asyncrat | a2251164857af32d0a13d3d91c9cb17af07f5858ad935c666a4787f12d585622

General

Target

Builder.exe
Size

273KB
MD5

2a388e389df3136db839745d13a2bbd0
SHA1

1ba063842110c80d2a6bdf8280ec88b426b9d4ea
SHA256

a2251164857af32d0a13d3d91c9cb17af07f5858ad935c666a4787f12d585622
SHA512

01715c872281fffd8587f5cdabb5a9d80c720871424a6bf50ad0e8de7aae69536d0d4ffecb611ecfb8e98190e96b8ba896c96bf2dc0ebdda511f74909b5cb559
SSDEEP

3072:Ee8p6ewdOIwQx76vK/bvTv0cU+lL/dMlZZUZ0b2gTiwARE+WpC/Bz65/M6If+3JC:g6ewwIwQJ6vKX0c5MlYZ0b2zFxBt25

Score

10^/10

asyncrat stormkitty default 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/bot5602729079:AAHue5HGrezQGgwKeWyn3WQgaqOZM5nlF_c/sendMessage?chat_id=6067717150

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

StormKitty payload 1 IoCs

resource	yara_rule
behavioral1/memory/4924-1-0x0000000000E90000-0x0000000000EDA000-memory.dmp	family_stormkitty

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
T1552.001

Drops desktop.ini file(s) 9 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	Builder.exe
File created	C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Builder.exe
File created	C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Builder.exe
File created	C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Builder.exe
File created	C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Builder.exe
File opened for modification	C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Builder.exe
File opened for modification	C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Builder.exe
File opened for modification	C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Builder.exe
File created	C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	Builder.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
39	pastebin.com
40	pastebin.com

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
29	icanhazip.com

Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.

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

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

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Builder.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	Builder.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe
4924	Builder.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4924	Builder.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4924 wrote to memory of 1432	4924	Builder.exe	86
PID 4924 wrote to memory of 1432	4924	Builder.exe	86
PID 4924 wrote to memory of 1432	4924	Builder.exe	86
PID 1432 wrote to memory of 4092	1432	cmd.exe	88
PID 1432 wrote to memory of 4092	1432	cmd.exe	88
PID 1432 wrote to memory of 4092	1432	cmd.exe	88
PID 1432 wrote to memory of 3200	1432	cmd.exe	89
PID 1432 wrote to memory of 3200	1432	cmd.exe	89
PID 1432 wrote to memory of 3200	1432	cmd.exe	89
PID 1432 wrote to memory of 3976	1432	cmd.exe	90
PID 1432 wrote to memory of 3976	1432	cmd.exe	90
PID 1432 wrote to memory of 3976	1432	cmd.exe	90
PID 4924 wrote to memory of 2324	4924	Builder.exe	91
PID 4924 wrote to memory of 2324	4924	Builder.exe	91
PID 4924 wrote to memory of 2324	4924	Builder.exe	91
PID 2324 wrote to memory of 3512	2324	cmd.exe	93
PID 2324 wrote to memory of 3512	2324	cmd.exe	93
PID 2324 wrote to memory of 3512	2324	cmd.exe	93
PID 2324 wrote to memory of 4892	2324	cmd.exe	94
PID 2324 wrote to memory of 4892	2324	cmd.exe	94
PID 2324 wrote to memory of 4892	2324	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\Builder.exe
"C:\Users\Admin\AppData\Local\Temp\Builder.exe"
1⤵
- Drops desktop.ini file(s)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4924
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1432
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:4092
- - C:\Windows\SysWOW64\netsh.exe
    netsh wlan show profile
    3⤵
    - Event Triggered Execution: Netsh Helper DLL
    PID:3200
- - C:\Windows\SysWOW64\findstr.exe
    findstr All
    3⤵
    PID:3976
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2324
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:3512
- - C:\Windows\SysWOW64\netsh.exe
    netsh wlan show networks mode=bssid
    3⤵
    - Event Triggered Execution: Netsh Helper DLL
    PID:4892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\0dab4b5c9ecb309f1bdb975e04a5daea\Admin@DJVPRFTV_en-US\System\Process.txt

Filesize
4KB

MD5
b4364ac87b70768583e8e3e03ac28e67

SHA1
c78330b548c252df386347b30e009b0e86c98a63

SHA256
af927295cb0f05b125969dedf13c491e36572f694137f72d96a57c76a236ee45

SHA512
b46f48eab330434014fed899b01b6c2dece388497a76610c055af83b475ab51e48dc67e7df92833b64d2ea5b97e5a9b82ace44afadf3d9bae6567f44f7f3fabd

Download Submit
C:\Users\Admin\AppData\Local\9bdd551bc979c694722c0c964dbc7678\msgid.dat

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/4924-146-0x00000000061F0000-0x0000000006282000-memory.dmp

Filesize
584KB

Download
memory/4924-3-0x00000000059F0000-0x0000000005A56000-memory.dmp

Filesize
408KB

Download
memory/4924-144-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download
memory/4924-0-0x0000000074A6E000-0x0000000074A6F000-memory.dmp

Filesize
4KB

Download
memory/4924-147-0x0000000006840000-0x0000000006DE4000-memory.dmp

Filesize
5.6MB

Download
memory/4924-151-0x0000000074A6E000-0x0000000074A6F000-memory.dmp

Filesize
4KB

Download
memory/4924-152-0x0000000006420000-0x000000000642A000-memory.dmp

Filesize
40KB

Download
memory/4924-2-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download
memory/4924-158-0x0000000005DB0000-0x0000000005DC2000-memory.dmp

Filesize
72KB

Download
memory/4924-1-0x0000000000E90000-0x0000000000EDA000-memory.dmp

Filesize
296KB

Download
memory/4924-181-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download
memory/4924-182-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads