wshrat | ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9

General

Target

ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe
Size

2.1MB
MD5

b6de2a88ddd8a054aa19818d7f0f7e5f
SHA1

26157de03c6c6c50b57f553a925e263064c101d1
SHA256

ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9
SHA512

9378ca26fef0fcbb0ca0ed6509a7a7673ae8c4064bd9156aa0be8d841292aa4b84a161a898abb438c73ed338503fa78f52d9703ec63a41e7dcc7066249e9b577
SSDEEP

49152:PkQTAhZM75sl9vhRFsmtkljB6chL58q/mJzhc+EbmOZt:PaLMVsPfFntkljB646q/mJmh

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 3 IoCs

resource	yara_rule
behavioral2/files/0x00080000000231eb-15.dat	family_wshrat
behavioral2/files/0x0008000000023210-18.dat	family_wshrat
behavioral2/files/0x0008000000023210-20.dat	family_wshrat

Blocklisted process makes network request 8 IoCs

flow	pid	Process
47	4704	wscript.exe
49	4704	wscript.exe
55	1736	wscript.exe
56	1736	wscript.exe
59	1736	wscript.exe
60	1736	wscript.exe
71	1736	wscript.exe
75	1736	wscript.exe

.NET Reactor proctector 2 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral2/memory/3856-2-0x0000000005210000-0x000000000543C000-memory.dmp	net_reactor
behavioral2/memory/3856-5-0x0000000004FE0000-0x000000000520A000-memory.dmp	net_reactor

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-1-5-21-1045988481-1457812719-2617974652-1000\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
58	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3856 set thread context of 4928	3856	ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe	88

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	47	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	49	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	55	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	56	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3856 wrote to memory of 4928	3856	ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe	88
PID 3856 wrote to memory of 4928	3856	ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe	88
PID 3856 wrote to memory of 4928	3856	ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe	88
PID 3856 wrote to memory of 4928	3856	ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe	88
PID 3856 wrote to memory of 4928	3856	ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe	88
PID 3856 wrote to memory of 4928	3856	ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe	88
PID 3856 wrote to memory of 4928	3856	ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe	88
PID 3856 wrote to memory of 4928	3856	ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe	88
PID 4928 wrote to memory of 4704	4928	aspnet_compiler.exe	90
PID 4928 wrote to memory of 4704	4928	aspnet_compiler.exe	90
PID 4928 wrote to memory of 4704	4928	aspnet_compiler.exe	90
PID 4704 wrote to memory of 1736	4704	wscript.exe	97
PID 4704 wrote to memory of 1736	4704	wscript.exe	97
PID 4704 wrote to memory of 1736	4704	wscript.exe	97

C:\Users\Admin\AppData\Local\Temp\ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe
"C:\Users\Admin\AppData\Local\Temp\ba1a738798423e40a68ace116d390c7aca541a4b6472c9139ab27d4af38710b9_JC.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3856
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4928
- - 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:4704
  - - 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:1736

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\Temp\vVqvy.vbs

Filesize
180KB

MD5
9bcc1d31eae798a11b1d50f46b1de92c

SHA1
8bc898b80ead2433ac20eaa9936d2e40ea1db01e

SHA256
cc2ca06bf02d0ba8b9ec6874b734bf6a39f84d536f6bb2d7cc5e3d577697e45b

SHA512
b0a13f056ce07f5bf1360cb9754759c499c1560ed19c684f50774d0d6f72e0669b9e10a243185d9c31555938ae2799a09222236d960fb36f935bda266b764d6d

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/3856-4-0x0000000005440000-0x00000000059E4000-memory.dmp

Filesize
5.6MB

Download
memory/3856-0-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download
memory/3856-5-0x0000000004FE0000-0x000000000520A000-memory.dmp

Filesize
2.2MB

Download
memory/3856-6-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download
memory/3856-7-0x0000000002B80000-0x0000000002B8A000-memory.dmp

Filesize
40KB

Download
memory/3856-8-0x0000000002B50000-0x0000000002B60000-memory.dmp

Filesize
64KB

Download
memory/3856-12-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download
memory/3856-3-0x0000000002B50000-0x0000000002B60000-memory.dmp

Filesize
64KB

Download
memory/3856-2-0x0000000005210000-0x000000000543C000-memory.dmp

Filesize
2.2MB

Download
memory/3856-1-0x0000000002B50000-0x0000000002B60000-memory.dmp

Filesize
64KB

Download
memory/4928-9-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/4928-11-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download
memory/4928-16-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download

Analysis

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