purplefox | 260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb

General

Target

260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe
Size

2.9MB
MD5

2defbea0aa2bf978d7e9cc6738dc3bf4
SHA1

a3efd8a8c544e7dc79c01fd837469470b054bd42
SHA256

260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb
SHA512

0ba23b2a637738a3dc25ce2695245d347ea1edc93f455cef6edd7406717433c424c9e6976289ad7f620c1a347fbc24839509bc03890530cf19330800df682dd4
SSDEEP

49152:UWSu7wVMlj1Qbfa0sS2NFPnkrg6rvcR7cOevwgeW2ZU6RnvE3+AKlkx:UaQM3Qb16krBrvcRoOqHS5vcpDx

Score

10^/10

purplefox discovery persistence rootkit trojan upx

Malware Config

Signatures

Detect PurpleFox Rootkit 4 IoCs

Detect PurpleFox Rootkit.

rootkit

Processes:

resource	yara_rule
behavioral2/memory/3080-9-0x0000000000290000-0x0000000000EDA000-memory.dmp	purplefox_rootkit
behavioral2/memory/4600-8-0x0000000000430000-0x000000000107A000-memory.dmp	purplefox_rootkit
behavioral2/memory/4160-13-0x0000000000290000-0x0000000000EDA000-memory.dmp	purplefox_rootkit
behavioral2/memory/4160-19-0x0000000000290000-0x0000000000EDA000-memory.dmp	purplefox_rootkit

PurpleFox
PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.
rootkit trojan purplefox
Purplefox family
purplefox

Drops file in Drivers directory 1 IoCs

Processes:

sainbox.exe

description	ioc	Process
File created	C:\Windows\system32\drivers\QAssist.sys	sainbox.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

sainbox.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\QAssist\ImagePath = "system32\\DRIVERS\\QAssist.sys"	sainbox.exe

Executes dropped EXE 2 IoCs

Processes:

sainbox.exesainbox.exe

pid	Process
3080	sainbox.exe
4160	sainbox.exe

Drops file in System32 directory 2 IoCs

Processes:

260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe

description	ioc	Process
File created	C:\Windows\SysWOW64\sainbox.exe	260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe
File opened for modification	C:\Windows\SysWOW64\sainbox.exe	260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe

UPX packed file 8 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4600-0-0x0000000000430000-0x000000000107A000-memory.dmp	upx
behavioral2/files/0x000c000000023b35-3.dat	upx
behavioral2/memory/3080-5-0x0000000000290000-0x0000000000EDA000-memory.dmp	upx
behavioral2/memory/3080-9-0x0000000000290000-0x0000000000EDA000-memory.dmp	upx
behavioral2/memory/4600-8-0x0000000000430000-0x000000000107A000-memory.dmp	upx
behavioral2/memory/4160-11-0x0000000000290000-0x0000000000EDA000-memory.dmp	upx
behavioral2/memory/4160-13-0x0000000000290000-0x0000000000EDA000-memory.dmp	upx
behavioral2/memory/4160-19-0x0000000000290000-0x0000000000EDA000-memory.dmp	upx

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

Processes:

260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exesainbox.exesainbox.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sainbox.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sainbox.exe

Modifies data under HKEY_USERS 5 IoCs

Processes:

sainbox.exe

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	sainbox.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	sainbox.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	sainbox.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	sainbox.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	sainbox.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

Processes:

sainbox.exe

pid	Process
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe
4160	sainbox.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

sainbox.exe

pid	Process
4160	sainbox.exe

Suspicious behavior: LoadsDriver 1 IoCs

Processes:

sainbox.exe

pid	Process
4160	sainbox.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exesainbox.exe

description	pid	Process
Token: SeSecurityPrivilege	4600	260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe
Token: SeLoadDriverPrivilege	4160	sainbox.exe
Token: 33	4160	sainbox.exe
Token: SeIncBasePriorityPrivilege	4160	sainbox.exe
Token: 33	4160	sainbox.exe
Token: SeIncBasePriorityPrivilege	4160	sainbox.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

sainbox.exe

description	pid	Process	procid_target
PID 3080 wrote to memory of 4160	3080	sainbox.exe	85
PID 3080 wrote to memory of 4160	3080	sainbox.exe	85
PID 3080 wrote to memory of 4160	3080	sainbox.exe	85

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

T1112

Processes:

260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\SoftwareSASGeneration = "3"	260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe

C:\Users\Admin\AppData\Local\Temp\260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe
"C:\Users\Admin\AppData\Local\Temp\260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- System policy modification
PID:4600

C:\Windows\SysWOW64\sainbox.exe
C:\Windows\SysWOW64\sainbox.exe -auto
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3080
- C:\Windows\SysWOW64\sainbox.exe
  C:\Windows\SysWOW64\sainbox.exe -acsi
  2⤵
  - Drops file in Drivers directory
  - Sets service image path in registry
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:4160

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

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

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:\Windows\SysWOW64\sainbox.exe

Filesize
2.9MB

MD5
2defbea0aa2bf978d7e9cc6738dc3bf4

SHA1
a3efd8a8c544e7dc79c01fd837469470b054bd42

SHA256
260d848cbce0f975f2842e5ac2a678b087e1f8418feca73b1e1f603765a1a3fb

SHA512
0ba23b2a637738a3dc25ce2695245d347ea1edc93f455cef6edd7406717433c424c9e6976289ad7f620c1a347fbc24839509bc03890530cf19330800df682dd4

Download Submit
memory/3080-5-0x0000000000290000-0x0000000000EDA000-memory.dmp

Filesize
12.3MB

Download
memory/3080-9-0x0000000000290000-0x0000000000EDA000-memory.dmp

Filesize
12.3MB

Download
memory/4160-11-0x0000000000290000-0x0000000000EDA000-memory.dmp

Filesize
12.3MB

Download
memory/4160-13-0x0000000000290000-0x0000000000EDA000-memory.dmp

Filesize
12.3MB

Download
memory/4160-19-0x0000000000290000-0x0000000000EDA000-memory.dmp

Filesize
12.3MB

Download
memory/4600-0-0x0000000000430000-0x000000000107A000-memory.dmp

Filesize
12.3MB

Download
memory/4600-8-0x0000000000430000-0x000000000107A000-memory.dmp

Filesize
12.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads