floxif | f37c66290615525b1226b8189b8462135af1b1e88034a41ca47107498055b604

Analysis

max time kernel
95s
max time network
98s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2024 19:50

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General

Target

f37c66290615525b1226b8189b8462135af1b1e88034a41ca47107498055b604N.dll
Size

241KB
MD5

8b79e5182923b1cb542a4d0a065e9860
SHA1

f819196bf93221f6760a943f080f63c90504efc7
SHA256

f37c66290615525b1226b8189b8462135af1b1e88034a41ca47107498055b604
SHA512

d1cff7fe66f999a29b9a6c325762df47d6584e4d274888d08550ffec98b51e381c22aa019dd2632d15898ad2c64a589a7247186af0f947d18b0534c97d430f76
SSDEEP

6144:GTWYCAvCMeFF3sTnvOTB5VsQvMRlkM4RD/qzMfUpFg:GKYTuFFmnvOT7MRGM4h/qofkg

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/0x000c000000023b30-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b30-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2100	rundll32.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
4180	arp.exe
4064	arp.exe
3712	arp.exe
2132	arp.exe
5072	arp.exe
60	arp.exe
2440	arp.exe
2632	arp.exe
440	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2100-2-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/files/0x000c000000023b30-1.dat	upx
behavioral2/memory/2100-8-0x0000000010000000-0x0000000010033000-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
1148	2100	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	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	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2100	rundll32.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3644 wrote to memory of 2100	3644	rundll32.exe	82
PID 3644 wrote to memory of 2100	3644	rundll32.exe	82
PID 3644 wrote to memory of 2100	3644	rundll32.exe	82
PID 2100 wrote to memory of 60	2100	rundll32.exe	84
PID 2100 wrote to memory of 60	2100	rundll32.exe	84
PID 2100 wrote to memory of 60	2100	rundll32.exe	84
PID 2100 wrote to memory of 4180	2100	rundll32.exe	87
PID 2100 wrote to memory of 4180	2100	rundll32.exe	87
PID 2100 wrote to memory of 4180	2100	rundll32.exe	87
PID 2100 wrote to memory of 5072	2100	rundll32.exe	88
PID 2100 wrote to memory of 5072	2100	rundll32.exe	88
PID 2100 wrote to memory of 5072	2100	rundll32.exe	88
PID 2100 wrote to memory of 2132	2100	rundll32.exe	89
PID 2100 wrote to memory of 2132	2100	rundll32.exe	89
PID 2100 wrote to memory of 2132	2100	rundll32.exe	89
PID 2100 wrote to memory of 3712	2100	rundll32.exe	90
PID 2100 wrote to memory of 3712	2100	rundll32.exe	90
PID 2100 wrote to memory of 3712	2100	rundll32.exe	90
PID 2100 wrote to memory of 440	2100	rundll32.exe	91
PID 2100 wrote to memory of 440	2100	rundll32.exe	91
PID 2100 wrote to memory of 440	2100	rundll32.exe	91
PID 2100 wrote to memory of 2632	2100	rundll32.exe	92
PID 2100 wrote to memory of 2632	2100	rundll32.exe	92
PID 2100 wrote to memory of 2632	2100	rundll32.exe	92
PID 2100 wrote to memory of 4064	2100	rundll32.exe	93
PID 2100 wrote to memory of 4064	2100	rundll32.exe	93
PID 2100 wrote to memory of 4064	2100	rundll32.exe	93
PID 2100 wrote to memory of 2440	2100	rundll32.exe	94
PID 2100 wrote to memory of 2440	2100	rundll32.exe	94
PID 2100 wrote to memory of 2440	2100	rundll32.exe	94

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f37c66290615525b1226b8189b8462135af1b1e88034a41ca47107498055b604N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3644
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f37c66290615525b1226b8189b8462135af1b1e88034a41ca47107498055b604N.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:2100
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:60
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.0.1 22-d0-a6-d4-ae-f6
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4180
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.255.255 d9-69-fd-69-a1-b1
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:5072
- - C:\Windows\SysWOW64\arp.exe
    arp -s 49.12.169.207 46-7a-29-b8-72-e1
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2132
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.22 75-64-cc-a0-b3-98
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3712
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.251 5e-d3-1e-3d-13-26
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:440
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.252 04-8a-d4-1d-1f-ad
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2632
- - C:\Windows\SysWOW64\arp.exe
    arp -s 239.255.255.250 5d-42-05-1d-79-34
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4064
- - C:\Windows\SysWOW64\arp.exe
    arp -s 255.255.255.255 ca-55-14-f1-d8-84
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2440
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2100 -s 704
    3⤵
    - Program crash
    PID:1148

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2100 -ip 2100
1⤵
PID:3068

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/2100-2-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2100-8-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2100-6-0x00000000758F0000-0x0000000075919000-memory.dmp

Filesize
164KB

Download