floxif | acf87f6b345e8a552853427a3afad300388b3634d3f963eb027f457ca7a492e7

Analysis

max time kernel
91s
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
21-12-2024 22:57

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General

Target

acf87f6b345e8a552853427a3afad300388b3634d3f963eb027f457ca7a492e7.dll
Size

223KB
MD5

5b5a654b28f5a4787bbceca847423422
SHA1

56d3389143b0bbd7b7762766de78b46277fcbf69
SHA256

acf87f6b345e8a552853427a3afad300388b3634d3f963eb027f457ca7a492e7
SHA512

d3ea9c9a570507769076c034039b0af75cb2a6f1c2a3e4b0e66d58f88d27cb01bb57a0f3c270e613978bf47fb57ca6c8ba4543789c8550c13d6edf12b7336dce
SSDEEP

3072:6huf5AUWGIcv8JvK2ROAnAZdlGZxIOtY81fs2lQBV+UdE+rECWp7hK1al:ZBAUWGkVROYLIBV+UdvrEFp7hK0l

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/0x000c000000023b91-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b91-1.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
216	rundll32.exe
216	rundll32.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b91-1.dat	upx
behavioral2/memory/216-7-0x00000000012B0000-0x00000000012E0000-memory.dmp	upx
behavioral2/memory/216-6-0x00000000012B0000-0x00000000012E0000-memory.dmp	upx
behavioral2/memory/216-11-0x00000000012B0000-0x00000000012E0000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1376	216	WerFault.exe	83

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 use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	216	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3012 wrote to memory of 216	3012	rundll32.exe	83
PID 3012 wrote to memory of 216	3012	rundll32.exe	83
PID 3012 wrote to memory of 216	3012	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\acf87f6b345e8a552853427a3afad300388b3634d3f963eb027f457ca7a492e7.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3012
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\acf87f6b345e8a552853427a3afad300388b3634d3f963eb027f457ca7a492e7.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:216
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 216 -s 712
    3⤵
    - Program crash
    PID:1376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 216 -ip 216
1⤵
PID:5056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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/216-7-0x00000000012B0000-0x00000000012E0000-memory.dmp

Filesize
192KB

Download
memory/216-6-0x00000000012B0000-0x00000000012E0000-memory.dmp

Filesize
192KB

Download
memory/216-9-0x0000000010000000-0x0000000010025000-memory.dmp

Filesize
148KB

Download
memory/216-11-0x00000000012B0000-0x00000000012E0000-memory.dmp

Filesize
192KB

Download