purplefox | 0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580

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 rootkit trojan upx

Malware Config

Signatures

Detect PurpleFox Rootkit 1 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral2/memory/4720-54-0x0000000010000000-0x0000000010231000-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

Executes dropped EXE 1 IoCs

pid	Process
4720	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 25 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4608-0-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-2-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-31-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-45-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-43-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-41-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-39-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-33-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-29-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-25-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-21-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-17-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-11-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-9-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-5-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-37-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-3-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-27-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-23-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-19-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-15-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-13-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-7-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-1-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/4608-64-0x0000000010000000-0x000000001003E000-memory.dmp	upx

Drops file in Windows directory 4 IoCs

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

System Location Discovery: System Language Discovery 1 TTPs 4 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	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
232	cmd.exe
3988	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3988	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4608	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
4608	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4720	smss.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4608	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
4608	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
4608	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4608 wrote to memory of 4720	4608	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe	82
PID 4608 wrote to memory of 4720	4608	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe	82
PID 4608 wrote to memory of 4720	4608	0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe	82
PID 4720 wrote to memory of 232	4720	smss.exe	83
PID 4720 wrote to memory of 232	4720	smss.exe	83
PID 4720 wrote to memory of 232	4720	smss.exe	83
PID 232 wrote to memory of 3988	232	cmd.exe	85
PID 232 wrote to memory of 3988	232	cmd.exe	85
PID 232 wrote to memory of 3988	232	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe
"C:\Users\Admin\AppData\Local\Temp\0a5c38821be6842b1c3126e0d4a89e95e42e4d35752532afc8d70bf6f6b4a580.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4608
- C:\Windows\Fonts\smss.exe
  C:\Windows\Fonts\\smss.exe
  2⤵
  - Executes dropped EXE
  - 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:4720
- - 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:232
  - - 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:3988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

1

T1018

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\Fonts\smss.exe

Filesize
2.5MB

MD5
b5254c431920ccb4e80db0391b287249

SHA1
ee1517b0f8940cce9b1a2aa95bce3f5df6ea8d9d

SHA256
ad1c6b58e8f4f14d53f2128f20b4c66280a4835d6172b9a0c6eae10db3d40c6e

SHA512
fff711a3239123e7099f6b151167312b64ce82a846888569b5f8bf8b8cab835546a33220118338f0ed015980f4fd8547302c778ae1e33ca09e88d74f7ee332ad

Download Submit
memory/4608-11-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-45-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-5-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-37-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-41-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-39-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-33-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-29-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-25-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-21-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-17-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-0-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-64-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-31-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-43-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-3-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-27-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-23-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-19-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-15-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-13-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-7-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-1-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-2-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4608-9-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/4720-54-0x0000000010000000-0x0000000010231000-memory.dmp

Filesize
2.2MB

Download

Analysis

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