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
behavioral1/files/0x000700000001b02c-16.dat	family_wshrat
behavioral1/files/0x000700000001b02f-19.dat	family_wshrat

Blocklisted process makes network request 28 IoCs

flow	pid	Process
2	420	wscript.exe
3	420	wscript.exe
5	1056	wscript.exe
8	1056	wscript.exe
10	1056	wscript.exe
11	1056	wscript.exe
13	1056	wscript.exe
15	1056	wscript.exe
16	1056	wscript.exe
17	1056	wscript.exe
18	1056	wscript.exe
19	1056	wscript.exe
20	1056	wscript.exe
21	1056	wscript.exe
22	1056	wscript.exe
23	1056	wscript.exe
27	1056	wscript.exe
28	1056	wscript.exe
29	1056	wscript.exe
30	1056	wscript.exe
31	1056	wscript.exe
32	1056	wscript.exe
33	1056	wscript.exe
34	1056	wscript.exe
42	1056	wscript.exe
43	1056	wscript.exe
44	1056	wscript.exe
45	1056	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
9	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4280 set thread context of 852	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	72

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	8	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	2	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe
4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe
4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe
4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4280 wrote to memory of 1396	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	70
PID 4280 wrote to memory of 1396	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	70
PID 4280 wrote to memory of 1396	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	70
PID 4280 wrote to memory of 3756	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	71
PID 4280 wrote to memory of 3756	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	71
PID 4280 wrote to memory of 3756	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	71
PID 4280 wrote to memory of 852	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	72
PID 4280 wrote to memory of 852	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	72
PID 4280 wrote to memory of 852	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	72
PID 4280 wrote to memory of 852	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	72
PID 4280 wrote to memory of 852	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	72
PID 4280 wrote to memory of 852	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	72
PID 4280 wrote to memory of 852	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	72
PID 4280 wrote to memory of 852	4280	a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe	72
PID 852 wrote to memory of 420	852	caspol.exe	73
PID 852 wrote to memory of 420	852	caspol.exe	73
PID 852 wrote to memory of 420	852	caspol.exe	73
PID 420 wrote to memory of 1056	420	wscript.exe	75
PID 420 wrote to memory of 1056	420	wscript.exe	75
PID 420 wrote to memory of 1056	420	wscript.exe	75

C:\Users\Admin\AppData\Local\Temp\a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe
"C:\Users\Admin\AppData\Local\Temp\a075c57c5e9ab478af53bbfa19faf2fecb404abd0d1ba953e84d347d5093f906.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4280
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
  2⤵
  PID:1396
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
  2⤵
  PID:3756
- 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:852
- - 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:420
  - - 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:1056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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\Microsoft\Windows\INetCache\IE\9TVXN1W7\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/852-9-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/852-15-0x00000000736D0000-0x0000000073DBE000-memory.dmp

Filesize
6.9MB

Download
memory/852-12-0x00000000736D0000-0x0000000073DBE000-memory.dmp

Filesize
6.9MB

Download
memory/4280-5-0x00000000051C0000-0x00000000051D0000-memory.dmp

Filesize
64KB

Download
memory/4280-7-0x0000000002B20000-0x0000000002B2A000-memory.dmp

Filesize
40KB

Download
memory/4280-8-0x00000000051C0000-0x00000000051D0000-memory.dmp

Filesize
64KB

Download
memory/4280-6-0x00000000051D0000-0x00000000053CA000-memory.dmp

Filesize
2.0MB

Download
memory/4280-11-0x00000000736D0000-0x0000000073DBE000-memory.dmp

Filesize
6.9MB

Download
memory/4280-3-0x00000000051C0000-0x00000000051D0000-memory.dmp

Filesize
64KB

Download
memory/4280-1-0x00000000053D0000-0x00000000055C8000-memory.dmp

Filesize
2.0MB

Download
memory/4280-4-0x00000000055D0000-0x0000000005ACE000-memory.dmp

Filesize
5.0MB

Download
memory/4280-2-0x00000000051C0000-0x00000000051D0000-memory.dmp

Filesize
64KB

Download
memory/4280-0-0x00000000736D0000-0x0000000073DBE000-memory.dmp

Filesize
6.9MB

Download

Analysis

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