floxif | d71289765d372ed0da256a9aa9bc60a9fa8785e04ae55f67ad3fc21aadccd987

Resubmissions

02/09/2024, 17:04

240902-vk8k2svfre10

02/09/2024, 16:58

240902-vgxpdavfna10

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02/09/2024, 16:58

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General

Target
202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe
Size 6.3MB
Sample240902-vgxpdavfna
SHA256 d71289765d372ed0da256a9aa9bc60a9fa8785e04ae55f67ad3fc21aadccd987
MD5 7c2b1e142d377bc5b9a021ec4e5b09b4
SHA1 9429bb84284296af48ddcfe0d99e741fdd1b7824
SHA512 537fa5262de408e81042217c61496ff6e8c3ebe13c0ada645210d7013a83901eb2037f396ccb964fb1577e412fea6cef69747e63680c0b4b47844317a836372a
SSDEEP 196608:7DXbNaDd/MmCp3XHUPXBs72S3CKCXCv2a/Am:7DXha5/MmCpH0PXOR39Uk20/
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

floxif backdoor discovery persistence privilege_escalation 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/0x00090000000233f0-1.dat	floxif

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00090000000233f0-1.dat	acprotect

Loads dropped DLL 5 IoCs

pid	Process
4672	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe
4436	WerFault.exe
212	WerFault.exe
5084	WerFault.exe
1172	WerFault.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00090000000233f0-1.dat	upx
behavioral2/memory/4672-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4672-17-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
212	4672	WerFault.exe	82
1172	4672	WerFault.exe	82

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	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\ProcessorNameString	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4672	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe
4672	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4672	202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe

C:\Users\Admin\AppData\Local\Temp\202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe
"C:\Users\Admin\AppData\Local\Temp\202409027c2b1e142d377bc5b9a021ec4e5b09b4floxifmafia.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4672
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4672 -s 1160
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:212
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4672 -s 1168
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:1172

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4672 -ip 4672
1⤵
- Loads dropped DLL
PID:4436

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4672 -ip 4672
1⤵
- Loads dropped DLL
PID:5084

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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/4672-4-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4672-6-0x00000000003A1000-0x00000000003A2000-memory.dmp

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memory/4672-17-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4672-15-0x00000000003A0000-0x00000000009DD000-memory.dmp

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