floxif | a4e57a77add9875ea6c33def6effd66cf66ef64af9751b65731154eb3e58b119

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16/12/2024, 00:34

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General

Target

a4e57a77add9875ea6c33def6effd66cf66ef64af9751b65731154eb3e58b119N.dll
Size

2.0MB
MD5

9834fe83f154e2f9804e95b147d90f80
SHA1

85887668aebb8f09b46fd2b67553ecb760fe7db2
SHA256

a4e57a77add9875ea6c33def6effd66cf66ef64af9751b65731154eb3e58b119
SHA512

08aa66ec9fc89a61db930bf4d236a63057b93ab60052cdb0422e910daa0a7762c237ceb06910230f6f89124e46ae76d520f3b408d0043594d9df1b5ccbf6481f
SSDEEP

24576:UUtU6OIyl2Wy9M3bJ4UPS0zFZghQ6aOiFaKOE31GrvFXl74YZ29X1MDd6olmrBFK:U566l2u4+iNYFrz31Cv3D29kd6knf

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/0x000b000000023bc0-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000b000000023bc0-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1208	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000b000000023bc0-1.dat	upx
behavioral2/memory/1208-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1208-6-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	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 use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1208	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 944 wrote to memory of 1208	944	rundll32.exe	83
PID 944 wrote to memory of 1208	944	rundll32.exe	83
PID 944 wrote to memory of 1208	944	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a4e57a77add9875ea6c33def6effd66cf66ef64af9751b65731154eb3e58b119N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:944
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a4e57a77add9875ea6c33def6effd66cf66ef64af9751b65731154eb3e58b119N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1208

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/1208-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1208-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download