floxif | 867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
16/08/2024, 14:32

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General

Target
867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e.exe
Size 2.5MB
Sample240816-rwh8razckf
SHA256 867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e
MD5 bec3dbbf30ea2b5153052aaa84a9d87a
SHA1 e102c10564f9a9dbad6559931e8c6ac1c2f33f91
SHA512 88daef0e55f19c2446770f34cc9ede6c5bf05b6fc675c2668dca17eae1ac16cfba12b8dc9b3baec258b2d5233879c21cd3cda63a2dfb86d63be8b3dbfc135804
SSDEEP 49152:tuIkKzofs2hPd2l177BTK2VbDsar1YDj0:tjWfs2hPIl1/X
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/0x00090000000234a6-1.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/0x00090000000234a6-1.dat	acprotect

Loads dropped DLL 7 IoCs

pid	Process
4856	867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e.exe
3816	WerFault.exe
544	WerFault.exe
1816	WerFault.exe
5016	WerFault.exe
5040	WerFault.exe
4500	WerFault.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00090000000234a6-1.dat	upx
behavioral2/memory/4856-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4856-18-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e.exe

Program crash 3 IoCs

pid	pid_target	Process	procid_target
1816	4856	WerFault.exe	83
5016	4856	WerFault.exe	83
4500	4856	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	867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4856	867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e.exe
4856	867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4856	867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e.exe

C:\Users\Admin\AppData\Local\Temp\867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e.exe
"C:\Users\Admin\AppData\Local\Temp\867dd4de518560699145549b8cd517820626160a0c7d6dffae35341572a8c55e.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4856
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4856 -s 832
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:1816
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4856 -s 908
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:5016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4856 -s 840
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:4500

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4856 -ip 4856
1⤵
- Loads dropped DLL
PID:3816

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4856 -ip 4856
1⤵
- Loads dropped DLL
PID:544

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 4856 -ip 4856
1⤵
- Loads dropped DLL
PID:5040

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

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/4856-4-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4856-6-0x0000000000BA1000-0x0000000000BA2000-memory.dmp

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memory/4856-18-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4856-16-0x0000000000BA0000-0x0000000000E0A000-memory.dmp

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