floxif | c73b3d21b3bf6e59adf63b2fc91102f855fea95797e6ecf6724a9cb5f177466a

Analysis

max time kernel
17s
max time network
17s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
02/01/2025, 10:43

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General

Target

c73b3d21b3bf6e59adf63b2fc91102f855fea95797e6ecf6724a9cb5f177466aN.dll
Size

150KB
MD5

41b8177ed9d7d62da7cf726ab8409270
SHA1

6b2e55362ca9f8d207a9fefa1c3fbb80b3ce7bfc
SHA256

c73b3d21b3bf6e59adf63b2fc91102f855fea95797e6ecf6724a9cb5f177466a
SHA512

5bb42100413eaa5b5136fb70c48199f6e2f310f6e75cce34a18099f984883b8f8d1dd56545455eec51c8ea76f56193c6b22b260336d139c796f6f615ed63898a
SSDEEP

3072:KHHZMRNjKySd6yS5ecbCKnN22lQBV+UdE+rECWp7hKm5o7QY:TWa7ecbC7BV+UdvrEFp7hK2o7T

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
behavioral1/files/0x000a00000001202c-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000a00000001202c-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
344	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000a00000001202c-1.dat	upx
behavioral1/memory/344-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/344-7-0x0000000010000000-0x0000000010030000-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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2540	344	WerFault.exe	30

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	344	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 344	1740	rundll32.exe	30
PID 1740 wrote to memory of 344	1740	rundll32.exe	30
PID 1740 wrote to memory of 344	1740	rundll32.exe	30
PID 1740 wrote to memory of 344	1740	rundll32.exe	30
PID 1740 wrote to memory of 344	1740	rundll32.exe	30
PID 1740 wrote to memory of 344	1740	rundll32.exe	30
PID 1740 wrote to memory of 344	1740	rundll32.exe	30
PID 344 wrote to memory of 2540	344	rundll32.exe	31
PID 344 wrote to memory of 2540	344	rundll32.exe	31
PID 344 wrote to memory of 2540	344	rundll32.exe	31
PID 344 wrote to memory of 2540	344	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c73b3d21b3bf6e59adf63b2fc91102f855fea95797e6ecf6724a9cb5f177466aN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c73b3d21b3bf6e59adf63b2fc91102f855fea95797e6ecf6724a9cb5f177466aN.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:344
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 344 -s 268
    3⤵
    - Program crash
    PID:2540

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

\Program Files\Common Files\System\symsrv.dll

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/344-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/344-5-0x0000000074590000-0x00000000745A4000-memory.dmp

Filesize
80KB

Download
memory/344-7-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download