floxif | 51a34541203abe060aaefeafa6b8b369dbce915ee883a99a24892f849190e448

General

Target

2025-02-07_35699e47451db1d4750fed87bb48df11_bkransomware_floxif.exe
Size

3.1MB
MD5

35699e47451db1d4750fed87bb48df11
SHA1

d6849db6d98b5424f880c4dab16a90d9a6460777
SHA256

51a34541203abe060aaefeafa6b8b369dbce915ee883a99a24892f849190e448
SHA512

ba957fbbc139d16791f3db5edb77e498bae5229345c9634ea6be547439fe1b358c564f7f41a961160d7ea0e829eb41d28cca44aa84952d05ce8246ceb251d72d
SSDEEP

98304:LyuAczGg/bu9VnlWAJQ9/D+WbKpvhm4WUZPWu/:LjGN97XWbKpvhm4WUZPWu/

Score

10^/10

floxif backdoor discovery persistence privilege_escalation 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/0x000e000000023ce7-1.dat	floxif

Downloads MZ/PE file 1 IoCs

flow	pid	Process
45	4572	Process not Found

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000e000000023ce7-1.dat	acprotect

Loads dropped DLL 3 IoCs

pid	Process
4944	2025-02-07_35699e47451db1d4750fed87bb48df11_bkransomware_floxif.exe
2256	Process not Found
4076	MicrosoftEdgeUpdate.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000e000000023ce7-1.dat	upx
behavioral2/memory/4944-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4944-8-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4076-12-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4076-13-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4076-16-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	2025-02-07_35699e47451db1d4750fed87bb48df11_bkransomware_floxif.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	2025-02-07_35699e47451db1d4750fed87bb48df11_bkransomware_floxif.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4076	MicrosoftEdgeUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4944	2025-02-07_35699e47451db1d4750fed87bb48df11_bkransomware_floxif.exe
Token: SeDebugPrivilege	4076	MicrosoftEdgeUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4944	2025-02-07_35699e47451db1d4750fed87bb48df11_bkransomware_floxif.exe

C:\Users\Admin\AppData\Local\Temp\2025-02-07_35699e47451db1d4750fed87bb48df11_bkransomware_floxif.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-07_35699e47451db1d4750fed87bb48df11_bkransomware_floxif.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4944

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIxIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU5MjEiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODE5ODA3NzAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1Mjk0Nzc3Mjk1Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Privilege Escalation

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

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/4076-12-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4076-13-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4076-14-0x00000000747B0000-0x00000000749D6000-memory.dmp

Filesize
2.1MB

Download
memory/4076-16-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4944-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4944-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4944-6-0x0000000000F70000-0x0000000001283000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing