floxif | b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532

General

Target

b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe
Size

2.9MB
MD5

adb0e4c5dc14a6930685b82edd2b7b70
SHA1

2e1a523fbddd9b2f402a9497f450ac057f09a8bc
SHA256

b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532
SHA512

3c134c8c8a445a4d6b4ea5c033d027364f2f7eea00da1efb9daa304da7a9e0713bf8c45b392c489f1a1d2bee6345e571eb900016cd7d9695751f202ec79200f0
SSDEEP

49152:HtQEKKEA2biE2JCa01conHjIfDjo6VuqTBgknBDoaiEqvn893NbbLM+WA+qvP:HtxEA2b2JTsjMDU6VuJkdoaTqk91aqH

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/0x000c000000023b14-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b14-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2220	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.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:	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/2220-29-0x0000000000400000-0x00000000004C4000-memory.dmp	autoit_exe
behavioral2/memory/2220-33-0x0000000000400000-0x00000000004C4000-memory.dmp	autoit_exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b14-1.dat	upx
behavioral2/memory/2220-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/2220-32-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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 value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Nls\Language\InstallLanguage	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Nls\Language	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2220	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe
2220	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2220	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 4372	2220	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe	84
PID 2220 wrote to memory of 4372	2220	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe	84
PID 2220 wrote to memory of 4372	2220	b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe	84

C:\Users\Admin\AppData\Local\Temp\b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe
"C:\Users\Admin\AppData\Local\Temp\b21575f86639bff8a30080b9706ea33661f0bf415bbde3afa3f8b27bde23d532N.exe"
1⤵
- 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
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c rd /s /q "F:\~WanDrv6.Temp.o5Zrg"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

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
memory/2220-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2220-6-0x000000000042B000-0x000000000042E000-memory.dmp

Filesize
12KB

Download
memory/2220-29-0x0000000000400000-0x00000000004C4000-memory.dmp

Filesize
784KB

Download
memory/2220-32-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2220-33-0x0000000000400000-0x00000000004C4000-memory.dmp

Filesize
784KB

Download

Analysis

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