purplefox | 0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580

Analysis

max time kernel
150s
max time network
123s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
08-01-2025 01:54

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General

Target

0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
Size

3.0MB
MD5

7d727d7f3aa689290a1aff5f7044a0e6
SHA1

1feab9c662fb65ccd7a5e53759e46805ecf0470b
SHA256

0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580
SHA512

bbf92f6d892a58a6087efc4e5f77ff08654fc7a48ea61982cc52c7d333fecc1b2a325614cd01595e7c23d383609b934fc1fd731242a90e3b4e42e61e50ea33fd
SSDEEP

49152:t0SsdKAeAMsNfnrlG4i77uB48ROuiQzVnYixYLR686UYVEQYHm+ewrYG:v/6NfnrlG4i7aXzxmLjH99V

Score

10^/10

purplefox discovery persistence rootkit trojan upx

Malware Config

Signatures

Detect PurpleFox Rootkit 3 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral1/memory/2576-65-0x0000000010000000-0x0000000010231000-memory.dmp	purplefox_rootkit
behavioral1/memory/1660-80-0x0000000010000000-0x0000000010231000-memory.dmp	purplefox_rootkit
behavioral1/memory/1300-92-0x0000000010000000-0x0000000010231000-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

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

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

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

Executes dropped EXE 3 IoCs

pid	Process
2576	smss.exe
1660	smss.exe
1300	smss.exe

Loads dropped DLL 11 IoCs

pid	Process
2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
2576	smss.exe
2576	smss.exe
2576	smss.exe
1660	smss.exe
1660	smss.exe
1660	smss.exe
1660	smss.exe
1300	smss.exe
1300	smss.exe
1300	smss.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\smss.exe	smss.exe
File opened for modification	C:\Windows\SysWOW64\smss.exe	smss.exe

UPX packed file 26 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2748-1-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-0-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-51-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-50-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-49-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-47-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-45-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-43-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-40-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-36-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-34-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-31-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-28-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-26-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-24-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-22-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-19-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-15-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-13-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-11-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-9-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-7-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-5-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-3-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-2-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral1/memory/2748-38-0x0000000010000000-0x000000001003E000-memory.dmp	upx

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\smss.exe	smss.exe
File created	C:\Windows\Fonts\smss.zip	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
File created	C:\Windows\Fonts\smss.exe	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
File opened for modification	C:\Windows\Fonts\smss.exe	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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	smss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smss.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
584	cmd.exe
1412	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1412	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1300	smss.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
1300	smss.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2576	smss.exe
Token: SeLoadDriverPrivilege	1300	smss.exe
Token: 33	1300	smss.exe
Token: SeIncBasePriorityPrivilege	1300	smss.exe
Token: 33	1300	smss.exe
Token: SeIncBasePriorityPrivilege	1300	smss.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2748 wrote to memory of 2576	2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe	31
PID 2748 wrote to memory of 2576	2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe	31
PID 2748 wrote to memory of 2576	2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe	31
PID 2748 wrote to memory of 2576	2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe	31
PID 2748 wrote to memory of 2576	2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe	31
PID 2748 wrote to memory of 2576	2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe	31
PID 2748 wrote to memory of 2576	2748	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe	31
PID 1660 wrote to memory of 1300	1660	smss.exe	33
PID 1660 wrote to memory of 1300	1660	smss.exe	33
PID 1660 wrote to memory of 1300	1660	smss.exe	33
PID 1660 wrote to memory of 1300	1660	smss.exe	33
PID 1660 wrote to memory of 1300	1660	smss.exe	33
PID 1660 wrote to memory of 1300	1660	smss.exe	33
PID 1660 wrote to memory of 1300	1660	smss.exe	33
PID 2576 wrote to memory of 584	2576	smss.exe	34
PID 2576 wrote to memory of 584	2576	smss.exe	34
PID 2576 wrote to memory of 584	2576	smss.exe	34
PID 2576 wrote to memory of 584	2576	smss.exe	34
PID 2576 wrote to memory of 584	2576	smss.exe	34
PID 2576 wrote to memory of 584	2576	smss.exe	34
PID 2576 wrote to memory of 584	2576	smss.exe	34
PID 584 wrote to memory of 1412	584	cmd.exe	36
PID 584 wrote to memory of 1412	584	cmd.exe	36
PID 584 wrote to memory of 1412	584	cmd.exe	36
PID 584 wrote to memory of 1412	584	cmd.exe	36
PID 584 wrote to memory of 1412	584	cmd.exe	36
PID 584 wrote to memory of 1412	584	cmd.exe	36
PID 584 wrote to memory of 1412	584	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
"C:\Users\Admin\AppData\Local\Temp\0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2748
- C:\Windows\Fonts\smss.exe
  C:\Windows\Fonts\\smss.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in System32 directory
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2576
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ping -n 2 127.0.0.1 > nul && del C:\Windows\Fonts\smss.exe > nul
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:584
  - - C:\Windows\SysWOW64\PING.EXE
      ping -n 2 127.0.0.1
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1412

C:\Windows\SysWOW64\smss.exe
C:\Windows\SysWOW64\smss.exe -auto
1⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1660
- C:\Windows\SysWOW64\smss.exe
  C:\Windows\SysWOW64\smss.exe -acsi
  2⤵
  - Drops file in Drivers directory
  - Sets service image path in registry
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:1300

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Windows\Fonts\smss.exe

Filesize
2.5MB

MD5
b5254c431920ccb4e80db0391b287249

SHA1
ee1517b0f8940cce9b1a2aa95bce3f5df6ea8d9d

SHA256
ad1c6b58e8f4f14d53f2128f20b4c66280a4835d6172b9a0c6eae10db3d40c6e

SHA512
fff711a3239123e7099f6b151167312b64ce82a846888569b5f8bf8b8cab835546a33220118338f0ed015980f4fd8547302c778ae1e33ca09e88d74f7ee332ad

Download Submit
memory/1300-92-0x0000000010000000-0x0000000010231000-memory.dmp

Filesize
2.2MB

Download
memory/1660-80-0x0000000010000000-0x0000000010231000-memory.dmp

Filesize
2.2MB

Download
memory/2576-65-0x0000000010000000-0x0000000010231000-memory.dmp

Filesize
2.2MB

Download
memory/2748-24-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-15-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-45-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-43-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-40-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-36-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-34-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-31-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-28-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-26-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-1-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-22-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-19-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-47-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-13-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-11-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-9-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-7-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-5-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-3-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-2-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-38-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-49-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-50-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-51-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/2748-0-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download