wshrat | 0508ed9357a104ac884b78d8bfe3dc7a21ac3aff689115055856452df8ea3a87

General

Target

PO 20091827994.js
Size

188KB
MD5

e4a7014bfead25288d47e334a826bb70
SHA1

0ba7cb74c5339cfaf5f8043bced60b6f0e9be74f
SHA256

0508ed9357a104ac884b78d8bfe3dc7a21ac3aff689115055856452df8ea3a87
SHA512

7349bc7b6336fcd9fda695fbb2ddbbfc6353d65c1c22910878142426921673c9fe646c7e238a69c26bd177e8a0cfd3a353761b6a0b4840372087d92bb73f7744
SSDEEP

3072:rTsQ0bamIbIpklgVDSxGfmuZzAvEzYbURCBqZdg8piAZmC54leGK/6N:rvMoAklgF2GuuZzwERC5fC54leGKm

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 3 IoCs

resource	yara_rule
behavioral1/files/0x000a000000012673-58.dat	family_wshrat
behavioral1/files/0x00090000000126ed-59.dat	family_wshrat
behavioral1/files/0x00090000000126ed-60.dat	family_wshrat

Blocklisted process makes network request 21 IoCs

flow	pid	Process
4	1204	wscript.exe
6	1204	wscript.exe
7	1204	wscript.exe
8	1204	wscript.exe
10	1204	wscript.exe
12	1204	wscript.exe
13	1204	wscript.exe
15	1204	wscript.exe
16	1204	wscript.exe
17	1204	wscript.exe
19	1204	wscript.exe
20	1204	wscript.exe
21	1204	wscript.exe
23	1204	wscript.exe
24	1204	wscript.exe
25	1204	wscript.exe
27	1204	wscript.exe
28	1204	wscript.exe
29	1204	wscript.exe
31	1204	wscript.exe
32	1204	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO 20091827994.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO 20091827994.js	wscript.exe

Adds Run key to start application 2 TTPs 8 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\PO 20091827994 = "wscript.exe //B \"C:\\Users\\Admin\\PO 20091827994.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\PO 20091827994 = "wscript.exe //B \"C:\\Users\\Admin\\PO 20091827994.js\""	wscript.exe
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\PO 20091827994 = "wscript.exe //B \"C:\\Users\\Admin\\PO 20091827994.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\PO 20091827994 = "wscript.exe //B \"C:\\Users\\Admin\\PO 20091827994.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.

flow	ioc
3	ip-api.com

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 1204	1644	wscript.exe	28
PID 1644 wrote to memory of 1204	1644	wscript.exe	28
PID 1644 wrote to memory of 1204	1644	wscript.exe	28

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\PO 20091827994.js"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1644
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\PO 20091827994.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:1204

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO 20091827994.js

Filesize
188KB

MD5
e4a7014bfead25288d47e334a826bb70

SHA1
0ba7cb74c5339cfaf5f8043bced60b6f0e9be74f

SHA256
0508ed9357a104ac884b78d8bfe3dc7a21ac3aff689115055856452df8ea3a87

SHA512
7349bc7b6336fcd9fda695fbb2ddbbfc6353d65c1c22910878142426921673c9fe646c7e238a69c26bd177e8a0cfd3a353761b6a0b4840372087d92bb73f7744

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO 20091827994.js

Filesize
188KB

MD5
e4a7014bfead25288d47e334a826bb70

SHA1
0ba7cb74c5339cfaf5f8043bced60b6f0e9be74f

SHA256
0508ed9357a104ac884b78d8bfe3dc7a21ac3aff689115055856452df8ea3a87

SHA512
7349bc7b6336fcd9fda695fbb2ddbbfc6353d65c1c22910878142426921673c9fe646c7e238a69c26bd177e8a0cfd3a353761b6a0b4840372087d92bb73f7744

Download Submit
C:\Users\Admin\PO 20091827994.js

Filesize
188KB

MD5
e4a7014bfead25288d47e334a826bb70

SHA1
0ba7cb74c5339cfaf5f8043bced60b6f0e9be74f

SHA256
0508ed9357a104ac884b78d8bfe3dc7a21ac3aff689115055856452df8ea3a87

SHA512
7349bc7b6336fcd9fda695fbb2ddbbfc6353d65c1c22910878142426921673c9fe646c7e238a69c26bd177e8a0cfd3a353761b6a0b4840372087d92bb73f7744

Download Submit

Analysis

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