floxif | fe6d37543bd62c6e747200e6c15cf4b9c1d9f01deaa18b50b98b5f9d1d29ca6d

Analysis

max time kernel
16s
max time network
16s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
01/01/2025, 00:50

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General

Target

fe6d37543bd62c6e747200e6c15cf4b9c1d9f01deaa18b50b98b5f9d1d29ca6dN.dll
Size

133KB
MD5

fa4068af24b561ba1fed576a4d425c00
SHA1

500fd0a4501433b8ec5c258ad852e595a687da7b
SHA256

fe6d37543bd62c6e747200e6c15cf4b9c1d9f01deaa18b50b98b5f9d1d29ca6d
SHA512

95606bf622ac38dd58a638361583340179230450b328f461b1ff476edfcdf4e7150d8040ed0199e858de8365699fa0202264dd67ef508de8488ced3695687237
SSDEEP

1536:s0rCGdqi981XABsb30TN2s+zheW6BVrqzCJ3bdDY+W14N4NmzWlIA7hKRQv/zgIj:nC31l3q2lQBV+UdE+rECWp7hK2/zbj

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/0x000a00000001225f-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000a00000001225f-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2524	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2524-3-0x00000000006A0000-0x00000000006D0000-memory.dmp	upx
behavioral1/files/0x000a00000001225f-1.dat	upx
behavioral1/memory/2524-13-0x00000000006A0000-0x00000000006D0000-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 behavior: EnumeratesProcesses 8 IoCs

pid	Process
2524	rundll32.exe
2524	rundll32.exe
2524	rundll32.exe
2524	rundll32.exe
2524	rundll32.exe
2524	rundll32.exe
2524	rundll32.exe
2524	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2524	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2408 wrote to memory of 2524	2408	rundll32.exe	30
PID 2408 wrote to memory of 2524	2408	rundll32.exe	30
PID 2408 wrote to memory of 2524	2408	rundll32.exe	30
PID 2408 wrote to memory of 2524	2408	rundll32.exe	30
PID 2408 wrote to memory of 2524	2408	rundll32.exe	30
PID 2408 wrote to memory of 2524	2408	rundll32.exe	30
PID 2408 wrote to memory of 2524	2408	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fe6d37543bd62c6e747200e6c15cf4b9c1d9f01deaa18b50b98b5f9d1d29ca6dN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2408
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fe6d37543bd62c6e747200e6c15cf4b9c1d9f01deaa18b50b98b5f9d1d29ca6dN.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2524

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

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/2524-3-0x00000000006A0000-0x00000000006D0000-memory.dmp

Filesize
192KB

Download
memory/2524-4-0x0000000000190000-0x0000000000191000-memory.dmp

Filesize
4KB

Download
memory/2524-6-0x0000000000670000-0x0000000000671000-memory.dmp

Filesize
4KB

Download
memory/2524-7-0x0000000000680000-0x0000000000681000-memory.dmp

Filesize
4KB

Download
memory/2524-8-0x00000000006D0000-0x00000000006D1000-memory.dmp

Filesize
4KB

Download
memory/2524-9-0x00000000006E0000-0x00000000006E1000-memory.dmp

Filesize
4KB

Download
memory/2524-10-0x0000000000880000-0x0000000000881000-memory.dmp

Filesize
4KB

Download
memory/2524-11-0x0000000000920000-0x0000000000921000-memory.dmp

Filesize
4KB

Download
memory/2524-12-0x0000000001F70000-0x0000000001F71000-memory.dmp

Filesize
4KB

Download
memory/2524-13-0x00000000006A0000-0x00000000006D0000-memory.dmp

Filesize
192KB

Download