floxif | 891b0e447267fc9794a74a4f45182f25787a2c06793dad4dbc0b3361e5afd088

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
19/11/2024, 08:24

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General

Target

891b0e447267fc9794a74a4f45182f25787a2c06793dad4dbc0b3361e5afd088N.dll
Size

737KB
MD5

160f63d85a66075ad3d8bc56217f7650
SHA1

eac7e7e9eda41f84eff5749e144e29f7510d7645
SHA256

891b0e447267fc9794a74a4f45182f25787a2c06793dad4dbc0b3361e5afd088
SHA512

5a21773ac4f0e4b2d8e74acefcb02f0643a850de4366860177f9f708f5436618a8c384f23778a2b6be9bf7b65f569ef0e4aa5d738d94fa3022faea22f5d37201
SSDEEP

12288:DbeRcKArp9MmN2KxYUoGmchkFpPa3a4gEP/0ls58F888888888888W888888888n:DbeRcKwpidK+xGbkT0gmYarEH7V

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/0x000d0000000122e4-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000d0000000122e4-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
3004	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000d0000000122e4-1.dat	upx
behavioral1/memory/3004-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/3004-7-0x0000000010000000-0x0000000010030000-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
1732	3004	WerFault.exe	31

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	3004	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2568 wrote to memory of 3004	2568	rundll32.exe	31
PID 2568 wrote to memory of 3004	2568	rundll32.exe	31
PID 2568 wrote to memory of 3004	2568	rundll32.exe	31
PID 2568 wrote to memory of 3004	2568	rundll32.exe	31
PID 2568 wrote to memory of 3004	2568	rundll32.exe	31
PID 2568 wrote to memory of 3004	2568	rundll32.exe	31
PID 2568 wrote to memory of 3004	2568	rundll32.exe	31
PID 3004 wrote to memory of 1732	3004	rundll32.exe	32
PID 3004 wrote to memory of 1732	3004	rundll32.exe	32
PID 3004 wrote to memory of 1732	3004	rundll32.exe	32
PID 3004 wrote to memory of 1732	3004	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\891b0e447267fc9794a74a4f45182f25787a2c06793dad4dbc0b3361e5afd088N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2568
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\891b0e447267fc9794a74a4f45182f25787a2c06793dad4dbc0b3361e5afd088N.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:3004
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3004 -s 392
    3⤵
    - Program crash
    PID:1732

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

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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/3004-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3004-7-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3004-5-0x0000000000250000-0x0000000000303000-memory.dmp

Filesize
716KB

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