purplefox | 6ee397be7161e5dbeff42fab80346d0d07257b2dffe1138f1f5f92fa2c09e258

General

Target

6ee397be7161e5dbeff42fab80346d0d07257b2dffe1138f1f5f92fa2c09e258.dll
Size

16KB
MD5

a90cedc78c9fadd943586c7e0f702365
SHA1

c4708a36513e3112f959ffcfe33534a949f3ef1d
SHA256

6ee397be7161e5dbeff42fab80346d0d07257b2dffe1138f1f5f92fa2c09e258
SHA512

674106b56265d13ff090c6c6e7633ba4e0cdd765072b90ef28c3603c703af47db09ad756bb0e21b88de79a09d94c1f6372636a6b82ea6ce6d05dc46cfbd24a11
SSDEEP

192:1OIt31YVamI3X3PGR6ylM402ZJZ8d9iiiiiiiTSNNVJ8im6XS+XSyyd:1V91fm4nPG5KqjCdiwNVvSmSy

Score

10^/10

purplefox persistence rootkit trojan upx

Malware Config

Signatures

Detect PurpleFox Rootkit 3 IoCs

Detect PurpleFox Rootkit.

rootkit

Processes:

resource	yara_rule
behavioral1/memory/1176-163-0x0000000010000000-0x0000000010040000-memory.dmp	purplefox_rootkit
behavioral1/memory/1176-164-0x0000000010000000-0x0000000010040000-memory.dmp	purplefox_rootkit
behavioral1/memory/1176-165-0x0000000010000000-0x0000000010040000-memory.dmp	purplefox_rootkit

PurpleFox
PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.
rootkit trojan purplefox
Blocklisted process makes network request 3 IoCs

Processes:

rundll32.exe

flow pid process

4 1176 rundll32.exe
7 1176 rundll32.exe
27 1176 rundll32.exe

flow	pid	process
4	1176	rundll32.exe
7	1176	rundll32.exe
27	1176	rundll32.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1176-160-0x0000000010000000-0x0000000010040000-memory.dmp	upx
behavioral1/memory/1176-163-0x0000000010000000-0x0000000010040000-memory.dmp	upx
behavioral1/memory/1176-164-0x0000000010000000-0x0000000010040000-memory.dmp	upx
behavioral1/memory/1176-165-0x0000000010000000-0x0000000010040000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ÏµÍ³À¶ÆÁÐÞ¸´ = "C:\\Windows\\SysWOW64\\rundll32.exe"	rundll32.exe

Enumerates connected drives 3 TTPs 23 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

Processes:

rundll32.exe

description	ioc	process
File opened (read-only)	\??\W:	rundll32.exe
File opened (read-only)	\??\Y:	rundll32.exe
File opened (read-only)	\??\B:	rundll32.exe
File opened (read-only)	\??\K:	rundll32.exe
File opened (read-only)	\??\R:	rundll32.exe
File opened (read-only)	\??\T:	rundll32.exe
File opened (read-only)	\??\V:	rundll32.exe
File opened (read-only)	\??\H:	rundll32.exe
File opened (read-only)	\??\M:	rundll32.exe
File opened (read-only)	\??\P:	rundll32.exe
File opened (read-only)	\??\X:	rundll32.exe
File opened (read-only)	\??\I:	rundll32.exe
File opened (read-only)	\??\J:	rundll32.exe
File opened (read-only)	\??\L:	rundll32.exe
File opened (read-only)	\??\O:	rundll32.exe
File opened (read-only)	\??\Q:	rundll32.exe
File opened (read-only)	\??\U:	rundll32.exe
File opened (read-only)	\??\Z:	rundll32.exe
File opened (read-only)	\??\E:	rundll32.exe
File opened (read-only)	\??\F:	rundll32.exe
File opened (read-only)	\??\G:	rundll32.exe
File opened (read-only)	\??\N:	rundll32.exe
File opened (read-only)	\??\S:	rundll32.exe

Drops file in System32 directory 11 IoCs

Processes:

svchost.exe

description	ioc	process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSTokenDB2.jfm	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSTokenDB2.dat	svchost.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.log	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSSres00001.jrs	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSSres00002.jrs	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.chk	svchost.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSTokenDB2.dat	svchost.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.chk	svchost.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.jcp	svchost.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.jtx	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSStmp.log	svchost.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	rundll32.exe

Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

3312 taskkill.exe

pid	process
3312	taskkill.exe

Modifies registry class 2 IoCs

Processes:

explorer.exemspaint.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000_Classes\Local Settings	mspaint.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

mspaint.exerundll32.exe

pid	process
3180	mspaint.exe
3180	mspaint.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe
1176	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 3312 taskkill.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

mspaint.exeOpenWith.exe

pid process

3180 mspaint.exe
4176 OpenWith.exe

description	pid	process
Token: SeDebugPrivilege	3312	taskkill.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

rundll32.exerundll32.execmd.exeexplorer.exe

description	pid	process	target process
PID 2736 wrote to memory of 1176	2736	rundll32.exe	rundll32.exe
PID 2736 wrote to memory of 1176	2736	rundll32.exe	rundll32.exe
PID 2736 wrote to memory of 1176	2736	rundll32.exe	rundll32.exe
PID 1176 wrote to memory of 5008	1176	rundll32.exe	explorer.exe
PID 1176 wrote to memory of 5008	1176	rundll32.exe	explorer.exe
PID 1176 wrote to memory of 5008	1176	rundll32.exe	explorer.exe
PID 1176 wrote to memory of 4536	1176	rundll32.exe	cmd.exe
PID 1176 wrote to memory of 4536	1176	rundll32.exe	cmd.exe
PID 1176 wrote to memory of 4536	1176	rundll32.exe	cmd.exe
PID 4536 wrote to memory of 3312	4536	cmd.exe	taskkill.exe
PID 4536 wrote to memory of 3312	4536	cmd.exe	taskkill.exe
PID 4536 wrote to memory of 3312	4536	cmd.exe	taskkill.exe
PID 864 wrote to memory of 3180	864	explorer.exe	mspaint.exe
PID 864 wrote to memory of 3180	864	explorer.exe	mspaint.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6ee397be7161e5dbeff42fab80346d0d07257b2dffe1138f1f5f92fa2c09e258.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2736

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6ee397be7161e5dbeff42fab80346d0d07257b2dffe1138f1f5f92fa2c09e258.dll,#1
2⤵
- Blocklisted process makes network request
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1176

C:\Windows\SysWOW64\explorer.exe
explorer.exe C:\Users\Public\Downloads\1.JPG
3⤵
PID:5008

C:\Windows\SysWOW64\cmd.exe
cmd /c taskkill /f /im hh.exe
3⤵
- Suspicious use of WriteProcessMemory
PID:4536

C:\Windows\SysWOW64\taskkill.exe
taskkill /f /im hh.exe
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3312

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:864

C:\Windows\system32\mspaint.exe
"C:\Windows\system32\mspaint.exe" "C:\Users\Public\Downloads\1.JPG" /ForceBootstrapPaint3D
2⤵
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:3180

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s DsSvc
1⤵
- Drops file in System32 directory
PID:3432

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Suspicious use of SetWindowsHookEx
PID:4176

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Public\Downloads\1.JPG
Filesize
102KB

MD5
e0e247b326e27324551e1514e6815f7d

SHA1
6bc8e157ab59c032fc5b28f5c573d462dcef54c2

SHA256
0eee81df330948e743bba1bd68ef0b00febfd44cdd6d0ace41ca74cdafc5c39d

SHA512
579efdd583953e398eab9160a7d2584a4db88c00213f3d7ce4b4cb3019fd603dca466704a20305e4fa8320bac2f3b99429295dab2ef843a1b308f3be7f998c4a

Download Submit
memory/1176-165-0x0000000010000000-0x0000000010040000-memory.dmp

Filesize
256KB

Download
memory/1176-164-0x0000000010000000-0x0000000010040000-memory.dmp

Filesize
256KB

Download
memory/1176-163-0x0000000010000000-0x0000000010040000-memory.dmp

Filesize
256KB

Download
memory/1176-160-0x0000000010000000-0x0000000010040000-memory.dmp

Filesize
256KB

Download
memory/1176-159-0x00000000026B0000-0x00000000026FF000-memory.dmp

Filesize
316KB

Download
memory/3432-154-0x000001C912EF0000-0x000001C912EF1000-memory.dmp

Filesize
4KB

Download
memory/3432-155-0x000001C912F00000-0x000001C912F01000-memory.dmp

Filesize
4KB

Download
memory/3432-156-0x000001C912F00000-0x000001C912F01000-memory.dmp

Filesize
4KB

Download
memory/3432-157-0x000001C912F00000-0x000001C912F01000-memory.dmp

Filesize
4KB

Download
memory/3432-153-0x000001C912E60000-0x000001C912E61000-memory.dmp

Filesize
4KB

Download
memory/3432-151-0x000001C912E60000-0x000001C912E61000-memory.dmp

Filesize
4KB

Download
memory/3432-149-0x000001C912DE0000-0x000001C912DE1000-memory.dmp

Filesize
4KB

Download
memory/3432-142-0x000001C90A190000-0x000001C90A1A0000-memory.dmp

Filesize
64KB

Download
memory/3432-138-0x000001C90A150000-0x000001C90A160000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads