memory/1892-6-0x0000000000250000-0x0000000000280000-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
2284	1892	WerFault.exe	31

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	1892	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2316 wrote to memory of 1892	2316	rundll32.exe	31
PID 2316 wrote to memory of 1892	2316	rundll32.exe	31
PID 2316 wrote to memory of 1892	2316	rundll32.exe	31
PID 2316 wrote to memory of 1892	2316	rundll32.exe	31
PID 2316 wrote to memory of 1892	2316	rundll32.exe	31
PID 2316 wrote to memory of 1892	2316	rundll32.exe	31
PID 2316 wrote to memory of 1892	2316	rundll32.exe	31
PID 1892 wrote to memory of 2284	1892	rundll32.exe	32
PID 1892 wrote to memory of 2284	1892	rundll32.exe	32
PID 1892 wrote to memory of 2284	1892	rundll32.exe	32
PID 1892 wrote to memory of 2284	1892	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\321c4e5271fd57741cbe669ad9476a515d3542351a08ee7e5a954fb1d0f3cf0c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\321c4e5271fd57741cbe669ad9476a515d3542351a08ee7e5a954fb1d0f3cf0c.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1892
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1892 -s 308
    3⤵
    - Program crash
    PID:2284

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

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/1892-3-0x0000000000250000-0x0000000000280000-memory.dmp

Filesize
192KB

Download
memory/1892-6-0x0000000000250000-0x0000000000280000-memory.dmp

Filesize
192KB

Download
memory/1892-5-0x0000000010000000-0x0000000010063000-memory.dmp

Filesize
396KB

Download