floxif | c47c08f9d9b2d8b8825b47215359ca017b33c5dd7eb0df6b6305ba5767e0aa4e

Analysis

max time kernel
93s
max time network
150s
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 03:03

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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 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/0x000c000000023b0f-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b0f-1.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
3184	rundll32.exe
3184	rundll32.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
1572	arp.exe
4956	arp.exe
3676	arp.exe
2764	arp.exe
3668	arp.exe
4236	arp.exe
4460	arp.exe
4476	arp.exe
1968	arp.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b0f-1.dat	upx
behavioral2/memory/3184-5-0x0000000002A70000-0x0000000002AA3000-memory.dmp	upx
behavioral2/memory/3184-4-0x0000000002A70000-0x0000000002AA3000-memory.dmp	upx
behavioral2/memory/3184-11-0x0000000002A70000-0x0000000002AA3000-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
3392	3184	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	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
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	3184	rundll32.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3528 wrote to memory of 3184	3528	rundll32.exe	83
PID 3528 wrote to memory of 3184	3528	rundll32.exe	83
PID 3528 wrote to memory of 3184	3528	rundll32.exe	83
PID 3184 wrote to memory of 4460	3184	rundll32.exe	84
PID 3184 wrote to memory of 4460	3184	rundll32.exe	84
PID 3184 wrote to memory of 4460	3184	rundll32.exe	84
PID 3184 wrote to memory of 1572	3184	rundll32.exe	88
PID 3184 wrote to memory of 1572	3184	rundll32.exe	88
PID 3184 wrote to memory of 1572	3184	rundll32.exe	88
PID 3184 wrote to memory of 4956	3184	rundll32.exe	89
PID 3184 wrote to memory of 4956	3184	rundll32.exe	89
PID 3184 wrote to memory of 4956	3184	rundll32.exe	89
PID 3184 wrote to memory of 3668	3184	rundll32.exe	90
PID 3184 wrote to memory of 3668	3184	rundll32.exe	90
PID 3184 wrote to memory of 3668	3184	rundll32.exe	90
PID 3184 wrote to memory of 3676	3184	rundll32.exe	91
PID 3184 wrote to memory of 3676	3184	rundll32.exe	91
PID 3184 wrote to memory of 3676	3184	rundll32.exe	91
PID 3184 wrote to memory of 1968	3184	rundll32.exe	92
PID 3184 wrote to memory of 1968	3184	rundll32.exe	92
PID 3184 wrote to memory of 1968	3184	rundll32.exe	92
PID 3184 wrote to memory of 4476	3184	rundll32.exe	93
PID 3184 wrote to memory of 4476	3184	rundll32.exe	93
PID 3184 wrote to memory of 4476	3184	rundll32.exe	93
PID 3184 wrote to memory of 2764	3184	rundll32.exe	96
PID 3184 wrote to memory of 2764	3184	rundll32.exe	96
PID 3184 wrote to memory of 2764	3184	rundll32.exe	96
PID 3184 wrote to memory of 4236	3184	rundll32.exe	99
PID 3184 wrote to memory of 4236	3184	rundll32.exe	99
PID 3184 wrote to memory of 4236	3184	rundll32.exe	99

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c47c08f9d9b2d8b8825b47215359ca017b33c5dd7eb0df6b6305ba5767e0aa4e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3528
- 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:3184
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4460
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.0.1 80-ec-4c-50-61-97
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1572
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.255.255 3e-68-0c-dc-32-dc
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4956
- - C:\Windows\SysWOW64\arp.exe
    arp -s 37.27.61.181 7f-99-0b-45-85-eb
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3668
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.22 d6-0e-f7-42-e9-89
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3676
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.251 0c-5e-aa-be-e3-43
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1968
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.252 be-c9-20-60-91-0e
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4476
- - C:\Windows\SysWOW64\arp.exe
    arp -s 239.255.255.250 67-0b-5e-0f-03-00
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2764
- - C:\Windows\SysWOW64\arp.exe
    arp -s 255.255.255.255 03-4f-9c-be-cb-9d
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4236
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3184 -s 888
    3⤵
    - Program crash
    PID:3392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 3184 -ip 3184
1⤵
PID:3992

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

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

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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/3184-5-0x0000000002A70000-0x0000000002AA3000-memory.dmp

Filesize
204KB

Download
memory/3184-4-0x0000000002A70000-0x0000000002AA3000-memory.dmp

Filesize
204KB

Download
memory/3184-9-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3184-11-0x0000000002A70000-0x0000000002AA3000-memory.dmp

Filesize
204KB

Download