wshrat | bfffba7e6f2b39c8c465c75738d3393bffa25873f0ce255183deada13c04fe29

General

Target

bfffba7e6f2b39c8c465c75738d3393bffa25873f0ce255183deada13c04fe29.exe
Size

528KB
MD5

dcc686cb21dfa32e9de87a6d8e7456fb
SHA1

00d1b251532dcb72ac2053df95342402f5694478
SHA256

bfffba7e6f2b39c8c465c75738d3393bffa25873f0ce255183deada13c04fe29
SHA512

a39320b0c28581ac7fd37ccdd11ed00143ef421d397bde698a5cfd9955ff0ca2153a73bb69b001699db23c19cd9fd941007e9234a13ee510f67a9ccd602d24f3
SSDEEP

12288:aFqCpVo8XtPVn4LWXzm+gBuISj4ttT/SLs7jzG01s6siESyHQT58SkErYGELLyQl:8pC+b6Ewb/3

Score

10^/10

wshrat persistence trojan

Malware Config

Extracted

Family

wshrat

C2

http://45.90.222.131:7121

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/0x000800000001af6a-126.dat	family_wshrat
behavioral1/files/0x000700000001b03e-133.dat	family_wshrat

Blocklisted process makes network request 20 IoCs

flow	pid	Process
2	2924	wscript.exe
4	2924	wscript.exe
5	2924	wscript.exe
9	2924	wscript.exe
11	2924	wscript.exe
12	2924	wscript.exe
13	2924	wscript.exe
14	2924	wscript.exe
15	2924	wscript.exe
16	2924	wscript.exe
19	2924	wscript.exe
21	2924	wscript.exe
22	2924	wscript.exe
23	2924	wscript.exe
27	2924	wscript.exe
28	2924	wscript.exe
29	2924	wscript.exe
33	2924	wscript.exe
34	2924	wscript.exe
35	2924	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XcJBL.vbs	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XcJBL.vbs	wscript.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2393848421-2120571652-2495149697-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2393848421-2120571652-2495149697-1000\Software\Microsoft\Windows\CurrentVersion\Run\XcJBL = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\XcJBL.vbs\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\WOW6432Node\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\XcJBL = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\XcJBL.vbs\""	wscript.exe

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
3	ip-api.com

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

System Information Discovery
T1082

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	2	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4404 wrote to memory of 2924	4404	bfffba7e6f2b39c8c465c75738d3393bffa25873f0ce255183deada13c04fe29.exe	70
PID 4404 wrote to memory of 2924	4404	bfffba7e6f2b39c8c465c75738d3393bffa25873f0ce255183deada13c04fe29.exe	70
PID 4404 wrote to memory of 2924	4404	bfffba7e6f2b39c8c465c75738d3393bffa25873f0ce255183deada13c04fe29.exe	70

C:\Users\Admin\AppData\Local\Temp\bfffba7e6f2b39c8c465c75738d3393bffa25873f0ce255183deada13c04fe29.exe
"C:\Users\Admin\AppData\Local\Temp\bfffba7e6f2b39c8c465c75738d3393bffa25873f0ce255183deada13c04fe29.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4404
- C:\Windows\SysWOW64\wscript.exe
  "C:\Windows\System32\wscript.exe" "C:\Users\Admin\AppData\Roaming\XcJBL.vbs"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:2924

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\KFR0RUGG\json[1].json

Filesize
323B

MD5
149c2823b7eadbfb0a82388a2ab9494f

SHA1
415fe979ce5fd0064d2557a48745a3ed1a3fbf9c

SHA256
06fa5d4e7fbfb1efdc19baa034601a894b21cf729785732853ced4bb40aca869

SHA512
f8fb6b7c93c4ab37f6e250ba8ac5c82f6e17fe52156cab81d34e91107d1da716b744bfe02ee0306497a3876d5352af789a1e66dab10e11e22065bac3050475fe

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XcJBL.vbs

Filesize
180KB

MD5
c437bda2e3045d21e7300dd3bb844cbb

SHA1
89fda9b463529b2309b8e1bd859f0cdeb2a8203f

SHA256
418839201445990cb7a747fe696d8b8377dcbef9378989c639d2c5a23da3d7fa

SHA512
d3de6c2cc4093478c65fa2a889b92d9a2ea3c6cc85edb5bd3b861bde2114fec2892236a41331998ea2bf48dd4b367d84d77cc46022e6d9cf7d30e90d09edecb8

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

Filesize
180KB

MD5
c437bda2e3045d21e7300dd3bb844cbb

SHA1
89fda9b463529b2309b8e1bd859f0cdeb2a8203f

SHA256
418839201445990cb7a747fe696d8b8377dcbef9378989c639d2c5a23da3d7fa

SHA512
d3de6c2cc4093478c65fa2a889b92d9a2ea3c6cc85edb5bd3b861bde2114fec2892236a41331998ea2bf48dd4b367d84d77cc46022e6d9cf7d30e90d09edecb8

Download Submit
memory/4404-122-0x0000000000C20000-0x0000000000CAA000-memory.dmp

Filesize
552KB

Download
memory/4404-123-0x0000000074010000-0x00000000746FE000-memory.dmp

Filesize
6.9MB

Download
memory/4404-127-0x0000000074010000-0x00000000746FE000-memory.dmp

Filesize
6.9MB

Download

Analysis

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