floxif | 812af0ec9e1dfd8f48b47fd148bafe6eecb42d0a304bc0e4539750dd23820a7f

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24-12-2024 16:21

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General

Target

Floxif.exe
Size

532KB
MD5

00add4a97311b2b8b6264674335caab6
SHA1

3688de985909cc9f9fa6e0a4f2e43d986fe6d0ec
SHA256

812af0ec9e1dfd8f48b47fd148bafe6eecb42d0a304bc0e4539750dd23820a7f
SHA512

aaf5dae929e6b5809b77b6a79ab833e548b66fb628afeb20b554d678947494a6804cb3d59bf6bbcb2b14cede1a0609aa41f8e7fe8a7999d578e8b7af7144cb70
SSDEEP

12288:l86GkvJFajbhjTpHjq0dfpT1Oc02XEfGdnGwVUNUnEnAE3F:l8lT9PdpwO0fkGwVUSnEnAoF

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
behavioral1/files/0x0010000000013439-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0010000000013439-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
628	Floxif.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0010000000013439-1.dat	upx
behavioral1/memory/628-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/628-7-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	Floxif.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2664	628	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 1 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	Floxif.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	628	Floxif.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 628 wrote to memory of 2664	628	Floxif.exe	31
PID 628 wrote to memory of 2664	628	Floxif.exe	31
PID 628 wrote to memory of 2664	628	Floxif.exe	31
PID 628 wrote to memory of 2664	628	Floxif.exe	31

C:\Users\Admin\AppData\Local\Temp\Floxif.exe
"C:\Users\Admin\AppData\Local\Temp\Floxif.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:628
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 628 -s 224
  2⤵
  - Program crash
  PID:2664

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Program Files\Common Files\System\symsrv.dll

Filesize
72KB

MD5
ccf7e487353602c57e2e743d047aca36

SHA1
99f66919152d67a882685a41b7130af5f7703888

SHA256
eaf76e5f1a438478ecf7b678744da34e9d9e5038b128f0c595672ee1dbbfd914

SHA512
dde0366658082b142faa6487245bfc8b8942605f0ede65d12f8c368ff3673ca18e416a4bf132c4bee5be43e94aef0531be2008746c24f1e6b2f294a63ab1486c

Download Submit
memory/628-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/628-7-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/628-5-0x00000000008F0000-0x0000000000965000-memory.dmp

Filesize
468KB

Download