vjw0rm | 24f26aded3fc1498cfa25636b0f53feab05bf646c8288782d7ff6d10799822b2

General

Target

PO_0018251-26931.js
Size

360KB
MD5

14d7b7944fe3f3f6d379ef011b7abcd3
SHA1

20d00db55f778ae7db48881f022b59f17ad3644e
SHA256

24f26aded3fc1498cfa25636b0f53feab05bf646c8288782d7ff6d10799822b2
SHA512

8f970656c4a6d8fc9fd9078e46d9da84a0cd888e8acb3a0a1f8efcfd5f181405da87548eda6d18c422349ac807d451b6a4e1925e6be72a98941543afb6465266

Score

10^/10

vjw0rm xloader loader persistence rat trojan worm

Malware Config

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\bin.exe	xloader
C:\Users\Admin\AppData\Local\Temp\bin.exe	xloader
behavioral2/memory/4888-141-0x0000000000170000-0x000000000019C000-memory.dmp	xloader

Blocklisted process makes network request 2 IoCs

Processes:

wscript.exe

flow pid process

4 1848 wscript.exe
9 1848 wscript.exe
Executes dropped EXE 1 IoCs

Processes:

bin.exe

pid process

2112 bin.exe

flow	pid	process
4	1848	wscript.exe
9	1848	wscript.exe

pid	process
2112	bin.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

wscript.exebin.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	wscript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	bin.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wscript.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\YVBPFHTJIQ = "\"C:\\Users\\Admin\\AppData\\Roaming\\RXUccpYQwK.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

bin.execmstp.exe

description	pid	process	target process
PID 2112 set thread context of 3116	2112	bin.exe	Explorer.EXE
PID 4888 set thread context of 3116	4888	cmstp.exe	Explorer.EXE

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

bin.execmstp.exe

pid process

2112 bin.exe
2112 bin.exe
2112 bin.exe
2112 bin.exe
4888 cmstp.exe
4888 cmstp.exe
4888 cmstp.exe
4888 cmstp.exe
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

bin.execmstp.exe

pid process

2112 bin.exe
2112 bin.exe
2112 bin.exe
4888 cmstp.exe
4888 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

bin.execmstp.exe

description pid process

Token: SeDebugPrivilege 2112 bin.exe
Token: SeDebugPrivilege 4888 cmstp.exe

pid	process
2112	bin.exe
2112	bin.exe
2112	bin.exe
2112	bin.exe
4888	cmstp.exe
4888	cmstp.exe
4888	cmstp.exe
4888	cmstp.exe

pid	process
2112	bin.exe
2112	bin.exe
2112	bin.exe
4888	cmstp.exe
4888	cmstp.exe

description	pid	process
Token: SeDebugPrivilege	2112	bin.exe
Token: SeDebugPrivilege	4888	cmstp.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

wscript.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 2508 wrote to memory of 1848	2508	wscript.exe	wscript.exe
PID 2508 wrote to memory of 1848	2508	wscript.exe	wscript.exe
PID 2508 wrote to memory of 2112	2508	wscript.exe	bin.exe
PID 2508 wrote to memory of 2112	2508	wscript.exe	bin.exe
PID 2508 wrote to memory of 2112	2508	wscript.exe	bin.exe
PID 3116 wrote to memory of 4888	3116	Explorer.EXE	cmstp.exe
PID 3116 wrote to memory of 4888	3116	Explorer.EXE	cmstp.exe
PID 3116 wrote to memory of 4888	3116	Explorer.EXE	cmstp.exe
PID 4888 wrote to memory of 3612	4888	cmstp.exe	cmd.exe
PID 4888 wrote to memory of 3612	4888	cmstp.exe	cmd.exe
PID 4888 wrote to memory of 3612	4888	cmstp.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3116

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\PO_0018251-26931.js
2⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2508

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\RXUccpYQwK.js"
3⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:1848

C:\Users\Admin\AppData\Local\Temp\bin.exe
"C:\Users\Admin\AppData\Local\Temp\bin.exe"
3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2112

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4888

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\bin.exe"
3⤵
PID:3612

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\bin.exe
Filesize
174KB

MD5
3ae87cd93196b3f86a2e1cfa3e6c9133

SHA1
64b444869181c8893d695072239bc48681ea10cd

SHA256
0a1b761095e129d76033c7bde535ca8f0517b4ddaaeda3981b5d8f998f8cf407

SHA512
1e1490502069ff5328939cc30a8e1aa74089e9cf918a27c0ce831c877035fe578811fcb970859c88437724c65383e86f055eedad4c14e3699d4270d280b865e8

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C:\Users\Admin\AppData\Local\Temp\bin.exe
Filesize
174KB

MD5
3ae87cd93196b3f86a2e1cfa3e6c9133

SHA1
64b444869181c8893d695072239bc48681ea10cd

SHA256
0a1b761095e129d76033c7bde535ca8f0517b4ddaaeda3981b5d8f998f8cf407

SHA512
1e1490502069ff5328939cc30a8e1aa74089e9cf918a27c0ce831c877035fe578811fcb970859c88437724c65383e86f055eedad4c14e3699d4270d280b865e8

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C:\Users\Admin\AppData\Roaming\RXUccpYQwK.js
Filesize
17KB

MD5
36ec5141b619fc59bebb52b2219a9bee

SHA1
f2418e89a5d8ce28ad3c73c0da1c8287948508a1

SHA256
beead3a67b89212d96e4c5a13bfbcd0414f3e0e849cac6b613e7b952361cea40

SHA512
253eb6c4e93870d32941532eee5b77f6887dd76b451d228674fe1c589b87943935d5a21198426d94d26e96ebe59249b0b48e32acfb81710bcd26265ca0a3a85d

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memory/1848-130-0x0000000000000000-mapping.dmp

Download
memory/2112-136-0x00000000010F0000-0x0000000001101000-memory.dmp

Filesize
68KB

Download
memory/2112-135-0x0000000001150000-0x000000000149A000-memory.dmp

Filesize
3.3MB

Download
memory/2112-132-0x0000000000000000-mapping.dmp

Download
memory/3116-137-0x00000000028C0000-0x0000000002A4E000-memory.dmp

Filesize
1.6MB

Download
memory/3612-139-0x0000000000000000-mapping.dmp

Download
memory/4888-138-0x0000000000000000-mapping.dmp

Download
memory/4888-141-0x0000000000170000-0x000000000019C000-memory.dmp

Filesize
176KB

Download
memory/4888-140-0x0000000000E20000-0x0000000000E36000-memory.dmp

Filesize
88KB

Download
memory/4888-142-0x0000000002400000-0x000000000274A000-memory.dmp

Filesize
3.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads