vjw0rm | 172529bd741886c8380b08886e44cd7d0541e8af7c6199347d0d0cf9c479b053

Analysis

max time kernel
145s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
27/09/2022, 05:59

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General

Target
eReceipt_.js
Size 20KB
Sample220927-gpqzxacfg5
SHA256 172529bd741886c8380b08886e44cd7d0541e8af7c6199347d0d0cf9c479b053
MD5 d4f6f03ac49119235d4cb024c359c45a
SHA1 21bba1adfdd1521e5c1edadd8029e01f428fca7b
SHA512 9730301ec0098543f423c1f21e1bfa60aba68c52160baa1e8a44f2c32e0180b17b55ef2dcbe30eab79d824b5b0d42607fd4ddbd8ff2734a0e9717340be1cfc4e
SSDEEP 384:QyjtLl3T4KRe3WgZGdwhBKMrzYaG7rlTnTaE89x/s3Kq7+oMkdvILJoeNEj85kL:P1TjRoIe4xTy9x/UiJoeNEj8mL
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 22 IoCs

flow	pid	Process
4	1456	wscript.exe
5	1400	wscript.exe
13	1400	wscript.exe
19	1400	wscript.exe
26	1400	wscript.exe
28	1456	wscript.exe
32	1400	wscript.exe
35	1400	wscript.exe
36	1400	wscript.exe
37	1456	wscript.exe
40	1400	wscript.exe
41	1400	wscript.exe
42	1400	wscript.exe
43	1456	wscript.exe
45	1400	wscript.exe
46	1400	wscript.exe
47	1456	wscript.exe
48	1400	wscript.exe
49	1400	wscript.exe
50	1400	wscript.exe
51	1456	wscript.exe
52	1400	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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 3 IoCs

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\KYXNMD0WI5 = "\"C:\\Users\\Admin\\eReceipt_.js\""	wscript.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
4216	schtasks.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1400 wrote to memory of 1456	1400	wscript.exe	81
PID 1400 wrote to memory of 1456	1400	wscript.exe	81
PID 1400 wrote to memory of 4216	1400	wscript.exe	82
PID 1400 wrote to memory of 4216	1400	wscript.exe	82

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\eReceipt_.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1400
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\kpRcfMWoTf.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  PID:1456
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\eReceipt_.js
  2⤵
  - Creates scheduled task(s)
  PID:4216

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

kpRcfMWoTf.js

Path C:\Users\Admin\AppData\Roaming\kpRcfMWoTf.js
Size 6KB
SHA256 cfc3492b51d74783f9fbb320e650534ad72127acf38df3df641aa362b90b9520
MD5 237f8ecd1e444d7b5692130cfee7da0c
SHA1 80f14670d6ada78af58a3e5c0d0061b105bcd2c4
SHA512 9a255496615ee6375041e0d64d7be7793fbb189d6cb3596d3d1f71fe51c8fa478ea089829989aaace4b173cc0b69324994faca86a22041323379c75151643224
SSDEEP 96:Qu7cGwd1HoXwh1q7JPwRyHEEtyoR22r+Jh9q7BwJ5+sYjE3Bk1XgfnAiY+D4bDgk:Qu7YLIA2JkEcvXIwJ5+sEOAj85kL
MD5 SHA1 SHA512 SSDEEP

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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