floxif | c47c08f9d9b2d8b8825b47215359ca017b33c5dd7eb0df6b6305ba5767e0aa4e

Analysis

max time kernel
92s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2024, 03:06

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General

Target

c47c08f9d9b2d8b8825b47215359ca017b33c5dd7eb0df6b6305ba5767e0aa4e.dll
Size

163KB
MD5

1c7659ffa430806fccca005f7ba6df93
SHA1

3b687ae692cf1c8bd545379beeeb07fed054aa92
SHA256

c47c08f9d9b2d8b8825b47215359ca017b33c5dd7eb0df6b6305ba5767e0aa4e
SHA512

6939a47832043780a75e27b536686076a37476b1946a9aa8c91a6678ed0efc9783f23d394340afab1f584f635880bc0a4b4fb54f7904dd05f7acb09bf54d9656
SSDEEP

3072:ryy9d6X81PIZyTmPP56e5lmeqsQvVqRlkM4OAD/KLznBuB2JA2BjaZBlwco:rFdz1PIEGieqsQvMRlkM4RD/qzMfUWBs

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 4 IoCs

pid	Process
116	rundll32.exe
116	rundll32.exe
3664	WerFault.exe
1324	WerFault.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
3528	arp.exe
392	arp.exe
3940	arp.exe
2472	arp.exe
1480	arp.exe
1204	arp.exe
4504	arp.exe
2608	arp.exe
964	arp.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/116-5-0x00000000006E0000-0x0000000000713000-memory.dmp	upx
behavioral2/memory/116-13-0x00000000006E0000-0x0000000000713000-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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1324	116	WerFault.exe	83

System Location Discovery: System Language Discovery 1 TTPs 10 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	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	116	rundll32.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2588 wrote to memory of 116	2588	rundll32.exe	83
PID 2588 wrote to memory of 116	2588	rundll32.exe	83
PID 2588 wrote to memory of 116	2588	rundll32.exe	83
PID 116 wrote to memory of 4504	116	rundll32.exe	84
PID 116 wrote to memory of 4504	116	rundll32.exe	84
PID 116 wrote to memory of 4504	116	rundll32.exe	84
PID 116 wrote to memory of 392	116	rundll32.exe	88
PID 116 wrote to memory of 392	116	rundll32.exe	88
PID 116 wrote to memory of 392	116	rundll32.exe	88
PID 116 wrote to memory of 3528	116	rundll32.exe	89
PID 116 wrote to memory of 3528	116	rundll32.exe	89
PID 116 wrote to memory of 3528	116	rundll32.exe	89
PID 116 wrote to memory of 1204	116	rundll32.exe	90
PID 116 wrote to memory of 1204	116	rundll32.exe	90
PID 116 wrote to memory of 1204	116	rundll32.exe	90
PID 116 wrote to memory of 1480	116	rundll32.exe	91
PID 116 wrote to memory of 1480	116	rundll32.exe	91
PID 116 wrote to memory of 1480	116	rundll32.exe	91
PID 116 wrote to memory of 964	116	rundll32.exe	92
PID 116 wrote to memory of 964	116	rundll32.exe	92
PID 116 wrote to memory of 964	116	rundll32.exe	92
PID 116 wrote to memory of 2472	116	rundll32.exe	93
PID 116 wrote to memory of 2472	116	rundll32.exe	93
PID 116 wrote to memory of 2472	116	rundll32.exe	93
PID 116 wrote to memory of 2608	116	rundll32.exe	94
PID 116 wrote to memory of 2608	116	rundll32.exe	94
PID 116 wrote to memory of 2608	116	rundll32.exe	94
PID 116 wrote to memory of 3940	116	rundll32.exe	95
PID 116 wrote to memory of 3940	116	rundll32.exe	95
PID 116 wrote to memory of 3940	116	rundll32.exe	95

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c47c08f9d9b2d8b8825b47215359ca017b33c5dd7eb0df6b6305ba5767e0aa4e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2588
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c47c08f9d9b2d8b8825b47215359ca017b33c5dd7eb0df6b6305ba5767e0aa4e.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:116
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4504
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.0.1 6b-5c-24-c6-54-c1
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:392
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.255.255 33-29-57-a6-e0-0f
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3528
- - C:\Windows\SysWOW64\arp.exe
    arp -s 37.27.61.182 0d-40-1d-1b-86-01
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1204
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.22 7f-03-9a-af-75-f8
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1480
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.251 fb-75-bc-16-a9-54
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:964
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.252 dc-be-44-5b-06-45
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2472
- - C:\Windows\SysWOW64\arp.exe
    arp -s 239.255.255.250 59-ff-fa-f3-25-55
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2608
- - C:\Windows\SysWOW64\arp.exe
    arp -s 255.255.255.255 65-36-33-c3-2c-fc
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3940
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 116 -s 900
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:1324

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 116 -ip 116
1⤵
- Loads dropped DLL
PID:3664

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
memory/116-4-0x00000000006E0000-0x0000000000713000-memory.dmp

Filesize
204KB

Download
memory/116-5-0x00000000006E0000-0x0000000000713000-memory.dmp

Filesize
204KB

Download
memory/116-11-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/116-13-0x00000000006E0000-0x0000000000713000-memory.dmp

Filesize
204KB

Download