asyncrat | a0255bd8a15446c39c4c32dceab9116c541583938022f13d3846012b9ee4c65f

General

Target

SKM-210221.exe
Size

17KB
MD5

5da85385325f5290a7fae0141809a615
SHA1

0e8d69936b68f66f5cf795b3318b0c13d62c54ac
SHA256

a0255bd8a15446c39c4c32dceab9116c541583938022f13d3846012b9ee4c65f
SHA512

e76b802796a29de2600aa4e8f1fad73945a624d0d8289af9c20e3c1cd2f6b475b4fc99989e29c4b7f8da0652e36b61b3de4811fa9491fa4d89e633bab36d6cce

Score

10^/10

asyncrat persistence rat

Malware Config

Signatures

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

Async RAT payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1544-62-0x0000000000400000-0x000000000041A000-memory.dmp	asyncrat
behavioral1/memory/1544-63-0x0000000000400000-0x000000000041A000-memory.dmp	asyncrat
behavioral1/memory/1544-64-0x0000000000400000-0x000000000041A000-memory.dmp	asyncrat
behavioral1/memory/1544-65-0x0000000000400000-0x000000000041A000-memory.dmp	asyncrat

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

SKM-210221.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\Chrome = "\"C:\\Users\\Admin\\AppData\\Roaming\\Demo\\Chrome.exe\""	SKM-210221.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

SKM-210221.exe

description pid process target process

PID 1692 set thread context of 1544 1692 SKM-210221.exe MSBuild.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Delays execution with timeout.exe 2 IoCs
evasion

Processes:

timeout.exetimeout.exe

pid process

472 timeout.exe
636 timeout.exe

description	pid	process	target process
PID 1692 set thread context of 1544	1692	SKM-210221.exe	MSBuild.exe

pid	process
472	timeout.exe
636	timeout.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

Processes:

SKM-210221.exe

pid	process
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe
1692	SKM-210221.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

SKM-210221.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 1692 SKM-210221.exe
Token: SeDebugPrivilege 1544 MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	1692	SKM-210221.exe
Token: SeDebugPrivilege	1544	MSBuild.exe

Suspicious use of WriteProcessMemory 49 IoCs

Processes:

SKM-210221.execmd.execmd.exe

description	pid	process	target process
PID 1692 wrote to memory of 1112	1692	SKM-210221.exe	cmd.exe
PID 1692 wrote to memory of 1112	1692	SKM-210221.exe	cmd.exe
PID 1692 wrote to memory of 1112	1692	SKM-210221.exe	cmd.exe
PID 1692 wrote to memory of 1112	1692	SKM-210221.exe	cmd.exe
PID 1112 wrote to memory of 472	1112	cmd.exe	timeout.exe
PID 1112 wrote to memory of 472	1112	cmd.exe	timeout.exe
PID 1112 wrote to memory of 472	1112	cmd.exe	timeout.exe
PID 1112 wrote to memory of 472	1112	cmd.exe	timeout.exe
PID 1692 wrote to memory of 1352	1692	SKM-210221.exe	cmd.exe
PID 1692 wrote to memory of 1352	1692	SKM-210221.exe	cmd.exe
PID 1692 wrote to memory of 1352	1692	SKM-210221.exe	cmd.exe
PID 1692 wrote to memory of 1352	1692	SKM-210221.exe	cmd.exe
PID 1352 wrote to memory of 636	1352	cmd.exe	timeout.exe
PID 1352 wrote to memory of 636	1352	cmd.exe	timeout.exe
PID 1352 wrote to memory of 636	1352	cmd.exe	timeout.exe
PID 1352 wrote to memory of 636	1352	cmd.exe	timeout.exe
PID 1692 wrote to memory of 1144	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1144	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1144	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1144	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1164	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1164	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1164	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1164	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1804	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1804	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1804	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1804	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1048	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1048	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1048	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1048	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1628	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1628	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1628	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1628	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 968	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 968	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 968	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 968	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1544	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1544	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1544	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1544	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1544	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1544	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1544	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1544	1692	SKM-210221.exe	MSBuild.exe
PID 1692 wrote to memory of 1544	1692	SKM-210221.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\SKM-210221.exe
"C:\Users\Admin\AppData\Local\Temp\SKM-210221.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1692

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C timeout 10
2⤵
- Suspicious use of WriteProcessMemory
PID:1112

C:\Windows\SysWOW64\timeout.exe
timeout 10
3⤵
- Delays execution with timeout.exe
PID:472

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C timeout 10
2⤵
- Suspicious use of WriteProcessMemory
PID:1352

C:\Windows\SysWOW64\timeout.exe
timeout 10
3⤵
- Delays execution with timeout.exe
PID:636

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
PID:1144

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
PID:1164

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
PID:1804

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
PID:1048

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
PID:1628

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
PID:968

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1544

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
MD5
170dd2268c32df235553da902504624e

SHA1
eb90ee039bfda8c76b2b8e9b50625f79fa986757

SHA256
816712d74618373bb1a952191c36c15cfc8c56860ebf66e540787dc98cd5ec0b

SHA512
db821a1fd37bee78957033e2b00528c1b941a1d87bba01baf25704571e641aabce3ba5777aabdf914eb99282f1d65933b8b69835807904a33f0492b52f8873d0

Download Submit
memory/1544-63-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1544-65-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1544-69-0x0000000000480000-0x000000000048A000-memory.dmp

Filesize
40KB

Download
memory/1544-67-0x0000000002130000-0x0000000002131000-memory.dmp

Filesize
4KB

Download
memory/1544-64-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1544-61-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1544-62-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1544-60-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1692-54-0x00000000001C0000-0x00000000001CA000-memory.dmp

Filesize
40KB

Download
memory/1692-59-0x0000000005000000-0x000000000504C000-memory.dmp

Filesize
304KB

Download
memory/1692-56-0x0000000005630000-0x0000000005631000-memory.dmp

Filesize
4KB

Download
memory/1692-58-0x00000000040B0000-0x00000000040E4000-memory.dmp

Filesize
208KB

Download
memory/1692-55-0x0000000075D61000-0x0000000075D63000-memory.dmp

Filesize
8KB

Download
memory/1692-57-0x0000000000610000-0x000000000065C000-memory.dmp

Filesize
304KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads