wshrat | 16a27aa2787082203e92198e34460ab8c8cb1d9dc061cfa1848b5d474133e546

General

Target
16a27aa2787082203e92198e34460ab8c8cb1d9dc061cfa1848b5d474133e546.exe
Size 624KB
Sample220415-glx9tabee9
SHA256 16a27aa2787082203e92198e34460ab8c8cb1d9dc061cfa1848b5d474133e546
MD5 f5a975d81ed8a1b195c7c1274a6fc59f
SHA1 2e62c1bed99214c1ff95eb76ababe9378dd441f5
SHA512 11e6ad19b4941caace4c04d14287060525a125eb92deda7a51d8ef88dc2f19e6ab8b279a0dfd6450d83663fc265078c55c591a3107183a4fd2e00d111e15908c
MD5 SHA1 SHA512

Score

10^/10

wshrat persistence trojan

Malware Config

Signatures

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

WSHRAT Payload 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002313e-133.dat	family_wshrat

Blocklisted process makes network request 18 IoCs

flow	pid	Process
2	1676	wscript.exe
3	1676	wscript.exe
6	1676	wscript.exe
7	1676	wscript.exe
10	1676	wscript.exe
13	1676	wscript.exe
14	1676	wscript.exe
15	1676	wscript.exe
16	1676	wscript.exe
17	1676	wscript.exe
18	1676	wscript.exe
19	1676	wscript.exe
20	1676	wscript.exe
21	1676	wscript.exe
22	1676	wscript.exe
23	1676	wscript.exe
24	1676	wscript.exe
25	1676	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-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	16a27aa2787082203e92198e34460ab8c8cb1d9dc061cfa1848b5d474133e546.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xTngY.vbs	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xTngY.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-1-5-21-2632097139-1792035885-811742494-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xTngY = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\xTngY.vbs\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\WOW6432Node\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\xTngY = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\xTngY.vbs\""	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.

flow	ioc
1	ip-api.com

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 948 wrote to memory of 1676	948	16a27aa2787082203e92198e34460ab8c8cb1d9dc061cfa1848b5d474133e546.exe	75
PID 948 wrote to memory of 1676	948	16a27aa2787082203e92198e34460ab8c8cb1d9dc061cfa1848b5d474133e546.exe	75
PID 948 wrote to memory of 1676	948	16a27aa2787082203e92198e34460ab8c8cb1d9dc061cfa1848b5d474133e546.exe	75

C:\Users\Admin\AppData\Local\Temp\16a27aa2787082203e92198e34460ab8c8cb1d9dc061cfa1848b5d474133e546.exe
"C:\Users\Admin\AppData\Local\Temp\16a27aa2787082203e92198e34460ab8c8cb1d9dc061cfa1848b5d474133e546.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:948
- C:\Windows\SysWOW64\wscript.exe
  "C:\Windows\System32\wscript.exe" C:\Users\Admin\AppData\Roaming\xTngY.vbs
  2⤵
  - 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

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

xTngY.vbs

Path C:\Users\Admin\AppData\Roaming\xTngY.vbs
Size 180KB
SHA256 3c981f0b3cfc131a77f4786219e0da3152af373a1068452cc76fb07384f9e3da
MD5 a10dc8895861cc4793dde0e05ef905a2
SHA1 ec0cc1930b8cbf95cc29b9db980d4a8e829319e6
SHA512 4cea8664a202aa0e02f79ae3badd9e9018fa473356fcab85c577d60270502125db2be2486826673834fc39e8447ea4a107fdb55ae5456d320ca7878fd4adc4bb
SSDEEP 3072:8Ag8xSKAmshISeWJQ0bamQvEz7ZAbURC3eGK/6xbIpklgVDSxGfmuZ1D:8Ag8xS5mshISeWmM6iRC3eGKoAklgF28
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/948-130-0x0000000000660000-0x0000000000702000-memory.dmp

Download

memory/948-131-0x0000000004F80000-0x000000000501C000-memory.dmp