floxif | 3c4f3198955f4e3843403dad7a846d8320460ea29f4c2049e156846106a456d0

Analysis

max time kernel
94s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-11-2024 22:58

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General

Target

3c4f3198955f4e3843403dad7a846d8320460ea29f4c2049e156846106a456d0.dll
Size

118KB
MD5

1684484aa12277118eb6b359d7efc793
SHA1

95684439604437f403fe28ef4e96fa57d7ab833a
SHA256

3c4f3198955f4e3843403dad7a846d8320460ea29f4c2049e156846106a456d0
SHA512

9460e3eee4a3279c9b89d2a7175503e9ac9cff4ff88c9cefa2d77bb7a2f3124d0c58b543165ca861872c3b053292200d305124d03502a7a0ca2b78c73e241965
SSDEEP

3072:GMXfZ8WK5j/TKk6x2lQBV+UdE+rECWp7hKdbuY:G2mWK56kcBV+UdvrEFp7hKdaY

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/0x0009000000023c7c-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023c7c-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2848	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023c7c-1.dat	upx
behavioral2/memory/2848-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/2848-5-0x0000000010000000-0x0000000010030000-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

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	2848	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4836 wrote to memory of 2848	4836	rundll32.exe	83
PID 4836 wrote to memory of 2848	4836	rundll32.exe	83
PID 4836 wrote to memory of 2848	4836	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3c4f3198955f4e3843403dad7a846d8320460ea29f4c2049e156846106a456d0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4836
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3c4f3198955f4e3843403dad7a846d8320460ea29f4c2049e156846106a456d0.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2848

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/2848-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2848-5-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download