asyncrat | 02f4c1fef324c120432c4d54cd97d4aef3eddc2c426b03f9990cdeef37bdf6c9

General

Target

XWormLoader 5.1 x64.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/0x00080000000234d8-14.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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	XWormLoader 5.1 x64.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	NEW.EXE

Executes dropped EXE 3 IoCs

pid	Process
4744	CONSOLEAPP1.EXE
4156	NEW.EXE
2960	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	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	License.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	XWormLoader 5.1 x64.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NEW.EXE

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2824	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
3172	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE
4156	NEW.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4156	NEW.EXE
Token: SeDebugPrivilege	2960	License.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 4744	4808	XWormLoader 5.1 x64.exe	85
PID 4808 wrote to memory of 4744	4808	XWormLoader 5.1 x64.exe	85
PID 4808 wrote to memory of 4744	4808	XWormLoader 5.1 x64.exe	85
PID 4808 wrote to memory of 4156	4808	XWormLoader 5.1 x64.exe	87
PID 4808 wrote to memory of 4156	4808	XWormLoader 5.1 x64.exe	87
PID 4808 wrote to memory of 4156	4808	XWormLoader 5.1 x64.exe	87
PID 4156 wrote to memory of 3176	4156	NEW.EXE	89
PID 4156 wrote to memory of 3176	4156	NEW.EXE	89
PID 4156 wrote to memory of 3176	4156	NEW.EXE	89
PID 4156 wrote to memory of 688	4156	NEW.EXE	91
PID 4156 wrote to memory of 688	4156	NEW.EXE	91
PID 4156 wrote to memory of 688	4156	NEW.EXE	91
PID 3176 wrote to memory of 3172	3176	cmd.exe	93
PID 3176 wrote to memory of 3172	3176	cmd.exe	93
PID 3176 wrote to memory of 3172	3176	cmd.exe	93
PID 688 wrote to memory of 2824	688	cmd.exe	94
PID 688 wrote to memory of 2824	688	cmd.exe	94
PID 688 wrote to memory of 2824	688	cmd.exe	94
PID 688 wrote to memory of 2960	688	cmd.exe	95
PID 688 wrote to memory of 2960	688	cmd.exe	95
PID 688 wrote to memory of 2960	688	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\XWormLoader 5.1 x64.exe
"C:\Users\Admin\AppData\Local\Temp\XWormLoader 5.1 x64.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4808
- 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:4744
- 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:4156
- - 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:3176
  - - 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:3172
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC515.tmp.bat""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:688
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:2824
  - - 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:2960

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

Query Registry

1

T1012

System Information Discovery

2

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\tmpC515.tmp.bat

Filesize
151B

MD5
bc2d672eb336ec9ebc05edef40d22033

SHA1
c61032bf3017a87e0393a7fb4970846b267f16e9

SHA256
0ad2ffeb58e27d86dff42c3ed2e62fb743b551be447d77c258c5c5b0bddc2265

SHA512
ed2dc5a02ca2bf27c55278f93b512f88700ee8aa5f49eb9d710f2cb7fd35e73fcd3937ab344553dee1ec12169ca200bb3a8ebbf88f43eaf8725d25fa6784d2e7

Download Submit
memory/4156-21-0x000000007493E000-0x000000007493F000-memory.dmp

Filesize
4KB

Download
memory/4156-24-0x0000000000B90000-0x0000000000BA6000-memory.dmp

Filesize
88KB

Download
memory/4156-28-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/4156-29-0x00000000055D0000-0x000000000566C000-memory.dmp

Filesize
624KB

Download
memory/4156-34-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/4744-23-0x00000000002B0000-0x00000000002B8000-memory.dmp

Filesize
32KB

Download
memory/4744-25-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/4744-27-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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