floxif | 5e25bc1819573769183a0a16c5f5c92e66ce927dcd87386f378a0db530f6fe0b

General

Target

JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
Size

127KB
MD5

51190fd8f396a08400f23e794aebc62d
SHA1

bb9d60b6ffb5fd150ecd875d06aea77de775f384
SHA256

5e25bc1819573769183a0a16c5f5c92e66ce927dcd87386f378a0db530f6fe0b
SHA512

c22b4a99e77eba24d3629437c6f3a1a8d8c6871a3d375cbe8c9f1edf9d34e0e700315654c6ba93a1698c734829462a76a98394e3424bb1108ed005cf6745e9dd
SSDEEP

3072:zIQggkXHMoyo02lQBV+UdE+rECWp7hKO6:zIGk8oyoSBV+UdvrEFp7hKO6

Score

10^/10

floxif backdoor discovery evasion persistence privilege_escalation 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

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	winsvcs.exe

Windows security bypass 2 TTPs 6 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1"	winsvcs.exe

Detects Floxif payload 1 IoCs

backdoor

resource	yara_rule
behavioral2/files/0x000c000000023b32-2.dat	floxif

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	winsvcs.exe

Disables Task Manager via registry modification
evasion
Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b32-2.dat	acprotect

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\StartUp\winupdsvcs.exe	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\StartUp\winupdsvcs.exe	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\StartUp\winupdsvcs.exe	winsvcs.exe

Executes dropped EXE 1 IoCs

pid	Process
1056	winsvcs.exe

Loads dropped DLL 4 IoCs

pid	Process
1616	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
1056	winsvcs.exe
5040	WerFault.exe
4808	WerFault.exe

Windows security modification 2 TTPs 7 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AutoUpdateDisableNotify = "1"	winsvcs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	winsvcs.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Microsoft Windows Services = "C:\\Windows\\780873646070850\\winsvcs.exe"	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft Windows Services = "C:\\Windows\\780873646070850\\winsvcs.exe"	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.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:	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe

UPX packed file 14 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1616-0-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral2/files/0x000c000000023b32-2.dat	upx
behavioral2/memory/1616-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1616-16-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral2/memory/1616-18-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1616-20-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1616-29-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x0009000000023bbf-38.dat	upx
behavioral2/memory/1056-50-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral2/memory/1616-59-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1056-60-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral2/memory/1056-63-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1056-70-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1056-76-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\780873646070850	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
File opened for modification	C:\Windows\780873646070850\winsvcs.exe	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
File created	C:\Windows\780873646070850\winsvcs.exe	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4808	1616	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 2 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	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winsvcs.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1616	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
1616	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
1056	winsvcs.exe
1056	winsvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1616	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
Token: SeDebugPrivilege	1056	winsvcs.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1616 wrote to memory of 1056	1616	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe	93
PID 1616 wrote to memory of 1056	1616	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe	93
PID 1616 wrote to memory of 1056	1616	JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe	93

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_51190fd8f396a08400f23e794aebc62d.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Adds Run key to start application
- 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 WriteProcessMemory
PID:1616
- C:\Windows\780873646070850\winsvcs.exe
  C:\Windows\780873646070850\winsvcs.exe
  2⤵
  - Modifies Windows Defender Real-time Protection settings
  - Windows security bypass
  - Disables RegEdit via registry modification
  - Drops startup file
  - Executes dropped EXE
  - Loads dropped DLL
  - Windows security modification
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1616 -s 460
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:4808

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1616 -ip 1616
1⤵
- Loads dropped DLL
PID:5040

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Defense Evasion

Impair Defenses

3

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

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:\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
C:\Users\Admin\AppData\Local\Temp\A1D26E2\CA551260650.tmp

Filesize
51KB

MD5
88e51db0cef4ff83abffa4a3691a6c8b

SHA1
b5046fe9eeacad64cb6b908255e0eafed68f5d27

SHA256
7e9a4439cd642e21bd82af4dc18dcc624c93c66262705ae4a73f4f098df259de

SHA512
6c1e82acb79bc2a07eda74f181d45282cf6dd374d9e055da5cca198105f14c74322b0bf4114e1b7c38653ece614c4611ce65e8da76105bdee0479b8a2f063c1a

Download Submit
memory/1056-76-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1056-69-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1056-70-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1056-68-0x00000000764B0000-0x0000000076513000-memory.dmp

Filesize
396KB

Download
memory/1056-66-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1056-65-0x00000000764B0000-0x0000000076513000-memory.dmp

Filesize
396KB

Download
memory/1056-63-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1056-60-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1056-50-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1616-30-0x00000000764B0000-0x0000000076513000-memory.dmp

Filesize
396KB

Download
memory/1616-20-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1616-0-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1616-27-0x00000000764B0000-0x0000000076513000-memory.dmp

Filesize
396KB

Download
memory/1616-24-0x00000000764B0000-0x0000000076513000-memory.dmp

Filesize
396KB

Download
memory/1616-59-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1616-58-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1616-29-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1616-21-0x00000000764C5000-0x00000000764C6000-memory.dmp

Filesize
4KB

Download
memory/1616-18-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1616-16-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1616-17-0x00000000764B0000-0x0000000076513000-memory.dmp

Filesize
396KB

Download
memory/1616-13-0x00000000764B0000-0x0000000076513000-memory.dmp

Filesize
396KB

Download
memory/1616-12-0x00000000764C5000-0x00000000764C6000-memory.dmp

Filesize
4KB

Download
memory/1616-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads