asyncrat | 49a6892241d69684c059d9ef6978c302a54bb6b5dfb132763987b5187731d492

General

Target

test.exe
Size

47KB
MD5

46d287e58cf33af85caf10cb86a0a4f3
SHA1

f439ffe8c890d50bd16cffbb1d579a8e3285d3b1
SHA256

49a6892241d69684c059d9ef6978c302a54bb6b5dfb132763987b5187731d492
SHA512

a0bd2f8d808706978f1cd78290210b9cdf0d3ac4751306ff292606561cdfdca8f5a65fd4008faffae05928bb5dfdd3cb3733e5a2170db77a7aacf27be814badf
SSDEEP

768:12u6ZdTvER+SWUk6P4mo2qb3S+0LzFw6PIrFE6B0bOmRdrgSNThJqZJ7tPY7yPUm:12u6ZdTv2S2MViFwDrFxWbOmRRrNTurd

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

194.44.26.124:6606

194.44.26.124:7707

194.44.26.124:8808

Mutex

YI7Q3o2wgHm8

Attributes

delay
3
install
true
install_file
svchost.exe
install_folder
%Temp%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\svchost.exe	family_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:

test.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation test.exe
Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

2464 svchost.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	test.exe

pid	process
2464	svchost.exe

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

cmd.execmd.exeschtasks.exetimeout.exesvchost.exetest.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	test.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4224 timeout.exe
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exe

pid process

640 schtasks.exe

pid	process
4224	timeout.exe

pid	process
640	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

test.exe

pid	process
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe
244	test.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

test.exesvchost.exe

description pid process

Token: SeDebugPrivilege 244 test.exe
Token: SeDebugPrivilege 2464 svchost.exe

description	pid	process
Token: SeDebugPrivilege	244	test.exe
Token: SeDebugPrivilege	2464	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

test.execmd.execmd.exe

description	pid	process	target process
PID 244 wrote to memory of 2772	244	test.exe	cmd.exe
PID 244 wrote to memory of 2772	244	test.exe	cmd.exe
PID 244 wrote to memory of 2772	244	test.exe	cmd.exe
PID 244 wrote to memory of 2440	244	test.exe	cmd.exe
PID 244 wrote to memory of 2440	244	test.exe	cmd.exe
PID 244 wrote to memory of 2440	244	test.exe	cmd.exe
PID 2440 wrote to memory of 4224	2440	cmd.exe	timeout.exe
PID 2440 wrote to memory of 4224	2440	cmd.exe	timeout.exe
PID 2772 wrote to memory of 640	2772	cmd.exe	schtasks.exe
PID 2440 wrote to memory of 4224	2440	cmd.exe	timeout.exe
PID 2772 wrote to memory of 640	2772	cmd.exe	schtasks.exe
PID 2772 wrote to memory of 640	2772	cmd.exe	schtasks.exe
PID 2440 wrote to memory of 2464	2440	cmd.exe	svchost.exe
PID 2440 wrote to memory of 2464	2440	cmd.exe	svchost.exe
PID 2440 wrote to memory of 2464	2440	cmd.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\test.exe
"C:\Users\Admin\AppData\Local\Temp\test.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:244

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Local\Temp\svchost.exe"' & exit
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2772

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Local\Temp\svchost.exe"'
3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:640

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB6EC.tmp.bat""
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2440

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:4224

C:\Users\Admin\AppData\Local\Temp\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2464

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3344

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
47KB

MD5
46d287e58cf33af85caf10cb86a0a4f3

SHA1
f439ffe8c890d50bd16cffbb1d579a8e3285d3b1

SHA256
49a6892241d69684c059d9ef6978c302a54bb6b5dfb132763987b5187731d492

SHA512
a0bd2f8d808706978f1cd78290210b9cdf0d3ac4751306ff292606561cdfdca8f5a65fd4008faffae05928bb5dfdd3cb3733e5a2170db77a7aacf27be814badf

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB6EC.tmp.bat

Filesize
154B

MD5
48f1806ed5dcb9b180d6719a6207216b

SHA1
75663e8c9a9f3fbcc79b6772f281b25a02f914f5

SHA256
f55e8466ec28dbd6ed58c93607aa23d56d9a5f2b5d0c1a7593f9c513c6bfdb92

SHA512
ef81b094b32943f66244cede91331399c47a493785a0e4e4f8ef8e9056d3c79da6fd1ddf8eb4972b1f2f4d3ef48018286912668305bf015f92b78d06c4e738af

Download Submit
memory/244-0-0x0000000074C3E000-0x0000000074C3F000-memory.dmp

Filesize
4KB

Download
memory/244-1-0x0000000000180000-0x0000000000192000-memory.dmp

Filesize
72KB

Download
memory/244-2-0x0000000074C30000-0x00000000753E0000-memory.dmp

Filesize
7.7MB

Download
memory/244-3-0x00000000049F0000-0x0000000004A56000-memory.dmp

Filesize
408KB

Download
memory/244-4-0x0000000004E90000-0x0000000004F2C000-memory.dmp

Filesize
624KB

Download
memory/244-10-0x0000000074C30000-0x00000000753E0000-memory.dmp

Filesize
7.7MB

Download
memory/2464-14-0x0000000074C30000-0x00000000753E0000-memory.dmp

Filesize
7.7MB

Download
memory/2464-15-0x0000000074C30000-0x00000000753E0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads