floxif | 4fa3359245c615030183f1139c8367d89c2b87c138dde5a03b383bbd97ec326b

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
19-12-2024 20:20

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General

Target

4fa3359245c615030183f1139c8367d89c2b87c138dde5a03b383bbd97ec326bN.dll
Size

150KB
MD5

aa8ed3c2f7391422fdfa82a00a9b21c0
SHA1

2b847ccf0e9bdfda756a27ba07aeb33d629e9bd5
SHA256

4fa3359245c615030183f1139c8367d89c2b87c138dde5a03b383bbd97ec326b
SHA512

8de0c68048e766df99565818ba7e5388ce9307a035799a4556d0e7f539053082d4202ad43798b87f66bce1f50ba4189ec7bf8db095ac5c1697f3a4c6566bc61e
SSDEEP

3072:KHHImjKySdLcOi85ecbCKnN22lQBV+UdE+rECWp7hKosL2A:ZmWrjRecbC7BV+UdvrEFp7hKXLV

Score

10^/10

floxif backdoor discovery 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
behavioral1/files/0x000b000000012280-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000b000000012280-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
800	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000b000000012280-1.dat	upx
behavioral1/memory/800-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/800-5-0x0000000010000000-0x0000000010030000-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	800	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 800	2128	rundll32.exe	30
PID 2128 wrote to memory of 800	2128	rundll32.exe	30
PID 2128 wrote to memory of 800	2128	rundll32.exe	30
PID 2128 wrote to memory of 800	2128	rundll32.exe	30
PID 2128 wrote to memory of 800	2128	rundll32.exe	30
PID 2128 wrote to memory of 800	2128	rundll32.exe	30
PID 2128 wrote to memory of 800	2128	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4fa3359245c615030183f1139c8367d89c2b87c138dde5a03b383bbd97ec326bN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2128
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\4fa3359245c615030183f1139c8367d89c2b87c138dde5a03b383bbd97ec326bN.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:800

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

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Downloads

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/800-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/800-5-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download