floxif | 6abc778c25bdee662f6002a6fc4c8bf381d148950c488ad54c85d33f3ec08c30

Analysis

max time kernel
91s
max time network
16s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
01-01-2025 13:48

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General

Target

6abc778c25bdee662f6002a6fc4c8bf381d148950c488ad54c85d33f3ec08c30N.dll
Size

276KB
MD5

f159f4887e247b48370f39fe04f46220
SHA1

24df6eabe37ca56a174c8f595efc1becf2a1f30b
SHA256

6abc778c25bdee662f6002a6fc4c8bf381d148950c488ad54c85d33f3ec08c30
SHA512

bebc7216a8867a55173527319cdf77c71ab9eb192357efc9641a9a2a65dc95ab63ea5ef78dfcd3d3209b7f2144d9b99846a9555c86ee895cb2f32b0cc16730b3
SSDEEP

3072:cbcrMQD73Ygu9hDb2lQBV+UdE+rECWp7hKFk:QcrXo1FBV+UdvrEFp7hKFk

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/0x00080000000120fd-1.dat	floxif

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	2540	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x00080000000120fd-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2540	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
behavioral1/memory/2540-4-0x0000000000130000-0x0000000000160000-memory.dmp	upx
behavioral1/files/0x00080000000120fd-1.dat	upx
behavioral1/memory/2540-7-0x0000000000130000-0x0000000000160000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	\??\c:\program files\common files\system\symsrv.dll.000	rundll32.exe
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 behavior: EnumeratesProcesses 1 IoCs

pid	Process
2540	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2540	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 2540	2440	rundll32.exe	30
PID 2440 wrote to memory of 2540	2440	rundll32.exe	30
PID 2440 wrote to memory of 2540	2440	rundll32.exe	30
PID 2440 wrote to memory of 2540	2440	rundll32.exe	30
PID 2440 wrote to memory of 2540	2440	rundll32.exe	30
PID 2440 wrote to memory of 2540	2440	rundll32.exe	30
PID 2440 wrote to memory of 2540	2440	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6abc778c25bdee662f6002a6fc4c8bf381d148950c488ad54c85d33f3ec08c30N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\6abc778c25bdee662f6002a6fc4c8bf381d148950c488ad54c85d33f3ec08c30N.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:2540

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

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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/2540-4-0x0000000000130000-0x0000000000160000-memory.dmp

Filesize
192KB

Download
memory/2540-3-0x0000000010001000-0x0000000010002000-memory.dmp

Filesize
4KB

Download
memory/2540-7-0x0000000000130000-0x0000000000160000-memory.dmp

Filesize
192KB

Download