floxif | ad51d198487e14e14e004c4ec9ebc79e726991042a216965fcf2da1a26886dbb

Analysis

max time kernel
101s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
15/08/2024, 16:30

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General

Target
f9f90cfe72b7e6f43d8d9431568f9440N.exe
Size 2.7MB
Sample240815-tz7rmawdql
SHA256 ad51d198487e14e14e004c4ec9ebc79e726991042a216965fcf2da1a26886dbb
MD5 f9f90cfe72b7e6f43d8d9431568f9440
SHA1 5608aef2e5b974300fd0666c58733210dd0991bf
SHA512 6e0420cef341c32075040bf3d11fbd01ee11c3b30abd87b7ff03fd9834d85ea06fa7461276be0761aed8118841c11865b6d927926a8a9e0c468c2ae0afa1dee1
SSDEEP 49152:zPE6vXDUOYQMqclLb0wsXuhXabboP4ACQDAknmCwlzI8ndVyw+AZ/WY4N2WwW/KN:LFvXfMFLbSXuhXa/oP4ACYAknmCMICy+
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/0x0009000000023383-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023383-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
3408	f9f90cfe72b7e6f43d8d9431568f9440N.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023383-1.dat	upx
behavioral2/memory/3408-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3408-9-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	f9f90cfe72b7e6f43d8d9431568f9440N.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
528	3408	WerFault.exe	83
2648	3408	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	f9f90cfe72b7e6f43d8d9431568f9440N.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3408	f9f90cfe72b7e6f43d8d9431568f9440N.exe
3408	f9f90cfe72b7e6f43d8d9431568f9440N.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3408	f9f90cfe72b7e6f43d8d9431568f9440N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3408	f9f90cfe72b7e6f43d8d9431568f9440N.exe

C:\Users\Admin\AppData\Local\Temp\f9f90cfe72b7e6f43d8d9431568f9440N.exe
"C:\Users\Admin\AppData\Local\Temp\f9f90cfe72b7e6f43d8d9431568f9440N.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3408
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3408 -s 824
  2⤵
  - Program crash
  PID:528
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3408 -s 832
  2⤵
  - Program crash
  PID:2648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3408 -ip 3408
1⤵
PID:1800

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3408 -ip 3408
1⤵
PID:1368

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/3408-4-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/3408-6-0x0000000000631000-0x0000000000632000-memory.dmp

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memory/3408-9-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/3408-7-0x0000000000630000-0x00000000008D8000-memory.dmp

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