floxif | b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfc

Analysis

max time kernel
95s
max time network
97s
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 01:34

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General

Target

b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe
Size

622KB
MD5

e53bedc018040b740fa400309ffff3c0
SHA1

ef5d7541b48a3d275b01ec90a49c46ba42b4711b
SHA256

b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfc
SHA512

8eadecb93af8dab479590ed3d3f09266bc49a7b586a063362db50c24ab1cc23e9f94aa7be501bed484e9bdfdef4f43c8ef7314d1ac60b3d5263bd411bb56c6b6
SSDEEP

12288:fIlsAkjIf/WbGH/+8zoXEyO4pV1Q2LcgoLLoa5RZMRGM4h/qofn:fHAL7+8zuEg07goLLoIZMRGJ/qofn

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/0x000c000000023bb1-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023bb1-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\e:	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
2784	arp.exe
4104	arp.exe
1356	arp.exe
1424	arp.exe
1232	arp.exe
4860	arp.exe
2316	arp.exe
1772	arp.exe
2744	arp.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4976-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/files/0x000c000000023bb1-1.dat	upx
behavioral2/memory/4976-9-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/4976-11-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/4976-14-0x0000000010000000-0x0000000010033000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe

System Location Discovery: System Language Discovery 1 TTPs 11 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	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.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 behavior: EnumeratesProcesses 4 IoCs

pid	Process
4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe
4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe
4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe
4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
664	Process not Found
664	Process not Found

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 4976 wrote to memory of 4860	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	83
PID 4976 wrote to memory of 4860	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	83
PID 4976 wrote to memory of 4860	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	83
PID 4976 wrote to memory of 2784	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	85
PID 4976 wrote to memory of 2784	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	85
PID 4976 wrote to memory of 2784	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	85
PID 4976 wrote to memory of 1232	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	86
PID 4976 wrote to memory of 1232	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	86
PID 4976 wrote to memory of 1232	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	86
PID 4976 wrote to memory of 1424	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	87
PID 4976 wrote to memory of 1424	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	87
PID 4976 wrote to memory of 1424	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	87
PID 4976 wrote to memory of 1772	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	88
PID 4976 wrote to memory of 1772	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	88
PID 4976 wrote to memory of 1772	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	88
PID 4976 wrote to memory of 1356	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	89
PID 4976 wrote to memory of 1356	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	89
PID 4976 wrote to memory of 1356	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	89
PID 4976 wrote to memory of 2316	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	90
PID 4976 wrote to memory of 2316	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	90
PID 4976 wrote to memory of 2316	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	90
PID 4976 wrote to memory of 2744	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	91
PID 4976 wrote to memory of 2744	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	91
PID 4976 wrote to memory of 2744	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	91
PID 4976 wrote to memory of 4104	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	92
PID 4976 wrote to memory of 4104	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	92
PID 4976 wrote to memory of 4104	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	92
PID 4976 wrote to memory of 2904	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	103
PID 4976 wrote to memory of 2904	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	103
PID 4976 wrote to memory of 2904	4976	b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe	103

C:\Users\Admin\AppData\Local\Temp\b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe
"C:\Users\Admin\AppData\Local\Temp\b20ee3f8f0565bebda32fed81e7d4ba6d49fe45f2e2af2757173c548b10bacfcN.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4976
- C:\Windows\SysWOW64\arp.exe
  arp -a
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:4860
- C:\Windows\SysWOW64\arp.exe
  arp -s 10.127.0.1 93-4a-7d-ec-65-4a
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:2784
- C:\Windows\SysWOW64\arp.exe
  arp -s 10.127.255.255 0b-85-1a-96-0a-1b
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:1232
- C:\Windows\SysWOW64\arp.exe
  arp -s 49.12.169.207 d9-f0-8e-00-4f-17
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:1424
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.22 1e-93-08-60-9a-65
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:1772
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.251 97-b4-28-b6-69-ea
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:1356
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.252 93-59-53-2e-57-c9
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:2316
- C:\Windows\SysWOW64\arp.exe
  arp -s 239.255.255.250 68-f4-fb-8c-d7-f3
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:2744
- C:\Windows\SysWOW64\arp.exe
  arp -s 255.255.255.255 70-3c-2b-d3-1f-63
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:4104
- C:\Windows\SysWOW64\arp.exe
  arp -d
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2904

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

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/4976-4-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/4976-6-0x00000000009A1000-0x00000000009A2000-memory.dmp

Filesize
4KB

Download
memory/4976-9-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/4976-11-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/4976-10-0x00000000009A0000-0x0000000000A2B000-memory.dmp

Filesize
556KB

Download
memory/4976-14-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/4976-13-0x00000000009A0000-0x0000000000A2B000-memory.dmp

Filesize
556KB

Download