gh0strat | 5284b41a942a7ce0db09733b3fae7fce6c786655925f1f3b00af0ea6dc962994

General

Target

5284b41a942a7ce0db09733b3fae7fce6c786655925f1f3b00af0ea6dc962994.dll
Size

16KB
MD5

4b93403aa76bc215e41544050406b18f
SHA1

8667a7098d119e9da706a135836c4f3e55872f17
SHA256

5284b41a942a7ce0db09733b3fae7fce6c786655925f1f3b00af0ea6dc962994
SHA512

883a40659012ec0b4678edf576b30e4936725bf1d9d802a30aa8d91fd7e61b5d8987003fc10c20629a8c0894ae2815077f96b1a798523a193bc5e22c3178d3dd
SSDEEP

192:1OIt31YVamI3X3PGR6yIM402ZJZ8d9iiiiiiiTSNNVJ8im6XS+XSyyd:1V91fm4nPG57qjCdiwNVvSmSy

Score

10^/10

gh0strat purplefox persistence rat rootkit trojan upx

Malware Config

Signatures

Detect PurpleFox Rootkit 5 IoCs

Detect PurpleFox Rootkit.

rootkit

Processes:

resource	yara_rule
behavioral1/memory/2800-163-0x0000000010000000-0x0000000010040000-memory.dmp	purplefox_rootkit
behavioral1/memory/2800-165-0x0000000010000000-0x0000000010040000-memory.dmp	purplefox_rootkit
behavioral1/memory/2800-164-0x0000000010000000-0x0000000010040000-memory.dmp	purplefox_rootkit
behavioral1/memory/2800-167-0x0000000010000000-0x0000000010040000-memory.dmp	purplefox_rootkit
behavioral1/memory/2800-240-0x0000000010000000-0x0000000010040000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2800-229-0x0000000003570000-0x00000000035E4000-memory.dmp	family_gh0strat

Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat
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 8 IoCs

Processes:

rundll32.exe

flow	pid	process
9	2800	rundll32.exe
19	2800	rundll32.exe
27	2800	rundll32.exe
28	2800	rundll32.exe
31	2800	rundll32.exe
44	2800	rundll32.exe
45	2800	rundll32.exe
49	2800	rundll32.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2800-160-0x0000000010000000-0x0000000010040000-memory.dmp	upx
behavioral1/memory/2800-163-0x0000000010000000-0x0000000010040000-memory.dmp	upx
behavioral1/memory/2800-165-0x0000000010000000-0x0000000010040000-memory.dmp	upx
behavioral1/memory/2800-164-0x0000000010000000-0x0000000010040000-memory.dmp	upx
behavioral1/memory/2800-167-0x0000000010000000-0x0000000010040000-memory.dmp	upx
behavioral1/memory/2800-240-0x0000000010000000-0x0000000010040000-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-1-5-21-1529757233-3489015626-3409890339-1000\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)	\??\I:	rundll32.exe
File opened (read-only)	\??\K:	rundll32.exe
File opened (read-only)	\??\M:	rundll32.exe
File opened (read-only)	\??\V:	rundll32.exe
File opened (read-only)	\??\X:	rundll32.exe
File opened (read-only)	\??\B:	rundll32.exe
File opened (read-only)	\??\E:	rundll32.exe
File opened (read-only)	\??\F:	rundll32.exe
File opened (read-only)	\??\O:	rundll32.exe
File opened (read-only)	\??\P:	rundll32.exe
File opened (read-only)	\??\R:	rundll32.exe
File opened (read-only)	\??\T:	rundll32.exe
File opened (read-only)	\??\U:	rundll32.exe
File opened (read-only)	\??\H:	rundll32.exe
File opened (read-only)	\??\J:	rundll32.exe
File opened (read-only)	\??\N:	rundll32.exe
File opened (read-only)	\??\Z:	rundll32.exe
File opened (read-only)	\??\G:	rundll32.exe
File opened (read-only)	\??\S:	rundll32.exe
File opened (read-only)	\??\W:	rundll32.exe
File opened (read-only)	\??\L:	rundll32.exe
File opened (read-only)	\??\Q:	rundll32.exe
File opened (read-only)	\??\Y:	rundll32.exe

Drops file in System32 directory 11 IoCs

Processes:

svchost.exe

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

4112 taskkill.exe

pid	process
4112	taskkill.exe

Modifies registry class 2 IoCs

Processes:

explorer.exemspaint.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000_Classes\Local Settings	mspaint.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

mspaint.exerundll32.exe

pid	process
4300	mspaint.exe
4300	mspaint.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe
2800	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 4112 taskkill.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

mspaint.exeOpenWith.exe

pid process

4300 mspaint.exe
2932 OpenWith.exe

description	pid	process
Token: SeDebugPrivilege	4112	taskkill.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

rundll32.exerundll32.execmd.exeexplorer.exe

description	pid	process	target process
PID 1456 wrote to memory of 2800	1456	rundll32.exe	rundll32.exe
PID 1456 wrote to memory of 2800	1456	rundll32.exe	rundll32.exe
PID 1456 wrote to memory of 2800	1456	rundll32.exe	rundll32.exe
PID 2800 wrote to memory of 904	2800	rundll32.exe	explorer.exe
PID 2800 wrote to memory of 904	2800	rundll32.exe	explorer.exe
PID 2800 wrote to memory of 904	2800	rundll32.exe	explorer.exe
PID 2800 wrote to memory of 4616	2800	rundll32.exe	cmd.exe
PID 2800 wrote to memory of 4616	2800	rundll32.exe	cmd.exe
PID 2800 wrote to memory of 4616	2800	rundll32.exe	cmd.exe
PID 4616 wrote to memory of 4112	4616	cmd.exe	taskkill.exe
PID 4616 wrote to memory of 4112	4616	cmd.exe	taskkill.exe
PID 4616 wrote to memory of 4112	4616	cmd.exe	taskkill.exe
PID 1256 wrote to memory of 4300	1256	explorer.exe	mspaint.exe
PID 1256 wrote to memory of 4300	1256	explorer.exe	mspaint.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5284b41a942a7ce0db09733b3fae7fce6c786655925f1f3b00af0ea6dc962994.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1456

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5284b41a942a7ce0db09733b3fae7fce6c786655925f1f3b00af0ea6dc962994.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:2800

C:\Windows\SysWOW64\explorer.exe
explorer.exe C:\Users\Public\Downloads\1.JPG
3⤵
PID:904

C:\Windows\SysWOW64\cmd.exe
cmd /c taskkill /f /im hh.exe
3⤵
- Suspicious use of WriteProcessMemory
PID:4616

C:\Windows\SysWOW64\taskkill.exe
taskkill /f /im hh.exe
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4112

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1256

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:4300

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s DsSvc
1⤵
- Drops file in System32 directory
PID:3780

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Suspicious use of SetWindowsHookEx
PID:2932

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\bScreen.dll
Filesize
399KB

MD5
07de1a5064bcc7a55fd5c6c59492b9a8

SHA1
f38a752ed7303798d55d41b9cd938b6789261be5

SHA256
011cc062733e526c3ac051e9bc02535499023e4d22d313477e50bd9ecc42a10d

SHA512
9e595be498a8ef04f8700219cc5757b39a47d8e89da0c4c34f0addbcaa3386d6dd9fdb47a07dda5d0e7ee746e25317912d0daf23db85127ec5be1f93b6452b20

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

MD5
e0e247b326e27324551e1514e6815f7d

SHA1
6bc8e157ab59c032fc5b28f5c573d462dcef54c2

SHA256
0eee81df330948e743bba1bd68ef0b00febfd44cdd6d0ace41ca74cdafc5c39d

SHA512
579efdd583953e398eab9160a7d2584a4db88c00213f3d7ce4b4cb3019fd603dca466704a20305e4fa8320bac2f3b99429295dab2ef843a1b308f3be7f998c4a

Download Submit
memory/2800-159-0x0000000002FF0000-0x000000000303F000-memory.dmp

Filesize
316KB

Download
memory/2800-240-0x0000000010000000-0x0000000010040000-memory.dmp

Filesize
256KB

Download
memory/2800-229-0x0000000003570000-0x00000000035E4000-memory.dmp

Filesize
464KB

Download
memory/2800-167-0x0000000010000000-0x0000000010040000-memory.dmp

Filesize
256KB

Download
memory/2800-164-0x0000000010000000-0x0000000010040000-memory.dmp

Filesize
256KB

Download
memory/2800-165-0x0000000010000000-0x0000000010040000-memory.dmp

Filesize
256KB

Download
memory/2800-163-0x0000000010000000-0x0000000010040000-memory.dmp

Filesize
256KB

Download
memory/2800-160-0x0000000010000000-0x0000000010040000-memory.dmp

Filesize
256KB

Download
memory/3780-151-0x000001FFA15A0000-0x000001FFA15A1000-memory.dmp

Filesize
4KB

Download
memory/3780-157-0x000001FFA1630000-0x000001FFA1631000-memory.dmp

Filesize
4KB

Download
memory/3780-156-0x000001FFA1630000-0x000001FFA1631000-memory.dmp

Filesize
4KB

Download
memory/3780-155-0x000001FFA1630000-0x000001FFA1631000-memory.dmp

Filesize
4KB

Download
memory/3780-154-0x000001FFA1630000-0x000001FFA1631000-memory.dmp

Filesize
4KB

Download
memory/3780-153-0x000001FFA15A0000-0x000001FFA15A1000-memory.dmp

Filesize
4KB

Download
memory/3780-149-0x000001FFA1520000-0x000001FFA1521000-memory.dmp

Filesize
4KB

Download
memory/3780-142-0x000001FF99260000-0x000001FF99270000-memory.dmp

Filesize
64KB

Download
memory/3780-138-0x000001FF98990000-0x000001FF989A0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads