floxif | fdd9e017f109ffb2a94f9a0c9ce640fa81142bb09e2a82e7a68c29daedace5b8

Analysis

max time kernel
96s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
08/09/2024, 16:26

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General

Target
fdd9e017f109ffb2a94f9a0c9ce640fa81142bb09e2a82e7a68c29daedace5b8.dll
Size 327KB
Sample240908-txvdhswbkl
SHA256 fdd9e017f109ffb2a94f9a0c9ce640fa81142bb09e2a82e7a68c29daedace5b8
MD5 79cf280d7409087bf1871f8d26be5e72
SHA1 440d2364c8320aab9a18c8809934eff5f53ce830
SHA512 fe99d23f7c68c19670945a613cdf62513eacd268120d5d41d388462075cab3edd1516642adf6cebd5b1531d861bf17919237ec4a4596b902e29766b91dce0458
SSDEEP 6144:SwUTKlzUfj4pGAOmuCIBcSTO8+OKFZpQBV+UdvrEFp7hKs8:bsK+fj44AbbIBcSTO8qQBjvrEH7c
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/0x0009000000023419-1.dat	floxif

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 1 IoCs

pid	Process
4008	rundll32.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/4008-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4008-6-0x0000000010000000-0x0000000010030000-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

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	4008	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3092 wrote to memory of 4008	3092	rundll32.exe	83
PID 3092 wrote to memory of 4008	3092	rundll32.exe	83
PID 3092 wrote to memory of 4008	3092	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fdd9e017f109ffb2a94f9a0c9ce640fa81142bb09e2a82e7a68c29daedace5b8.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3092
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fdd9e017f109ffb2a94f9a0c9ce640fa81142bb09e2a82e7a68c29daedace5b8.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4008

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

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

Submit Download

memory/4008-4-0x0000000010000000-0x0000000010030000-memory.dmp

Download

memory/4008-6-0x0000000010000000-0x0000000010030000-memory.dmp