floxif | 92300bd3a47ff876e49a2c7766c36157aadd8234e285771769d2889bc9f523f5

Analysis

max time kernel
119s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26/08/2024, 15:50

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General

Target
0543cff6e8fca7531fbe7dad6507fd50N.dll
Size 1.0MB
Sample240826-taa2cstbpr
SHA256 92300bd3a47ff876e49a2c7766c36157aadd8234e285771769d2889bc9f523f5
MD5 0543cff6e8fca7531fbe7dad6507fd50
SHA1 0ea6f01eaf9456c776e588b4282e9196deb52c56
SHA512 3fbe12855427aea3274adac004839b4ed05b64e8a085e0d9df5aaec35d5d521e22e0192d8f52c18056c56acabf7eb1e7b02939d5426417b0af48ac00a6091eb7
SSDEEP 24576:G8CBXfuy2Byhy/SUihhQlGSMlVvVADZQ1y0wXXz1f9qOtp5RwdnWvdeL6JKyzor8:7IfhhaK4ZZzundGJr
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/0x0009000000023419-1.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/0x0009000000023419-1.dat	acprotect

Loads dropped DLL 3 IoCs

pid	Process
404	rundll32.exe
2236	WerFault.exe
3704	WerFault.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023419-1.dat	upx
behavioral2/memory/404-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/404-10-0x0000000010000000-0x0000000010030000-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
3704	404	WerFault.exe	84

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	404	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 916 wrote to memory of 404	916	rundll32.exe	84
PID 916 wrote to memory of 404	916	rundll32.exe	84
PID 916 wrote to memory of 404	916	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0543cff6e8fca7531fbe7dad6507fd50N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:916
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\0543cff6e8fca7531fbe7dad6507fd50N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:404
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 404 -s 700
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:3704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 404 -ip 404
1⤵
- Loads dropped DLL
PID:2236

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/404-4-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/404-8-0x00000000748C0000-0x00000000749B3000-memory.dmp

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memory/404-10-0x0000000010000000-0x0000000010030000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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