floxif | 502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc

General

Target

502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe
Size

9.8MB
MD5

18034a901eaf8fb3717e23a57ee81d8c
SHA1

a3673ad2b501a88a198a79a89e87e538a65905aa
SHA256

502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc
SHA512

dac4d7ba866cd1f152d50e915ef60c66b69d1d241effd9f6063087ebe9e301f1f08e5f512d638b36ffd7a26ec42d49d86553cb9141d36b45b9a2643110758552
SSDEEP

196608:qwOYT73A/PCDoWzN87yZqLcbUm4CzknrnbELh19M8pjx6gO0EMT2:Fl7SqDhqyZqLwqqk3E39npjZO0Em2

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/0x000b000000012263-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000b000000012263-1.dat	acprotect

Executes dropped EXE 3 IoCs

pid	Process
2784	gpuz_installer.exe
2920	gpuz_installer.tmp
2956	GPU-Z.exe

Loads dropped DLL 12 IoCs

pid	Process
2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe
2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe
2784	gpuz_installer.exe
2920	gpuz_installer.tmp
2920	gpuz_installer.tmp
2920	gpuz_installer.tmp
2920	gpuz_installer.tmp
2920	gpuz_installer.tmp
2920	gpuz_installer.tmp
2920	gpuz_installer.tmp
2920	gpuz_installer.tmp
2920	gpuz_installer.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

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:	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe

UPX packed file 13 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000b000000012263-1.dat	upx
behavioral1/memory/2540-4-0x0000000000160000-0x0000000002E48000-memory.dmp	upx
behavioral1/memory/2540-6-0x0000000000160000-0x0000000002E48000-memory.dmp	upx
behavioral1/memory/2540-7-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2540-12-0x0000000000160000-0x0000000002E48000-memory.dmp	upx
behavioral1/files/0x00150000000170f8-29.dat	upx
behavioral1/memory/2540-32-0x0000000000160000-0x0000000002E48000-memory.dmp	upx
behavioral1/memory/2540-35-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2540-37-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2540-43-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2540-66-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2540-79-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2540-77-0x0000000000160000-0x0000000002E48000-memory.dmp	upx

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File created	\??\c:\program files\common files\system\symsrv.dll.000	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe
File opened for modification	C:\Program Files (x86)\GPU-Z\GPU-Z.exe	gpuz_installer.tmp
File created	C:\Program Files (x86)\GPU-Z\unins000.dat	gpuz_installer.tmp
File created	C:\Program Files (x86)\GPU-Z\is-HTKBI.tmp	gpuz_installer.tmp
File created	C:\Program Files (x86)\GPU-Z\is-537ME.tmp	gpuz_installer.tmp
File opened for modification	C:\Program Files (x86)\GPU-Z\unins000.dat	gpuz_installer.tmp
File created	C:\Program Files\Common Files\System\symsrv.dll	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.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	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gpuz_installer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gpuz_installer.tmp

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe
2920	gpuz_installer.tmp
2920	gpuz_installer.tmp

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe
Token: SeDebugPrivilege	2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2920	gpuz_installer.tmp

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2540 wrote to memory of 2784	2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe	30
PID 2540 wrote to memory of 2784	2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe	30
PID 2540 wrote to memory of 2784	2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe	30
PID 2540 wrote to memory of 2784	2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe	30
PID 2540 wrote to memory of 2784	2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe	30
PID 2540 wrote to memory of 2784	2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe	30
PID 2540 wrote to memory of 2784	2540	502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe	30
PID 2784 wrote to memory of 2920	2784	gpuz_installer.exe	31
PID 2784 wrote to memory of 2920	2784	gpuz_installer.exe	31
PID 2784 wrote to memory of 2920	2784	gpuz_installer.exe	31
PID 2784 wrote to memory of 2920	2784	gpuz_installer.exe	31
PID 2784 wrote to memory of 2920	2784	gpuz_installer.exe	31
PID 2784 wrote to memory of 2920	2784	gpuz_installer.exe	31
PID 2784 wrote to memory of 2920	2784	gpuz_installer.exe	31
PID 2920 wrote to memory of 2956	2920	gpuz_installer.tmp	33
PID 2920 wrote to memory of 2956	2920	gpuz_installer.tmp	33
PID 2920 wrote to memory of 2956	2920	gpuz_installer.tmp	33
PID 2920 wrote to memory of 2956	2920	gpuz_installer.tmp	33

C:\Users\Admin\AppData\Local\Temp\502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.exe
"C:\Users\Admin\AppData\Local\Temp\502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc.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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Users\Admin\AppData\Local\Temp\gpuz_installer.exe
  "C:\Users\Admin\AppData\Local\Temp\\gpuz_installer.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2784
- - C:\Users\Admin\AppData\Local\Temp\is-J3A1T.tmp\gpuz_installer.tmp
    "C:\Users\Admin\AppData\Local\Temp\is-J3A1T.tmp\gpuz_installer.tmp" /SL5="$401CA,832512,832512,C:\Users\Admin\AppData\Local\Temp\gpuz_installer.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of WriteProcessMemory
    PID:2920
  - - C:\Program Files (x86)\GPU-Z\GPU-Z.exe
      "C:\Program Files (x86)\GPU-Z\GPU-Z.exe"
      4⤵
      Executes dropped EXE
      PID:2956

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\GPU-Z.exe

Filesize
9.8MB

MD5
18034a901eaf8fb3717e23a57ee81d8c

SHA1
a3673ad2b501a88a198a79a89e87e538a65905aa

SHA256
502d374b2967fe0ac0057e620f5b543671df21d1c7d414d8a4bfdc3922a392cc

SHA512
dac4d7ba866cd1f152d50e915ef60c66b69d1d241effd9f6063087ebe9e301f1f08e5f512d638b36ffd7a26ec42d49d86553cb9141d36b45b9a2643110758552

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
\Users\Admin\AppData\Local\Temp\gpuz_installer.exe

Filesize
1.6MB

MD5
adb15bf5d30c7139d1a4c4f161ad80d0

SHA1
57b97530e668d75e1b0451822ae36897f889dc65

SHA256
ffe80b378485e6ba258911f5dedf292640ee378221f62eec9d60e84914bd0798

SHA512
014f4318c40009127671dac7d5826ca81bab813a3cdf4e998ea96861aa6c57e3366e47c8961b75834d877bc4cdeff5476d85993b67d4e00e99d511045f0c7638

Download Submit
\Users\Admin\AppData\Local\Temp\is-J3A1T.tmp\gpuz_installer.tmp

Filesize
3.1MB

MD5
4c9111b5058cb0a71da1c566e6b15de5

SHA1
cdf0963572c509ecc8651a7081dd5aca44886007

SHA256
ff02cd92b07585423ef7bdd0a873374922767fe21f93fcebc24181a5ee2111fa

SHA512
3dc28a3f0a1404b67dd5374e2c5e13f1c1b0250c1e07666dbbd4bf31b400ee549c3beb7b872dd7d10dd54ce401b01a362a59bca54b2c7209cbedd97caa7cea46

Download Submit
memory/2540-12-0x0000000000160000-0x0000000002E48000-memory.dmp

Filesize
44.9MB

Download
memory/2540-37-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2540-7-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2540-79-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2540-43-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2540-6-0x0000000000160000-0x0000000002E48000-memory.dmp

Filesize
44.9MB

Download
memory/2540-5-0x0000000002E31000-0x0000000002E32000-memory.dmp

Filesize
4KB

Download
memory/2540-32-0x0000000000160000-0x0000000002E48000-memory.dmp

Filesize
44.9MB

Download
memory/2540-4-0x0000000000160000-0x0000000002E48000-memory.dmp

Filesize
44.9MB

Download
memory/2540-35-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2540-66-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2540-77-0x0000000000160000-0x0000000002E48000-memory.dmp

Filesize
44.9MB

Download
memory/2784-38-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/2784-22-0x0000000000401000-0x00000000004B7000-memory.dmp

Filesize
728KB

Download
memory/2784-19-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/2784-76-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/2920-33-0x0000000003600000-0x00000000062E8000-memory.dmp

Filesize
44.9MB

Download
memory/2920-75-0x0000000000400000-0x000000000071C000-memory.dmp

Filesize
3.1MB

Download
memory/2920-64-0x0000000000400000-0x000000000071C000-memory.dmp

Filesize
3.1MB

Download
memory/2920-44-0x0000000003600000-0x00000000062E8000-memory.dmp

Filesize
44.9MB

Download
memory/2920-39-0x0000000000400000-0x000000000071C000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing