floxif | a5039fe8960279abf3ff71a8bca13ff51657384cad6b84cd189d35ea654d055a

Analysis

max time kernel
98s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
21/08/2024, 04:24

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General

Target
de2e982df7dd95493ebb01d6a131fa40N.dll
Size 205KB
Sample240821-e1kadstcrm
SHA256 a5039fe8960279abf3ff71a8bca13ff51657384cad6b84cd189d35ea654d055a
MD5 de2e982df7dd95493ebb01d6a131fa40
SHA1 2bba66c037fe45b5ce41d077385eaa410ab1e452
SHA512 06ec98cf1b90e1c99cd2f7af9d564c0d2876278c3d3421c8fc9e63540f96eed0f61fe3423bf534d26f32eeddc751c0cfb6c272561a9e761b4894a4708ae86fc6
SSDEEP 3072:T8mpr4FlckQk0km2lHw1QT4PW+3us6S9fL6E2R2lQBV+UdE+rECWp7hKh:SFSkNm2llTvKf0lBV+UdvrEFp7hKh
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

floxif backdoor discovery 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/0x0009000000023463-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023463-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
400	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023463-1.dat	upx
behavioral2/memory/400-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/400-9-0x0000000010000000-0x0000000010030000-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
4120	400	WerFault.exe	84

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	400	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5024 wrote to memory of 400	5024	rundll32.exe	84
PID 5024 wrote to memory of 400	5024	rundll32.exe	84
PID 5024 wrote to memory of 400	5024	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\de2e982df7dd95493ebb01d6a131fa40N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5024
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\de2e982df7dd95493ebb01d6a131fa40N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:400
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 400 -s 680
    3⤵
    - Program crash
    PID:4120

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 400 -ip 400
1⤵
PID:224

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

symsrv.dll

Path C:\Program Files\Common Files\System\symsrv.dll
Size 67KB
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab
SSDEEP 1536:YjV8y93KQpFQmPLRk7G50zy/riF12jvRyo0hQk7ZL:c8y93KQjy7G55riF1cMo03V
MD5 SHA1 SHA512 SSDEEP

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memory/400-4-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/400-5-0x0000000074931000-0x0000000074932000-memory.dmp

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memory/400-7-0x0000000074930000-0x0000000074953000-memory.dmp

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memory/400-9-0x0000000010000000-0x0000000010030000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads