floxif | dc37a2af60f12ecda1fbbc6832c5698991d2338f031ef5dbf3a2a087e8013135

Analysis

max time kernel
93s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10-12-2024 06:43

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General

Target

dc37a2af60f12ecda1fbbc6832c5698991d2338f031ef5dbf3a2a087e8013135.dll
Size

123KB
MD5

a95005da2a9050f277ee7711f04abf3b
SHA1

c815c7b19933c43225019a0b8a9a10b4a3d92bbd
SHA256

dc37a2af60f12ecda1fbbc6832c5698991d2338f031ef5dbf3a2a087e8013135
SHA512

d6e2a962e2705432dd3424c737229a455c147f72a8b9a7252274b1272a1479447e35dc3f22669d1c840cf3acbe8270169b2f87a0c7def9bc4a0db045a260af07
SSDEEP

3072:Mdud0eNZxxZsQvVqRlkM4OAD/KLznBuB2JA2BjiU9:MduVNZ9sQvMRlkM4RD/qzMfU9

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/0x000c000000023b8c-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b8c-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
3676	rundll32.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
5032	arp.exe
4824	arp.exe
868	arp.exe
2232	arp.exe
4980	arp.exe
224	arp.exe
4964	arp.exe
4172	arp.exe
3828	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b8c-1.dat	upx
behavioral2/memory/3676-2-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/3676-8-0x0000000010000000-0x0000000010033000-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
3668	3676	WerFault.exe	82

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	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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3676	rundll32.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1340 wrote to memory of 3676	1340	rundll32.exe	82
PID 1340 wrote to memory of 3676	1340	rundll32.exe	82
PID 1340 wrote to memory of 3676	1340	rundll32.exe	82
PID 3676 wrote to memory of 868	3676	rundll32.exe	84
PID 3676 wrote to memory of 868	3676	rundll32.exe	84
PID 3676 wrote to memory of 868	3676	rundll32.exe	84
PID 3676 wrote to memory of 2232	3676	rundll32.exe	87
PID 3676 wrote to memory of 2232	3676	rundll32.exe	87
PID 3676 wrote to memory of 2232	3676	rundll32.exe	87
PID 3676 wrote to memory of 3828	3676	rundll32.exe	88
PID 3676 wrote to memory of 3828	3676	rundll32.exe	88
PID 3676 wrote to memory of 3828	3676	rundll32.exe	88
PID 3676 wrote to memory of 4172	3676	rundll32.exe	89
PID 3676 wrote to memory of 4172	3676	rundll32.exe	89
PID 3676 wrote to memory of 4172	3676	rundll32.exe	89
PID 3676 wrote to memory of 4964	3676	rundll32.exe	90
PID 3676 wrote to memory of 4964	3676	rundll32.exe	90
PID 3676 wrote to memory of 4964	3676	rundll32.exe	90
PID 3676 wrote to memory of 4824	3676	rundll32.exe	91
PID 3676 wrote to memory of 4824	3676	rundll32.exe	91
PID 3676 wrote to memory of 4824	3676	rundll32.exe	91
PID 3676 wrote to memory of 5032	3676	rundll32.exe	92
PID 3676 wrote to memory of 5032	3676	rundll32.exe	92
PID 3676 wrote to memory of 5032	3676	rundll32.exe	92
PID 3676 wrote to memory of 4980	3676	rundll32.exe	93
PID 3676 wrote to memory of 4980	3676	rundll32.exe	93
PID 3676 wrote to memory of 4980	3676	rundll32.exe	93
PID 3676 wrote to memory of 224	3676	rundll32.exe	97
PID 3676 wrote to memory of 224	3676	rundll32.exe	97
PID 3676 wrote to memory of 224	3676	rundll32.exe	97

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dc37a2af60f12ecda1fbbc6832c5698991d2338f031ef5dbf3a2a087e8013135.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1340
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\dc37a2af60f12ecda1fbbc6832c5698991d2338f031ef5dbf3a2a087e8013135.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:3676
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:868
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.0.1 ed-51-f9-32-09-19
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2232
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.255.255 04-bb-d7-39-a1-21
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3828
- - C:\Windows\SysWOW64\arp.exe
    arp -s 136.243.69.123 7f-97-d0-cd-9f-b9
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4172
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.22 ef-a4-c5-40-25-fa
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4964
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.251 29-25-74-10-cb-c6
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4824
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.252 ca-34-29-ca-29-c4
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:5032
- - C:\Windows\SysWOW64\arp.exe
    arp -s 239.255.255.250 2b-9f-a9-9e-7c-56
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4980
- - C:\Windows\SysWOW64\arp.exe
    arp -s 255.255.255.255 21-77-d0-f7-47-33
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:224
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3676 -s 700
    3⤵
    - Program crash
    PID:3668

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3676 -ip 3676
1⤵
PID:4504

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

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/3676-2-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/3676-6-0x0000000074DB0000-0x0000000074DBC000-memory.dmp

Filesize
48KB

Download
memory/3676-8-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download