asyncrat | dc0ac276ec83d53e1c05b0f88a47515871f19df0686530258d6ce7184b0596c5

General

Target

cnchecker4.exe
Size

6.8MB
MD5

0c49a3be203b3c6394e67fa131e3c300
SHA1

cafa1d4725e078ec7ea78a108b49593d6c29198d
SHA256

dc0ac276ec83d53e1c05b0f88a47515871f19df0686530258d6ce7184b0596c5
SHA512

b664c9ac541aadce54140e7da2c58ae940571501fedb9ea67f48cbfec12873547ea5e9b75b9204553c068fb9de8164eaebdab4083e6594ef31bd34f3ecda79b8
SSDEEP

98304:IwgyO11Iy1eydWy7HSENCW5VVJW6M87w:INPIy1ey1Nzs

Score

10^/10

asyncrat stormkitty default discovery persistence privilege_escalation rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot7289188591:AAFXBqcWy9p_LgUKTwd-Pcl7lvzedUGWL1E/sendMessage?chat_id=8079461533

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
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
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\SVCHOST.EXE	family_stormkitty
behavioral2/memory/2248-20-0x00000000007A0000-0x00000000007E0000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\SVCHOST.EXE	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

Processes:

SVCHOST.EXEcnchecker4.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	SVCHOST.EXE
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	cnchecker4.exe

Executes dropped EXE 2 IoCs

Processes:

CNCHECKER3.EXESVCHOST.EXE

pid process

3116 CNCHECKER3.EXE
2248 SVCHOST.EXE
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

pid	process
3116	CNCHECKER3.EXE
2248	SVCHOST.EXE

Drops desktop.ini file(s) 8 IoCs

Processes:

SVCHOST.EXE

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Local\06ebb5b204e4f092eebc290fddc8d0c2\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	SVCHOST.EXE
File created	C:\Users\Admin\AppData\Local\06ebb5b204e4f092eebc290fddc8d0c2\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	SVCHOST.EXE
File created	C:\Users\Admin\AppData\Local\06ebb5b204e4f092eebc290fddc8d0c2\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	SVCHOST.EXE
File created	C:\Users\Admin\AppData\Local\06ebb5b204e4f092eebc290fddc8d0c2\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	SVCHOST.EXE
File created	C:\Users\Admin\AppData\Local\06ebb5b204e4f092eebc290fddc8d0c2\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	SVCHOST.EXE
File created	C:\Users\Admin\AppData\Local\06ebb5b204e4f092eebc290fddc8d0c2\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	SVCHOST.EXE
File opened for modification	C:\Users\Admin\AppData\Local\06ebb5b204e4f092eebc290fddc8d0c2\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	SVCHOST.EXE
File created	C:\Users\Admin\AppData\Local\06ebb5b204e4f092eebc290fddc8d0c2\Admin@UTKBEBLO_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	SVCHOST.EXE

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

20 icanhazip.com
Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.
Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
20	icanhazip.com

Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

Processes:

netsh.exenetsh.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 10 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:

chcp.comchcp.comnetsh.execnchecker4.exeSVCHOST.EXEcmd.exeschtasks.exefindstr.exenetsh.execmd.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cnchecker4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SVCHOST.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	findstr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 2 IoCs
Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.
discovery

Wi-Fi Discovery
T1016.002

Processes:

netsh.execmd.exe

pid process

3780 netsh.exe
3724 cmd.exe

pid	process
3780	netsh.exe
3724	cmd.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

SVCHOST.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	SVCHOST.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	SVCHOST.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

Processes:

schtasks.exe

pid process

1536 schtasks.exe

pid	process
1536	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

SVCHOST.EXE

pid	process
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE
2248	SVCHOST.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

SVCHOST.EXE

description pid process

Token: SeDebugPrivilege 2248 SVCHOST.EXE
Token: SeDebugPrivilege 2248 SVCHOST.EXE

description	pid	process
Token: SeDebugPrivilege	2248	SVCHOST.EXE
Token: SeDebugPrivilege	2248	SVCHOST.EXE

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

cnchecker4.exeSVCHOST.EXEcmd.execmd.exe

description	pid	process	target process
PID 1328 wrote to memory of 3116	1328	cnchecker4.exe	CNCHECKER3.EXE
PID 1328 wrote to memory of 3116	1328	cnchecker4.exe	CNCHECKER3.EXE
PID 1328 wrote to memory of 2248	1328	cnchecker4.exe	SVCHOST.EXE
PID 1328 wrote to memory of 2248	1328	cnchecker4.exe	SVCHOST.EXE
PID 1328 wrote to memory of 2248	1328	cnchecker4.exe	SVCHOST.EXE
PID 2248 wrote to memory of 3724	2248	SVCHOST.EXE	cmd.exe
PID 2248 wrote to memory of 3724	2248	SVCHOST.EXE	cmd.exe
PID 2248 wrote to memory of 3724	2248	SVCHOST.EXE	cmd.exe
PID 3724 wrote to memory of 4356	3724	cmd.exe	chcp.com
PID 3724 wrote to memory of 4356	3724	cmd.exe	chcp.com
PID 3724 wrote to memory of 4356	3724	cmd.exe	chcp.com
PID 3724 wrote to memory of 3780	3724	cmd.exe	netsh.exe
PID 3724 wrote to memory of 3780	3724	cmd.exe	netsh.exe
PID 3724 wrote to memory of 3780	3724	cmd.exe	netsh.exe
PID 3724 wrote to memory of 1088	3724	cmd.exe	findstr.exe
PID 3724 wrote to memory of 1088	3724	cmd.exe	findstr.exe
PID 3724 wrote to memory of 1088	3724	cmd.exe	findstr.exe
PID 2248 wrote to memory of 620	2248	SVCHOST.EXE	cmd.exe
PID 2248 wrote to memory of 620	2248	SVCHOST.EXE	cmd.exe
PID 2248 wrote to memory of 620	2248	SVCHOST.EXE	cmd.exe
PID 620 wrote to memory of 3764	620	cmd.exe	chcp.com
PID 620 wrote to memory of 3764	620	cmd.exe	chcp.com
PID 620 wrote to memory of 3764	620	cmd.exe	chcp.com
PID 620 wrote to memory of 836	620	cmd.exe	netsh.exe
PID 620 wrote to memory of 836	620	cmd.exe	netsh.exe
PID 620 wrote to memory of 836	620	cmd.exe	netsh.exe
PID 2248 wrote to memory of 1536	2248	SVCHOST.EXE	schtasks.exe
PID 2248 wrote to memory of 1536	2248	SVCHOST.EXE	schtasks.exe
PID 2248 wrote to memory of 1536	2248	SVCHOST.EXE	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\cnchecker4.exe
"C:\Users\Admin\AppData\Local\Temp\cnchecker4.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1328
- C:\Users\Admin\AppData\Local\Temp\CNCHECKER3.EXE
  "C:\Users\Admin\AppData\Local\Temp\CNCHECKER3.EXE"
  2⤵
  - Executes dropped EXE
  PID:3116
- C:\Users\Admin\AppData\Local\Temp\SVCHOST.EXE
  "C:\Users\Admin\AppData\Local\Temp\SVCHOST.EXE"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2248
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Wi-Fi Discovery
    - Suspicious use of WriteProcessMemory
    PID:3724
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:4356
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show profile
      4⤵
      Event Triggered Execution: Netsh Helper DLL
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Wi-Fi Discovery
      PID:3780
  - - C:\Windows\SysWOW64\findstr.exe
      findstr All
      4⤵
      System Location Discovery: System Language Discovery
      PID:1088
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:620
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:3764
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show networks mode=bssid
      4⤵
      Event Triggered Execution: Netsh Helper DLL
      System Location Discovery: System Language Discovery
      PID:836
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "Chrome Update" /tr "C:\Users\Admin\AppData\Local\Temp\SVCHOST.EXE"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Wi-Fi Discovery

1

T1016.002

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\06ebb5b204e4f092eebc290fddc8d0c2\Admin@UTKBEBLO_en-US\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\06ebb5b204e4f092eebc290fddc8d0c2\Admin@UTKBEBLO_en-US\System\Process.txt

Filesize
4KB

MD5
fb867ca3ab70446fe1287f357b054ce7

SHA1
5c5ae3f02bafc9da891ceb0b52c2049b5518d3df

SHA256
e3a087e0624570f8601bde6317b5b7d8cb36da40bad15ff9293452b49c90ba80

SHA512
445f27f04a02086682148d9970bba6272af4c2389c4d08473f266aa8d0a9d1823681b9fe32562f8dc0f6138236109acfe0c8aada4b533290c13c8c82674c86a0

Download Submit
C:\Users\Admin\AppData\Local\72bb288bac798342fbc8cedf20bc1502\msgid.dat

Filesize
2B

MD5
70efdf2ec9b086079795c442636b55fb

SHA1
0716d9708d321ffb6a00818614779e779925365c

SHA256
4523540f1504cd17100c4835e85b7eefd49911580f8efff0599a8f283be6b9e3

SHA512
dc2de67eb248dcdc50c63aabd1bca8335ad01106dd8ff720590077c161f558a7b61db3c56b3a32997597a3db98fd191c3e9e7fdf555aac1525f0b5342cac4088

Download Submit
C:\Users\Admin\AppData\Local\Temp\CNCHECKER3.EXE

Filesize
6.6MB

MD5
4841f7e00c8757f9b0162e8cb09b03fc

SHA1
e248569e3de83d278e73f3dde2c02d90f85908f3

SHA256
8cb9d9efcc08a7ba56c8dffc34514e652da16e92d7c1c2338c71b1c0cce2184c

SHA512
e0f48c1ea950799c3dba1926132793fe0457bfd3772f60287a28453f84b0dd5b93c600e36d9e40974721acc856a37f835fd5ec0ad7933a63c4430ffdbfb089a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\SVCHOST.EXE

Filesize
232KB

MD5
905d8f8b1d16ce5c63f6a806e1efeb98

SHA1
75c8c39c0bb5e48f53f1585a9cefa03a997dc680

SHA256
78dcc1bbf29a5d6e5cb57506f273d41e8629232bc733bb4126955f40f60f63f4

SHA512
f0c00f773909bc0b04e638196f902f314d75000e04ed7bc72b3d9b35c4278de3f18d7e02aaf85e70207860aa3d920d167c62e14bbdf9289481bcf516ebf87a5f

Download Submit
memory/2248-23-0x00000000062A0000-0x0000000006332000-memory.dmp

Filesize
584KB

Download
memory/2248-22-0x00000000067B0000-0x0000000006D54000-memory.dmp

Filesize
5.6MB

Download
memory/2248-21-0x00000000058B0000-0x0000000005916000-memory.dmp

Filesize
408KB

Download
memory/2248-20-0x00000000007A0000-0x00000000007E0000-memory.dmp

Filesize
256KB

Download
memory/2248-173-0x0000000006710000-0x000000000671A000-memory.dmp

Filesize
40KB

Download
memory/2248-174-0x00000000740CE000-0x00000000740CF000-memory.dmp

Filesize
4KB

Download
memory/2248-19-0x00000000740CE000-0x00000000740CF000-memory.dmp

Filesize
4KB

Download
memory/2248-180-0x0000000006DE0000-0x0000000006DF2000-memory.dmp

Filesize
72KB

Download
memory/2248-205-0x00000000080E0000-0x00000000080EA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads