floxif | bafb13272bf50d23101641aefb6a808a59e89df79189e0d42b47fc8e6369977c

General

Target

2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe
Size

4.7MB
MD5

5c92f41b3d5766a5f98ad093dae532a2
SHA1

3d3fbc9bc6c469ae4d37c89be0b1398d747075e2
SHA256

bafb13272bf50d23101641aefb6a808a59e89df79189e0d42b47fc8e6369977c
SHA512

1f811a2c0319954d3a489e64478335c9cb950b0e4e0f04946a2617b08e445dadaf4ca4b9488db365fa448fd6b10db0df8391269389bea8548968bd36661d4a27
SSDEEP

98304:kBe401l9dRPenSX5gSoCM0DHDB1dE46V3u/l:hFNenqM8L/l

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/0x000c000000023b2f-1.dat	floxif

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/0x000c000000023b2f-1.dat	acprotect

Loads dropped DLL 5 IoCs

pid	Process
3888	2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe
3752	WerFault.exe
5028	WerFault.exe
4484	WerFault.exe
3276	WerFault.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\e:	2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b2f-1.dat	upx
behavioral2/memory/3888-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3888-18-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
5028	3888	WerFault.exe	84
3276	3888	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	2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3888	2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe
3888	2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe
3888	2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe
3888	2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3888	2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe

C:\Users\Admin\AppData\Local\Temp\2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-23_5c92f41b3d5766a5f98ad093dae532a2_bkransomware_floxif.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3888
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3888 -s 1268
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:5028
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3888 -s 1276
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:3276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3888 -ip 3888
1⤵
- Loads dropped DLL
PID:3752

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3888 -ip 3888
1⤵
- Loads dropped DLL
PID:4484

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

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

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/3888-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3888-18-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3888-16-0x0000000000550000-0x0000000000A11000-memory.dmp

Filesize
4.8MB

Download

Analysis

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