wshrat | a780f7dab7109dc4f3560fc5513a6629918a38cf33d58ca9947d08ece25e0d55

Analysis

max time kernel
153s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21-03-2024 04:17

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General

Target

daab7debd23282dcfff6640545a1ecd9.exe
Size

543KB
MD5

daab7debd23282dcfff6640545a1ecd9
SHA1

632152a42ad5b51852e7e658ca23f89229cef117
SHA256

a780f7dab7109dc4f3560fc5513a6629918a38cf33d58ca9947d08ece25e0d55
SHA512

d2c4260818c3c72f9ef8a8f6f1fec320db48f40ffe947561620744a2983f34eb985eb57bd460c92b99293c46f807edc94dc87664fb8720f8204ab298552073f0
SSDEEP

12288:2ZUIaUXZ2J0nOWyJbpZAi9BfkCHKj/ndlmTlSsIUucGFkPJjDjl59/HoEoBqw3Hr:2GIVi3VX3PC

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/0x00030000000227e7-5.dat	family_wshrat

Blocklisted process makes network request 7 IoCs

flow	pid	Process
25	2152	wscript.exe
28	2152	wscript.exe
59	2152	wscript.exe
115	2152	wscript.exe
154	2152	wscript.exe
214	2152	wscript.exe
257	2152	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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	daab7debd23282dcfff6640545a1ecd9.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\POpar.vbs	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\POpar.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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\POpar = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\POpar.vbs\""	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\POpar = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\POpar.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
24	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 3476 wrote to memory of 2152	3476	daab7debd23282dcfff6640545a1ecd9.exe	99
PID 3476 wrote to memory of 2152	3476	daab7debd23282dcfff6640545a1ecd9.exe	99
PID 3476 wrote to memory of 2152	3476	daab7debd23282dcfff6640545a1ecd9.exe	99

C:\Users\Admin\AppData\Local\Temp\daab7debd23282dcfff6640545a1ecd9.exe
"C:\Users\Admin\AppData\Local\Temp\daab7debd23282dcfff6640545a1ecd9.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3476
- C:\Windows\SysWOW64\wscript.exe
  "C:\Windows\System32\wscript.exe" C:\Users\Admin\AppData\Roaming\POpar.vbs
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:2152

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4076 --field-trial-handle=2900,i,14549994492153927475,12895178890800740987,262144 --variations-seed-version /prefetch:8
1⤵
PID:3656

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

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\BHC2O5WS\json[1].json

Filesize
313B

MD5
bee55e52500f967c3d9402e05dd57f65

SHA1
d8dc65ec97c6288e1fd10b8c4f8502e5a8a5bbf6

SHA256
b90eae4b05d321efc4519963349c1775dcea8e3b0ae53b50285545380b6539c0

SHA512
b8624a934fb74760f5b231ca97e89074b227ad9fe3bb08b01a81cf35760f06b346f395cf6683df5881dc429ae77af0d0a07cfeb9c9ec127e4e917191bf8c91da

Download Submit
C:\Users\Admin\AppData\Roaming\POpar.vbs

Filesize
180KB

MD5
7e72f5a9dbad69b9028c179369d4ee0d

SHA1
b4a87cbee2df0552cde19a4dd254de0752be058e

SHA256
c7a602b7907d501320577049f55a0722ff3c7fc0102b6c6ab6c4171acd9ad78e

SHA512
fb30eda8d9d19279b90118d214b14f65f965d5ca1c1a3d9f4f14c5ad952aba454ccfece287faed5b482e8d066371923ff5c4906c6dee3c210475a6debc661e6f

Download Submit
memory/3476-0-0x0000000074F00000-0x00000000756B0000-memory.dmp

Filesize
7.7MB

Download
memory/3476-1-0x0000000000AC0000-0x0000000000B4E000-memory.dmp

Filesize
568KB

Download
memory/3476-4-0x0000000074F00000-0x00000000756B0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads