asyncrat | a7999bf95618f2e2c37c5d0e805f8ff4fa44d2254e0ee0175df630f386a0c979

General

Target

1dfb8f4b408ad8a763e4655e90c07093.exe
Size

668KB
MD5

1dfb8f4b408ad8a763e4655e90c07093
SHA1

be332a245adcd81707dd3de6b60653e2f68a0256
SHA256

a7999bf95618f2e2c37c5d0e805f8ff4fa44d2254e0ee0175df630f386a0c979
SHA512

a7af9a29cc5942ca67473f0f25f919bd22b6510b8f9738121dbac2f248dcfdbadc086097c120e00bba3df1fd08f7881d54fa3ec0a3775a0ab01219aa5991f9df

Score

10^/10

asyncrat 1 persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

1

C2

212.193.30.54:8755

Mutex

gyQ12!.,=FD7trew

Attributes

anti_vm
false
bsod
false
delay
3
install
false
install_folder
%AppData%
pastebin_config
null

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/2796-134-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

1dfb8f4b408ad8a763e4655e90c07093.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	1dfb8f4b408ad8a763e4655e90c07093.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

1dfb8f4b408ad8a763e4655e90c07093.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Xhdgkfv = "\"C:\\Users\\Admin\\AppData\\Roaming\\Wdnzjeuy\\Xhdgkfv.exe\""	1dfb8f4b408ad8a763e4655e90c07093.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

1dfb8f4b408ad8a763e4655e90c07093.exe

description pid process target process

PID 1636 set thread context of 2796 1636 1dfb8f4b408ad8a763e4655e90c07093.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 1 IoCs
evasion

Processes:

timeout.exe

pid process

3264 timeout.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

1dfb8f4b408ad8a763e4655e90c07093.exe

pid process

1636 1dfb8f4b408ad8a763e4655e90c07093.exe
1636 1dfb8f4b408ad8a763e4655e90c07093.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

1dfb8f4b408ad8a763e4655e90c07093.exe

description pid process

Token: SeDebugPrivilege 1636 1dfb8f4b408ad8a763e4655e90c07093.exe

description	pid	process	target process
PID 1636 set thread context of 2796	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	MSBuild.exe

pid	process
3264	timeout.exe

pid	process
1636	1dfb8f4b408ad8a763e4655e90c07093.exe
1636	1dfb8f4b408ad8a763e4655e90c07093.exe

description	pid	process
Token: SeDebugPrivilege	1636	1dfb8f4b408ad8a763e4655e90c07093.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

1dfb8f4b408ad8a763e4655e90c07093.execmd.exe

description	pid	process	target process
PID 1636 wrote to memory of 444	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	cmd.exe
PID 1636 wrote to memory of 444	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	cmd.exe
PID 1636 wrote to memory of 444	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	cmd.exe
PID 444 wrote to memory of 3264	444	cmd.exe	timeout.exe
PID 444 wrote to memory of 3264	444	cmd.exe	timeout.exe
PID 444 wrote to memory of 3264	444	cmd.exe	timeout.exe
PID 1636 wrote to memory of 2796	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	MSBuild.exe
PID 1636 wrote to memory of 2796	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	MSBuild.exe
PID 1636 wrote to memory of 2796	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	MSBuild.exe
PID 1636 wrote to memory of 2796	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	MSBuild.exe
PID 1636 wrote to memory of 2796	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	MSBuild.exe
PID 1636 wrote to memory of 2796	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	MSBuild.exe
PID 1636 wrote to memory of 2796	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	MSBuild.exe
PID 1636 wrote to memory of 2796	1636	1dfb8f4b408ad8a763e4655e90c07093.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\1dfb8f4b408ad8a763e4655e90c07093.exe
"C:\Users\Admin\AppData\Local\Temp\1dfb8f4b408ad8a763e4655e90c07093.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1636

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 20
2⤵
- Suspicious use of WriteProcessMemory
PID:444

C:\Windows\SysWOW64\timeout.exe
timeout 20
3⤵
- Delays execution with timeout.exe
PID:3264

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
PID:2796

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1636-130-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/1636-131-0x0000000000D00000-0x0000000000DAE000-memory.dmp

Filesize
696KB

Download
memory/1636-132-0x0000000005730000-0x0000000005731000-memory.dmp

Filesize
4KB

Download
memory/1636-133-0x0000000001620000-0x00000000016B2000-memory.dmp

Filesize
584KB

Download
memory/2796-134-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2796-135-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/2796-136-0x0000000004D70000-0x0000000004D71000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads