asyncrat | 82acc1095843da9a689f138666b41520ccb2bda8be0c8b3cd734adbfa14d6746

Analysis

max time kernel
160s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
18/01/2023, 22:36

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General

Target
c7fbe52e88456eabb4d4a1a1a0670cf4.exe
Size 335KB
Sample230118-2h8xcsbf58
SHA256 82acc1095843da9a689f138666b41520ccb2bda8be0c8b3cd734adbfa14d6746
MD5 c7fbe52e88456eabb4d4a1a1a0670cf4
SHA1 3b479f15645c31c7067c31aede6e1802093ac78b
SHA512 3302aa29196e3864850c7f6bfdc274a285f3f51fd1d60b0e728caa29b4f25bc70f30429819de1ea27855841fa0ec00f0fec69c1745794a96c5c19d11d0c8fa05
SSDEEP 6144:wcjrQ/rcaXeLfKqsmLjCkHhUcuS37N7E+rdR2cFoWIEh89dHHWtjunUU:wcjiuJsmXCkStSLNnRVFopEhAdH2tK
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat stormkitty default persistence rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:6606
127.0.0.1:7707
127.0.0.1:8808
https://api.telegram.org/bot5980420064:AAHGrlOU2WsgF90Pcyz-L7wrGgC_Cj54k4Q/sendMessage?chat_id=806259874

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.
rat asyncrat
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 3 IoCs

resource	yara_rule
behavioral2/files/0x0007000000022e3a-138.dat	family_stormkitty
behavioral2/files/0x0007000000022e3a-141.dat	family_stormkitty
behavioral2/memory/2188-143-0x0000000000CE0000-0x0000000000D12000-memory.dmp	family_stormkitty

Async RAT payload 3 IoCs

rat

resource	yara_rule
behavioral2/files/0x0007000000022e3a-138.dat	asyncrat
behavioral2/files/0x0007000000022e3a-141.dat	asyncrat
behavioral2/memory/2188-143-0x0000000000CE0000-0x0000000000D12000-memory.dmp	asyncrat

Executes dropped EXE 3 IoCs

pid	Process
4392	WindowsDataC.exe
2188	wwst.exe
3344	RunIt.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	c7fbe52e88456eabb4d4a1a1a0670cf4.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsDataC.exe = "C:\\ProgramData\\WindowsDataC.exe"	c7fbe52e88456eabb4d4a1a1a0670cf4.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rnts.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Rnts.exe"	RunIt.exe

Drops desktop.ini file(s) 9 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\b48d5d098f6dfb5de295400791245a96\Admin@SOCAAGDT_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	wwst.exe
File opened for modification	C:\Users\Admin\AppData\Local\b48d5d098f6dfb5de295400791245a96\Admin@SOCAAGDT_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	wwst.exe
File opened for modification	C:\Users\Admin\AppData\Local\b48d5d098f6dfb5de295400791245a96\Admin@SOCAAGDT_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	wwst.exe
File created	C:\Users\Admin\AppData\Local\b48d5d098f6dfb5de295400791245a96\Admin@SOCAAGDT_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	wwst.exe
File opened for modification	C:\Users\Admin\AppData\Local\b48d5d098f6dfb5de295400791245a96\Admin@SOCAAGDT_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	wwst.exe
File created	C:\Users\Admin\AppData\Local\b48d5d098f6dfb5de295400791245a96\Admin@SOCAAGDT_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	wwst.exe
File created	C:\Users\Admin\AppData\Local\b48d5d098f6dfb5de295400791245a96\Admin@SOCAAGDT_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	wwst.exe
File created	C:\Users\Admin\AppData\Local\b48d5d098f6dfb5de295400791245a96\Admin@SOCAAGDT_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	wwst.exe
File created	C:\Users\Admin\AppData\Local\b48d5d098f6dfb5de295400791245a96\Admin@SOCAAGDT_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	wwst.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.

flow	ioc
41	icanhazip.com

Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	wwst.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	wwst.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe
2188	wwst.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	wwst.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 4984 wrote to memory of 4392	4984	c7fbe52e88456eabb4d4a1a1a0670cf4.exe	82
PID 4984 wrote to memory of 4392	4984	c7fbe52e88456eabb4d4a1a1a0670cf4.exe	82
PID 4984 wrote to memory of 2188	4984	c7fbe52e88456eabb4d4a1a1a0670cf4.exe	83
PID 4984 wrote to memory of 2188	4984	c7fbe52e88456eabb4d4a1a1a0670cf4.exe	83
PID 4984 wrote to memory of 2188	4984	c7fbe52e88456eabb4d4a1a1a0670cf4.exe	83
PID 4984 wrote to memory of 3344	4984	c7fbe52e88456eabb4d4a1a1a0670cf4.exe	84
PID 4984 wrote to memory of 3344	4984	c7fbe52e88456eabb4d4a1a1a0670cf4.exe	84
PID 4984 wrote to memory of 3344	4984	c7fbe52e88456eabb4d4a1a1a0670cf4.exe	84
PID 2188 wrote to memory of 4352	2188	wwst.exe	91
PID 2188 wrote to memory of 4352	2188	wwst.exe	91
PID 2188 wrote to memory of 4352	2188	wwst.exe	91
PID 4352 wrote to memory of 924	4352	cmd.exe	93
PID 4352 wrote to memory of 924	4352	cmd.exe	93
PID 4352 wrote to memory of 924	4352	cmd.exe	93
PID 4352 wrote to memory of 3580	4352	cmd.exe	94
PID 4352 wrote to memory of 3580	4352	cmd.exe	94
PID 4352 wrote to memory of 3580	4352	cmd.exe	94
PID 4352 wrote to memory of 2668	4352	cmd.exe	95
PID 4352 wrote to memory of 2668	4352	cmd.exe	95
PID 4352 wrote to memory of 2668	4352	cmd.exe	95
PID 2188 wrote to memory of 2628	2188	wwst.exe	96
PID 2188 wrote to memory of 2628	2188	wwst.exe	96
PID 2188 wrote to memory of 2628	2188	wwst.exe	96
PID 2628 wrote to memory of 928	2628	cmd.exe	98
PID 2628 wrote to memory of 928	2628	cmd.exe	98
PID 2628 wrote to memory of 928	2628	cmd.exe	98
PID 2628 wrote to memory of 3584	2628	cmd.exe	99
PID 2628 wrote to memory of 3584	2628	cmd.exe	99
PID 2628 wrote to memory of 3584	2628	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\c7fbe52e88456eabb4d4a1a1a0670cf4.exe
"C:\Users\Admin\AppData\Local\Temp\c7fbe52e88456eabb4d4a1a1a0670cf4.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4984
- C:\ProgramData\WindowsDataC.exe
  "C:\ProgramData\WindowsDataC.exe"
  2⤵
  - Executes dropped EXE
  PID:4392
- C:\Users\Admin\AppData\Local\Temp\wwst.exe
  "C:\Users\Admin\AppData\Local\Temp\wwst.exe"
  2⤵
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2188
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4352
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      PID:924
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show profile
      4⤵
      PID:3580
  - - C:\Windows\SysWOW64\findstr.exe
      findstr All
      4⤵
      PID:2668
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2628
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      PID:928
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show networks mode=bssid
      4⤵
      PID:3584
- C:\Users\Admin\AppData\Local\Temp\RunIt.exe
  "C:\Users\Admin\AppData\Local\Temp\RunIt.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  PID:3344

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

WindowsDataC.exe

Path C:\ProgramData\WindowsDataC.exe
Size 335KB
SHA256 82acc1095843da9a689f138666b41520ccb2bda8be0c8b3cd734adbfa14d6746
MD5 c7fbe52e88456eabb4d4a1a1a0670cf4
SHA1 3b479f15645c31c7067c31aede6e1802093ac78b
SHA512 3302aa29196e3864850c7f6bfdc274a285f3f51fd1d60b0e728caa29b4f25bc70f30429819de1ea27855841fa0ec00f0fec69c1745794a96c5c19d11d0c8fa05
SSDEEP 6144:wcjrQ/rcaXeLfKqsmLjCkHhUcuS37N7E+rdR2cFoWIEh89dHHWtjunUU:wcjiuJsmXCkStSLNnRVFopEhAdH2tK
MD5 SHA1 SHA512 SSDEEP

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WindowsDataC.exe

Path C:\ProgramData\WindowsDataC.exe
Size 335KB
SHA256 82acc1095843da9a689f138666b41520ccb2bda8be0c8b3cd734adbfa14d6746
MD5 c7fbe52e88456eabb4d4a1a1a0670cf4
SHA1 3b479f15645c31c7067c31aede6e1802093ac78b
SHA512 3302aa29196e3864850c7f6bfdc274a285f3f51fd1d60b0e728caa29b4f25bc70f30429819de1ea27855841fa0ec00f0fec69c1745794a96c5c19d11d0c8fa05
SSDEEP 6144:wcjrQ/rcaXeLfKqsmLjCkHhUcuS37N7E+rdR2cFoWIEh89dHHWtjunUU:wcjiuJsmXCkStSLNnRVFopEhAdH2tK
MD5 SHA1 SHA512 SSDEEP

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RunIt.exe

Path C:\Users\Admin\AppData\Local\Temp\RunIt.exe
Size 143KB
SHA256 9770561d2a27dbc16c230fe88af51f718d7d6274fcd63a3f109c381be848b4a9
MD5 d067619856f7f3079375960f62b99369
SHA1 964d548557dec3aa8e851526b71adca4b4ddbfd5
SHA512 1ec891082ac133833217ce8314f6d163451c5554b789cbf8a5ff0d5ebd0b55a7ec49ea5c408bf784e6952a37526de9e77e6c39b9a4ea3b950c3fda44e7f973b8
SSDEEP 3072:iRjfP1ppKWaZK0fr1klb4lrpTP/NaLz+pMuWDxCcfguuy8:GjP/MWafrhrpTP/NaLz+pMuWFCuKy
MD5 SHA1 SHA512 SSDEEP

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RunIt.exe

Path C:\Users\Admin\AppData\Local\Temp\RunIt.exe
Size 143KB
SHA256 9770561d2a27dbc16c230fe88af51f718d7d6274fcd63a3f109c381be848b4a9
MD5 d067619856f7f3079375960f62b99369
SHA1 964d548557dec3aa8e851526b71adca4b4ddbfd5
SHA512 1ec891082ac133833217ce8314f6d163451c5554b789cbf8a5ff0d5ebd0b55a7ec49ea5c408bf784e6952a37526de9e77e6c39b9a4ea3b950c3fda44e7f973b8
SSDEEP 3072:iRjfP1ppKWaZK0fr1klb4lrpTP/NaLz+pMuWDxCcfguuy8:GjP/MWafrhrpTP/NaLz+pMuWFCuKy
MD5 SHA1 SHA512 SSDEEP

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wwst.exe

Path C:\Users\Admin\AppData\Local\Temp\wwst.exe
Size 175KB
SHA256 82e62dbfd6aa5df5162e2a6a9cd5a0dfb97f94fb5f5bf531ca9f974ec0464ae2
MD5 5224b9398f4ed7a52b85b432b3d50a04
SHA1 c7bfe32e841f87c2b15a8a9266ddb981e8786157
SHA512 2a6374f9bbad9f198e671d2707abfee1d74af935da62c89acac9e5be6467008b96f1879e61ab76a4a9fbf4b568b8d2f697bbc4fe79dc32eef7461686ca245ef0
SSDEEP 3072:2e8p6ewdOIwQx76vK/bvTv0cU+lL/dMlZZUZ0b2gTkwA5E+WpCc:u6ewwIwQJ6vKX0c5MlYZ0b2l
MD5 SHA1 SHA512 SSDEEP

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wwst.exe

Path C:\Users\Admin\AppData\Local\Temp\wwst.exe
Size 175KB
SHA256 82e62dbfd6aa5df5162e2a6a9cd5a0dfb97f94fb5f5bf531ca9f974ec0464ae2
MD5 5224b9398f4ed7a52b85b432b3d50a04
SHA1 c7bfe32e841f87c2b15a8a9266ddb981e8786157
SHA512 2a6374f9bbad9f198e671d2707abfee1d74af935da62c89acac9e5be6467008b96f1879e61ab76a4a9fbf4b568b8d2f697bbc4fe79dc32eef7461686ca245ef0
SSDEEP 3072:2e8p6ewdOIwQx76vK/bvTv0cU+lL/dMlZZUZ0b2gTkwA5E+WpCc:u6ewwIwQJ6vKX0c5MlYZ0b2l
MD5 SHA1 SHA512 SSDEEP

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memory/2188-160-0x0000000006570000-0x000000000657A000-memory.dmp

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memory/2188-152-0x0000000005760000-0x00000000057C6000-memory.dmp

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memory/2188-143-0x0000000000CE0000-0x0000000000D12000-memory.dmp

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memory/3344-146-0x00000000058E0000-0x0000000005E84000-memory.dmp

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memory/3344-148-0x00000000054D0000-0x000000000556C000-memory.dmp

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memory/3344-149-0x0000000005570000-0x000000000557A000-memory.dmp

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memory/3344-147-0x0000000005430000-0x00000000054C2000-memory.dmp

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memory/3344-144-0x0000000000810000-0x000000000083A000-memory.dmp

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memory/4392-145-0x00007FFAB22C0000-0x00007FFAB2D81000-memory.dmp

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memory/4392-151-0x00007FFAB22C0000-0x00007FFAB2D81000-memory.dmp

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memory/4984-132-0x0000000000400000-0x000000000045C000-memory.dmp

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memory/4984-150-0x00007FFAB22C0000-0x00007FFAB2D81000-memory.dmp

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memory/4984-133-0x00007FFAB22C0000-0x00007FFAB2D81000-memory.dmp

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