asyncrat | 02f4c1fef324c120432c4d54cd97d4aef3eddc2c426b03f9990cdeef37bdf6c9

General

Target

XWormLoader 5.1 x32.exe
Size

256KB
MD5

dfad6480336587ed4ca5f713db8e5bc5
SHA1

61e57a8e6ccb6e46623f51726c1f5851724c4a58
SHA256

02f4c1fef324c120432c4d54cd97d4aef3eddc2c426b03f9990cdeef37bdf6c9
SHA512

6f19ea16ec970529a4b38edbac13e5229580fe29303a8b3e3b7646637f44d73434fdfb029eee33e26fbbfb91489cf7156cc1ec12c3658ddeacad340235121a85
SSDEEP

3072:jMSncRzAOFI2o8F7CSQkPKufUYFm5boDkf6d6xHA2ewhLapuvpAsZOyMqmyBeYV7:YSncRl3oQXC5bdfdl/GWGwqqm1

Score

10^/10

asyncrat rat1 discovery rat

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Botnet

rat1

C2

xfreddy2751.duckdns.org:6606

xfreddy2751.duckdns.org:7707

xfreddy2751.duckdns.org:8808

darkstorm275991.ddns.net:6606

darkstorm275991.ddns.net:7707

darkstorm275991.ddns.net:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
License.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x00090000000233ea-15.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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	XWormLoader 5.1 x32.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	NEW.EXE

Executes dropped EXE 3 IoCs

pid	Process
4672	CONSOLEAPP1.EXE
716	NEW.EXE
4268	License.exe

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 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	NEW.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CONSOLEAPP1.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	License.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	XWormLoader 5.1 x32.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	taskmgr.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1892	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
4996	schtasks.exe

Suspicious behavior: EnumeratesProcesses 34 IoCs

pid	Process
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
716	NEW.EXE
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	716	NEW.EXE
Token: SeDebugPrivilege	4268	License.exe
Token: SeDebugPrivilege	2452	taskmgr.exe
Token: SeSystemProfilePrivilege	2452	taskmgr.exe
Token: SeCreateGlobalPrivilege	2452	taskmgr.exe
Token: 33	2452	taskmgr.exe
Token: SeIncBasePriorityPrivilege	2452	taskmgr.exe

Suspicious use of FindShellTrayWindow 39 IoCs

pid	Process
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe

Suspicious use of SendNotifyMessage 39 IoCs

pid	Process
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe
2452	taskmgr.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4868 wrote to memory of 4672	4868	XWormLoader 5.1 x32.exe	85
PID 4868 wrote to memory of 4672	4868	XWormLoader 5.1 x32.exe	85
PID 4868 wrote to memory of 4672	4868	XWormLoader 5.1 x32.exe	85
PID 4868 wrote to memory of 716	4868	XWormLoader 5.1 x32.exe	87
PID 4868 wrote to memory of 716	4868	XWormLoader 5.1 x32.exe	87
PID 4868 wrote to memory of 716	4868	XWormLoader 5.1 x32.exe	87
PID 716 wrote to memory of 4456	716	NEW.EXE	90
PID 716 wrote to memory of 4456	716	NEW.EXE	90
PID 716 wrote to memory of 4456	716	NEW.EXE	90
PID 716 wrote to memory of 4972	716	NEW.EXE	92
PID 716 wrote to memory of 4972	716	NEW.EXE	92
PID 716 wrote to memory of 4972	716	NEW.EXE	92
PID 4456 wrote to memory of 4996	4456	cmd.exe	94
PID 4456 wrote to memory of 4996	4456	cmd.exe	94
PID 4456 wrote to memory of 4996	4456	cmd.exe	94
PID 4972 wrote to memory of 1892	4972	cmd.exe	95
PID 4972 wrote to memory of 1892	4972	cmd.exe	95
PID 4972 wrote to memory of 1892	4972	cmd.exe	95
PID 4972 wrote to memory of 4268	4972	cmd.exe	96
PID 4972 wrote to memory of 4268	4972	cmd.exe	96
PID 4972 wrote to memory of 4268	4972	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\XWormLoader 5.1 x32.exe
"C:\Users\Admin\AppData\Local\Temp\XWormLoader 5.1 x32.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4868
- C:\Users\Admin\AppData\Local\Temp\CONSOLEAPP1.EXE
  "C:\Users\Admin\AppData\Local\Temp\CONSOLEAPP1.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4672
- C:\Users\Admin\AppData\Local\Temp\NEW.EXE
  "C:\Users\Admin\AppData\Local\Temp\NEW.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:716
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "License" /tr '"C:\Users\Admin\AppData\Roaming\License.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4456
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "License" /tr '"C:\Users\Admin\AppData\Roaming\License.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:4996
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp85E9.tmp.bat""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4972
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:1892
  - - C:\Users\Admin\AppData\Roaming\License.exe
      "C:\Users\Admin\AppData\Roaming\License.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:4268

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {24AC8F2B-4D4A-4C17-9607-6A4B14068F97} -Embedding
1⤵
PID:2260

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /7
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2452

Network

MITRE ATT&CK Enterprise v15

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

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

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\Temp\CONSOLEAPP1.EXE

Filesize
4KB

MD5
3facc93eb70a073f208f90955fb055cb

SHA1
8f04cf5b9c9164f82b7e77034eee62396f6c5bf0

SHA256
608c73065d03ab7da0a0b8c8c3db3e073b2403a8d0249b9d684286f58e52dead

SHA512
269fb263dd7a2f383c2442a43e98435c4ee0767eab55c77ce5ff2e169089739e746f70208baaac2e4459076596a6afbf3fc8960d1ce9b8f46e91f7e462bd649c

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

Filesize
63KB

MD5
e2b473487e4b8429711aef51a68f56a4

SHA1
7d3119b07b951c68d17ae12e0764072a8c3d961b

SHA256
c2ced27749e5bf8d9d01de0feb58ab40818c3f4339dd9c5898b2b6168be2ce44

SHA512
ead5c2977428cd44eb98f48511dbce8e64f5544fc3f8cc3e706f24f5903eeca92207a07c18f089e4451f8ed5264c28b6e1e088437100cc6c7274432275d18dd1

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp85E9.tmp.bat

Filesize
151B

MD5
9476a3f8c8569c6842fe1f64cf715618

SHA1
5a510f8702c54d07215e869f74497d1578fe1baf

SHA256
44bddc947d2daff86f76cfc1b9532111b67c4bfe2af8e53c5a92d6789aa5d40d

SHA512
6ded7decb418df8351834ab8b0a0c3e56f7b6cdc793b76956e2ad1797539e1c6add5aca1849d3d1ef1878572d47300be348e94d93806cabcd5339c9d6962c750

Download Submit
memory/716-29-0x0000000005240000-0x00000000052DC000-memory.dmp

Filesize
624KB

Download
memory/716-22-0x00000000736EE000-0x00000000736EF000-memory.dmp

Filesize
4KB

Download
memory/716-24-0x0000000000970000-0x0000000000986000-memory.dmp

Filesize
88KB

Download
memory/716-34-0x00000000736E0000-0x0000000073E90000-memory.dmp

Filesize
7.7MB

Download
memory/716-28-0x00000000736E0000-0x0000000073E90000-memory.dmp

Filesize
7.7MB

Download
memory/2452-50-0x000002541AC00000-0x000002541AC01000-memory.dmp

Filesize
4KB

Download
memory/2452-39-0x000002541AC00000-0x000002541AC01000-memory.dmp

Filesize
4KB

Download
memory/2452-41-0x000002541AC00000-0x000002541AC01000-memory.dmp

Filesize
4KB

Download
memory/2452-40-0x000002541AC00000-0x000002541AC01000-memory.dmp

Filesize
4KB

Download
memory/2452-51-0x000002541AC00000-0x000002541AC01000-memory.dmp

Filesize
4KB

Download
memory/2452-49-0x000002541AC00000-0x000002541AC01000-memory.dmp

Filesize
4KB

Download
memory/2452-48-0x000002541AC00000-0x000002541AC01000-memory.dmp

Filesize
4KB

Download
memory/2452-47-0x000002541AC00000-0x000002541AC01000-memory.dmp

Filesize
4KB

Download
memory/2452-46-0x000002541AC00000-0x000002541AC01000-memory.dmp

Filesize
4KB

Download
memory/2452-45-0x000002541AC00000-0x000002541AC01000-memory.dmp

Filesize
4KB

Download
memory/4672-27-0x00000000736E0000-0x0000000073E90000-memory.dmp

Filesize
7.7MB

Download
memory/4672-25-0x00000000736E0000-0x0000000073E90000-memory.dmp

Filesize
7.7MB

Download
memory/4672-23-0x0000000000CD0000-0x0000000000CD8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads