floxif | dc7f7ab4d34f0589de49de7964aaf7c83d8c79f53daccdec7613e8afd85d89e2

Analysis

max time kernel
95s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2024 17:27

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General

Target

dc7f7ab4d34f0589de49de7964aaf7c83d8c79f53daccdec7613e8afd85d89e2N.dll
Size

109KB
MD5

519d8da70b6fb026471ccac67c9f2240
SHA1

cb529f7ff7013fd139ac0ee230d01a395bb3511a
SHA256

dc7f7ab4d34f0589de49de7964aaf7c83d8c79f53daccdec7613e8afd85d89e2
SHA512

8a66dd30d65af0e6412a923d2559c5c6c5abbb10456854810ccec348dbb80b0fbd7dbd00907bd296fc71029ebd8f358d2b076d0650bc1a7af9837afce3dc1e7b
SSDEEP

3072:byLIALaZaLAV2lQBV+UdE+rECWp7hKJri:bgIAcasBV+UdvrEFp7hKJri

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/0x0008000000023c90-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0008000000023c90-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
856	regsvr32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0008000000023c90-1.dat	upx
behavioral2/memory/856-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/856-5-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	regsvr32.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	regsvr32.exe

Modifies registry class 9 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\A3d\ = "A3d Object"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\A3d\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D8F1EEE0-F634-11CF-8700-00A0245D918B}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D8F1EEE0-F634-11CF-8700-00A0245D918B}\InprocServer32\ = "a3d.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\A3d	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\A3d\CLSID\ = "{D8F1EEE0-F634-11CF-8700-00A0245D918B}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D8F1EEE0-F634-11CF-8700-00A0245D918B}\ = "A3d Object"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D8F1EEE0-F634-11CF-8700-00A0245D918B}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D8F1EEE0-F634-11CF-8700-00A0245D918B}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	856	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 856	2524	regsvr32.exe	83
PID 2524 wrote to memory of 856	2524	regsvr32.exe	83
PID 2524 wrote to memory of 856	2524	regsvr32.exe	83

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\dc7f7ab4d34f0589de49de7964aaf7c83d8c79f53daccdec7613e8afd85d89e2N.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\dc7f7ab4d34f0589de49de7964aaf7c83d8c79f53daccdec7613e8afd85d89e2N.dll
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  PID:856

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/856-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/856-5-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download