asyncrat | 756517220093a59e69e6db3de1846896d146600389f742503804f25ba6fa74dd

Analysis

max time kernel
152s
max time network
173s
platform
windows10-2004_x64
resource
win10v2004-20220331-en
submitted
04-04-2022 03:21

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General

Target

Cyup.exe
Size

377KB
MD5

723e85e9cd88b3ddaa1b44346ceeaf7d
SHA1

3da16366440b2a96dd92e583a55be819fe98191a
SHA256

756517220093a59e69e6db3de1846896d146600389f742503804f25ba6fa74dd
SHA512

328ba7a68b2fbfd44da652e7b0b7816716bcc70029739bdbae6dd803ee65e06f284bd12986caa9c72a87cbff8f835994c274bfafaa1c8ed13bc2e284ab47f1c5

Score

10^/10

asyncrat 2 persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

212.193.30.54:9524

Mutex

wyQ92!.,=FT72few

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

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/4300-126-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Cyup.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1082102374-1487407228-1886994731-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Chnzngp = "\"C:\\Users\\Admin\\AppData\\Roaming\\Tlhefchp\\Chnzngp.exe\""	Cyup.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Cyup.exe

description pid process target process

PID 448 set thread context of 4300 448 Cyup.exe MSBuild.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Cyup.exe

pid process

448 Cyup.exe
448 Cyup.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Cyup.exe

description pid process

Token: SeDebugPrivilege 448 Cyup.exe

description	pid	process	target process
PID 448 set thread context of 4300	448	Cyup.exe	MSBuild.exe

pid	process
448	Cyup.exe
448	Cyup.exe

description	pid	process
Token: SeDebugPrivilege	448	Cyup.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

Cyup.exe

description	pid	process	target process
PID 448 wrote to memory of 4300	448	Cyup.exe	MSBuild.exe
PID 448 wrote to memory of 4300	448	Cyup.exe	MSBuild.exe
PID 448 wrote to memory of 4300	448	Cyup.exe	MSBuild.exe
PID 448 wrote to memory of 4300	448	Cyup.exe	MSBuild.exe
PID 448 wrote to memory of 4300	448	Cyup.exe	MSBuild.exe
PID 448 wrote to memory of 4300	448	Cyup.exe	MSBuild.exe
PID 448 wrote to memory of 4300	448	Cyup.exe	MSBuild.exe
PID 448 wrote to memory of 4300	448	Cyup.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\Cyup.exe
"C:\Users\Admin\AppData\Local\Temp\Cyup.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:448

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
PID:4300

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/448-124-0x0000000000590000-0x00000000005F4000-memory.dmp

Filesize
400KB

Download
memory/4300-125-0x0000000000000000-mapping.dmp

Download
memory/4300-126-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download