asyncrat | b090d245e1cc85444c011b6b6c9c73dfa85f8e1ff5f3449d2e807552c7db6f7d

Analysis

max time kernel
145s
max time network
154s
platform
windows7_x64
resource
win7-20220414-en
submitted
01-07-2022 09:52

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

RFQ-PO#20222906.js
Size

197KB
MD5

558ced74df141e2e8f4a340edccd5e16
SHA1

09e29290df81916a3621bcde3c467b1af2228a24
SHA256

b090d245e1cc85444c011b6b6c9c73dfa85f8e1ff5f3449d2e807552c7db6f7d
SHA512

9ffc284caf3c745831b38445cfed7c664559bfb0f86348c844fc0ab4542180c7389efe61c3f0f9aeb7dbe398f7a8b147d9d0e69b3da3d9d080fea35458d4f3be

Score

10^/10

asyncrat default persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

franmhort.duia.ro:8153

Mutex

Mutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
win.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 7 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\AsyncClient.exe	asyncrat
C:\Users\Admin\AppData\Roaming\AsyncClient.exe	asyncrat
behavioral1/memory/1592-68-0x0000000001330000-0x0000000001342000-memory.dmp	asyncrat
\Users\Admin\AppData\Roaming\win.exe	asyncrat
C:\Users\Admin\AppData\Roaming\win.exe	asyncrat
C:\Users\Admin\AppData\Roaming\win.exe	asyncrat
behavioral1/memory/952-79-0x0000000001160000-0x0000000001172000-memory.dmp	asyncrat

Blocklisted process makes network request 6 IoCs

Processes:

wscript.exe

flow pid process

5 1696 wscript.exe
10 1696 wscript.exe
16 1696 wscript.exe
22 1696 wscript.exe
27 1696 wscript.exe
33 1696 wscript.exe
Executes dropped EXE 2 IoCs

Processes:

AsyncClient.exewin.exe

pid process

1592 AsyncClient.exe
952 win.exe

flow	pid	process
5	1696	wscript.exe
10	1696	wscript.exe
16	1696	wscript.exe
22	1696	wscript.exe
27	1696	wscript.exe
33	1696	wscript.exe

pid	process
1592	AsyncClient.exe
952	win.exe

Drops startup file 2 IoCs

Processes:

wscript.exewscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RFQ-PO#20222906.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RFQ-PO#20222906.js	wscript.exe

Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

108 cmd.exe

pid	process
108	cmd.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wscript.exewscript.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\RFQ-PO#20222906 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\RFQ-PO#20222906.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RFQ-PO#20222906 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\RFQ-PO#20222906.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\RFQ-PO#20222906 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\RFQ-PO#20222906.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RFQ-PO#20222906 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\RFQ-PO#20222906.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

Processes:

schtasks.exe

pid process

1060 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1284 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

AsyncClient.exe

pid process

1592 AsyncClient.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

AsyncClient.exewin.exe

description pid process

Token: SeDebugPrivilege 1592 AsyncClient.exe
Token: SeDebugPrivilege 952 win.exe

pid	process
1060	schtasks.exe

pid	process
1284	timeout.exe

pid	process
1592	AsyncClient.exe

description	pid	process
Token: SeDebugPrivilege	1592	AsyncClient.exe
Token: SeDebugPrivilege	952	win.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

wscript.exewscript.exewscript.exeAsyncClient.execmd.execmd.exe

description	pid	process	target process
PID 1280 wrote to memory of 1508	1280	wscript.exe	wscript.exe
PID 1280 wrote to memory of 1508	1280	wscript.exe	wscript.exe
PID 1280 wrote to memory of 1508	1280	wscript.exe	wscript.exe
PID 1280 wrote to memory of 1696	1280	wscript.exe	wscript.exe
PID 1280 wrote to memory of 1696	1280	wscript.exe	wscript.exe
PID 1280 wrote to memory of 1696	1280	wscript.exe	wscript.exe
PID 1696 wrote to memory of 304	1696	wscript.exe	wscript.exe
PID 1696 wrote to memory of 304	1696	wscript.exe	wscript.exe
PID 1696 wrote to memory of 304	1696	wscript.exe	wscript.exe
PID 1508 wrote to memory of 1592	1508	wscript.exe	AsyncClient.exe
PID 1508 wrote to memory of 1592	1508	wscript.exe	AsyncClient.exe
PID 1508 wrote to memory of 1592	1508	wscript.exe	AsyncClient.exe
PID 1508 wrote to memory of 1592	1508	wscript.exe	AsyncClient.exe
PID 1592 wrote to memory of 1496	1592	AsyncClient.exe	cmd.exe
PID 1592 wrote to memory of 1496	1592	AsyncClient.exe	cmd.exe
PID 1592 wrote to memory of 1496	1592	AsyncClient.exe	cmd.exe
PID 1592 wrote to memory of 1496	1592	AsyncClient.exe	cmd.exe
PID 1592 wrote to memory of 108	1592	AsyncClient.exe	cmd.exe
PID 1592 wrote to memory of 108	1592	AsyncClient.exe	cmd.exe
PID 1592 wrote to memory of 108	1592	AsyncClient.exe	cmd.exe
PID 1592 wrote to memory of 108	1592	AsyncClient.exe	cmd.exe
PID 1496 wrote to memory of 1060	1496	cmd.exe	schtasks.exe
PID 1496 wrote to memory of 1060	1496	cmd.exe	schtasks.exe
PID 1496 wrote to memory of 1060	1496	cmd.exe	schtasks.exe
PID 1496 wrote to memory of 1060	1496	cmd.exe	schtasks.exe
PID 108 wrote to memory of 1284	108	cmd.exe	timeout.exe
PID 108 wrote to memory of 1284	108	cmd.exe	timeout.exe
PID 108 wrote to memory of 1284	108	cmd.exe	timeout.exe
PID 108 wrote to memory of 1284	108	cmd.exe	timeout.exe
PID 108 wrote to memory of 952	108	cmd.exe	win.exe
PID 108 wrote to memory of 952	108	cmd.exe	win.exe
PID 108 wrote to memory of 952	108	cmd.exe	win.exe
PID 108 wrote to memory of 952	108	cmd.exe	win.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\RFQ-PO#20222906.js
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1280

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\WpkCGRDGea.js"
2⤵
- Suspicious use of WriteProcessMemory
PID:1508

C:\Users\Admin\AppData\Roaming\AsyncClient.exe
"C:\Users\Admin\AppData\Roaming\AsyncClient.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1592

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "win" /tr '"C:\Users\Admin\AppData\Roaming\win.exe"' & exit
4⤵
- Suspicious use of WriteProcessMemory
PID:1496

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "win" /tr '"C:\Users\Admin\AppData\Roaming\win.exe"'
5⤵
- Creates scheduled task(s)
PID:1060

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp18BF.tmp.bat""
4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:108

C:\Windows\SysWOW64\timeout.exe
timeout 3
5⤵
- Delays execution with timeout.exe
PID:1284

C:\Users\Admin\AppData\Roaming\win.exe
"C:\Users\Admin\AppData\Roaming\win.exe"
5⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:952

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\RFQ-PO#20222906.js"
2⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1696

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\WpkCGRDGea.js"
3⤵
PID:304

Network

MITRE ATT&CK Matrix ATT&CK 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

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp18BF.tmp.bat
Filesize
147B

MD5
259d91395cb63e1ae80b29c85f4ed3f7

SHA1
7023e796d0181a8971779604e3d94d0d540e9635

SHA256
0379bc39487944e63ffb9140e8038257ae88f6a5fdde44caec925b4a930c3d5d

SHA512
656dd65a1be595bdf1346982a1fcf65a5980f7b67188c8067f81780a0e719dfb6acdfbe35e417edae9e5d81f956280695f687f1a5b64d1797d52d0864eb5d6f8

Download Submit
C:\Users\Admin\AppData\Roaming\AsyncClient.exe
Filesize
45KB

MD5
cbdce3b5e2939fe92312004dcb31151f

SHA1
6f11f275c611decd4659f23a4593103f327806a6

SHA256
6ccc49875c2d837f462c4c3bd81f80b3be93f8435e8a22e042b5db025a31a6e3

SHA512
6240f21957016db0607987c81b110e78640d20eeba2dc0274cf6e6741cfd7924ca3b42325405e620f423157c34f355f188dbf60de96421e87f0d53e271fcc2c8

Download Submit
C:\Users\Admin\AppData\Roaming\AsyncClient.exe
Filesize
45KB

MD5
cbdce3b5e2939fe92312004dcb31151f

SHA1
6f11f275c611decd4659f23a4593103f327806a6

SHA256
6ccc49875c2d837f462c4c3bd81f80b3be93f8435e8a22e042b5db025a31a6e3

SHA512
6240f21957016db0607987c81b110e78640d20eeba2dc0274cf6e6741cfd7924ca3b42325405e620f423157c34f355f188dbf60de96421e87f0d53e271fcc2c8

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RFQ-PO#20222906.js
Filesize
197KB

MD5
558ced74df141e2e8f4a340edccd5e16

SHA1
09e29290df81916a3621bcde3c467b1af2228a24

SHA256
b090d245e1cc85444c011b6b6c9c73dfa85f8e1ff5f3449d2e807552c7db6f7d

SHA512
9ffc284caf3c745831b38445cfed7c664559bfb0f86348c844fc0ab4542180c7389efe61c3f0f9aeb7dbe398f7a8b147d9d0e69b3da3d9d080fea35458d4f3be

Download Submit
C:\Users\Admin\AppData\Roaming\RFQ-PO#20222906.js
Filesize
197KB

MD5
558ced74df141e2e8f4a340edccd5e16

SHA1
09e29290df81916a3621bcde3c467b1af2228a24

SHA256
b090d245e1cc85444c011b6b6c9c73dfa85f8e1ff5f3449d2e807552c7db6f7d

SHA512
9ffc284caf3c745831b38445cfed7c664559bfb0f86348c844fc0ab4542180c7389efe61c3f0f9aeb7dbe398f7a8b147d9d0e69b3da3d9d080fea35458d4f3be

Download Submit
C:\Users\Admin\AppData\Roaming\WpkCGRDGea.js
Filesize
90KB

MD5
18024bce1779bd2a699774f49a7ccb9e

SHA1
71d98c4b2509d40ebd128817051f8ca0271f3710

SHA256
16240be574ce82b98e9484ff2e2fcbe087f62da6f2b35eb38a67df109ee2803c

SHA512
d92c8e3b8e5b6225bd8a0f94a445fef52d012c20feccee8d4c7f3591ce6a806f83050a95780862f1acb6b18ba41a766043f9f7d1397bec0660043bb5d05696c3

Download Submit
C:\Users\Admin\AppData\Roaming\WpkCGRDGea.js
Filesize
90KB

MD5
18024bce1779bd2a699774f49a7ccb9e

SHA1
71d98c4b2509d40ebd128817051f8ca0271f3710

SHA256
16240be574ce82b98e9484ff2e2fcbe087f62da6f2b35eb38a67df109ee2803c

SHA512
d92c8e3b8e5b6225bd8a0f94a445fef52d012c20feccee8d4c7f3591ce6a806f83050a95780862f1acb6b18ba41a766043f9f7d1397bec0660043bb5d05696c3

Download Submit
C:\Users\Admin\AppData\Roaming\win.exe
Filesize
45KB

MD5
cbdce3b5e2939fe92312004dcb31151f

SHA1
6f11f275c611decd4659f23a4593103f327806a6

SHA256
6ccc49875c2d837f462c4c3bd81f80b3be93f8435e8a22e042b5db025a31a6e3

SHA512
6240f21957016db0607987c81b110e78640d20eeba2dc0274cf6e6741cfd7924ca3b42325405e620f423157c34f355f188dbf60de96421e87f0d53e271fcc2c8

Download Submit
C:\Users\Admin\AppData\Roaming\win.exe
Filesize
45KB

MD5
cbdce3b5e2939fe92312004dcb31151f

SHA1
6f11f275c611decd4659f23a4593103f327806a6

SHA256
6ccc49875c2d837f462c4c3bd81f80b3be93f8435e8a22e042b5db025a31a6e3

SHA512
6240f21957016db0607987c81b110e78640d20eeba2dc0274cf6e6741cfd7924ca3b42325405e620f423157c34f355f188dbf60de96421e87f0d53e271fcc2c8

Download Submit
\Users\Admin\AppData\Roaming\win.exe
Filesize
45KB

MD5
cbdce3b5e2939fe92312004dcb31151f

SHA1
6f11f275c611decd4659f23a4593103f327806a6

SHA256
6ccc49875c2d837f462c4c3bd81f80b3be93f8435e8a22e042b5db025a31a6e3

SHA512
6240f21957016db0607987c81b110e78640d20eeba2dc0274cf6e6741cfd7924ca3b42325405e620f423157c34f355f188dbf60de96421e87f0d53e271fcc2c8

Download Submit
memory/108-71-0x0000000000000000-mapping.dmp

Download
memory/304-61-0x0000000000000000-mapping.dmp

Download
memory/952-77-0x0000000000000000-mapping.dmp

Download
memory/952-79-0x0000000001160000-0x0000000001172000-memory.dmp

Filesize
72KB

Download
memory/1060-72-0x0000000000000000-mapping.dmp

Download
memory/1280-54-0x000007FEFC281000-0x000007FEFC283000-memory.dmp

Filesize
8KB

Download
memory/1284-74-0x0000000000000000-mapping.dmp

Download
memory/1496-70-0x0000000000000000-mapping.dmp

Download
memory/1508-55-0x0000000000000000-mapping.dmp

Download
memory/1592-69-0x0000000076181000-0x0000000076183000-memory.dmp

Filesize
8KB

Download
memory/1592-68-0x0000000001330000-0x0000000001342000-memory.dmp

Filesize
72KB

Download
memory/1592-64-0x0000000000000000-mapping.dmp

Download
memory/1696-56-0x0000000000000000-mapping.dmp

Download