floxif | ee6b8de5d3ca5d6b7abffd0017b4a1514b1c88c61da62408f5ff1333396fcbea

Analysis

max time kernel
92s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-12-2024 18:01

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General

Target

ee6b8de5d3ca5d6b7abffd0017b4a1514b1c88c61da62408f5ff1333396fcbea.dll
Size

1.6MB
MD5

e210bcdf2037089de130d5f64a1808fe
SHA1

372f5eebd1aa9ae32121563e4a4f831b6ac24bcf
SHA256

ee6b8de5d3ca5d6b7abffd0017b4a1514b1c88c61da62408f5ff1333396fcbea
SHA512

d2720e77535d59cbb11f8c4de93afc388296ec47843c864547244bb8535143e82e696579f286585f86d72a59eca1e6b3f6ef3b15d9ee2c2b51659897893be890
SSDEEP

24576:2Fh69Fnix1kHcPGlFERUmuMT/Wzmq3fjmNVZvpK0vMTuFU9Kr61B9wrEH7dX:C69FikjsYvjmNfvpX0TuF2Z1tX

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/0x000c000000023b27-1.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/0x000c000000023b27-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
224	regsvr32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b27-1.dat	upx
behavioral2/memory/224-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/224-6-0x0000000010000000-0x0000000010030000-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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	224	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4028 wrote to memory of 224	4028	regsvr32.exe	83
PID 4028 wrote to memory of 224	4028	regsvr32.exe	83
PID 4028 wrote to memory of 224	4028	regsvr32.exe	83

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ee6b8de5d3ca5d6b7abffd0017b4a1514b1c88c61da62408f5ff1333396fcbea.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4028
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\ee6b8de5d3ca5d6b7abffd0017b4a1514b1c88c61da62408f5ff1333396fcbea.dll
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:224

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/224-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/224-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download