floxif | 6340a1b436e0d1f6d5a8d2b2933bcf6d7655923e847982c5d34c5abcd5c94311

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
31-12-2024 07:28

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General

Target

2024-12-31_2707282115cfbd608781d5520bf7d86b_bkransomware_floxif.exe
Size

4.7MB
MD5

2707282115cfbd608781d5520bf7d86b
SHA1

ad48869dc99046faec30db7f012458d9b54173c5
SHA256

6340a1b436e0d1f6d5a8d2b2933bcf6d7655923e847982c5d34c5abcd5c94311
SHA512

ae7c46b285a4c60a289a63e25218126b53bf00822274059fa1b5bd893f87abf0ea16be249523933c0e2eccbd9cd3817abd3aa42492c8fa58990e70ade8d309e3
SSDEEP

98304:kBe40bl9dRPenSX5gpoCU0DHDB1dE46V3u/vi:h3NenhU8L/K

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/0x0009000000023c54-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023c54-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1724	2024-12-31_2707282115cfbd608781d5520bf7d86b_bkransomware_floxif.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:	2024-12-31_2707282115cfbd608781d5520bf7d86b_bkransomware_floxif.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023c54-1.dat	upx
behavioral2/memory/1724-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1724-14-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	2024-12-31_2707282115cfbd608781d5520bf7d86b_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
4528	1724	WerFault.exe	81
3184	1724	WerFault.exe	81

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	2024-12-31_2707282115cfbd608781d5520bf7d86b_bkransomware_floxif.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1724	2024-12-31_2707282115cfbd608781d5520bf7d86b_bkransomware_floxif.exe
1724	2024-12-31_2707282115cfbd608781d5520bf7d86b_bkransomware_floxif.exe
1724	2024-12-31_2707282115cfbd608781d5520bf7d86b_bkransomware_floxif.exe
1724	2024-12-31_2707282115cfbd608781d5520bf7d86b_bkransomware_floxif.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1724	2024-12-31_2707282115cfbd608781d5520bf7d86b_bkransomware_floxif.exe

C:\Users\Admin\AppData\Local\Temp\2024-12-31_2707282115cfbd608781d5520bf7d86b_bkransomware_floxif.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-31_2707282115cfbd608781d5520bf7d86b_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:1724
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1724 -s 1240
  2⤵
  - Program crash
  PID:4528
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1724 -s 1272
  2⤵
  - Program crash
  PID:3184

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1724 -ip 1724
1⤵
PID:5064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 1724 -ip 1724
1⤵
PID:4592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

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

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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/1724-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1724-14-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1724-12-0x00000000008E0000-0x0000000000DA1000-memory.dmp

Filesize
4.8MB

Download