floxif | 567708e687f97507dd0717a4642df21af2872c6f96eb6897c5acfdcb1d92b4d9

Analysis

max time kernel
94s
max time network
104s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
10/09/2024, 21:49

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General

Target
567708e687f97507dd0717a4642df21af2872c6f96eb6897c5acfdcb1d92b4d9.dll
Size 2.6MB
Sample240910-1pp76aycjc
SHA256 567708e687f97507dd0717a4642df21af2872c6f96eb6897c5acfdcb1d92b4d9
MD5 a103ef2cfb3a0811a54c1f070dabe181
SHA1 a8022491d23b3fad8815154480b0abe192bbc99f
SHA512 d66362d81ddd2c49cab1f4994e4da8732c11d34c128e6462e4334e47f97e8644c62812a2f3ef1013b4378c1397789405a5359c82db720815bb0ece6f0bcbbb90
SSDEEP 49152:qd0krhjbVYU9U/ElyrLKlvGBO5KGBjG9nYM6JB84PjnhMsQHNClhIdYTf2O+yX3w:PkrRyylvGB6LYNCCghMtHIledkp+Rj
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

floxif backdoor discovery trojan upx

Malware Config

Signatures

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/0x0009000000023408-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023408-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4824	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023408-1.dat	upx
behavioral2/memory/4824-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4824-8-0x0000000010000000-0x0000000010030000-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
4936	4824	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	4824	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3012 wrote to memory of 4824	3012	rundll32.exe	83
PID 3012 wrote to memory of 4824	3012	rundll32.exe	83
PID 3012 wrote to memory of 4824	3012	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\567708e687f97507dd0717a4642df21af2872c6f96eb6897c5acfdcb1d92b4d9.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3012
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\567708e687f97507dd0717a4642df21af2872c6f96eb6897c5acfdcb1d92b4d9.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4824
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4824 -s 716
    3⤵
    - Program crash
    PID:4936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4824 -ip 4824
1⤵
PID:4584

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

symsrv.dll

Path C:\Program Files\Common Files\System\symsrv.dll
Size 67KB
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab
SSDEEP 1536:YjV8y93KQpFQmPLRk7G50zy/riF12jvRyo0hQk7ZL:c8y93KQjy7G55riF1cMo03V
MD5 SHA1 SHA512 SSDEEP

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memory/4824-4-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4824-6-0x00000000755B0000-0x000000007584C000-memory.dmp

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memory/4824-8-0x0000000010000000-0x0000000010030000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads