asyncrat | 4cddaf9878b629c5ecbdf268464cae85d5f1b49597714d48f0206a831f1d086e

General

Target

gZHoNqzhnkAsyncnew.js
Size

119KB
MD5

2d39df9576b5fb59ddecd387e7bc82e6
SHA1

c80b2f2e610a61cf0ce7c71b8b52b7835b79581b
SHA256

4cddaf9878b629c5ecbdf268464cae85d5f1b49597714d48f0206a831f1d086e
SHA512

1fea7a53d13169aebd4d2430d89f363b0f234cf356a10637e7268f35f678387b4a9f9c3ab7adc84efcf640d973257e0e34baba34e9931f32fb5d935be1c28b37

Score

10^/10

asyncrat vjw0rm default persistence rat suricata trojan worm

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

104.168.33.53:6606

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat
Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
suricata: ET MALWARE Generic AsyncRAT Style SSL Cert
suricata: ET MALWARE Generic AsyncRAT Style SSL Cert
suricata
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata

Async RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Asyncnew.exe	asyncrat
C:\Users\Admin\AppData\Local\Temp\Asyncnew.exe	asyncrat
behavioral2/memory/5080-135-0x0000000000450000-0x0000000000462000-memory.dmp	asyncrat

Blocklisted process makes network request 16 IoCs

Processes:

wscript.exe

flow	pid	process
2	4740	wscript.exe
16	4740	wscript.exe
25	4740	wscript.exe
33	4740	wscript.exe
34	4740	wscript.exe
35	4740	wscript.exe
38	4740	wscript.exe
41	4740	wscript.exe
42	4740	wscript.exe
43	4740	wscript.exe
46	4740	wscript.exe
47	4740	wscript.exe
48	4740	wscript.exe
49	4740	wscript.exe
50	4740	wscript.exe
51	4740	wscript.exe

Executes dropped EXE 1 IoCs

Processes:

Asyncnew.exe

pid process

5080 Asyncnew.exe

pid	process
5080	Asyncnew.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

Processes:

wscript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	wscript.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\BObASjrxDj.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\BObASjrxDj.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
Key created	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\YVBPFHTJIQ = "\"C:\\Users\\Admin\\AppData\\Roaming\\BObASjrxDj.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
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Asyncnew.exe

description pid process

Token: SeDebugPrivilege 5080 Asyncnew.exe

description	pid	process
Token: SeDebugPrivilege	5080	Asyncnew.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 4444 wrote to memory of 4740	4444	wscript.exe	wscript.exe
PID 4444 wrote to memory of 4740	4444	wscript.exe	wscript.exe
PID 4444 wrote to memory of 5080	4444	wscript.exe	Asyncnew.exe
PID 4444 wrote to memory of 5080	4444	wscript.exe	Asyncnew.exe
PID 4444 wrote to memory of 5080	4444	wscript.exe	Asyncnew.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\gZHoNqzhnkAsyncnew.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4444

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\BObASjrxDj.js"
2⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:4740

C:\Users\Admin\AppData\Local\Temp\Asyncnew.exe
"C:\Users\Admin\AppData\Local\Temp\Asyncnew.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5080

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\Asyncnew.exe
Filesize
45KB

MD5
4133ed1d989155424a1e5805b365ce1e

SHA1
53dd535ad89b6049b2a3e57e69117f0e217c7527

SHA256
3923d390ce9e9f25b701c36cd2ad09d1a6fd9aac839ef39864bc6bc2189bf72a

SHA512
b0478b68d243d86c9400c30182a06dc0cbdb71dd0fb0914c7d216efe4e2109fdac9704b8f11f087b274b21449c72be9e0b7755bcb5b89fe04125a9682ba93bed

Download Submit
C:\Users\Admin\AppData\Local\Temp\Asyncnew.exe
Filesize
45KB

MD5
4133ed1d989155424a1e5805b365ce1e

SHA1
53dd535ad89b6049b2a3e57e69117f0e217c7527

SHA256
3923d390ce9e9f25b701c36cd2ad09d1a6fd9aac839ef39864bc6bc2189bf72a

SHA512
b0478b68d243d86c9400c30182a06dc0cbdb71dd0fb0914c7d216efe4e2109fdac9704b8f11f087b274b21449c72be9e0b7755bcb5b89fe04125a9682ba93bed

Download Submit
C:\Users\Admin\AppData\Roaming\BObASjrxDj.js
Filesize
15KB

MD5
b0bcba92509beba19a88ee124c8ae35c

SHA1
2121d8023e9f0bf447a63d665fcb85422e4dd726

SHA256
1c4bce0d3e1a6417457a4908fca49d630ffacd68339b0f537c06c8ca1dd9479a

SHA512
f6918b56a223a617696a14dab0276a408720580e04f3e6f588b190afae835cb82703b0241f3a288788430ce9246d8d005cb17db29d9996aa7fd4fc71a5f21787

Download Submit
memory/4740-130-0x0000000000000000-mapping.dmp

Download
memory/5080-132-0x0000000000000000-mapping.dmp

Download
memory/5080-135-0x0000000000450000-0x0000000000462000-memory.dmp

Filesize
72KB

Download
memory/5080-136-0x0000000005760000-0x00000000057FC000-memory.dmp

Filesize
624KB

Download
memory/5080-137-0x0000000005DB0000-0x0000000006354000-memory.dmp

Filesize
5.6MB

Download
memory/5080-138-0x0000000005870000-0x00000000058D6000-memory.dmp

Filesize
408KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads