wshrat | a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906

General

Target

a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.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 2 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012270-25.dat	family_wshrat
behavioral1/files/0x00200000000162e2-63.dat	family_wshrat

Blocklisted process makes network request 11 IoCs

flow	pid	Process
3	2528	wscript.exe
4	2528	wscript.exe
8	2528	wscript.exe
9	744	wscript.exe
10	744	wscript.exe
13	744	wscript.exe
14	744	wscript.exe
15	744	wscript.exe
16	744	wscript.exe
17	744	wscript.exe
19	744	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
12	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 804 set thread context of 2620	804	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe	29

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

System Information Discovery
T1082

Modifies system certificate store 2 TTPs 4 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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	wscript.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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	wscript.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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	wscript.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474	wscript.exe

Script User-Agent 4 IoCs

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

description	flow	ioc
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	9	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	10	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 804 wrote to memory of 2620	804	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe	29
PID 804 wrote to memory of 2620	804	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe	29
PID 804 wrote to memory of 2620	804	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe	29
PID 804 wrote to memory of 2620	804	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe	29
PID 804 wrote to memory of 2620	804	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe	29
PID 804 wrote to memory of 2620	804	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe	29
PID 804 wrote to memory of 2620	804	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe	29
PID 804 wrote to memory of 2620	804	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe	29
PID 804 wrote to memory of 2620	804	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe	29
PID 2620 wrote to memory of 2528	2620	caspol.exe	30
PID 2620 wrote to memory of 2528	2620	caspol.exe	30
PID 2620 wrote to memory of 2528	2620	caspol.exe	30
PID 2620 wrote to memory of 2528	2620	caspol.exe	30
PID 2528 wrote to memory of 744	2528	wscript.exe	32
PID 2528 wrote to memory of 744	2528	wscript.exe	32
PID 2528 wrote to memory of 744	2528	wscript.exe	32
PID 2528 wrote to memory of 744	2528	wscript.exe	32

C:\Users\Admin\AppData\Local\Temp\a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe
"C:\Users\Admin\AppData\Local\Temp\a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906_JC.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:804
- 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:2620
- - C:\Windows\SysWOW64\wscript.exe
    "C:\Windows\System32\wscript.exe" "C:\Users\Admin\AppData\Roaming\vVqvy.vbs"
    3⤵
    - Blocklisted process makes network request
    - Suspicious use of WriteProcessMemory
    PID:2528
  - - 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
      Modifies system certificate store
      PID:744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Discovery

System Information Discovery

1

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\Cab3120.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar31EE.tmp

Filesize
163KB

MD5
9441737383d21192400eca82fda910ec

SHA1
725e0d606a4fc9ba44aa8ffde65bed15e65367e4

SHA256
bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

SHA512
7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

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\Roaming\vVqvy.vbs

Filesize
180KB

MD5
9bcc1d31eae798a11b1d50f46b1de92c

SHA1
8bc898b80ead2433ac20eaa9936d2e40ea1db01e

SHA256
cc2ca06bf02d0ba8b9ec6874b734bf6a39f84d536f6bb2d7cc5e3d577697e45b

SHA512
b0a13f056ce07f5bf1360cb9754759c499c1560ed19c684f50774d0d6f72e0669b9e10a243185d9c31555938ae2799a09222236d960fb36f935bda266b764d6d

Download Submit
memory/804-6-0x00000000006D0000-0x00000000006DA000-memory.dmp

Filesize
40KB

Download
memory/804-23-0x0000000074A50000-0x000000007513E000-memory.dmp

Filesize
6.9MB

Download
memory/804-7-0x0000000004DC0000-0x0000000004E00000-memory.dmp

Filesize
256KB

Download
memory/804-0-0x0000000074A50000-0x000000007513E000-memory.dmp

Filesize
6.9MB

Download
memory/804-2-0x0000000004DC0000-0x0000000004E00000-memory.dmp

Filesize
256KB

Download
memory/804-1-0x0000000005000000-0x00000000051F8000-memory.dmp

Filesize
2.0MB

Download
memory/804-3-0x0000000004DC0000-0x0000000004E00000-memory.dmp

Filesize
256KB

Download
memory/804-4-0x0000000004DC0000-0x0000000004E00000-memory.dmp

Filesize
256KB

Download
memory/804-5-0x0000000004E00000-0x0000000004FFA000-memory.dmp

Filesize
2.0MB

Download
memory/2620-12-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2620-21-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2620-22-0x0000000074A50000-0x000000007513E000-memory.dmp

Filesize
6.9MB

Download
memory/2620-19-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2620-17-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2620-26-0x0000000074A50000-0x000000007513E000-memory.dmp

Filesize
6.9MB

Download
memory/2620-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2620-14-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2620-10-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2620-8-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download

Analysis

Sharing