asyncrat | ee66a185008549b9ca0c687a78aa6a69e4770dd12cab9dc63d5346c1f570904b

Resubmissions

12/03/2025, 21:32

250312-1dmynatxey 10

11/03/2025, 16:10

250311-tmgdxaxnx4 10

06/03/2025, 02:30

250306-cze8yav1az 10

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
06/03/2025, 02:30

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General

Target

66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe
Size

363KB
MD5

ddbbbb0895f1997339c1c388f853f65d
SHA1

d79b5cab17509a0aaeef232947a3992a20a706be
SHA256

66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6
SHA512

a3912b39b1efe5e56b970ba4e2a64bc76a36c1edfc1774ac3dc987e9f89fa6468ff26db69e58854a1b11e58bcaa64789a223fadc9f599649cb5cc08db936307a
SSDEEP

6144:/dua0sl91E4sxEMu7PyV+xEv7C8825EbpU5:/dua0slPEZyMujyV2Op8O4U5

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

iphy.strangled.net:1604

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral20/files/0x000b000000023bd6-8.dat	family_asyncrat

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-1-5-21-1170604239-850860757-3112005715-1000\Control Panel\International\Geo\Nation	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe

Executes dropped EXE 3 IoCs

pid	Process
3636	AfraidDns_Async.exe
848	win10.exe
1880	win10.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2712	848	WerFault.exe	102
3104	1880	WerFault.exe	106

System Location Discovery: System Language Discovery 1 TTPs 7 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win10.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win10.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AfraidDns_Async.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
2648	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3344	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe
Token: SeDebugPrivilege	3636	AfraidDns_Async.exe
Token: SeDebugPrivilege	848	win10.exe
Token: SeDebugPrivilege	1880	win10.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3344 wrote to memory of 3636	3344	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe	92
PID 3344 wrote to memory of 3636	3344	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe	92
PID 3344 wrote to memory of 3636	3344	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe	92
PID 3344 wrote to memory of 4996	3344	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe	93
PID 3344 wrote to memory of 4996	3344	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe	93
PID 3344 wrote to memory of 4996	3344	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe	93
PID 4996 wrote to memory of 2648	4996	cmd.exe	95
PID 4996 wrote to memory of 2648	4996	cmd.exe	95
PID 4996 wrote to memory of 2648	4996	cmd.exe	95
PID 3344 wrote to memory of 624	3344	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe	96
PID 3344 wrote to memory of 624	3344	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe	96
PID 3344 wrote to memory of 624	3344	66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe	96

C:\Users\Admin\AppData\Local\Temp\66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe
"C:\Users\Admin\AppData\Local\Temp\66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3344
- C:\Users\Admin\AppData\Local\Temp\AfraidDns_Async.exe
  "C:\Users\Admin\AppData\Local\Temp\AfraidDns_Async.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:3636
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\win10\win10.exe'" /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4996
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\win10\win10.exe'" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2648
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe" "C:\Users\Admin\AppData\Local\Temp\win10\win10.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:624

C:\Users\Admin\AppData\Local\Temp\win10\win10.exe
C:\Users\Admin\AppData\Local\Temp\win10\win10.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:848
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 848 -s 888
  2⤵
  - Program crash
  PID:2712

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 848 -ip 848
1⤵
PID:4348

C:\Users\Admin\AppData\Local\Temp\win10\win10.exe
C:\Users\Admin\AppData\Local\Temp\win10\win10.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1880
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1880 -s 860
  2⤵
  - Program crash
  PID:3104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 1880 -ip 1880
1⤵
PID:2360

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\AfraidDns_Async.exe

Filesize
47KB

MD5
c1dcd0d286ad0121901f2c269c86d16b

SHA1
10acacc80588f73f5197adc0ea7cf1eadb49c793

SHA256
16d86733b11a9fd3ec2a732c2ca18c04c427d9fb9ddf1bdc14fe4109644854f9

SHA512
919dc181df55584c744d98344ae340ad2a844aed278570dc2729f430234e3ce7539bc9807a522c7b73d8e26c05cdf5a45851ba88688e7840b03e7ffb7c278618

Download Submit
C:\Users\Admin\AppData\Local\Temp\win10\win10.exe

Filesize
363KB

MD5
ddbbbb0895f1997339c1c388f853f65d

SHA1
d79b5cab17509a0aaeef232947a3992a20a706be

SHA256
66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6

SHA512
a3912b39b1efe5e56b970ba4e2a64bc76a36c1edfc1774ac3dc987e9f89fa6468ff26db69e58854a1b11e58bcaa64789a223fadc9f599649cb5cc08db936307a

Download Submit
memory/848-28-0x0000000000B30000-0x0000000000B90000-memory.dmp

Filesize
384KB

Download
memory/3344-1-0x0000000000850000-0x00000000008B0000-memory.dmp

Filesize
384KB

Download
memory/3344-2-0x00000000058F0000-0x0000000005E94000-memory.dmp

Filesize
5.6MB

Download
memory/3344-3-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3344-0-0x0000000074C7E000-0x0000000074C7F000-memory.dmp

Filesize
4KB

Download
memory/3344-20-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3636-16-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3636-22-0x0000000004E40000-0x0000000004EA6000-memory.dmp

Filesize
408KB

Download
memory/3636-23-0x00000000052F0000-0x000000000538C000-memory.dmp

Filesize
624KB

Download
memory/3636-24-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3636-25-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3636-21-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3636-15-0x00000000005E0000-0x00000000005F2000-memory.dmp

Filesize
72KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads