asyncrat | d4767a9247ca5ae1bbc2c00f4678f58e7bd6f8a7152fd51effd15168a878a2c5

General

Target

Attachments.exe
Size

18KB
MD5

634a457966e4aebe14c44c204a4fed86
SHA1

f62dfe7c3a0db8ab50d4c858020a57503b479944
SHA256

39f7b43c182fb69287831fd54fc6cc7733a22430f876416cb3a5a60c1da1faa1
SHA512

c0da6e668e74877aab80e6acda09b683aed9145303aa6191cf52589de16d4961f9016f79acd39f932e60e06c700bbb9d5b3943f223c8316eb1a98cb6a4853ecb

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/1932-68-0x0000000000400000-0x000000000041A000-memory.dmp	asyncrat
behavioral1/memory/1932-69-0x0000000000400000-0x000000000041A000-memory.dmp	asyncrat
behavioral1/memory/1932-70-0x0000000000400000-0x000000000041A000-memory.dmp	asyncrat
behavioral1/memory/1932-71-0x0000000000400000-0x000000000041A000-memory.dmp	asyncrat

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Attachments.exe

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

Suspicious use of SetThreadContext 1 IoCs

Processes:

Attachments.exe

description pid process target process

PID 960 set thread context of 1932 960 Attachments.exe InstallUtil.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 2 IoCs

Processes:

powershell.exeAttachments.exe

pid process

1500 powershell.exe
960 Attachments.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exeAttachments.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 1500 powershell.exe
Token: SeDebugPrivilege 960 Attachments.exe
Token: SeDebugPrivilege 1932 InstallUtil.exe

description	pid	process	target process
PID 960 set thread context of 1932	960	Attachments.exe	InstallUtil.exe

pid	process
1500	powershell.exe
960	Attachments.exe

description	pid	process
Token: SeDebugPrivilege	1500	powershell.exe
Token: SeDebugPrivilege	960	Attachments.exe
Token: SeDebugPrivilege	1932	InstallUtil.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

Attachments.exe

description	pid	process	target process
PID 960 wrote to memory of 1500	960	Attachments.exe	powershell.exe
PID 960 wrote to memory of 1500	960	Attachments.exe	powershell.exe
PID 960 wrote to memory of 1500	960	Attachments.exe	powershell.exe
PID 960 wrote to memory of 1500	960	Attachments.exe	powershell.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe
PID 960 wrote to memory of 1932	960	Attachments.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\Attachments.exe
"C:\Users\Admin\AppData\Local\Temp\Attachments.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:960

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBzACAAMgAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1500

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1932

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

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
MD5
32b1478ea2ffc457d558d4eaac07bf5a

SHA1
7e1756522eb8a10e27bf86970f9096a05aee732d

SHA256
c440f9175efa17bd3777b5b47eb658d8cdd0f31ca9cd78b7dacd1ec64d0a4998

SHA512
8a6a071741fd17a2146906babccc907a4909bc8f99cab0a833f8fa25d54ef0aca39f7cad9c2888e08006f0c2776c767273e5e656ef686a5a7f6f76442ddfab30

Download Submit
memory/960-64-0x00000000046F0000-0x0000000004724000-memory.dmp

Filesize
208KB

Download
memory/960-55-0x0000000075D11000-0x0000000075D13000-memory.dmp

Filesize
8KB

Download
memory/960-65-0x0000000004940000-0x000000000498C000-memory.dmp

Filesize
304KB

Download
memory/960-54-0x0000000000E90000-0x0000000000E9A000-memory.dmp

Filesize
40KB

Download
memory/960-62-0x0000000004880000-0x0000000004881000-memory.dmp

Filesize
4KB

Download
memory/960-63-0x0000000004820000-0x0000000004862000-memory.dmp

Filesize
264KB

Download
memory/1500-61-0x0000000001D82000-0x0000000001D84000-memory.dmp

Filesize
8KB

Download
memory/1500-60-0x0000000001D81000-0x0000000001D82000-memory.dmp

Filesize
4KB

Download
memory/1500-59-0x0000000001D80000-0x0000000001D81000-memory.dmp

Filesize
4KB

Download
memory/1932-66-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1932-67-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1932-68-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1932-69-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1932-70-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1932-71-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1932-73-0x0000000004AF0000-0x0000000004AF1000-memory.dmp

Filesize
4KB

Download
memory/1932-75-0x0000000000440000-0x000000000044A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads