floxif | 3ee6be4feeccf58b31e8c37983cddf8b39cbebf1c1604ae74d5df2cf8c6d27d2

Analysis

max time kernel
92s
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
01-01-2025 17:48

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General

Target

3ee6be4feeccf58b31e8c37983cddf8b39cbebf1c1604ae74d5df2cf8c6d27d2.dll
Size

532KB
MD5

1fc9624a8430d580eb78fa8008cd615f
SHA1

4bca1e20fc28dbe67ae40b1847e8986570551ba1
SHA256

3ee6be4feeccf58b31e8c37983cddf8b39cbebf1c1604ae74d5df2cf8c6d27d2
SHA512

8501e398e46b014542c84fc6af1467258400133ab6fe75c95ba343875b51dfc003a294046e9f53b9943e31e53b40a71f83a7ba4f04e9991eedefae3432c89d9e
SSDEEP

6144:xlXqlvw5wsJnpICn19KkBNrxRQwH/VmVm73bj6yO+B0xl3Jwtt/MCxryZ6qAsys9:x19JpdDR+43j6yIlZwL/JryBAC3ZJV

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
behavioral2/files/0x0032000000023b80-7.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0032000000023b80-7.dat	acprotect

Executes dropped EXE 1 IoCs

pid	Process
456	rundll32mgr.exe

Loads dropped DLL 1 IoCs

pid	Process
456	rundll32mgr.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32mgr.exe	rundll32.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b21-4.dat	upx
behavioral2/memory/456-6-0x0000000000400000-0x0000000000463000-memory.dmp	upx
behavioral2/files/0x0032000000023b80-7.dat	upx
behavioral2/memory/456-10-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/456-15-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/456-13-0x0000000000400000-0x0000000000463000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32mgr.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3288	456	WerFault.exe	85

System Location Discovery: System Language Discovery 1 TTPs 2 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32mgr.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	456	rundll32mgr.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 316 wrote to memory of 1992	316	rundll32.exe	84
PID 316 wrote to memory of 1992	316	rundll32.exe	84
PID 316 wrote to memory of 1992	316	rundll32.exe	84
PID 1992 wrote to memory of 456	1992	rundll32.exe	85
PID 1992 wrote to memory of 456	1992	rundll32.exe	85
PID 1992 wrote to memory of 456	1992	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3ee6be4feeccf58b31e8c37983cddf8b39cbebf1c1604ae74d5df2cf8c6d27d2.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:316
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3ee6be4feeccf58b31e8c37983cddf8b39cbebf1c1604ae74d5df2cf8c6d27d2.dll,#1
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1992
- - C:\Windows\SysWOW64\rundll32mgr.exe
    C:\Windows\SysWOW64\rundll32mgr.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:456
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 456 -s 388
      4⤵
      Program crash
      PID:3288

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 456 -ip 456
1⤵
PID:1156

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

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
C:\Windows\SysWOW64\rundll32mgr.exe

Filesize
209KB

MD5
59859a109082f7ce78fd48ae3c8b1441

SHA1
26aa26e72ac325967937afa567ac3b043ee06464

SHA256
1b9874755981b2183c3d2fdd25f4f09d869484dbc6643c4b62cea86e7b9fc39a

SHA512
5943a6829eeb75e23bc4f9d878dbd51629c7a9fafae913d9c3037a6b0f328708aae452b2bbc3696d7c89d47690295dceddbdcf77b1623ce7fc629cb4c21841a8

Download Submit
memory/456-6-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/456-10-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/456-12-0x00000000020D0000-0x00000000020D1000-memory.dmp

Filesize
4KB

Download
memory/456-15-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/456-13-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/1992-0-0x0000000074E80000-0x0000000074F0C000-memory.dmp

Filesize
560KB

Download