floxif | 62974fd6b419c56526fea59a03c53471a25f5b580215b72fd3451575c4499e73

Analysis

max time kernel
115s
max time network
99s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 11:10

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General

Target

62974fd6b419c56526fea59a03c53471a25f5b580215b72fd3451575c4499e73N.dll
Size

344KB
MD5

4d62b919c1b5b7da34bb0db78ab7dd70
SHA1

c1d11c1ddc5da555059e164ed735fa584a3ee769
SHA256

62974fd6b419c56526fea59a03c53471a25f5b580215b72fd3451575c4499e73
SHA512

ee4dc97f68bab886f805ec9f4eeb30d1b829069560a3e0cb282f921aa54d7850a2b288c67d52a2a2776eb5bf0e887264d52a77909286d23b3eece237ca1f9032
SSDEEP

6144:whdHmPcksknJ22z7hiR05Xl6oshCnlfBV+UdvrEFp7hKOHs:KdmckdFNsGAosQlfBjvrEH7THs

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
behavioral2/files/0x000a000000023c6d-1.dat	floxif

Blocklisted process makes network request 6 IoCs

flow	pid	Process
8	4780	rundll32.exe
18	4780	rundll32.exe
20	4780	rundll32.exe
24	4780	rundll32.exe
27	4780	rundll32.exe
33	4780	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000a000000023c6d-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4780	rundll32.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\e:	rundll32.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000023c6d-1.dat	upx
behavioral2/memory/4780-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4780-11-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4780-17-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4780-23-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4780-35-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	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 behavior: EnumeratesProcesses 6 IoCs

pid	Process
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4780	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4476 wrote to memory of 4780	4476	rundll32.exe	82
PID 4476 wrote to memory of 4780	4476	rundll32.exe	82
PID 4476 wrote to memory of 4780	4476	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\62974fd6b419c56526fea59a03c53471a25f5b580215b72fd3451575c4499e73N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4476
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\62974fd6b419c56526fea59a03c53471a25f5b580215b72fd3451575c4499e73N.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Enumerates connected drives
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

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
C:\Program Files\Common Files\System\symsrv.dll.000

Filesize
175B

MD5
1130c911bf5db4b8f7cf9b6f4b457623

SHA1
48e734c4bc1a8b5399bff4954e54b268bde9d54c

SHA256
eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1

SHA512
94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

Download Submit
memory/4780-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4780-9-0x0000000000580000-0x00000000005C8000-memory.dmp

Filesize
288KB

Download
memory/4780-11-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4780-17-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4780-23-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4780-35-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download