floxif | 3385bfb2793be49c5ba2dec4c845532a50ef2dc671f4decb0e8276b76616ded8

Analysis

max time kernel
93s
max time network
101s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
05/07/2024, 14:09

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General

Target

3385bfb2793be49c5ba2dec4c845532a50ef2dc671f4decb0e8276b76616ded8.dll
Size

958KB
MD5

8951e35733c1d7721037462972c0d41f
SHA1

f8e42a89e18031efc7f86bb04eb71e22f6224b01
SHA256

3385bfb2793be49c5ba2dec4c845532a50ef2dc671f4decb0e8276b76616ded8
SHA512

4632c550c0c71542aec229d131d2a53276a7e84cec414835b286e36bbb2d2bc4a67d834ef25e3b11d010ed3b2a69c28db5b4764875fe129685356071235b7639
SSDEEP

24576:Ynl6ZxpoPm5YXvr4THcZcS3CkKGrBrEH7r:m4T8Z+YrU

Score

10^/10

floxif backdoor 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/0x0007000000022f55-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0007000000022f55-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4868	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0007000000022f55-1.dat	upx
behavioral2/memory/4868-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4868-8-0x0000000010000000-0x0000000010030000-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 2 IoCs

pid	pid_target	Process	procid_target
5068	4868	WerFault.exe	83
5048	4868	WerFault.exe	83

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4868	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 4868	2268	rundll32.exe	83
PID 2268 wrote to memory of 4868	2268	rundll32.exe	83
PID 2268 wrote to memory of 4868	2268	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3385bfb2793be49c5ba2dec4c845532a50ef2dc671f4decb0e8276b76616ded8.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2268
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3385bfb2793be49c5ba2dec4c845532a50ef2dc671f4decb0e8276b76616ded8.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  PID:4868
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4868 -s 808
    3⤵
    - Program crash
    PID:5068
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4868 -s 856
    3⤵
    - Program crash
    PID:5048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4868 -ip 4868
1⤵
PID:4176

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 4868 -ip 4868
1⤵
PID:3236

Network

MITRE ATT&CK Matrix

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/4868-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4868-5-0x0000000075821000-0x0000000075822000-memory.dmp

Filesize
4KB

Download
memory/4868-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4868-7-0x0000000075820000-0x00000000758FD000-memory.dmp

Filesize
884KB

Download