asyncrat | 39f7b43c182fb69287831fd54fc6cc7733a22430f876416cb3a5a60c1da1faa1

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 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1152-145-0x0000000000400000-0x000000000041A000-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-1-5-21-369956170-74428499-1628131376-1000\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 3440 set thread context of 1152 3440 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 5 IoCs

Processes:

powershell.exeAttachments.exe

pid process

2924 powershell.exe
2924 powershell.exe
2924 powershell.exe
3440 Attachments.exe
3440 Attachments.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exeAttachments.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 2924 powershell.exe
Token: SeDebugPrivilege 3440 Attachments.exe
Token: SeDebugPrivilege 1152 InstallUtil.exe

description	pid	process	target process
PID 3440 set thread context of 1152	3440	Attachments.exe	InstallUtil.exe

pid	process
2924	powershell.exe
2924	powershell.exe
2924	powershell.exe
3440	Attachments.exe
3440	Attachments.exe

description	pid	process
Token: SeDebugPrivilege	2924	powershell.exe
Token: SeDebugPrivilege	3440	Attachments.exe
Token: SeDebugPrivilege	1152	InstallUtil.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

Attachments.exe

description	pid	process	target process
PID 3440 wrote to memory of 2924	3440	Attachments.exe	powershell.exe
PID 3440 wrote to memory of 2924	3440	Attachments.exe	powershell.exe
PID 3440 wrote to memory of 2924	3440	Attachments.exe	powershell.exe
PID 3440 wrote to memory of 1152	3440	Attachments.exe	InstallUtil.exe
PID 3440 wrote to memory of 1152	3440	Attachments.exe	InstallUtil.exe
PID 3440 wrote to memory of 1152	3440	Attachments.exe	InstallUtil.exe
PID 3440 wrote to memory of 1152	3440	Attachments.exe	InstallUtil.exe
PID 3440 wrote to memory of 1152	3440	Attachments.exe	InstallUtil.exe
PID 3440 wrote to memory of 1152	3440	Attachments.exe	InstallUtil.exe
PID 3440 wrote to memory of 1152	3440	Attachments.exe	InstallUtil.exe
PID 3440 wrote to memory of 1152	3440	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:3440

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:2924

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:1152

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

memory/1152-145-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1152-149-0x0000000005810000-0x0000000005D0E000-memory.dmp

Filesize
5.0MB

Download
memory/1152-148-0x0000000005270000-0x000000000530C000-memory.dmp

Filesize
624KB

Download
memory/1152-147-0x0000000004F10000-0x0000000004F1A000-memory.dmp

Filesize
40KB

Download
memory/1152-146-0x0000000004F20000-0x0000000004F21000-memory.dmp

Filesize
4KB

Download
memory/2924-136-0x000000000A270000-0x000000000A8E8000-memory.dmp

Filesize
6.5MB

Download
memory/2924-123-0x0000000008090000-0x00000000080F6000-memory.dmp

Filesize
408KB

Download
memory/2924-125-0x0000000005242000-0x0000000005243000-memory.dmp

Filesize
4KB

Download
memory/2924-126-0x0000000008350000-0x00000000086A0000-memory.dmp

Filesize
3.3MB

Download
memory/2924-127-0x0000000007A10000-0x0000000007A2C000-memory.dmp

Filesize
112KB

Download
memory/2924-128-0x00000000087A0000-0x00000000087EB000-memory.dmp

Filesize
300KB

Download
memory/2924-129-0x0000000008A70000-0x0000000008AE6000-memory.dmp

Filesize
472KB

Download
memory/2924-119-0x0000000005250000-0x0000000005286000-memory.dmp

Filesize
216KB

Download
memory/2924-137-0x0000000009760000-0x000000000977A000-memory.dmp

Filesize
104KB

Download
memory/2924-124-0x00000000082E0000-0x0000000008346000-memory.dmp

Filesize
408KB

Download
memory/2924-120-0x0000000005240000-0x0000000005241000-memory.dmp

Filesize
4KB

Download
memory/2924-121-0x0000000007A60000-0x0000000008088000-memory.dmp

Filesize
6.2MB

Download
memory/2924-122-0x0000000007870000-0x0000000007892000-memory.dmp

Filesize
136KB

Download
memory/3440-139-0x0000000005610000-0x0000000005611000-memory.dmp

Filesize
4KB

Download
memory/3440-144-0x00000000062A0000-0x00000000062EC000-memory.dmp

Filesize
304KB

Download
memory/3440-143-0x0000000006070000-0x00000000060A4000-memory.dmp

Filesize
208KB

Download
memory/3440-142-0x0000000006400000-0x00000000064B2000-memory.dmp

Filesize
712KB

Download
memory/3440-141-0x00000000062F0000-0x0000000006340000-memory.dmp

Filesize
320KB

Download
memory/3440-140-0x0000000005880000-0x00000000058C2000-memory.dmp

Filesize
264KB

Download
memory/3440-116-0x0000000000DB0000-0x0000000000DBA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads