asyncrat | c148cc14f15b71a2d3f5e6bce6b706744f6b373a7e6c090c14f46f81d2d6e82f

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2024 20:03

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

EXMservice.exe
Size

12.0MB
MD5

aab9c36b98e2aeff996b3b38db070527
SHA1

4c2910e1e9b643f16269a2e59e3ada80fa70e5fa
SHA256

c148cc14f15b71a2d3f5e6bce6b706744f6b373a7e6c090c14f46f81d2d6e82f
SHA512

0db75756a041a7cda6b384718581aaf11e6873614465dd56e81f17ad171cffe380e288a3c2ee540222190392904921f26df8a1d66d4108051c60fc8e5b2df779
SSDEEP

6144:tgIFnaVf5qSsmMLN6+kjn7nPZDt7FY7n16EUkKUBnf6R3Xnd:4fA5y7PhNi71PfKUV6R3X

Score

10^/10

asyncrat stormkitty xworm default discovery persistence privilege_escalation rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%LocalAppData%
install_file
USB.exe
pastebin_url
https://pastebin.com/raw/ZnhxAV6a
telegram
https://api.telegram.org/bot7538644364:AAHEMV7mmxz6PSRgzo0ORf3_n0BaazmrAqk/sendMessage?chat_id=7541917888

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot7538644364:AAHEMV7mmxz6PSRgzo0ORf3_n0BaazmrAqk/sendMessage?chat_id=7541917888

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

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023b88-6.dat	family_xworm
behavioral2/memory/3324-59-0x00000000000E0000-0x000000000010A000-memory.dmp	family_xworm

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

StormKitty payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023c81-35.dat	family_stormkitty
behavioral2/memory/1204-64-0x0000000000B70000-0x0000000000BAE000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x0007000000023c81-35.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	EXMservice.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	msedge.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\msedge.lnk	msedge.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\msedge.lnk	msedge.exe

Executes dropped EXE 4 IoCs

pid	Process
3324	msedge.exe
1204	svchost.exe
2024	msedge.exe
4780	msedge.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

Drops desktop.ini file(s) 8 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Local\5c690511666ed089a3eccf2e27e3a1b3\Admin@GUMLNLFE_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	svchost.exe
File created	C:\Users\Admin\AppData\Local\5c690511666ed089a3eccf2e27e3a1b3\Admin@GUMLNLFE_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\5c690511666ed089a3eccf2e27e3a1b3\Admin@GUMLNLFE_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	svchost.exe
File created	C:\Users\Admin\AppData\Local\5c690511666ed089a3eccf2e27e3a1b3\Admin@GUMLNLFE_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	svchost.exe
File created	C:\Users\Admin\AppData\Local\5c690511666ed089a3eccf2e27e3a1b3\Admin@GUMLNLFE_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	svchost.exe
File created	C:\Users\Admin\AppData\Local\5c690511666ed089a3eccf2e27e3a1b3\Admin@GUMLNLFE_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	svchost.exe
File created	C:\Users\Admin\AppData\Local\5c690511666ed089a3eccf2e27e3a1b3\Admin@GUMLNLFE_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	svchost.exe
File created	C:\Users\Admin\AppData\Local\5c690511666ed089a3eccf2e27e3a1b3\Admin@GUMLNLFE_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	svchost.exe

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

Web Service

T1102

flow	ioc
14	pastebin.com
15	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
30	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

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 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
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	chcp.com
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
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	svchost.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

pid	Process
408	cmd.exe
1932	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 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

pid	Process
2372	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3324	msedge.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
3324	msedge.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe
1204	svchost.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3324	msedge.exe
Token: SeDebugPrivilege	1204	svchost.exe
Token: SeDebugPrivilege	3324	msedge.exe
Token: SeDebugPrivilege	2024	msedge.exe
Token: SeDebugPrivilege	4780	msedge.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3324	msedge.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 4836 wrote to memory of 3324	4836	EXMservice.exe	83
PID 4836 wrote to memory of 3324	4836	EXMservice.exe	83
PID 4836 wrote to memory of 1204	4836	EXMservice.exe	84
PID 4836 wrote to memory of 1204	4836	EXMservice.exe	84
PID 4836 wrote to memory of 1204	4836	EXMservice.exe	84
PID 3324 wrote to memory of 2372	3324	msedge.exe	92
PID 3324 wrote to memory of 2372	3324	msedge.exe	92
PID 1204 wrote to memory of 408	1204	svchost.exe	99
PID 1204 wrote to memory of 408	1204	svchost.exe	99
PID 1204 wrote to memory of 408	1204	svchost.exe	99
PID 408 wrote to memory of 4848	408	cmd.exe	101
PID 408 wrote to memory of 4848	408	cmd.exe	101
PID 408 wrote to memory of 4848	408	cmd.exe	101
PID 408 wrote to memory of 1932	408	cmd.exe	102
PID 408 wrote to memory of 1932	408	cmd.exe	102
PID 408 wrote to memory of 1932	408	cmd.exe	102
PID 408 wrote to memory of 2616	408	cmd.exe	103
PID 408 wrote to memory of 2616	408	cmd.exe	103
PID 408 wrote to memory of 2616	408	cmd.exe	103
PID 1204 wrote to memory of 928	1204	svchost.exe	104
PID 1204 wrote to memory of 928	1204	svchost.exe	104
PID 1204 wrote to memory of 928	1204	svchost.exe	104
PID 928 wrote to memory of 2564	928	cmd.exe	106
PID 928 wrote to memory of 2564	928	cmd.exe	106
PID 928 wrote to memory of 2564	928	cmd.exe	106
PID 928 wrote to memory of 1808	928	cmd.exe	107
PID 928 wrote to memory of 1808	928	cmd.exe	107
PID 928 wrote to memory of 1808	928	cmd.exe	107

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\EXMservice.exe
"C:\Users\Admin\AppData\Local\Temp\EXMservice.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4836
- C:\Users\Admin\msedge.exe
  "C:\Users\Admin\msedge.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3324
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "msedge" /tr "C:\Users\Admin\AppData\Local\msedge.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2372
- C:\Users\Admin\svchost.exe
  "C:\Users\Admin\svchost.exe"
  2⤵
  - 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:1204
- - 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:408
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:4848
  - - 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:1932
  - - C:\Windows\SysWOW64\findstr.exe
      findstr All
      4⤵
      System Location Discovery: System Language Discovery
      PID:2616
- - 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:928
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:2564
  - - 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:1808

C:\Users\Admin\AppData\Local\msedge.exe
C:\Users\Admin\AppData\Local\msedge.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2024

C:\Users\Admin\AppData\Local\msedge.exe
C:\Users\Admin\AppData\Local\msedge.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Wi-Fi Discovery

T1016.002

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\5c690511666ed089a3eccf2e27e3a1b3\Admin@GUMLNLFE_en-US\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\5c690511666ed089a3eccf2e27e3a1b3\Admin@GUMLNLFE_en-US\System\Process.txt

Filesize
4KB

MD5
f6fe594acb7bc50bc9a00e57ae295856

SHA1
90cea08b5c246ba54eab644aa2ad283373763dfa

SHA256
5e5c58a417ae54ce2f90762fa31fc29c7a3e8370284a1e80476d0e633fdba9b4

SHA512
4eaceb8df39f6a669f944391e17fa789d9822cf9977b1d75583c01755028f7ec70e94acd80bf784b7294ce8fd9ab0e1422490435d34ee9aab78bb04d45bb99c6

Download Submit
C:\Users\Admin\AppData\Local\5f3b689d64dce34d857c86e2da4217ed\msgid.dat

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\msedge.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\msedge.exe

Filesize
146KB

MD5
f1c2525da4f545e783535c2875962c13

SHA1
92bf515741775fac22690efc0e400f6997eba735

SHA256
9e6985fdb3bfa539f3d6d6fca9aaf18356c28a00604c4f961562c34fa9f11d0f

SHA512
56308ac106caa84798925661406a25047df8d90e4b65b587b261010293587938fa922fbb2cfdedfe71139e16bfcf38e54bb31cbcc00cd244db15d756459b6133

Download Submit
C:\Users\Admin\svchost.exe

Filesize
226KB

MD5
1bea6c3f126cf5446f134d0926705cee

SHA1
02c49933d0c2cc068402a93578d4768745490d58

SHA256
1d69b5b87c4cd1251c5c94461a455659febb683eab0ebd97dd30da2319ffc638

SHA512
eb9f423f6adb5e686a53f5f197e6b08455f8048d965a9ec850838fdf4724ef87f68945c435ace5a48a9a7226006a348e97586335d0246ea0dc898a412dea5df3

Download Submit
memory/1204-63-0x0000000074F4E000-0x0000000074F4F000-memory.dmp

Filesize
4KB

Download
memory/1204-64-0x0000000000B70000-0x0000000000BAE000-memory.dmp

Filesize
248KB

Download
memory/1204-65-0x0000000005C80000-0x0000000005CE6000-memory.dmp

Filesize
408KB

Download
memory/1204-227-0x00000000067E0000-0x00000000067EA000-memory.dmp

Filesize
40KB

Download
memory/1204-223-0x0000000006C30000-0x00000000071D4000-memory.dmp

Filesize
5.6MB

Download
memory/1204-222-0x00000000065E0000-0x0000000006672000-memory.dmp

Filesize
584KB

Download
memory/1204-170-0x0000000074F4E000-0x0000000074F4F000-memory.dmp

Filesize
4KB

Download
memory/3324-62-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

Filesize
10.8MB

Download
memory/3324-171-0x000000001AD10000-0x000000001AD20000-memory.dmp

Filesize
64KB

Download
memory/3324-166-0x00007FFB76540000-0x00007FFB77001000-memory.dmp

Filesize
10.8MB

Download
memory/3324-59-0x00000000000E0000-0x000000000010A000-memory.dmp

Filesize
168KB

Download
memory/3324-233-0x000000001AD10000-0x000000001AD20000-memory.dmp

Filesize
64KB

Download
memory/4836-0-0x00007FFB76543000-0x00007FFB76545000-memory.dmp

Filesize
8KB

Download
memory/4836-1-0x0000000000F00000-0x0000000000F66000-memory.dmp

Filesize
408KB

Download