floxif | 063fdb320a5e8b9fb9f237f1000eabd15dc8c702430c19df8bdb764818d61a62

Analysis

max time kernel
130s
max time network
143s
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, 18:22

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General

Target

063fdb320a5e8b9fb9f237f1000eabd15dc8c702430c19df8bdb764818d61a62.dll
Size

1.3MB
MD5

196bf823971f1470f230d96342aa53ec
SHA1

94e266a4b5bd10f5d74e61fb859eeb5338bfd879
SHA256

063fdb320a5e8b9fb9f237f1000eabd15dc8c702430c19df8bdb764818d61a62
SHA512

b72f73466bd31299a04710f58a7cbd9e01cbbb64297ad2ded86f248814898389de5e97aa59fe5c0936a1c41895e64e1a458576bb31f4de08e2fa5ce70bb84c88
SSDEEP

24576:xorhrGbk0PpCcnCKZthzuSWTAEn/RgaT2NX8nYRZR21omrEH7o:acbwKtjWTADaOKYRZQZ

Score

10^/10

floxif backdoor persistence privilege_escalation 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/0x00090000000235e3-1.dat	floxif

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00090000000235e3-1.dat	acprotect

Loads dropped DLL 3 IoCs

pid	Process
4052	rundll32.exe
3944	WerFault.exe
4528	WerFault.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00090000000235e3-1.dat	upx
behavioral2/memory/4052-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4052-10-0x0000000010000000-0x0000000010030000-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
4528	4052	WerFault.exe	88

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4052	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4136 wrote to memory of 4052	4136	rundll32.exe	88
PID 4136 wrote to memory of 4052	4136	rundll32.exe	88
PID 4136 wrote to memory of 4052	4136	rundll32.exe	88

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\063fdb320a5e8b9fb9f237f1000eabd15dc8c702430c19df8bdb764818d61a62.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4136
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\063fdb320a5e8b9fb9f237f1000eabd15dc8c702430c19df8bdb764818d61a62.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  PID:4052
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 744
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:4528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4052 -ip 4052
1⤵
- Loads dropped DLL
PID:3944

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4164,i,270339169963605285,17552719617811964021,262144 --variations-seed-version --mojo-platform-channel-handle=4388 /prefetch:8
1⤵
PID:748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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/4052-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4052-10-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4052-8-0x0000000010220000-0x000000001036A000-memory.dmp

Filesize
1.3MB

Download