asyncrat | aafd84bfc4bfd841eee42e253df9df9868a4fc7a90474a9200940d9b6cbc35fa

General

Target

tmp.exe
Size

5.3MB
MD5

6967092864e12d1bec4bdda56399ae44
SHA1

78458ea4a39f59869a131c1eff19f383bb8955f4
SHA256

aafd84bfc4bfd841eee42e253df9df9868a4fc7a90474a9200940d9b6cbc35fa
SHA512

34270c2c716e8ee6907ec48d92aea0fa5a88cd79343b3b3fe7eb4b00068445bb7f9d640f4aed166ade9bb63cc562467c53af5f188081953a5772463a7ce258fb
SSDEEP

98304:pgG+mM6eVLwvCuTjZMyOgEdMD/cKr8njPFUxILCnrpP:h+AeVLwv5ayOZdA0K4nxUx+Y

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

months-documents.at.ply.gg:10134

months-documents.at.ply.gg:39185

Mutex

杰Θio开ي9fd6比kVΒيmGΙ6Kz0h

Attributes

delay
1
install
true
install_file
RuntimeBroker.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 9 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/676-132-0x0000000000430000-0x0000000001CF0000-memory.dmp	asyncrat
behavioral2/memory/676-134-0x0000000000430000-0x0000000001CF0000-memory.dmp	asyncrat
behavioral2/memory/676-140-0x0000000000430000-0x0000000001CF0000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe	asyncrat
C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe	asyncrat
behavioral2/memory/4904-144-0x0000000000750000-0x0000000002010000-memory.dmp	asyncrat
behavioral2/memory/4904-145-0x0000000000750000-0x0000000002010000-memory.dmp	asyncrat
behavioral2/memory/4904-147-0x0000000000750000-0x0000000002010000-memory.dmp	asyncrat
behavioral2/memory/4904-151-0x0000000000750000-0x0000000002010000-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:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation tmp.exe
Executes dropped EXE 1 IoCs

Processes:

RuntimeBroker.exe

pid process

4904 RuntimeBroker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	tmp.exe

pid	process
4904	RuntimeBroker.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 19 IoCs

Processes:

tmp.exeRuntimeBroker.exe

pid	process
676	tmp.exe
676	tmp.exe
676	tmp.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe
4904	RuntimeBroker.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

2112 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2024 timeout.exe

pid	process
2112	schtasks.exe

pid	process
2024	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

tmp.exe

pid	process
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe
676	tmp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exeRuntimeBroker.exe

description pid process

Token: SeDebugPrivilege 676 tmp.exe
Token: SeDebugPrivilege 4904 RuntimeBroker.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

tmp.exeRuntimeBroker.exe

pid process

676 tmp.exe
4904 RuntimeBroker.exe

description	pid	process
Token: SeDebugPrivilege	676	tmp.exe
Token: SeDebugPrivilege	4904	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

tmp.execmd.execmd.exe

description	pid	process	target process
PID 676 wrote to memory of 4092	676	tmp.exe	cmd.exe
PID 676 wrote to memory of 4092	676	tmp.exe	cmd.exe
PID 676 wrote to memory of 4092	676	tmp.exe	cmd.exe
PID 676 wrote to memory of 4712	676	tmp.exe	cmd.exe
PID 676 wrote to memory of 4712	676	tmp.exe	cmd.exe
PID 676 wrote to memory of 4712	676	tmp.exe	cmd.exe
PID 4092 wrote to memory of 2112	4092	cmd.exe	schtasks.exe
PID 4092 wrote to memory of 2112	4092	cmd.exe	schtasks.exe
PID 4092 wrote to memory of 2112	4092	cmd.exe	schtasks.exe
PID 4712 wrote to memory of 2024	4712	cmd.exe	timeout.exe
PID 4712 wrote to memory of 2024	4712	cmd.exe	timeout.exe
PID 4712 wrote to memory of 2024	4712	cmd.exe	timeout.exe
PID 4712 wrote to memory of 4904	4712	cmd.exe	RuntimeBroker.exe
PID 4712 wrote to memory of 4904	4712	cmd.exe	RuntimeBroker.exe
PID 4712 wrote to memory of 4904	4712	cmd.exe	RuntimeBroker.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Checks computer location settings
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:676

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroker" /tr '"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:4092

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroker" /tr '"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"'
3⤵
- Creates scheduled task(s)
PID:2112

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB1B1.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:4712

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:2024

C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
3⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4904

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

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\Local\Temp\tmpB1B1.tmp.bat
Filesize
157B

MD5
81e63d444c1ba8402436f30c6c43b478

SHA1
48d1819bd84a78c27bc4e10eb2681a996e5b664c

SHA256
5111f558533adb9629d0bcb95248f4a34c5f37b8aba775a0ac07f765c6ba2204

SHA512
e6a52503fbd9b69647a363270ea070086e10fb15d0363d582506f6c545b73f6996064f5307b2d6d8efcfd05b581a80399ffdcbbc1059e93b0d8f0c110a5ac46f

Download Submit
C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
Filesize
5.3MB

MD5
6967092864e12d1bec4bdda56399ae44

SHA1
78458ea4a39f59869a131c1eff19f383bb8955f4

SHA256
aafd84bfc4bfd841eee42e253df9df9868a4fc7a90474a9200940d9b6cbc35fa

SHA512
34270c2c716e8ee6907ec48d92aea0fa5a88cd79343b3b3fe7eb4b00068445bb7f9d640f4aed166ade9bb63cc562467c53af5f188081953a5772463a7ce258fb

Download Submit
C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
Filesize
5.3MB

MD5
6967092864e12d1bec4bdda56399ae44

SHA1
78458ea4a39f59869a131c1eff19f383bb8955f4

SHA256
aafd84bfc4bfd841eee42e253df9df9868a4fc7a90474a9200940d9b6cbc35fa

SHA512
34270c2c716e8ee6907ec48d92aea0fa5a88cd79343b3b3fe7eb4b00068445bb7f9d640f4aed166ade9bb63cc562467c53af5f188081953a5772463a7ce258fb

Download Submit
memory/676-140-0x0000000000430000-0x0000000001CF0000-memory.dmp

Filesize
24.8MB

Download
memory/676-133-0x000000007F8D0000-0x000000007FCA1000-memory.dmp

Filesize
3.8MB

Download
memory/676-134-0x0000000000430000-0x0000000001CF0000-memory.dmp

Filesize
24.8MB

Download
memory/676-132-0x0000000000430000-0x0000000001CF0000-memory.dmp

Filesize
24.8MB

Download
memory/2024-139-0x0000000000000000-mapping.dmp

Download
memory/2112-137-0x0000000000000000-mapping.dmp

Download
memory/4092-135-0x0000000000000000-mapping.dmp

Download
memory/4712-136-0x0000000000000000-mapping.dmp

Download
memory/4904-147-0x0000000000750000-0x0000000002010000-memory.dmp

Filesize
24.8MB

Download
memory/4904-144-0x0000000000750000-0x0000000002010000-memory.dmp

Filesize
24.8MB

Download
memory/4904-145-0x0000000000750000-0x0000000002010000-memory.dmp

Filesize
24.8MB

Download
memory/4904-146-0x000000007F630000-0x000000007FA01000-memory.dmp

Filesize
3.8MB

Download
memory/4904-141-0x0000000000000000-mapping.dmp

Download
memory/4904-148-0x000000000ADE0000-0x000000000AE7C000-memory.dmp

Filesize
624KB

Download
memory/4904-149-0x000000000B430000-0x000000000B9D4000-memory.dmp

Filesize
5.6MB

Download
memory/4904-150-0x000000000AE80000-0x000000000AEE6000-memory.dmp

Filesize
408KB

Download
memory/4904-151-0x0000000000750000-0x0000000002010000-memory.dmp

Filesize
24.8MB

Download
memory/4904-152-0x000000000C620000-0x000000000C696000-memory.dmp

Filesize
472KB

Download
memory/4904-153-0x000000000C600000-0x000000000C61E000-memory.dmp

Filesize
120KB

Download
memory/4904-154-0x000000000C830000-0x000000000C8C2000-memory.dmp

Filesize
584KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads