floxif | 5da3e0fc6992caaa5b86ce3f0aebf1777e0864ce21883e4607907ac96465b14d

General

Target

Original.exe
Size

233KB
MD5

008efd16250ac6f61a05be151092ef2b
SHA1

dade2a89ae3f5cd19ac22b5a2e980a88d9322fcf
SHA256

5da3e0fc6992caaa5b86ce3f0aebf1777e0864ce21883e4607907ac96465b14d
SHA512

1eccf3e082e4a3f2d4cc3cbcbbef22fc67a5a0a2cddd150cd457d36cb0e1d583adb247f26b98f0d45a68db3d85f13504a69d3a73546297e91c11a038cfb9ef17
SSDEEP

6144:wxwfFcVuW5HYWLV/HUBV+UdvrEFp7hKtM:4wf6VuW5H/5/0BjvrEH7l

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/0x000b000000023cb6-1.dat	floxif

Downloads MZ/PE file

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000b000000023cb6-1.dat	acprotect

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Original.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	pvpxFDoALCAykMp.exe

Executes dropped EXE 1 IoCs

pid	Process
4908	pvpxFDoALCAykMp.exe

Loads dropped DLL 1 IoCs

pid	Process
2884	Original.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:	Original.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000b000000023cb6-1.dat	upx
behavioral2/memory/2884-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/2884-39-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

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

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\System\a1.mentah	Original.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 3 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	Original.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pvpxFDoALCAykMp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NOTEPAD.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	pvpxFDoALCAykMp.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1904	NOTEPAD.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2884	Original.exe
2884	Original.exe
2884	Original.exe
2884	Original.exe
4908	pvpxFDoALCAykMp.exe
4908	pvpxFDoALCAykMp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2884	Original.exe
Token: SeDebugPrivilege	2884	Original.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
2884	Original.exe
2884	Original.exe
2884	Original.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
2884	Original.exe
2884	Original.exe
2884	Original.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2884 wrote to memory of 4908	2884	Original.exe	93
PID 2884 wrote to memory of 4908	2884	Original.exe	93
PID 2884 wrote to memory of 4908	2884	Original.exe	93
PID 4908 wrote to memory of 1904	4908	pvpxFDoALCAykMp.exe	101
PID 4908 wrote to memory of 1904	4908	pvpxFDoALCAykMp.exe	101
PID 4908 wrote to memory of 1904	4908	pvpxFDoALCAykMp.exe	101

C:\Users\Admin\AppData\Local\Temp\Original.exe
"C:\Users\Admin\AppData\Local\Temp\Original.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Enumerates connected drives
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2884
- C:\Users\Admin\AppData\Local\Temp\pvpxFDoALCAykMp.exe
  "C:\Users\Admin\AppData\Local\Temp\pvpxFDoALCAykMp.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4908
- - C:\Windows\SysWOW64\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\HWID.txt
    3⤵
    - System Location Discovery: System Language Discovery
    - Opens file in notepad (likely ransom note)
    PID:1904

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

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\HWID.txt

Filesize
271B

MD5
b7ea41bbd62720b32663dd3bcd60af0b

SHA1
99b1337a9cbb91bdde95b7bda392483986f33ae7

SHA256
47301da6b71f73cec8c81e3a2c19a98e94e5db78c5a4e256a7fecd672e1a868a

SHA512
8f551c5bbdc58c6133757babddc66c3700c4a8a7da6be9bb35213a258424d205846fe713b0d58a071d7a14b015c21abc2b3b90a586a2a7d9fc70683445f5d952

Download Submit
C:\Program Files\Common Files\System\symsrv.dll

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
C:\Windows\System\a1.mentah

Filesize
191KB

MD5
81c43a6d715840acd8d61327deecdd47

SHA1
213cd995f6c830647bfe683d5afb120cdc44706c

SHA256
ca3e2855001a3859752900c413f699b89a97c1f0f9492c9e7e874a62bce4513f

SHA512
55a8c765d5c5f0b3fee5ad5f756576b88c6869e026f49931b82d2ca0ffe5d257794ecc0c6bc518f973be229257201f6197c3dca773815a2819303736690b9fce

Download Submit
memory/2884-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2884-6-0x00000000006A1000-0x00000000006A2000-memory.dmp

Filesize
4KB

Download
memory/2884-37-0x00000000006A0000-0x00000000006CD000-memory.dmp

Filesize
180KB

Download
memory/2884-39-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads