floxif | 38196c74d1b76f66dacff09fd0103546460d9b14e55929fbe8383f938d9abdea

Analysis

max time kernel
14s
max time network
18s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
17-12-2024 10:03

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General

Target

38196c74d1b76f66dacff09fd0103546460d9b14e55929fbe8383f938d9abdeaN.dll
Size

150KB
MD5

00972d2f233a08d03dfb0a0742fac990
SHA1

91e25ffc6725086d7148da88522837c1bbdceaf6
SHA256

38196c74d1b76f66dacff09fd0103546460d9b14e55929fbe8383f938d9abdea
SHA512

1e17531b06f98901758e131c9e081dba843bc9423d353147fbf80ebe0109f1a39601d76f36325336ee38614dc077c1ba8eb5a8cfb0352be6d7054f27d4d19aad
SSDEEP

3072:KHHZMR/2dLcOim5ecbCKnN22lQBV+UdE+rECWp7hKMG6:pkjjecbC7BV+UdvrEFp7hKY

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/0x000c000000012262-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000c000000012262-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2124	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000c000000012262-1.dat	upx
behavioral1/memory/2124-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2124-6-0x0000000010000000-0x0000000010030000-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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2832	2124	WerFault.exe	30

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	2124	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 2124	2820	rundll32.exe	30
PID 2820 wrote to memory of 2124	2820	rundll32.exe	30
PID 2820 wrote to memory of 2124	2820	rundll32.exe	30
PID 2820 wrote to memory of 2124	2820	rundll32.exe	30
PID 2820 wrote to memory of 2124	2820	rundll32.exe	30
PID 2820 wrote to memory of 2124	2820	rundll32.exe	30
PID 2820 wrote to memory of 2124	2820	rundll32.exe	30
PID 2124 wrote to memory of 2832	2124	rundll32.exe	31
PID 2124 wrote to memory of 2832	2124	rundll32.exe	31
PID 2124 wrote to memory of 2832	2124	rundll32.exe	31
PID 2124 wrote to memory of 2832	2124	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\38196c74d1b76f66dacff09fd0103546460d9b14e55929fbe8383f938d9abdeaN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2820
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\38196c74d1b76f66dacff09fd0103546460d9b14e55929fbe8383f938d9abdeaN.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2124
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2124 -s 280
    3⤵
    - Program crash
    PID:2832

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/2124-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2124-5-0x00000000753F0000-0x0000000075404000-memory.dmp

Filesize
80KB

Download
memory/2124-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download