floxif | a72ab0a232a4ab3060fa733b1d3f1543823f0c8651387210b275fbe874fcc71e

Analysis

max time kernel
90s
max time network
116s
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 09:15

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General

Target

a72ab0a232a4ab3060fa733b1d3f1543823f0c8651387210b275fbe874fcc71eN.dll
Size

477KB
MD5

8f70dabf0f9062e6326d40a105072580
SHA1

60efc24758de6fdc39de45439b2fef77d42e03e3
SHA256

a72ab0a232a4ab3060fa733b1d3f1543823f0c8651387210b275fbe874fcc71e
SHA512

ceeb3d8304fdd9aefac303224400d942b09cc7679f950b42192b98f6e0151954d9583ee5c04f9f659bde211a06c2adcba8630dc7f5395c815ba8de8c7ec49872
SSDEEP

6144:rFTZXSiC8EJ9iQJCG/VwZxnWOg+QqajaDl2DQTrsQvMRlkM4RD/qzMfU46PfT:rFTZmeQJCkGnnf0YtMRGM4h/qof6j

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/0x0008000000023cdd-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0008000000023cdd-1.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
772	rundll32.exe
772	rundll32.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
4140	arp.exe
4152	arp.exe
396	arp.exe
3960	arp.exe
3228	arp.exe
2140	arp.exe
1552	arp.exe
944	arp.exe
940	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0008000000023cdd-1.dat	upx
behavioral2/memory/772-7-0x0000000002910000-0x0000000002943000-memory.dmp	upx
behavioral2/memory/772-14-0x0000000002910000-0x0000000002943000-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
3088	772	WerFault.exe	84

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	772	rundll32.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 516 wrote to memory of 772	516	rundll32.exe	84
PID 516 wrote to memory of 772	516	rundll32.exe	84
PID 516 wrote to memory of 772	516	rundll32.exe	84
PID 772 wrote to memory of 2140	772	rundll32.exe	86
PID 772 wrote to memory of 2140	772	rundll32.exe	86
PID 772 wrote to memory of 2140	772	rundll32.exe	86
PID 772 wrote to memory of 4140	772	rundll32.exe	89
PID 772 wrote to memory of 4140	772	rundll32.exe	89
PID 772 wrote to memory of 4140	772	rundll32.exe	89
PID 772 wrote to memory of 3228	772	rundll32.exe	90
PID 772 wrote to memory of 3228	772	rundll32.exe	90
PID 772 wrote to memory of 3228	772	rundll32.exe	90
PID 772 wrote to memory of 940	772	rundll32.exe	91
PID 772 wrote to memory of 940	772	rundll32.exe	91
PID 772 wrote to memory of 940	772	rundll32.exe	91
PID 772 wrote to memory of 3960	772	rundll32.exe	92
PID 772 wrote to memory of 3960	772	rundll32.exe	92
PID 772 wrote to memory of 3960	772	rundll32.exe	92
PID 772 wrote to memory of 944	772	rundll32.exe	93
PID 772 wrote to memory of 944	772	rundll32.exe	93
PID 772 wrote to memory of 944	772	rundll32.exe	93
PID 772 wrote to memory of 396	772	rundll32.exe	94
PID 772 wrote to memory of 396	772	rundll32.exe	94
PID 772 wrote to memory of 396	772	rundll32.exe	94
PID 772 wrote to memory of 1552	772	rundll32.exe	95
PID 772 wrote to memory of 1552	772	rundll32.exe	95
PID 772 wrote to memory of 1552	772	rundll32.exe	95
PID 772 wrote to memory of 4152	772	rundll32.exe	96
PID 772 wrote to memory of 4152	772	rundll32.exe	96
PID 772 wrote to memory of 4152	772	rundll32.exe	96

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a72ab0a232a4ab3060fa733b1d3f1543823f0c8651387210b275fbe874fcc71eN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:516
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a72ab0a232a4ab3060fa733b1d3f1543823f0c8651387210b275fbe874fcc71eN.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:772
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2140
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.0.1 cf-19-a7-d0-92-39
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4140
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.255.255 2d-0b-f8-51-4b-b9
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3228
- - C:\Windows\SysWOW64\arp.exe
    arp -s 136.243.76.170 15-2f-8a-a1-c9-67
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:940
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.22 31-de-64-40-60-18
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3960
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.251 72-df-03-8b-e0-a8
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:944
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.252 4b-7e-28-fa-ab-75
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:396
- - C:\Windows\SysWOW64\arp.exe
    arp -s 239.255.255.250 0d-43-1a-31-da-21
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1552
- - C:\Windows\SysWOW64\arp.exe
    arp -s 255.255.255.255 d1-21-17-08-63-0e
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4152
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 772 -s 732
    3⤵
    - Program crash
    PID:3088

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 772 -ip 772
1⤵
PID:4144

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/772-7-0x0000000002910000-0x0000000002943000-memory.dmp

Filesize
204KB

Download
memory/772-8-0x0000000010002000-0x0000000010003000-memory.dmp

Filesize
4KB

Download
memory/772-9-0x0000000010000000-0x0000000010063000-memory.dmp

Filesize
396KB

Download
memory/772-3-0x0000000002910000-0x0000000002943000-memory.dmp

Filesize
204KB

Download
memory/772-10-0x0000000010000000-0x0000000010063000-memory.dmp

Filesize
396KB

Download
memory/772-15-0x0000000010000000-0x0000000010063000-memory.dmp

Filesize
396KB

Download
memory/772-14-0x0000000002910000-0x0000000002943000-memory.dmp

Filesize
204KB

Download