floxif | 33e347afd07325d3d0ab0cd2ba17db5bddb4997f090753fb59f5ba75f5fc3c96

Analysis

max time kernel
150s
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
10-12-2024 07:33

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General

Target

2024-12-10_5c33d0684927b54587e18f002eba40c1_bkransomware_floxif.exe
Size

4.7MB
MD5

5c33d0684927b54587e18f002eba40c1
SHA1

c29369056295a77d6422c8898361d55f1ba5c44d
SHA256

33e347afd07325d3d0ab0cd2ba17db5bddb4997f090753fb59f5ba75f5fc3c96
SHA512

39af66ad13ea8feda55763361473403ea526402235636c9d01b36fa372b35f8ecc8bd382286bf081cce2baec0303afd26542c5a6e20e95c45c0ef4644b8c79b2
SSDEEP

98304:kBe40bl9dRPenSX5gSoCi0DHV1dE46V3u/f:h3NenqioL/f

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/0x000c000000023b2e-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b2e-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1044	2024-12-10_5c33d0684927b54587e18f002eba40c1_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:	2024-12-10_5c33d0684927b54587e18f002eba40c1_bkransomware_floxif.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b2e-1.dat	upx
behavioral2/memory/1044-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1044-14-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	2024-12-10_5c33d0684927b54587e18f002eba40c1_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
1324	1044	WerFault.exe	81
2784	1044	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	2024-12-10_5c33d0684927b54587e18f002eba40c1_bkransomware_floxif.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1044	2024-12-10_5c33d0684927b54587e18f002eba40c1_bkransomware_floxif.exe
1044	2024-12-10_5c33d0684927b54587e18f002eba40c1_bkransomware_floxif.exe
1044	2024-12-10_5c33d0684927b54587e18f002eba40c1_bkransomware_floxif.exe
1044	2024-12-10_5c33d0684927b54587e18f002eba40c1_bkransomware_floxif.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1044	2024-12-10_5c33d0684927b54587e18f002eba40c1_bkransomware_floxif.exe

C:\Users\Admin\AppData\Local\Temp\2024-12-10_5c33d0684927b54587e18f002eba40c1_bkransomware_floxif.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-10_5c33d0684927b54587e18f002eba40c1_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:1044
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1044 -s 1252
  2⤵
  - Program crash
  PID:1324
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1044 -s 1276
  2⤵
  - Program crash
  PID:2784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1044 -ip 1044
1⤵
PID:3604

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1044 -ip 1044
1⤵
PID:2044

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

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/1044-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1044-12-0x0000000000370000-0x0000000000831000-memory.dmp

Filesize
4.8MB

Download
memory/1044-14-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download