floxif | d7db35819b6c061ff43efb2db758fe8225ec5b28781347aaf663d80f30e9ad63

Analysis

max time kernel
95s
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
06/07/2024, 00:30

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General

Target

2058160d063f9a7e71b05b8208c49200.dll
Size

1.3MB
MD5

2058160d063f9a7e71b05b8208c49200
SHA1

3d0a03ddf4b71cc2097caa18cdec4c444f6d0cec
SHA256

d7db35819b6c061ff43efb2db758fe8225ec5b28781347aaf663d80f30e9ad63
SHA512

cd9f20f58e0847e31a84f51d7ff2999c0cb99ec55bfe91463854f02b9b9c33ccbe6ba47355c015da4682f362a623b7e0370cb0df6d28900333b28e25906accd0
SSDEEP

24576:4CgNcIR8ata3635qrZs3oUQ+OYjslR526siGlVqnWav6e5qRoTrEH7s:Ra8+IG3MdYjsrGidJv6e5Ak

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/0x00060000000232d4-1.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/0x00060000000232d4-1.dat	acprotect

Loads dropped DLL 3 IoCs

pid	Process
3524	rundll32.exe
2480	WerFault.exe
3836	WerFault.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00060000000232d4-1.dat	upx
behavioral2/memory/3524-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3524-10-0x0000000010000000-0x0000000010030000-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
3836	3524	WerFault.exe	82

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3524	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5056 wrote to memory of 3524	5056	rundll32.exe	82
PID 5056 wrote to memory of 3524	5056	rundll32.exe	82
PID 5056 wrote to memory of 3524	5056	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2058160d063f9a7e71b05b8208c49200.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5056
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\2058160d063f9a7e71b05b8208c49200.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  PID:3524
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3524 -s 748
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:3836

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3524 -ip 3524
1⤵
- Loads dropped DLL
PID:2480

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/3524-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3524-10-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3524-8-0x0000000010220000-0x0000000010369000-memory.dmp

Filesize
1.3MB

Download