floxif | c85d31aa34ce7dc2071d63f21ccf1235a945a28a9657f91692c950b3b20662f4

Analysis

max time kernel
92s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-12-2024 00:38

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General

Target

c85d31aa34ce7dc2071d63f21ccf1235a945a28a9657f91692c950b3b20662f4N.dll
Size

6.5MB
MD5

d2e9239b464b78e9810f9ed2a5635d50
SHA1

578c55058c64b7358fb6e18de3daa3f34c1ab55b
SHA256

c85d31aa34ce7dc2071d63f21ccf1235a945a28a9657f91692c950b3b20662f4
SHA512

e8fa5a14f34c3482bccd10febd146e59d45eae27d3ac7f7b9bcabc3b00f3be7d57d75f5754637f33289a92eb23ef11f268d5c7cc3bbee0004b91c590cbfe10e8
SSDEEP

98304:xA/49G+5QTApMxlbn5IKbVflIdtKPLMLbzPSsUyrOpsDrGMp54:J9GscXxlNZ9e8PLM27NpIrxpa

Score

10^/10

floxif backdoor discovery spyware stealer 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/0x000a000000023bb9-3.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000a000000023bb9-3.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
4988	rundll32.exe
4988	rundll32.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000023bb9-3.dat	upx
behavioral2/memory/4988-7-0x0000000002E70000-0x0000000002EA0000-memory.dmp	upx
behavioral2/memory/4988-6-0x0000000002E70000-0x0000000002EA0000-memory.dmp	upx
behavioral2/memory/4988-13-0x0000000002E70000-0x0000000002EA0000-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 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	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4988	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 4988	2036	rundll32.exe	83
PID 2036 wrote to memory of 4988	2036	rundll32.exe	83
PID 2036 wrote to memory of 4988	2036	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c85d31aa34ce7dc2071d63f21ccf1235a945a28a9657f91692c950b3b20662f4N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c85d31aa34ce7dc2071d63f21ccf1235a945a28a9657f91692c950b3b20662f4N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/4988-7-0x0000000002E70000-0x0000000002EA0000-memory.dmp

Filesize
192KB

Download
memory/4988-6-0x0000000002E70000-0x0000000002EA0000-memory.dmp

Filesize
192KB

Download
memory/4988-9-0x00000000041C0000-0x000000000479D000-memory.dmp

Filesize
5.9MB

Download
memory/4988-13-0x0000000002E70000-0x0000000002EA0000-memory.dmp

Filesize
192KB

Download