asyncrat | f7e908624a90f1442950858f52b0c2fe3b1fca71c9041612693d1c91ad4c3753

General

Target

Instaladores/evasor/extras/ejecutores/exe original/PEinstall.exe
Size

57KB
MD5

ea80d619808889ea8edb799056a67bc1
SHA1

de591d83c5e24498a294366205d0a12d2098385c
SHA256

2ebed6be66514b15e46f9b3afc93a20c9bbfb9aebba07128320b2e56c239e3d9
SHA512

d7e43ccd9a2f4f0d959d49ddc089a90da4e7e00cde0480c849d5078cf6127d5a15f4229067170399e6722a574b43f2121f9cbc8b34768b844583adacaff07929
SSDEEP

1536:KERi5rR21kXfc3dLnUAfUgc2vZnmHYUTmu1ycX9D:3RV6EpUgcTmu1ycX9D

Score

10^/10

asyncrat default defense_evasion discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:2009

Mutex

jc1XWfeoz50P

Attributes

delay
10
install
true
install_file
executor.exe
install_folder
%Temp%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000800000002420f-23.dat	family_asyncrat

Checks computer location settings 2 TTPs 2 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-1-5-21-3027557611-1484967174-339164627-1000\Control Panel\International\Geo\Nation	PEinstall.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3027557611-1484967174-339164627-1000\Control Panel\International\Geo\Nation	PEInstaller.exe

Executes dropped EXE 2 IoCs

pid	Process
2172	PEInstaller.exe
3064	executor.exe

Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010
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 6 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	PEInstaller.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	executor.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3884	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2792	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
5972	powershell.exe
5972	powershell.exe
4920	powershell.exe
4920	powershell.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe
2172	PEInstaller.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	5972	powershell.exe
Token: SeDebugPrivilege	4920	powershell.exe
Token: SeDebugPrivilege	2172	PEInstaller.exe
Token: SeDebugPrivilege	3064	executor.exe
Token: SeDebugPrivilege	3064	executor.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 5972	2988	PEinstall.exe	85
PID 2988 wrote to memory of 5972	2988	PEinstall.exe	85
PID 2988 wrote to memory of 4920	2988	PEinstall.exe	92
PID 2988 wrote to memory of 4920	2988	PEinstall.exe	92
PID 2988 wrote to memory of 2172	2988	PEinstall.exe	94
PID 2988 wrote to memory of 2172	2988	PEinstall.exe	94
PID 2988 wrote to memory of 2172	2988	PEinstall.exe	94
PID 2172 wrote to memory of 4340	2172	PEInstaller.exe	104
PID 2172 wrote to memory of 4340	2172	PEInstaller.exe	104
PID 2172 wrote to memory of 4340	2172	PEInstaller.exe	104
PID 2172 wrote to memory of 1364	2172	PEInstaller.exe	106
PID 2172 wrote to memory of 1364	2172	PEInstaller.exe	106
PID 2172 wrote to memory of 1364	2172	PEInstaller.exe	106
PID 1364 wrote to memory of 3884	1364	cmd.exe	108
PID 1364 wrote to memory of 3884	1364	cmd.exe	108
PID 1364 wrote to memory of 3884	1364	cmd.exe	108
PID 4340 wrote to memory of 2792	4340	cmd.exe	109
PID 4340 wrote to memory of 2792	4340	cmd.exe	109
PID 4340 wrote to memory of 2792	4340	cmd.exe	109
PID 1364 wrote to memory of 3064	1364	cmd.exe	110
PID 1364 wrote to memory of 3064	1364	cmd.exe	110
PID 1364 wrote to memory of 3064	1364	cmd.exe	110

C:\Users\Admin\AppData\Local\Temp\Instaladores\evasor\extras\ejecutores\exe original\PEinstall.exe
"C:\Users\Admin\AppData\Local\Temp\Instaladores\evasor\extras\ejecutores\exe original\PEinstall.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "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"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5972
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHQAbQBnACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGoAaQByACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAHYAcQBnACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGEAYQBzACMAPgA="
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4920
- C:\Users\Admin\AppData\Roaming\PEInstaller.exe
  "C:\Users\Admin\AppData\Roaming\PEInstaller.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2172
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "executor" /tr '"C:\Users\Admin\AppData\Local\Temp\executor.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4340
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "executor" /tr '"C:\Users\Admin\AppData\Local\Temp\executor.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2792
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp925D.tmp.bat""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1364
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:3884
  - - C:\Users\Admin\AppData\Local\Temp\executor.exe
      "C:\Users\Admin\AppData\Local\Temp\executor.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:3064

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Obfuscated Files or Information

1

T1027

Command Obfuscation

1

T1027.010

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
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
1KB

MD5
7d74f37c0cc75e4bba0b73f1516e1d20

SHA1
3be42abed4c70d2a6349e986f692faffa1b7af13

SHA256
80ceefcaf435ff95b3ed9e7e8ce7fa4144c3870bc0c2eaabe09c778e3827bbe1

SHA512
f63852814a1bf32e4aaa5778488b04087df5952ce85d0a0502c012c2fbab87d62c9eddbfd17f027a8627c6fa41761682f33183619a91af978ed30155cca530a9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_o2fpgv1b.4yt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp925D.tmp.bat

Filesize
155B

MD5
2724cc58e5f2c548434bd96106a38761

SHA1
becc7ff5dcd720dcef33fb39ac6a0ee17c6f37be

SHA256
6698448a86780ae8993d5bdce82b83e8ce23a773c4650a3f2f94234a9f0aef9b

SHA512
fd3f6b74a4ff35643a0f0bf8ffb7d503778f0c06e7145419682809b34ffe48e18082bdf1356bef8743e3a791c7472ec4afd6d1008ecbaa9f6964faa3de2a8bf6

Download Submit
C:\Users\Admin\AppData\Roaming\PEInstaller.exe

Filesize
48KB

MD5
a96ef57452d73871dc1045b96fddcf96

SHA1
7a9b28306b0fc32d4281b756be5bc91f53234696

SHA256
2fd4684b115a4b607493596b7fba4d54ddc7d97aec1852fbd60d449f353c2902

SHA512
14db2977907baa98fe81f66fc0b44d360bee92d8b5e53527021fd9ef5f182e3aaa30e5e05ef95b0eac3d09b21074e89dee42c59d8a23b91a3dfa0c4871c3cd8e

Download Submit
memory/2172-41-0x0000000000DA0000-0x0000000000DB2000-memory.dmp

Filesize
72KB

Download
memory/2172-47-0x0000000005B80000-0x0000000005BC0000-memory.dmp

Filesize
256KB

Download
memory/2172-46-0x0000000005BD0000-0x0000000005C6C000-memory.dmp

Filesize
624KB

Download
memory/2172-45-0x0000000005740000-0x00000000057A6000-memory.dmp

Filesize
408KB

Download
memory/2988-2-0x00007FFC48340000-0x00007FFC48E01000-memory.dmp

Filesize
10.8MB

Download
memory/2988-0-0x00007FFC48343000-0x00007FFC48345000-memory.dmp

Filesize
8KB

Download
memory/2988-1-0x0000000000A50000-0x0000000000A64000-memory.dmp

Filesize
80KB

Download
memory/2988-31-0x00007FFC48340000-0x00007FFC48E01000-memory.dmp

Filesize
10.8MB

Download
memory/5972-14-0x00007FFC48340000-0x00007FFC48E01000-memory.dmp

Filesize
10.8MB

Download
memory/5972-44-0x00007FFC48340000-0x00007FFC48E01000-memory.dmp

Filesize
10.8MB

Download
memory/5972-18-0x00007FFC48340000-0x00007FFC48E01000-memory.dmp

Filesize
10.8MB

Download
memory/5972-17-0x0000024B5F060000-0x0000024B5F162000-memory.dmp

Filesize
1.0MB

Download
memory/5972-16-0x00007FFC48340000-0x00007FFC48E01000-memory.dmp

Filesize
10.8MB

Download
memory/5972-15-0x0000024B5EC90000-0x0000024B5ECB2000-memory.dmp

Filesize
136KB

Download
memory/5972-3-0x0000024B5ECC0000-0x0000024B5ED42000-memory.dmp

Filesize
520KB

Download
memory/5972-13-0x0000024B5EC40000-0x0000024B5EC50000-memory.dmp

Filesize
64KB

Download
memory/5972-59-0x00007FFC48340000-0x00007FFC48E01000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads