floxif | dda82bad1edd2769835ac13ec5a55af991734e14bf0acfc27398fad9cfe9c168

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
22-12-2024 02:26

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General

Target

dda82bad1edd2769835ac13ec5a55af991734e14bf0acfc27398fad9cfe9c168N.dll
Size

118KB
MD5

9432ce4f7076955e5773d98733c3c800
SHA1

53341f3db4b6c1722a5ab66de628b468dee24191
SHA256

dda82bad1edd2769835ac13ec5a55af991734e14bf0acfc27398fad9cfe9c168
SHA512

37550cefbf58a75ebb06262be38bde448b440a805338ea5309209c3291e5c08d3170b85856ac8936384a09595d5a6b0426f480d13708e8a16979573deb286832
SSDEEP

3072:GMXfjx+56/TKk6x2lQBV+UdE+rECWp7hKm9bu2:G2jx+5fkcBV+UdvrEFp7hKm9a2

Score

10^/10

floxif backdoor discovery persistence privilege_escalation 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/0x000400000001e432-1.dat	floxif

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000400000001e432-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
928	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000400000001e432-1.dat	upx
behavioral2/memory/928-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/928-7-0x0000000010000000-0x0000000010030000-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

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	928	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 928	1868	rundll32.exe	82
PID 1868 wrote to memory of 928	1868	rundll32.exe	82
PID 1868 wrote to memory of 928	1868	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dda82bad1edd2769835ac13ec5a55af991734e14bf0acfc27398fad9cfe9c168N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1868
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\dda82bad1edd2769835ac13ec5a55af991734e14bf0acfc27398fad9cfe9c168N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Defense Evasion

Credential Access

Discovery

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
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/928-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/928-7-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download