wshrat | 7714602b44e30e482f50789f308caf60998c93d667ada525934f104ec4bbf8a1

General

Target

1c1f3eaf142c53480147c6e98cea4547.doc
Size

35KB
MD5

1c1f3eaf142c53480147c6e98cea4547
SHA1

92fbb5db21194832b830e4f5c44449c582138b50
SHA256

42e299adf74331dc51950a2e0195d4f3230170358b362463cb1f113bc5755e6e
SHA512

9a3a8bce2902a5be9c26bff283968161aca0237162f30a129c97fc65b9f52aa1cb724310ff9767967e1a6e360bf36432448df0e0fd542bdc0ab2477e254de540
SSDEEP

384:A8iSUR/8det0Vyw/v+2iUP0jDeT1Jtl/+qTQ:i/quCTiy4eFU

Score

10^/10

wshrat persistence trojan

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

WScript.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE is not expected to spawn this process	3824	1928	WScript.exe	WINWORD.EXE

WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

WSHRAT payload 4 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\Desktop\Server.js	family_wshrat
C:\Users\Admin\AppData\Local\Temp\Server.js	family_wshrat
C:\Users\Admin\AppData\Local\Temp\Server.js	family_wshrat
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Server.js	family_wshrat

Blocklisted process makes network request 21 IoCs

Processes:

wscript.exe

flow	pid	process
22	180	wscript.exe
23	180	wscript.exe
29	180	wscript.exe
36	180	wscript.exe
56	180	wscript.exe
70	180	wscript.exe
85	180	wscript.exe
95	180	wscript.exe
104	180	wscript.exe
113	180	wscript.exe
130	180	wscript.exe
131	180	wscript.exe
132	180	wscript.exe
133	180	wscript.exe
135	180	wscript.exe
136	180	wscript.exe
137	180	wscript.exe
138	180	wscript.exe
139	180	wscript.exe
140	180	wscript.exe
141	180	wscript.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

WScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 2 IoCs

Processes:

WScript.exewscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Server.js	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Server.js	wscript.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wscript.exeWScript.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Server = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Server.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Server = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Server.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Server = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Server.js\""	WScript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Server = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Server.js\""	WScript.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

21 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
21	ip-api.com

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Script User-Agent 1 IoCs
Uses user-agent string associated with script host/environment.

Processes:

description flow ioc

HTTP User-Agent header 19 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid process

1928 WINWORD.EXE
1928 WINWORD.EXE
Suspicious use of SetWindowsHookEx 7 IoCs

Processes:

WINWORD.EXE

pid process

1928 WINWORD.EXE
1928 WINWORD.EXE
1928 WINWORD.EXE
1928 WINWORD.EXE
1928 WINWORD.EXE
1928 WINWORD.EXE
1928 WINWORD.EXE

description	flow	ioc
HTTP User-Agent header	19	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

pid	process
1928	WINWORD.EXE
1928	WINWORD.EXE

pid	process
1928	WINWORD.EXE
1928	WINWORD.EXE
1928	WINWORD.EXE
1928	WINWORD.EXE
1928	WINWORD.EXE
1928	WINWORD.EXE
1928	WINWORD.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

WINWORD.EXEWScript.exe

description	pid	process	target process
PID 1928 wrote to memory of 3824	1928	WINWORD.EXE	WScript.exe
PID 1928 wrote to memory of 3824	1928	WINWORD.EXE	WScript.exe
PID 3824 wrote to memory of 180	3824	WScript.exe	wscript.exe
PID 3824 wrote to memory of 180	3824	WScript.exe	wscript.exe

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\1c1f3eaf142c53480147c6e98cea4547.doc" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1928

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\Desktop\Server.js"
2⤵
- Process spawned unexpected child process
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3824

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Local\Temp\Server.js"
3⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:180

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Server.js
Filesize
184KB

MD5
254e40fd67e1e3b04aadfdb76610b195

SHA1
22341c09fe29aa58e4d474094ee96dfa7fd7f67e

SHA256
c6a0b8b775a97968121c2f8db4892e609a1cbfbf05a546c81c67de7cfbe45506

SHA512
2967ca09010fa0aa6ad761183c8ae5f1e9581ec7b65b6e65af3e06ad7cb669993096c7eccfb2427e7c92a0ed835e02fff5bba4a457d806a784cde6673a632e8b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Server.js
Filesize
184KB

MD5
254e40fd67e1e3b04aadfdb76610b195

SHA1
22341c09fe29aa58e4d474094ee96dfa7fd7f67e

SHA256
c6a0b8b775a97968121c2f8db4892e609a1cbfbf05a546c81c67de7cfbe45506

SHA512
2967ca09010fa0aa6ad761183c8ae5f1e9581ec7b65b6e65af3e06ad7cb669993096c7eccfb2427e7c92a0ed835e02fff5bba4a457d806a784cde6673a632e8b

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Server.js
Filesize
184KB

MD5
254e40fd67e1e3b04aadfdb76610b195

SHA1
22341c09fe29aa58e4d474094ee96dfa7fd7f67e

SHA256
c6a0b8b775a97968121c2f8db4892e609a1cbfbf05a546c81c67de7cfbe45506

SHA512
2967ca09010fa0aa6ad761183c8ae5f1e9581ec7b65b6e65af3e06ad7cb669993096c7eccfb2427e7c92a0ed835e02fff5bba4a457d806a784cde6673a632e8b

Download Submit
C:\Users\Admin\Desktop\Server.js
Filesize
184KB

MD5
254e40fd67e1e3b04aadfdb76610b195

SHA1
22341c09fe29aa58e4d474094ee96dfa7fd7f67e

SHA256
c6a0b8b775a97968121c2f8db4892e609a1cbfbf05a546c81c67de7cfbe45506

SHA512
2967ca09010fa0aa6ad761183c8ae5f1e9581ec7b65b6e65af3e06ad7cb669993096c7eccfb2427e7c92a0ed835e02fff5bba4a457d806a784cde6673a632e8b

Download Submit
memory/1928-137-0x00007FFC49050000-0x00007FFC49060000-memory.dmp

Filesize
64KB

Download
memory/1928-138-0x00007FFC46C50000-0x00007FFC46C60000-memory.dmp

Filesize
64KB

Download
memory/1928-139-0x00007FFC46C50000-0x00007FFC46C60000-memory.dmp

Filesize
64KB

Download
memory/1928-133-0x00007FFC49050000-0x00007FFC49060000-memory.dmp

Filesize
64KB

Download
memory/1928-136-0x00007FFC49050000-0x00007FFC49060000-memory.dmp

Filesize
64KB

Download
memory/1928-134-0x00007FFC49050000-0x00007FFC49060000-memory.dmp

Filesize
64KB

Download
memory/1928-135-0x00007FFC49050000-0x00007FFC49060000-memory.dmp

Filesize
64KB

Download
memory/1928-172-0x00000260E67A0000-0x00000260E67C9000-memory.dmp

Filesize
164KB

Download
memory/1928-216-0x00007FFC49050000-0x00007FFC49060000-memory.dmp

Filesize
64KB

Download
memory/1928-217-0x00007FFC49050000-0x00007FFC49060000-memory.dmp

Filesize
64KB

Download
memory/1928-218-0x00007FFC49050000-0x00007FFC49060000-memory.dmp

Filesize
64KB

Download
memory/1928-219-0x00007FFC49050000-0x00007FFC49060000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads