floxif | 7d2b284f266d1dca5b95a4b95746d2f3948769a7b6af2543df9edb94599afc82

Analysis

max time kernel
93s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24/12/2024, 23:49

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General

Target

7d2b284f266d1dca5b95a4b95746d2f3948769a7b6af2543df9edb94599afc82.dll
Size

163KB
MD5

f2e2ee0a9c73dd8735f561ba613864bd
SHA1

2d24826b40d1d67bb6ee3dd6b72849c95533a4d3
SHA256

7d2b284f266d1dca5b95a4b95746d2f3948769a7b6af2543df9edb94599afc82
SHA512

76d6aa20e2aec0693e5b277b0a9f1772ba4d6c230890e8311690f4b1fd610775e7e6b8eb5b91f0805e8d0bbc2ca18a452b0a6ee4fe3c508bc3678b8bfc13f670
SSDEEP

3072:UtvMVI+FQny5R6nG//SdaZwms/2lQBV+UdE+rECWp7hKBSUdlD:UtEWy5R6n26daZwmsBV+UdvrEFp7hKM0

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/0x0009000000023c82-1.dat	floxif

Blocklisted process makes network request 2 IoCs

flow	pid	Process
11	1864	rundll32.exe
18	1864	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023c82-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1864	rundll32.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:	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023c82-1.dat	upx
behavioral2/memory/1864-2-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1864-9-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	rundll32.exe

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	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1864	rundll32.exe
1864	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1864	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4508 wrote to memory of 1864	4508	rundll32.exe	82
PID 4508 wrote to memory of 1864	4508	rundll32.exe	82
PID 4508 wrote to memory of 1864	4508	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7d2b284f266d1dca5b95a4b95746d2f3948769a7b6af2543df9edb94599afc82.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4508
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\7d2b284f266d1dca5b95a4b95746d2f3948769a7b6af2543df9edb94599afc82.dll,#1
  2⤵
  - Blocklisted process makes network request
  - 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:1864

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/1864-2-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1864-9-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download