floxif | f3afd712e1e7ba1e031f96d6936e5ba7839dbcdb56fa03d8b008df08dd0fba81

Analysis

max time kernel
75s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18-12-2024 04:18

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General

Target

f3afd712e1e7ba1e031f96d6936e5ba7839dbcdb56fa03d8b008df08dd0fba81N.dll
Size

195KB
MD5

a4ddd0c04fd661c89ad71eb98ee2f230
SHA1

5c73852ce3e84f618bfae1be1539d0dd33405ade
SHA256

f3afd712e1e7ba1e031f96d6936e5ba7839dbcdb56fa03d8b008df08dd0fba81
SHA512

88c9119a19d6a1f0e384aaf0b9b5c74488587328a254328b8db4e7508e8593105d457b54d85ec7e5c13e9e4cefda631e1605609b6bb936c4f3764f21933fff04
SSDEEP

3072:ZFxwKlzbUy0Twial2Mvw6dtHfOIw2lQBV+UdE+rECWp7hKXLkv:ZFxwK5As2s/6BV+UdvrEFp7hKXLkv

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/0x000e00000001537c-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000e00000001537c-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1764	regsvr32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000e00000001537c-1.dat	upx
behavioral1/memory/1764-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/1764-6-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	regsvr32.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	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1764	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 1764	2072	regsvr32.exe	31
PID 2072 wrote to memory of 1764	2072	regsvr32.exe	31
PID 2072 wrote to memory of 1764	2072	regsvr32.exe	31
PID 2072 wrote to memory of 1764	2072	regsvr32.exe	31
PID 2072 wrote to memory of 1764	2072	regsvr32.exe	31
PID 2072 wrote to memory of 1764	2072	regsvr32.exe	31
PID 2072 wrote to memory of 1764	2072	regsvr32.exe	31

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f3afd712e1e7ba1e031f96d6936e5ba7839dbcdb56fa03d8b008df08dd0fba81N.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2072
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\f3afd712e1e7ba1e031f96d6936e5ba7839dbcdb56fa03d8b008df08dd0fba81N.dll
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1764

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/1764-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1764-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download