wshrat | a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906

General

Target

a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe
Size

2.1MB
MD5

066dbf69cbfa16c46a2142a257c95f1d
SHA1

0300eb287c3e29642877772c348c6b683b86a305
SHA256

a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906
SHA512

c1874bf3d3c6c56168eec1b18242af7562696e9c556ab7612b4c592b78b76286ce80a44cd55222df39f4e85e27cdf19b084dfd0a24127a73615f04545925da7a
SSDEEP

49152:wkQTArh5KH1JME1y9fb95r/6LGoc30b9KJp9D06dkRNLkL+mrcTuZqy:warh5s41rL6WY6SRpO+dTuZP

Score

10^/10

wshrat trojan

Malware Config

Signatures

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

WSHRAT payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000a00000002314b-20.dat	family_wshrat
behavioral2/files/0x0008000000023221-23.dat	family_wshrat

Blocklisted process makes network request 10 IoCs

flow	pid	Process
29	2996	wscript.exe
31	2996	wscript.exe
36	5104	wscript.exe
37	5104	wscript.exe
39	5104	wscript.exe
40	5104	wscript.exe
63	5104	wscript.exe
66	5104	wscript.exe
67	5104	wscript.exe
71	5104	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-1-5-21-2890696111-2332180956-3312704074-1000\Control Panel\International\Geo\Nation	wscript.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

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
38	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4384 set thread context of 3236	4384	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	89

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

System Information Discovery
T1082

Script User-Agent 4 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	36	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	37	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	29	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	31	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4384 wrote to memory of 3236	4384	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	89
PID 4384 wrote to memory of 3236	4384	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	89
PID 4384 wrote to memory of 3236	4384	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	89
PID 4384 wrote to memory of 3236	4384	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	89
PID 4384 wrote to memory of 3236	4384	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	89
PID 4384 wrote to memory of 3236	4384	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	89
PID 4384 wrote to memory of 3236	4384	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	89
PID 4384 wrote to memory of 3236	4384	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	89
PID 3236 wrote to memory of 2996	3236	caspol.exe	90
PID 3236 wrote to memory of 2996	3236	caspol.exe	90
PID 3236 wrote to memory of 2996	3236	caspol.exe	90
PID 2996 wrote to memory of 5104	2996	wscript.exe	94
PID 2996 wrote to memory of 5104	2996	wscript.exe	94
PID 2996 wrote to memory of 5104	2996	wscript.exe	94

C:\Users\Admin\AppData\Local\Temp\a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe
"C:\Users\Admin\AppData\Local\Temp\a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4384
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3236
- - C:\Windows\SysWOW64\wscript.exe
    "C:\Windows\System32\wscript.exe" "C:\Users\Admin\AppData\Roaming\vVqvy.vbs"
    3⤵
    - Blocklisted process makes network request
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:2996
  - - C:\Windows\SysWOW64\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Local\Temp\vVqvy.vbs"
      4⤵
      Blocklisted process makes network request
      PID:5104

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
323B

MD5
0c17abb0ed055fecf0c48bb6e46eb4eb

SHA1
a692730c8ec7353c31b94a888f359edb54aaa4c8

SHA256
f41e99f954e33e7b0e39930ec8620bf29801efc44275c1ee6b5cfa5e1be202c0

SHA512
645a9f2f94461d8a187261b736949df398ece5cfbf1af8653d18d3487ec1269d9f565534c1e249c12f31b3b1a41a8512953b1e991b001fc1360059e3fd494ec3

Download Submit
C:\Users\Admin\AppData\Local\Temp\vVqvy.vbs

Filesize
180KB

MD5
9bcc1d31eae798a11b1d50f46b1de92c

SHA1
8bc898b80ead2433ac20eaa9936d2e40ea1db01e

SHA256
cc2ca06bf02d0ba8b9ec6874b734bf6a39f84d536f6bb2d7cc5e3d577697e45b

SHA512
b0a13f056ce07f5bf1360cb9754759c499c1560ed19c684f50774d0d6f72e0669b9e10a243185d9c31555938ae2799a09222236d960fb36f935bda266b764d6d

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

Filesize
180KB

MD5
9bcc1d31eae798a11b1d50f46b1de92c

SHA1
8bc898b80ead2433ac20eaa9936d2e40ea1db01e

SHA256
cc2ca06bf02d0ba8b9ec6874b734bf6a39f84d536f6bb2d7cc5e3d577697e45b

SHA512
b0a13f056ce07f5bf1360cb9754759c499c1560ed19c684f50774d0d6f72e0669b9e10a243185d9c31555938ae2799a09222236d960fb36f935bda266b764d6d

Download Submit
memory/3236-13-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/3236-19-0x00000000744C0000-0x0000000074C70000-memory.dmp

Filesize
7.7MB

Download
memory/3236-15-0x00000000744C0000-0x0000000074C70000-memory.dmp

Filesize
7.7MB

Download
memory/4384-10-0x0000000005080000-0x000000000508A000-memory.dmp

Filesize
40KB

Download
memory/4384-6-0x00000000744C0000-0x0000000074C70000-memory.dmp

Filesize
7.7MB

Download
memory/4384-9-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4384-7-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4384-1-0x00000000744C0000-0x0000000074C70000-memory.dmp

Filesize
7.7MB

Download
memory/4384-11-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4384-12-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4384-8-0x00000000051E0000-0x00000000053DA000-memory.dmp

Filesize
2.0MB

Download
memory/4384-5-0x00000000055E0000-0x0000000005B84000-memory.dmp

Filesize
5.6MB

Download
memory/4384-16-0x00000000744C0000-0x0000000074C70000-memory.dmp

Filesize
7.7MB

Download
memory/4384-4-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4384-2-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4384-3-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4384-0-0x00000000053E0000-0x00000000055D8000-memory.dmp

Filesize
2.0MB

Download

Analysis

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