floxif | 08b66eccffdadb22240ab41414e0f83f2b46dabeddb9afda79252eb749812ea5

Analysis

max time kernel
94s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
06/09/2024, 23:09

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
3b2f1c06256b237a156a3d62143b3f80N.dll
Size 216KB
Sample240906-25cgnssdrn
SHA256 08b66eccffdadb22240ab41414e0f83f2b46dabeddb9afda79252eb749812ea5
MD5 3b2f1c06256b237a156a3d62143b3f80
SHA1 936bca5b6d3b6be014e3f78b18cce0e69c98a141
SHA512 6827881c2c74ce608c18838bb32a4ecaa7a3e64053921431c9a014560b6e680aa7a5ccac1d4f87cc004183ded7c920eea606f2c57f8e981254e0837bc0cb1b23
SSDEEP 6144:FbS9jmMDJf+0/6ljTBV+UdvrEFp7hK2bw:kjmMDl+5BjvrEH7A
MD5 SHA1 SHA512 SSDEEP

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/0x00090000000233d1-3.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00090000000233d1-3.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
1076	rundll32.exe
1076	rundll32.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00090000000233d1-3.dat	upx
behavioral2/memory/1076-7-0x0000000001350000-0x0000000001380000-memory.dmp	upx
behavioral2/memory/1076-6-0x0000000001350000-0x0000000001380000-memory.dmp	upx
behavioral2/memory/1076-10-0x0000000001350000-0x0000000001380000-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
3908	1076	WerFault.exe	83

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	1076	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5084 wrote to memory of 1076	5084	rundll32.exe	83
PID 5084 wrote to memory of 1076	5084	rundll32.exe	83
PID 5084 wrote to memory of 1076	5084	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3b2f1c06256b237a156a3d62143b3f80N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3b2f1c06256b237a156a3d62143b3f80N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1076
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1076 -s 712
    3⤵
    - Program crash
    PID:3908

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1076 -ip 1076
1⤵
PID:1948

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

Loading Replay Monitor...

Downloads

symsrv.dll

Path C:\Program Files\Common Files\System\symsrv.dll
Size 67KB
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab
SSDEEP 1536:YjV8y93KQpFQmPLRk7G50zy/riF12jvRyo0hQk7ZL:c8y93KQjy7G55riF1cMo03V
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1076-7-0x0000000001350000-0x0000000001380000-memory.dmp

Download

memory/1076-6-0x0000000001350000-0x0000000001380000-memory.dmp

Download

memory/1076-10-0x0000000001350000-0x0000000001380000-memory.dmp

Download

memory/1076-9-0x0000000010000000-0x0000000010025000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads