floxif | c47c08f9d9b2d8b8825b47215359ca017b33c5dd7eb0df6b6305ba5767e0aa4e

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 bootkit discovery persistence 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
behavioral1/files/0x0007000000012119-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0007000000012119-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1692	rundll32.exe

Network Service Discovery 1 TTPs 2 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
2748	arp.exe
1672	arp.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0007000000012119-1.dat	upx
behavioral1/memory/1692-3-0x00000000001E0000-0x0000000000213000-memory.dmp	upx
behavioral1/memory/1692-7-0x00000000001E0000-0x0000000000213000-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
1924	1692	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 3 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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1692	rundll32.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1680 wrote to memory of 1692	1680	rundll32.exe	30
PID 1680 wrote to memory of 1692	1680	rundll32.exe	30
PID 1680 wrote to memory of 1692	1680	rundll32.exe	30
PID 1680 wrote to memory of 1692	1680	rundll32.exe	30
PID 1680 wrote to memory of 1692	1680	rundll32.exe	30
PID 1680 wrote to memory of 1692	1680	rundll32.exe	30
PID 1680 wrote to memory of 1692	1680	rundll32.exe	30
PID 1692 wrote to memory of 1672	1692	rundll32.exe	31
PID 1692 wrote to memory of 1672	1692	rundll32.exe	31
PID 1692 wrote to memory of 1672	1692	rundll32.exe	31
PID 1692 wrote to memory of 1672	1692	rundll32.exe	31
PID 1692 wrote to memory of 1924	1692	rundll32.exe	32
PID 1692 wrote to memory of 1924	1692	rundll32.exe	32
PID 1692 wrote to memory of 1924	1692	rundll32.exe	32
PID 1692 wrote to memory of 1924	1692	rundll32.exe	32
PID 1692 wrote to memory of 2748	1692	rundll32.exe	35
PID 1692 wrote to memory of 2748	1692	rundll32.exe	35
PID 1692 wrote to memory of 2748	1692	rundll32.exe	35
PID 1692 wrote to memory of 2748	1692	rundll32.exe	35

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c47c08f9d9b2d8b8825b47215359ca017b33c5dd7eb0df6b6305ba5767e0aa4e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1680
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c47c08f9d9b2d8b8825b47215359ca017b33c5dd7eb0df6b6305ba5767e0aa4e.dll,#1
  2⤵
  - Loads dropped DLL
  - Writes to the Master Boot Record (MBR)
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1692
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1672
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1692 -s 536
    3⤵
    - Program crash
    PID:1924
- - 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:2748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Discovery

Network Service Discovery

1

T1046

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Program Files\Common Files\System\symsrv.dll

Filesize
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
memory/1692-3-0x00000000001E0000-0x0000000000213000-memory.dmp

Filesize
204KB

Download
memory/1692-7-0x00000000001E0000-0x0000000000213000-memory.dmp

Filesize
204KB

Download
memory/1692-5-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads