asyncrat | e7000805f1f2a5957e4d5ce0acb0da3e5e9865af1eec4d57af2cb59048062ae9

General

Target
TrojanRAT.exe
Size 56KB
Sample260810-e6vnbavzd1
SHA256 e7000805f1f2a5957e4d5ce0acb0da3e5e9865af1eec4d57af2cb59048062ae9
MD5 54889815fc7ea1bc060d54bc40d4fe45
SHA1 15d98746164f372cad3996d1c69d45dddb551ed3
SHA512 b5f6e25ae83f4151c938f4677c37f04d7b349a68dd07fd389b4a9de82b49626078ec1c5bd5ab8e5b2b46974e5ac165dc116dffd0bd0babddeeabacb1d35ab00e
SSDEEP 1536:OuskdTsnb23lYJ9ebOXSXM6OMdlkejNUHLTq:OusITsnb21YJ9ebOKnrkINmq
TLSH
T1F6436C0037E9822BF17E4F78ACF22145467AF2676A03D95D1CC4518B5B13FC6DA42AFA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

cloudcomputing.in.net:443
cloudcomputing.in.net:8848
cloudcomputing.in.net:8080

Mutex

kBVPjakHQ19X

Attributes

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

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000300000001e6a5-8.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	TrojanRAT.exe

Executes dropped EXE 2 IoCs

pid	Process
3296	AsyncRat.exe
5528	AsyncRat.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
776	cmd.exe
4240	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TrojanRAT.exe
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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRat.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4828	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

pid	Process
4004	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe
5812	TrojanRAT.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5812	TrojanRAT.exe
Token: SeDebugPrivilege	3296	AsyncRat.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5812 wrote to memory of 776	5812	TrojanRAT.exe	85
PID 5812 wrote to memory of 4240	5812	TrojanRAT.exe	87
PID 4240 wrote to memory of 4828	4240	cmd.exe	89
PID 776 wrote to memory of 4004	776	cmd.exe	90
PID 4240 wrote to memory of 5528	4240	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\TrojanRAT.exe
"C:\Users\Admin\AppData\Local\Temp\TrojanRAT.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5812
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:776
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4004
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp142F.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4240
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4828
- - C:\Users\Admin\AppData\Roaming\AsyncRat.exe
    "C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5528

C:\Users\Admin\AppData\Roaming\AsyncRat.exe
"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3296

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

tmp142F.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp142F.tmp.bat
Size 152B
SHA256 f2007a745567acb019c1d4835827b32f6f0d4ac91ab85e55657726e3235d7f92
MD5 93f818a4c78c56b4b6e13880aed3df35
SHA1 f73946a65ee94f08029eae84892f99f00fc31043
SHA512 58bda515bcad7b2e493e87c4845c212db9c6302f733b378c04b4cf874c212588172be9901d0ba0caf8a30b1f59d1616b50211c48f4087a705e410017c2246b2e
TLSH
T1EEC08C42A2C9AA1E2C0D341312BA989C91666C593E44AB40C30844A91280648E4E9345
MD5 SHA1 SHA512 TLSH

Submit Download

AsyncRat.exe

Path C:\Users\Admin\AppData\Roaming\AsyncRat.exe
Size 56KB
SHA256 e7000805f1f2a5957e4d5ce0acb0da3e5e9865af1eec4d57af2cb59048062ae9
MD5 54889815fc7ea1bc060d54bc40d4fe45
SHA1 15d98746164f372cad3996d1c69d45dddb551ed3
SHA512 b5f6e25ae83f4151c938f4677c37f04d7b349a68dd07fd389b4a9de82b49626078ec1c5bd5ab8e5b2b46974e5ac165dc116dffd0bd0babddeeabacb1d35ab00e
SSDEEP 1536:OuskdTsnb23lYJ9ebOXSXM6OMdlkejNUHLTq:OusITsnb21YJ9ebOKnrkINmq
TLSH
T1F6436C0037E9822BF17E4F78ACF22145467AF2676A03D95D1CC4518B5B13FC6DA42AFA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/5812-0-0x0000000000940000-0x0000000000954000-memory.dmp

Download

memory/5812-1-0x0000000005270000-0x0000000005280000-memory.dmp

Download

memory/5812-2-0x0000000005320000-0x00000000053BC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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