asyncrat | 19c703ee06789d62f61493e5f3b9b7e84f35c07db55defe38c90a7261d6e8c4f

General

Target

19c703ee06789d62f61493e5f3b9b7e84f35c07db55defe38c90a7261d6e8c4f.exe
Size

223KB
MD5

15f3aee41617dba7d1f66e5d42c048bc
SHA1

63ec1da10f925c886ea4c16a02179b23e8aefc8e
SHA256

19c703ee06789d62f61493e5f3b9b7e84f35c07db55defe38c90a7261d6e8c4f
SHA512

f7ce116f29b89a0d64d45cbb96838400228646de464528532cd29dcf801e528774da7c5675aee18f295b39e494373267dfccc28ee7195e3e9a4efb2b041a3baa
SSDEEP

1536:2+iPkKjSFHBWAxEjc+aP1B4/Xg1gVHbUoKPJCvWhkFM5zym09dpvCLt+UTmk86+X:7i8bEAmjc+C1B4//AozGd0Yf5+uCdeGF

Score

10^/10

asyncrat default discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

51.161.12.215:4449

Mutex

olzlzaglbcqbb

Attributes

delay
9
install
true
install_file
svchost.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x0008000000023c83-12.dat	family_asyncrat

Checks computer location settings 2 TTPs 2 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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	cscript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	TaSSIDSS.exe

Executes dropped EXE 2 IoCs

pid	Process
1744	TaSSIDSS.exe
4580	svchost.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2916	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
1528	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
1744	TaSSIDSS.exe
4580	svchost.exe
4580	svchost.exe
4580	svchost.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1744	TaSSIDSS.exe
Token: SeDebugPrivilege	1744	TaSSIDSS.exe
Token: SeDebugPrivilege	4580	svchost.exe
Token: SeDebugPrivilege	4580	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4580	svchost.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 728 wrote to memory of 3620	728	19c703ee06789d62f61493e5f3b9b7e84f35c07db55defe38c90a7261d6e8c4f.exe	83
PID 728 wrote to memory of 3620	728	19c703ee06789d62f61493e5f3b9b7e84f35c07db55defe38c90a7261d6e8c4f.exe	83
PID 3620 wrote to memory of 1744	3620	cscript.exe	85
PID 3620 wrote to memory of 1744	3620	cscript.exe	85
PID 1744 wrote to memory of 4536	1744	TaSSIDSS.exe	86
PID 1744 wrote to memory of 4536	1744	TaSSIDSS.exe	86
PID 1744 wrote to memory of 2664	1744	TaSSIDSS.exe	88
PID 1744 wrote to memory of 2664	1744	TaSSIDSS.exe	88
PID 2664 wrote to memory of 2916	2664	cmd.exe	90
PID 2664 wrote to memory of 2916	2664	cmd.exe	90
PID 4536 wrote to memory of 1528	4536	cmd.exe	91
PID 4536 wrote to memory of 1528	4536	cmd.exe	91
PID 2664 wrote to memory of 4580	2664	cmd.exe	98
PID 2664 wrote to memory of 4580	2664	cmd.exe	98

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\19c703ee06789d62f61493e5f3b9b7e84f35c07db55defe38c90a7261d6e8c4f.exe
"C:\Users\Admin\AppData\Local\Temp\19c703ee06789d62f61493e5f3b9b7e84f35c07db55defe38c90a7261d6e8c4f.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:728
- C:\Windows\SYSTEM32\cscript.exe
  cscript //nologo "C:\Users\Admin\AppData\Local\Temp\\hZ6t4ItORkv.jse"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:3620
- - C:\Users\Admin\AppData\Local\Temp\TaSSIDSS.exe
    "C:\Users\Admin\AppData\Local\Temp\TaSSIDSS.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1744
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4536
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:1528
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBFE5.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2664
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:2916
    - - C:\Users\Admin\AppData\Roaming\svchost.exe
        
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        
        PID:4580

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

JavaScript

1

T1059.007

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

3

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
74KB

MD5
f23c5236c2569784c604586b7785cb34

SHA1
2df47f5f2f691467e855673a7be3434fb1f5d248

SHA256
8ce03b1a750fcab81bda029dab94f8e3cbd9d80296d0842e2594a0afa1d89423

SHA512
2903a69c4301623c691d969e441c47c075db758c0a985695c26bd959ca860f56fd1f4624654b4566d6ceb5eb57bbf5226f0d98d426419cbda396f59c45a2b9fb

Download Submit
C:\Users\Admin\AppData\Local\Temp\hZ6t4ItORkv.jse

Filesize
99KB

MD5
95b416f68b850d050cf2569fb6147298

SHA1
0d9524eac49239770b3e3df5872f2474da9f33f0

SHA256
af2eabc91027718f03ee41d304dcc4cfdaf2533bd1121c8e0e5e25f559e997de

SHA512
e3fc4a5785a4850d9e186815981eadaf731b02b4b5c5060aca0e09ba77c71028dbc8e57c819013e1ce14667aa5b080e94686abcccd1d3159449de05843bf6411

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBFE5.tmp.bat

Filesize
151B

MD5
e2b7222d013b6f5b4b83a30fe8d6633c

SHA1
3433155205ea53ecea9d6987aa330a80f9a8aa57

SHA256
33b670156e9626adbf191ddc329f07b5dd88d262ad51e7434e6f04b931ae5fe9

SHA512
e28ac8eaf5416b377c076a62d1123716b3b51baf7d51845dc68c9e81d5ba7116635fd302e4e4566ef1dae66d56a6458f8151f65d933bb9566378bb9731e0534e

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/728-23-0x00007FF74F830000-0x00007FF74F86A000-memory.dmp

Filesize
232KB

Download
memory/728-31-0x00007FF74F830000-0x00007FF74F86A000-memory.dmp

Filesize
232KB

Download
memory/1744-19-0x00007FF9E2023000-0x00007FF9E2025000-memory.dmp

Filesize
8KB

Download
memory/1744-20-0x0000000000340000-0x0000000000358000-memory.dmp

Filesize
96KB

Download
memory/1744-22-0x00007FF9E2020000-0x00007FF9E2AE1000-memory.dmp

Filesize
10.8MB

Download
memory/1744-24-0x00007FF9E2023000-0x00007FF9E2025000-memory.dmp

Filesize
8KB

Download
memory/1744-29-0x00007FF9E2020000-0x00007FF9E2AE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads