wshrat | bf99dfce3ae6d9fd2b54471c7de258d38113ac687b59b8233099190b0d05ba69

Analysis

max time kernel
145s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/12/2023, 01:26

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General

Target
PO-2301219.pdf.js
Size 7KB
Sample231220-bthw7shdc4
SHA256 bf99dfce3ae6d9fd2b54471c7de258d38113ac687b59b8233099190b0d05ba69
MD5 5fe7d726ea15e34b1f6a1714ddb48d87
SHA1 2cdb4dce092ca63a1ed167b9c6243e507c9c3fa7
SHA512 123c9af8aa20f3ef1369080104c3b34a615424a1c23e7d944ef8aa7d18c9106d120229edbff5995748da17433ee8017c6750a5dadab805bdaa805bffc9bc4988
SSDEEP 192:P51E/Nv/s2CG85Y1aPhTjF+fNn1cZT5Bpf7ACVC6Tiz+9gWv5hkUyVoCZVmYl:P51E/Nv/s2CG85Y1aPhTjF+fNn1cZT5o
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wshrat persistence trojan

Malware Config

Extracted

Family

wshrat

http://chongmei33.publicvm.com:7045

Signatures

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

Blocklisted process makes network request 27 IoCs

flow	pid	Process
4	3372	wscript.exe
8	3372	wscript.exe
39	3200	WScript.exe
41	3200	WScript.exe
42	3200	WScript.exe
43	3200	WScript.exe
61	3200	WScript.exe
62	3200	WScript.exe
63	3200	WScript.exe
66	3200	WScript.exe
68	3200	WScript.exe
73	3200	WScript.exe
74	3200	WScript.exe
75	3200	WScript.exe
76	3200	WScript.exe
77	3200	WScript.exe
81	3200	WScript.exe
84	3200	WScript.exe
85	3200	WScript.exe
86	3200	WScript.exe
87	3200	WScript.exe
88	3200	WScript.exe
89	3200	WScript.exe
90	3200	WScript.exe
91	3200	WScript.exe
92	3200	WScript.exe
93	3200	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XKAOHZ.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XKAOHZ.vbs	WScript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XKAOHZ = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\XKAOHZ.vbs\""	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XKAOHZ = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\XKAOHZ.vbs\""	WScript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000_Classes\Local Settings	wscript.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3372 wrote to memory of 3200	3372	wscript.exe	92
PID 3372 wrote to memory of 3200	3372	wscript.exe	92

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\PO-2301219.pdf.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3372
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\XKAOHZ.vbs"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:3200

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

XKAOHZ.vbs

Path C:\Users\Admin\AppData\Local\Temp\XKAOHZ.vbs
Size 268KB
SHA256 bd66de58178ed9c5ce98b26288dbfebd1e0f6190f95be5a2aee1480b854f5f61
MD5 6ead7106bbf17e28f6eb363c59bea345
SHA1 eb8506790f0b0c582828675c785063046e6117e1
SHA512 866b55f1e27d31bda2c7e181b9680c69b4dcb1952f02bd6d72eb21ba341fa7bda6d9d6046bb948ffcc347c33f08fdcfaa2414b51bd38d605ac94843791f92524
SSDEEP 384:azlRu32LGLKsk09snlQbuKbQ9lbTu9MWkUTK7b7A4FDF7s7+Dvd4g4Ywz5+C7OtZ:ug72
MD5 SHA1 SHA512 SSDEEP

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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