floxif | 8d807ffb5a1e3ef507623bdd3401335090dd4e0484e325680aa3d25125432287

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
18-12-2024 09:07

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General

Target

8d807ffb5a1e3ef507623bdd3401335090dd4e0484e325680aa3d25125432287N.dll
Size

130KB
MD5

867e13c7da936c97250dcb5525b2a460
SHA1

debfe70fc60711e7a0c8fc006e226a91ba52af3d
SHA256

8d807ffb5a1e3ef507623bdd3401335090dd4e0484e325680aa3d25125432287
SHA512

63bbf5195d3d3d929ddd197eb1e025cd1a3c771d3cc16e0c03f3fb834ff5c0bf04ebb0b4332098163997a8c6c59d03a0df41198c07d6cf925688a199dc30bd6f
SSDEEP

3072:2nKe1Z7nXvG3BAC2lQBV+UdE+rECWp7hKkC:yKwZ7n/6fBV+UdvrEFp7hKkC

Score

10^/10

floxif backdoor discovery persistence privilege_escalation trojan upx

Malware Config

Signatures

Floxif family
floxif
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/0x000b000000023b63-1.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/0x000b000000023b63-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1808	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000b000000023b63-1.dat	upx
behavioral2/memory/1808-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1808-6-0x0000000010000000-0x0000000010030000-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	1808	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4088 wrote to memory of 1808	4088	rundll32.exe	82
PID 4088 wrote to memory of 1808	4088	rundll32.exe	82
PID 4088 wrote to memory of 1808	4088	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8d807ffb5a1e3ef507623bdd3401335090dd4e0484e325680aa3d25125432287N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4088
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8d807ffb5a1e3ef507623bdd3401335090dd4e0484e325680aa3d25125432287N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1808

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

Replay Monitor

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Downloads

C:\Program Files\Common Files\System\symsrv.dll

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/1808-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1808-5-0x0000000074BF1000-0x0000000074BF2000-memory.dmp

Filesize
4KB

Download
memory/1808-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download