floxif | 042b143909d1b9b0a4592ff29464734421e5c2d06413b1591d00f8b0aa2dcc8a

Analysis

max time kernel
94s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-12-2024 06:44

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General

Target

042b143909d1b9b0a4592ff29464734421e5c2d06413b1591d00f8b0aa2dcc8a.dll
Size

128KB
MD5

d2603a969cd99bed0235676fc814c2cb
SHA1

830bf646a51bab07be898768fd79d60f81470df4
SHA256

042b143909d1b9b0a4592ff29464734421e5c2d06413b1591d00f8b0aa2dcc8a
SHA512

30f16340ffd2404443bb667b76db8f0036f77aa9a8344906333133e0faff5134efc8106b4fcb85d3491e6ec20f336c3bfddfe58fbf015ccf10ea04838553ce99
SSDEEP

3072:0PEJT/XiwKrPYsVaxesQvVqRlkM4OAD/KLznBuB2JA2Bj9B:0PEFiZPYsVPsQvMRlkM4RD/qzMfUZB

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/0x000c000000023b0e-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b0e-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
3920	rundll32.exe

Network Service Discovery 1 TTPs 1 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
4524	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b0e-1.dat	upx
behavioral2/memory/3920-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/3920-11-0x0000000010000000-0x0000000010033000-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

System Location Discovery: System Language Discovery 1 TTPs 2 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3920	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4468 wrote to memory of 3920	4468	rundll32.exe	82
PID 4468 wrote to memory of 3920	4468	rundll32.exe	82
PID 4468 wrote to memory of 3920	4468	rundll32.exe	82
PID 3920 wrote to memory of 4524	3920	rundll32.exe	83
PID 3920 wrote to memory of 4524	3920	rundll32.exe	83
PID 3920 wrote to memory of 4524	3920	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\042b143909d1b9b0a4592ff29464734421e5c2d06413b1591d00f8b0aa2dcc8a.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4468
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\042b143909d1b9b0a4592ff29464734421e5c2d06413b1591d00f8b0aa2dcc8a.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:3920
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4524

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

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
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
memory/3920-4-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/3920-11-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download