wshrat | 8506e666c372ca8121a6919a63f06846894a32c5ea3ab4b2fd73fbb631fe991e

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

Extracted

Family

wshrat

C2

http://80.76.51.33:2606

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/0x00070000000231c8-13.dat	family_wshrat
behavioral2/files/0x00090000000231d0-16.dat	family_wshrat
behavioral2/files/0x00090000000231d0-18.dat	family_wshrat

Blocklisted process makes network request 10 IoCs

flow	pid	Process
33	4976	wscript.exe
38	4976	wscript.exe
39	2620	wscript.exe
40	2620	wscript.exe
42	2620	wscript.exe
43	2620	wscript.exe
46	2620	wscript.exe
47	2620	wscript.exe
48	2620	wscript.exe
50	2620	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-1-5-21-1045988481-1457812719-2617974652-1000\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
41	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 428 set thread context of 548	428	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	86

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	33	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	38	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	39	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	40	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 428 wrote to memory of 548	428	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	86
PID 428 wrote to memory of 548	428	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	86
PID 428 wrote to memory of 548	428	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	86
PID 428 wrote to memory of 548	428	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	86
PID 428 wrote to memory of 548	428	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	86
PID 428 wrote to memory of 548	428	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	86
PID 428 wrote to memory of 548	428	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	86
PID 428 wrote to memory of 548	428	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	86
PID 548 wrote to memory of 4976	548	caspol.exe	87
PID 548 wrote to memory of 4976	548	caspol.exe	87
PID 548 wrote to memory of 4976	548	caspol.exe	87
PID 4976 wrote to memory of 2620	4976	wscript.exe	93
PID 4976 wrote to memory of 2620	4976	wscript.exe	93
PID 4976 wrote to memory of 2620	4976	wscript.exe	93

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:428
- 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:548
- - 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:4976
  - - 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:2620

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\Local\Temp\wshsdk.zip

Filesize
12.4MB

MD5
d9a63dfd8b73629421bb44bcde09f312

SHA1
7855575c12eaee0e734f3901ca1da2931e9b587a

SHA256
9d5bb028794410fda9d1b3e0f8deb6beee5bd4e1e55340bd375a209c81dc98eb

SHA512
df195c22f7818569cc92e995846ab507caa30f341ac902cc8afe6f06ae4493709e7f80357c91cf14b21e58e2154e0b35f2154d8a313bf36fcff0b72b3a539cf8

Download Submit
C:\Users\Admin\AppData\Local\Temp\wshsdk\Lib\site-packages\adodbapi\test\is64bit.py

Filesize
1KB

MD5
ca2cc8e73bbca371935bbc92ed18d567

SHA1
1adb458919e842cd78c72b1ff00e5e93cb6ef75e

SHA256
bea3f797921992fda45c19db41e10e3b325bcdd3ea35d35c1fa70535477ad9c1

SHA512
b63df3bad9272f45ba0f50e2c50aaed7a04eb1b000d5855d9f3a8e5c5f2d381c667b1e9c1e1f03f80584a7941a96992838664ae9dd25e1b8320e026da35b8223

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

Filesize
180KB

MD5
9bcc1d31eae798a11b1d50f46b1de92c

SHA1
8bc898b80ead2433ac20eaa9936d2e40ea1db01e

SHA256
cc2ca06bf02d0ba8b9ec6874b734bf6a39f84d536f6bb2d7cc5e3d577697e45b

SHA512
b0a13f056ce07f5bf1360cb9754759c499c1560ed19c684f50774d0d6f72e0669b9e10a243185d9c31555938ae2799a09222236d960fb36f935bda266b764d6d

Download Submit
memory/428-4-0x0000000005230000-0x000000000542A000-memory.dmp

Filesize
2.0MB

Download
memory/428-6-0x0000000005220000-0x0000000005230000-memory.dmp

Filesize
64KB

Download
memory/428-10-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/428-5-0x0000000002D30000-0x0000000002D3A000-memory.dmp

Filesize
40KB

Download
memory/428-1-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/428-3-0x0000000005630000-0x0000000005BD4000-memory.dmp

Filesize
5.6MB

Download
memory/428-2-0x0000000005220000-0x0000000005230000-memory.dmp

Filesize
64KB

Download
memory/428-0-0x0000000005430000-0x0000000005628000-memory.dmp

Filesize
2.0MB

Download
memory/548-7-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/548-9-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/548-14-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download

Analysis

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