asyncrat | f2451118fa6c3e2c0f09e71c60cf29021f0736c47abd236e892f33ccb2ddd98e

General

Target

THISISARAT.exe
Size

47KB
MD5

4744dae074b1b9c94c131aefa1f3827c
SHA1

927c9ae343d07004ea1a618a0ef228a26649eb92
SHA256

f2451118fa6c3e2c0f09e71c60cf29021f0736c47abd236e892f33ccb2ddd98e
SHA512

4211db34221c07b5842f6fdbfa83be11861d28ab1036224a0a8b7f695a8bf1c78422c86685cfa9cef6c503d9638d4420418c180870202c1de1766435a58c0be6
SSDEEP

768:xuETKT0k3qXWUrV6e1mo2qyI/L8CX5a15WSPImqMaHnQ0b9V6KySeZ19X6Qs2mP9:xuETKT0cE2/CL8S5C5W7mqMgn7b9WZ1Q

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

Mutex

5Lk431gyJhat

Attributes

delay
3
install
true
install_file
THISISARAT.exe
install_folder
%AppData%

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\Roaming\THISISARAT.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:

THISISARAT.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	THISISARAT.exe

Executes dropped EXE 1 IoCs

Processes:

THISISARAT.exe

pid process

4572 THISISARAT.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4572	THISISARAT.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.exeschtasks.exetimeout.exeTHISISARAT.exeTHISISARAT.execmd.exe

description	ioc	process
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	THISISARAT.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	THISISARAT.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3612 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

1692 schtasks.exe

pid	process
3612	timeout.exe

pid	process
1692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

THISISARAT.exe

pid	process
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe
1520	THISISARAT.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

THISISARAT.exeTHISISARAT.exe

description pid process

Token: SeDebugPrivilege 1520 THISISARAT.exe
Token: SeDebugPrivilege 4572 THISISARAT.exe

description	pid	process
Token: SeDebugPrivilege	1520	THISISARAT.exe
Token: SeDebugPrivilege	4572	THISISARAT.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

THISISARAT.execmd.execmd.exe

description	pid	process	target process
PID 1520 wrote to memory of 1188	1520	THISISARAT.exe	cmd.exe
PID 1520 wrote to memory of 1188	1520	THISISARAT.exe	cmd.exe
PID 1520 wrote to memory of 1188	1520	THISISARAT.exe	cmd.exe
PID 1520 wrote to memory of 2884	1520	THISISARAT.exe	cmd.exe
PID 1520 wrote to memory of 2884	1520	THISISARAT.exe	cmd.exe
PID 1520 wrote to memory of 2884	1520	THISISARAT.exe	cmd.exe
PID 1188 wrote to memory of 1692	1188	cmd.exe	schtasks.exe
PID 1188 wrote to memory of 1692	1188	cmd.exe	schtasks.exe
PID 1188 wrote to memory of 1692	1188	cmd.exe	schtasks.exe
PID 2884 wrote to memory of 3612	2884	cmd.exe	timeout.exe
PID 2884 wrote to memory of 3612	2884	cmd.exe	timeout.exe
PID 2884 wrote to memory of 3612	2884	cmd.exe	timeout.exe
PID 2884 wrote to memory of 4572	2884	cmd.exe	THISISARAT.exe
PID 2884 wrote to memory of 4572	2884	cmd.exe	THISISARAT.exe
PID 2884 wrote to memory of 4572	2884	cmd.exe	THISISARAT.exe

C:\Users\Admin\AppData\Local\Temp\THISISARAT.exe
"C:\Users\Admin\AppData\Local\Temp\THISISARAT.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1520

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "THISISARAT" /tr '"C:\Users\Admin\AppData\Roaming\THISISARAT.exe"' & exit
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1188

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "THISISARAT" /tr '"C:\Users\Admin\AppData\Roaming\THISISARAT.exe"'
3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:1692

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA901.tmp.bat""
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2884

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:3612

C:\Users\Admin\AppData\Roaming\THISISARAT.exe
"C:\Users\Admin\AppData\Roaming\THISISARAT.exe"
3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4572

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\Microsoft\CLR_v4.0_32\UsageLogs\THISISARAT.exe.log

Filesize
522B

MD5
acc9090417037dfa2a55b46ed86e32b8

SHA1
53fa6fb25fb3e88c24d2027aca6ae492b2800a4d

SHA256
2412679218bb0a7d05ceee32869bbb223619bde9966c4c460a68304a3367724b

SHA512
d51f7085ec147c708f446b9fb6923cd2fb64596d354ed929e125b30ace57c8cb3217589447a36960e5d3aea87a4e48aaa82c7509eced6d6c2cecd71fcfe3697b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA901.tmp.bat

Filesize
154B

MD5
3fa86469936106fee8f6055404a77207

SHA1
c9468a27c1d6aedc1d90ab3877e68717d48f881b

SHA256
53f828c27e6382c8bbd0f263b278e2d06c2c6da44bc42ed46d1e0ed14e1117e8

SHA512
44fca688b549e700141727cc2a50623130dcd7d7b3fa1821f3af6db47b43296992efd2da3640f30f1fbe27a5cfc07025a9b856f7cc18ac7eed25e47175e11779

Download Submit
C:\Users\Admin\AppData\Roaming\THISISARAT.exe

Filesize
47KB

MD5
4744dae074b1b9c94c131aefa1f3827c

SHA1
927c9ae343d07004ea1a618a0ef228a26649eb92

SHA256
f2451118fa6c3e2c0f09e71c60cf29021f0736c47abd236e892f33ccb2ddd98e

SHA512
4211db34221c07b5842f6fdbfa83be11861d28ab1036224a0a8b7f695a8bf1c78422c86685cfa9cef6c503d9638d4420418c180870202c1de1766435a58c0be6

Download Submit
memory/1520-0-0x00000000751EE000-0x00000000751EF000-memory.dmp

Filesize
4KB

Download
memory/1520-1-0x0000000000B10000-0x0000000000B22000-memory.dmp

Filesize
72KB

Download
memory/1520-2-0x00000000751E0000-0x0000000075990000-memory.dmp

Filesize
7.7MB

Download
memory/1520-3-0x00000000054F0000-0x000000000558C000-memory.dmp

Filesize
624KB

Download
memory/1520-8-0x00000000751E0000-0x0000000075990000-memory.dmp

Filesize
7.7MB

Download
memory/4572-14-0x0000000075130000-0x00000000758E0000-memory.dmp

Filesize
7.7MB

Download
memory/4572-15-0x0000000075130000-0x00000000758E0000-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