floxif | 8fcb232388b18ba35a9e243eceaff1865669abf6b968d86a51502706cad7c550

Analysis

max time kernel
90s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
18-12-2024 23:07

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General

Target

8fcb232388b18ba35a9e243eceaff1865669abf6b968d86a51502706cad7c550N.dll
Size

1.8MB
MD5

ca8b3aa10e0125614de9778d3c152e20
SHA1

99e5faf2375d8999f7e84d43faa462ff34bf74f8
SHA256

8fcb232388b18ba35a9e243eceaff1865669abf6b968d86a51502706cad7c550
SHA512

a8490a71b770f582296c291d8d9ae7fb88615dc73d21eb5844afea294198272376705ded4b9d142e91532a21bea9422e22e5d38be09b281651c10a367fa81ac8
SSDEEP

24576:phQtKE8quveQ6NbPwbmy4nt2YAp5iAaSx/zWjTvrzEnc1d7R+7x11IvN6CsX2wne:gv2eSdMPLHRi1OefQUT8xElF1q0u

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/0x000b000000023b58-1.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/0x000b000000023b58-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2496	rundll32.exe

Network Service Discovery 1 TTPs 1 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
4040	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2496-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/files/0x000b000000023b58-1.dat	upx
behavioral2/memory/2496-22-0x0000000010000000-0x0000000010033000-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	2496	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2432 wrote to memory of 2496	2432	rundll32.exe	83
PID 2432 wrote to memory of 2496	2432	rundll32.exe	83
PID 2432 wrote to memory of 2496	2432	rundll32.exe	83
PID 2496 wrote to memory of 4040	2496	rundll32.exe	84
PID 2496 wrote to memory of 4040	2496	rundll32.exe	84
PID 2496 wrote to memory of 4040	2496	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8fcb232388b18ba35a9e243eceaff1865669abf6b968d86a51502706cad7c550N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8fcb232388b18ba35a9e243eceaff1865669abf6b968d86a51502706cad7c550N.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:2496
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4040

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

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
C:\Users\Admin\AppData\LocalLow\SogouPY.users\acc.dat.wtm

Filesize
80B

MD5
cfa8be79679b6e09e948ce718d382305

SHA1
e6b39f1518cec29e9ef5a52c63c685f89fb576aa

SHA256
31857bb4d49c4288083040e4062d9eefa68e8c843657a0dce5c628d400b88e7b

SHA512
5f5fcd24018421c19613a358fa7a97e6feaa00a5647b8134cb19c4045e0a35f934e5d8b9e3ef671e1d9d60a3ab0fcb4296f58d84a7e981a240225a46f5c6e3ce

Download Submit
memory/2496-4-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2496-22-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download