floxif | 22c434e5629f0efd1dc735d0ffa672254413d06e30425a8684582faa773d03c6

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28/01/2025, 09:06

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General

Target

JaffaCakes118_4925287f17af3365afdff81f4c4293ed.dll
Size

334KB
MD5

4925287f17af3365afdff81f4c4293ed
SHA1

2bd237e2ad01d9592ef0186d635b0ba075a36089
SHA256

22c434e5629f0efd1dc735d0ffa672254413d06e30425a8684582faa773d03c6
SHA512

6dbc95bd5ce454670f96ffe6e8abdac496eef250d72d1230c79aba3c8796246e2f734f3c38e0da6b54ad5dcedb714fae56a139ff7d7feadb0b6c0b65dbfa808e
SSDEEP

6144:SDeto6DuwGaWlT25Zatw6eMUkJ3DopwfwTLGiyKy8TmqnTgJXZr0pnyEqma5a:0XllT2IfJ3DaDnGiyKjTmKvpimaY

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/0x0007000000012118-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0007000000012118-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2400	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0007000000012118-1.dat	upx
behavioral1/memory/2400-3-0x00000000001F0000-0x0000000000220000-memory.dmp	upx
behavioral1/memory/2400-7-0x00000000001F0000-0x0000000000220000-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

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	2400	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2960 wrote to memory of 2400	2960	rundll32.exe	30
PID 2960 wrote to memory of 2400	2960	rundll32.exe	30
PID 2960 wrote to memory of 2400	2960	rundll32.exe	30
PID 2960 wrote to memory of 2400	2960	rundll32.exe	30
PID 2960 wrote to memory of 2400	2960	rundll32.exe	30
PID 2960 wrote to memory of 2400	2960	rundll32.exe	30
PID 2960 wrote to memory of 2400	2960	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4925287f17af3365afdff81f4c4293ed.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2960
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4925287f17af3365afdff81f4c4293ed.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2400

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

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

Filesize
72KB

MD5
3e779be94bd11e41dba0bb6ec8cf8a05

SHA1
2a3d6f292e61acae54ffbcd59d71332c70c70863

SHA256
16efba9c92b36269b250ce0de28af2007c47f621423adf3ffc9243e30448bc88

SHA512
20ea4e4eb95191d5a186dbc47d5dc33ed9d1ef303da74f6526aec06b43571a4a3ee99ab8e244c94c623b28a43fbdcf57c240d80662377d6f0261e5558e9c5d65

Download Submit
memory/2400-3-0x00000000001F0000-0x0000000000220000-memory.dmp

Filesize
192KB

Download
memory/2400-7-0x00000000001F0000-0x0000000000220000-memory.dmp

Filesize
192KB

Download