floxif | a52e5ae282ceef7d8b9a779422c83985945e51e877a7afa17d95d7189399686d

Analysis

max time kernel
94s
max time network
104s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-01-2025 16:47

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General

Target

a52e5ae282ceef7d8b9a779422c83985945e51e877a7afa17d95d7189399686dN.dll
Size

1.7MB
MD5

f96efaca96a83f75c903324eab80bbb0
SHA1

2585d288d6e54f089cae775ac4ce9cafb5b7259f
SHA256

a52e5ae282ceef7d8b9a779422c83985945e51e877a7afa17d95d7189399686d
SHA512

6134c36b4d318218bc7620716c41282bb857b3394a609d7c3dd7f8e411d8e3e4d05e44f8b52f22ce515d557cf40b5f0962c32f5b768bfba2c9e5b9971eac1162
SSDEEP

24576:RcHPcgkDwhpEPQzH/tX4hzRBiXJk3wbFJjTib7DllUD4+DXj/KOvc5AmfQQRAH1+:OrylBcbybf+Tv2AIVRkokHT9krrkQ1qw

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/0x000c000000023ba0-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023ba0-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
928	rundll32.exe

Network Service Discovery 1 TTPs 1 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
4532	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/928-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/files/0x000c000000023ba0-1.dat	upx
behavioral2/memory/928-23-0x0000000010000000-0x0000000010033000-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

System Location Discovery: System Language Discovery 1 TTPs 2 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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	928	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 928	2992	rundll32.exe	83
PID 2992 wrote to memory of 928	2992	rundll32.exe	83
PID 2992 wrote to memory of 928	2992	rundll32.exe	83
PID 928 wrote to memory of 4532	928	rundll32.exe	84
PID 928 wrote to memory of 4532	928	rundll32.exe	84
PID 928 wrote to memory of 4532	928	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a52e5ae282ceef7d8b9a779422c83985945e51e877a7afa17d95d7189399686dN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a52e5ae282ceef7d8b9a779422c83985945e51e877a7afa17d95d7189399686dN.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:928
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4532

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
C:\Users\Admin\AppData\LocalLow\SogouPY.users\acc.dat.wtm

Filesize
80B

MD5
25aa3a51c6a295b2d17709e3660c6fab

SHA1
f9afc93ffb8efb71f14420b4c5fe74a697bb07ec

SHA256
9ba68264d9e3f7b75740ce93563fb34a63f3a95ab76bb6e92def5d0ccf7b9cf9

SHA512
04e3a4dd36025c76417e2d2ecdda661f3f6e27490d4f17a86356d8ebc0dbc8e0b4d234b3d0f9788a59ccbcd8deb48e91e53947e167350823732f00d1a1c82480

Download Submit
memory/928-4-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/928-5-0x00000000748F1000-0x00000000748F2000-memory.dmp

Filesize
4KB

Download
memory/928-23-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download