wshrat | e860516a4fe33da6bc6476a4bfd4d1bf3eb154f649a52bd94c56b9bfd0b6360d

Analysis

max time kernel
145s
max time network
148s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
27-02-2023 08:36

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General

Target

MT103-CASH_TRANSFER.pdf.vbs
Size

204KB
MD5

c7f700216276af81e05bf12c7650f776
SHA1

b2d4e89dfb652f73fbb0551c912682a0e38403c4
SHA256

e860516a4fe33da6bc6476a4bfd4d1bf3eb154f649a52bd94c56b9bfd0b6360d
SHA512

d8c6a27e07195579752ba17a67d7aae87ba269cde729fd837ed7e301ecf29adae6c8e607805756a06a2fe593fb6d0271b81cd2fde56eefa200e45281eb384d60
SSDEEP

768:1LHYKIi81ZdqfsaBMKO5+rX5qJrgLS4JSr1NDFD6yaf6Nlr0TuNtrDuNqDuNm4uE:PflyR6XQHG

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 20 IoCs

flow	pid	Process
4	1676	WScript.exe
5	1676	WScript.exe
6	1676	WScript.exe
8	1676	WScript.exe
10	1676	WScript.exe
11	1676	WScript.exe
13	1676	WScript.exe
14	1676	WScript.exe
15	1676	WScript.exe
17	1676	WScript.exe
18	1676	WScript.exe
19	1676	WScript.exe
21	1676	WScript.exe
22	1676	WScript.exe
25	1676	WScript.exe
26	1676	WScript.exe
28	1676	WScript.exe
29	1676	WScript.exe
30	1676	WScript.exe
32	1676	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MT103-CASH_TRANSFER.pdf.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MT103-CASH_TRANSFER.pdf.vbs	WScript.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\MT103-CASH_TRANSFER = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\MT103-CASH_TRANSFER.pdf.vbs\""	WScript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MT103-CASH_TRANSFER = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\MT103-CASH_TRANSFER.pdf.vbs\""	WScript.exe

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

System Information Discovery
T1082

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\MT103-CASH_TRANSFER.pdf.vbs"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:1676

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MT103-CASH_TRANSFER.pdf.vbs

Filesize
204KB

MD5
c7f700216276af81e05bf12c7650f776

SHA1
b2d4e89dfb652f73fbb0551c912682a0e38403c4

SHA256
e860516a4fe33da6bc6476a4bfd4d1bf3eb154f649a52bd94c56b9bfd0b6360d

SHA512
d8c6a27e07195579752ba17a67d7aae87ba269cde729fd837ed7e301ecf29adae6c8e607805756a06a2fe593fb6d0271b81cd2fde56eefa200e45281eb384d60

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