floxif | 3516abd3c6a59e3428264dd2ee027e197e62912eac1b02203c660600fa836971

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26-12-2024 21:16

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General

Target

3516abd3c6a59e3428264dd2ee027e197e62912eac1b02203c660600fa836971.dll
Size

832KB
MD5

1f9b310f68cb858d5adab2fe0bd05ae9
SHA1

761d36338374f58f82efb3d1cbd67edd4720d7d8
SHA256

3516abd3c6a59e3428264dd2ee027e197e62912eac1b02203c660600fa836971
SHA512

132cf463863a151110bec05b821df4b74a6f73d169ec0819a294532ee20f5b549f09b121e185e82bac7983eb68ef63a4ed0eefaf0a1212525c1a852b90ee137f
SSDEEP

12288:uKktdf3dzC37LG9oW7cH3SlOaYGXsVvVmPQFzf9BjvrEH7S:MLft0u9972S0a3edYufrEH7S

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/0x000e0000000122ed-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000e0000000122ed-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2176	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000e0000000122ed-1.dat	upx
behavioral1/memory/2176-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2176-7-0x0000000010000000-0x0000000010030000-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
2756	2176	WerFault.exe	31

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	2176	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2176	2280	rundll32.exe	31
PID 2280 wrote to memory of 2176	2280	rundll32.exe	31
PID 2280 wrote to memory of 2176	2280	rundll32.exe	31
PID 2280 wrote to memory of 2176	2280	rundll32.exe	31
PID 2280 wrote to memory of 2176	2280	rundll32.exe	31
PID 2280 wrote to memory of 2176	2280	rundll32.exe	31
PID 2280 wrote to memory of 2176	2280	rundll32.exe	31
PID 2176 wrote to memory of 2756	2176	rundll32.exe	32
PID 2176 wrote to memory of 2756	2176	rundll32.exe	32
PID 2176 wrote to memory of 2756	2176	rundll32.exe	32
PID 2176 wrote to memory of 2756	2176	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3516abd3c6a59e3428264dd2ee027e197e62912eac1b02203c660600fa836971.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3516abd3c6a59e3428264dd2ee027e197e62912eac1b02203c660600fa836971.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:2176
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2176 -s 276
    3⤵
    - Program crash
    PID:2756

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/2176-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2176-7-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2176-5-0x0000000074A40000-0x0000000074B16000-memory.dmp

Filesize
856KB

Download