asyncrat | 6a3cccdcb999f02b9fcef55741fe3146cc6ee6901518d6f239296e63bf55385d

General

Target
tinhvi.exe
Size 45KB
Sample261102-pfty7sbx7q
SHA256 6a3cccdcb999f02b9fcef55741fe3146cc6ee6901518d6f239296e63bf55385d
MD5 536fd1e743536f720ff72a17803a81ea
SHA1 6a60f220ae680ecfc47a7245cf525e4b3c73f618
SHA512 c8949678d7045fe4e73a303e9baa8baad54821351d7153b997fe07f64e03f082de54bfa82f6e6787315c1661a61ab3cd8eb5909b11442081810357c53bf02551
SSDEEP 768:nuYHKTsufqG9vSLjWUvlPRmo2qb36R8aI6OPIXzjbAgX3iCyL8l3BDZ4wqDR:nuYHKTsjMvSX2m+Fb3X3bnXSZLCd4wqV
TLSH
T179231A0037E8812BF2BE4F78ADF26145867AF2673603D64E1CC451D65623FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

betsbdt.com defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

betsbdt.com

C2

betsbdt.com:443

Mutex

cmp38AwFszXU

Attributes

delay
3
install
true
install_file
GoogleUpdate.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/0x000a000000024586-10.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-1-5-21-1696934516-3600988056-1840298893-1000\Control Panel\International\Geo\Nation	tinhvi.exe

Executes dropped EXE 2 IoCs

pid	Process
1260	GoogleUpdate.exe
4312	GoogleUpdate.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
2568	cmd.exe
3192	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	tinhvi.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	GoogleUpdate.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	GoogleUpdate.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	tinhvi.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GoogleUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GoogleUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tinhvi.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	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2348	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
3760	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe
2256	tinhvi.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2256	tinhvi.exe
Token: SeDebugPrivilege	1260	GoogleUpdate.exe
Token: SeDebugPrivilege	1260	GoogleUpdate.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2568	2256	tinhvi.exe	89
PID 2256 wrote to memory of 3192	2256	tinhvi.exe	91
PID 3192 wrote to memory of 2348	3192	cmd.exe	93
PID 2568 wrote to memory of 3760	2568	cmd.exe	94
PID 3192 wrote to memory of 4312	3192	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\tinhvi.exe
"C:\Users\Admin\AppData\Local\Temp\tinhvi.exe"
1⤵
- Checks computer location settings
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2256
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "GoogleUpdate" /tr '"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2568
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "GoogleUpdate" /tr '"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3760
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8613.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3192
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2348
- - C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
    "C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4312

C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"
1⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1260

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

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp8613.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8613.tmp.bat
Size 156B
SHA256 47f83b12d5c46fc013781f3676cb53d53f51d718ce484bf258a2f5aa82905cff
MD5 26c75a19786dc6cf23753d22354ec15c
SHA1 34de39eeb74b922bee0ec195ed270480324feb0b
SHA512 5108cce1ffe41805e9d2e0b1b8e76f250c89ead794d407da0679e46a816f08b3d9dd0a87f60803d6b54d4f918c558415cdbd8d447edf8ada231fa09642d7f19d
TLSH
T1B1C08C5361C9EA1E2806A82713BA989D91A268993E45AB00830440192380898E4E9392
MD5 SHA1 SHA512 TLSH

Submit Download

GoogleUpdate.exe

Path C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
Size 45KB
SHA256 6a3cccdcb999f02b9fcef55741fe3146cc6ee6901518d6f239296e63bf55385d
MD5 536fd1e743536f720ff72a17803a81ea
SHA1 6a60f220ae680ecfc47a7245cf525e4b3c73f618
SHA512 c8949678d7045fe4e73a303e9baa8baad54821351d7153b997fe07f64e03f082de54bfa82f6e6787315c1661a61ab3cd8eb5909b11442081810357c53bf02551
SSDEEP 768:nuYHKTsufqG9vSLjWUvlPRmo2qb36R8aI6OPIXzjbAgX3iCyL8l3BDZ4wqDR:nuYHKTsjMvSX2m+Fb3X3bnXSZLCd4wqV
TLSH
T179231A0037E8812BF2BE4F78ADF26145867AF2673603D64E1CC451D65623FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2256-0-0x0000000000B90000-0x0000000000BA2000-memory.dmp

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memory/2256-1-0x0000000005730000-0x0000000005740000-memory.dmp

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memory/2256-2-0x0000000005560000-0x00000000055C6000-memory.dmp

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memory/2256-3-0x00000000059E0000-0x0000000005A7C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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