floxif | 1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670f

Analysis

max time kernel
118s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 14:03

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General

Target

1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
Size

178KB
MD5

85e70a6c9a3d6939bb443a869be08da0
SHA1

f8247a7db3c2291adb6fba1c5f5a085dd17bb621
SHA256

1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670f
SHA512

7b891c07837991dc7570b37a078c4358a558a44bbde23e8a2b355d03e94ca3491e86f8cfb68b5a3c8372719cd43672e7349f79215aabcbd8b042a4253d142994
SSDEEP

3072:GGR826hD6O5AyQIrZBbSJK5sQvVqRlkM4OAD/KLznBuB2JA2BjG:GGR826l6OaYZ5sQvMRlkM4RD/qzMfUi

Score

10^/10

floxif backdoor discovery evasion 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

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe

Detects Floxif payload 1 IoCs

backdoor

resource	yara_rule
behavioral2/files/0x000c000000023b5b-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b5b-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.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:	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
3928	arp.exe
2848	arp.exe
4576	arp.exe
1952	arp.exe
3944	arp.exe
4572	arp.exe
2376	arp.exe
1992	arp.exe
2340	arp.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b5b-1.dat	upx
behavioral2/memory/3212-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/3212-14-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/3212-21-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/3212-34-0x0000000010000000-0x0000000010033000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
Key created	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
Key created	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
652	Process not Found
652	Process not Found

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3212 wrote to memory of 3928	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	82
PID 3212 wrote to memory of 3928	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	82
PID 3212 wrote to memory of 3928	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	82
PID 3212 wrote to memory of 2848	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	84
PID 3212 wrote to memory of 2848	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	84
PID 3212 wrote to memory of 2848	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	84
PID 3212 wrote to memory of 1952	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	85
PID 3212 wrote to memory of 1952	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	85
PID 3212 wrote to memory of 1952	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	85
PID 3212 wrote to memory of 4572	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	86
PID 3212 wrote to memory of 4572	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	86
PID 3212 wrote to memory of 4572	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	86
PID 3212 wrote to memory of 3944	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	87
PID 3212 wrote to memory of 3944	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	87
PID 3212 wrote to memory of 3944	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	87
PID 3212 wrote to memory of 2340	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	88
PID 3212 wrote to memory of 2340	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	88
PID 3212 wrote to memory of 2340	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	88
PID 3212 wrote to memory of 4576	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	89
PID 3212 wrote to memory of 4576	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	89
PID 3212 wrote to memory of 4576	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	89
PID 3212 wrote to memory of 1992	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	90
PID 3212 wrote to memory of 1992	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	90
PID 3212 wrote to memory of 1992	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	90
PID 3212 wrote to memory of 2376	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	91
PID 3212 wrote to memory of 2376	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	91
PID 3212 wrote to memory of 2376	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	91
PID 3212 wrote to memory of 3704	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	101
PID 3212 wrote to memory of 3704	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	101
PID 3212 wrote to memory of 3704	3212	1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe	101

C:\Users\Admin\AppData\Local\Temp\1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe
"C:\Users\Admin\AppData\Local\Temp\1009043023fbac9985a219dddf6e799c3858aa2b224ea762de6ec59bdae7670fN.exe"
1⤵
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3212
- C:\Windows\SysWOW64\arp.exe
  arp -a
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:3928
- C:\Windows\SysWOW64\arp.exe
  arp -s 10.127.0.1 68-1e-ee-11-01-49
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:2848
- C:\Windows\SysWOW64\arp.exe
  arp -s 10.127.255.255 f1-07-f8-5e-65-6c
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:1952
- C:\Windows\SysWOW64\arp.exe
  arp -s 49.12.169.207 22-5e-c4-02-41-e0
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:4572
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.22 d5-a3-e2-1c-e2-8b
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:3944
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.251 39-ac-a2-25-7b-ca
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:2340
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.252 b9-d4-84-f8-fd-04
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:4576
- C:\Windows\SysWOW64\arp.exe
  arp -s 239.255.255.250 c2-90-82-8c-fa-80
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:1992
- C:\Windows\SysWOW64\arp.exe
  arp -s 255.255.255.255 11-d7-1c-1a-ce-8a
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:2376
- C:\Windows\SysWOW64\arp.exe
  arp -d
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3704

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

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

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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\Local\Temp\A1D26E2\BAC410E4C8C.tmp

Filesize
98KB

MD5
f732095e4605542770b481c707b71d96

SHA1
cf934b889813878ed04597ce4d95dc7c5d56892f

SHA256
be214a69ff33993ecafbcec832dadb833811e9d7a3447a214dcfb2bab1dbef20

SHA512
db89eeece0467813c96564501e00e46960e91c7faa52f3cbebd2d019c6418022d0b3984251d04011cd6241d9bd755822d575dd5cb4046b8b2c363b8189188e6d

Download Submit
memory/3212-4-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/3212-12-0x00000000008E1000-0x00000000008E2000-memory.dmp

Filesize
4KB

Download
memory/3212-14-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/3212-15-0x00000000008E0000-0x00000000008FC000-memory.dmp

Filesize
112KB

Download
memory/3212-21-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/3212-34-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download