floxif | ab3f91057a8e87623b6338a5bac14295f5289de859ca9e4d1982464f4efd5d60

Analysis

max time kernel
102s
max time network
103s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
22-08-2024 01:20

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General

Target

1d011edbc8c64a4438e9c7aa298d38c0N.dll
Size

1.3MB
MD5

1d011edbc8c64a4438e9c7aa298d38c0
SHA1

713b9cfe1c52064c1e212be48f6b8a10ce18643b
SHA256

ab3f91057a8e87623b6338a5bac14295f5289de859ca9e4d1982464f4efd5d60
SHA512

9597a9805d82d03f81798614dacc0ef4e541b93adff84f46347d9193988a4270e0cb3f0a1c93e8ff98362303dc3f554539cd4122eda0f13056c787f19d50d0e0
SSDEEP

24576:4orhrGbk0PpCcnCKZrhzuFWTAEn/RgaT2NX8nYRZR21omrEH7Bb:fcbwKrwWTADaOKYRZQwb

Score

10^/10

floxif backdoor discovery trojan upx

Malware Config

Signatures

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/0x0008000000023430-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0008000000023430-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4928	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0008000000023430-1.dat	upx
behavioral2/memory/4928-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4928-8-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3064	4928	WerFault.exe	84

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	4928	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 4928	4876	rundll32.exe	84
PID 4876 wrote to memory of 4928	4876	rundll32.exe	84
PID 4876 wrote to memory of 4928	4876	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1d011edbc8c64a4438e9c7aa298d38c0N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\1d011edbc8c64a4438e9c7aa298d38c0N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4928
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4928 -s 564
    3⤵
    - Program crash
    PID:3064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4928 -ip 4928
1⤵
PID:976

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

Replay Monitor

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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/4928-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4928-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4928-6-0x0000000010220000-0x000000001036A000-memory.dmp

Filesize
1.3MB

Download