floxif | 681db6461e5a4889940053deeba92009e9f902dfb225ff1e35aa4011c04e9397

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11-12-2024 12:25

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General

Target

2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe
Size

4.7MB
MD5

38085eb1a832efcbc2217b0f862d7d65
SHA1

7c127b49b24ce4da1738600b9b0aa072f37d1253
SHA256

681db6461e5a4889940053deeba92009e9f902dfb225ff1e35aa4011c04e9397
SHA512

9991d1b24474a7a8f6673a345ae8ab1007429eec3e0811ea710b46f38b30025a0f63829949c5387d20ba17623e094ca5f8cbaf4fdcdbbb715421009cfb4a6241
SSDEEP

98304:kBe40bl9dRPenSX5gmoCP0DHDB1dE46V3u/N:h3NenGP8L/N

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/0x0009000000023c6b-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/0x0009000000023c6b-1.dat	acprotect

Loads dropped DLL 3 IoCs

pid	Process
1256	2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe
2108	WerFault.exe
4240	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:	2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023c6b-1.dat	upx
behavioral2/memory/1256-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1256-16-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4240	1256	WerFault.exe	82

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	2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1256	2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe
1256	2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe
1256	2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe
1256	2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1256	2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe

C:\Users\Admin\AppData\Local\Temp\2024-12-11_38085eb1a832efcbc2217b0f862d7d65_bkransomware_floxif.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-11_38085eb1a832efcbc2217b0f862d7d65_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:1256
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1256 -s 1272
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:4240

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1256 -ip 1256
1⤵
- Loads dropped DLL
PID:2108

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

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/1256-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1256-16-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1256-14-0x0000000000280000-0x0000000000741000-memory.dmp

Filesize
4.8MB

Download