asyncrat | cc16889abbfe38386a105e602d856c512a2dfd51795ad55092ab27983e70b3b5

General

Target

MoonStealer-main/MoonStealer_assets/upx/updater.exe
Size

48KB
MD5

403e30df6166df14523e6f820703241a
SHA1

9f00e1baf4313fd33a513251b494d2340e88a91b
SHA256

e57f42b4a9e3305785a2a6e1ffb14fa82d90d5094e8e5ecb3cd8fcb903637d92
SHA512

885dfaf6fd4c14dcfa223a7a8cb3258b4c81da589eacb5d2da5d4ffbeb594ec2c9483ab1d75fc7a9b6cd1567cf82f94ded18ace4e14540f2f48033eed2f16a44
SSDEEP

768:qu4f9TskvpDWUPlNxmo2qbebAN6JunAjZPIBj8wucDO30b9IxgaOMtV+rhG/BDZ3:qu4f9Tswb2FbNuA6BGgb9I6aH3+4Jdm2

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

23.94.99.6:6606

23.94.99.6:7707

23.94.99.6:8808

23.94.99.6:4782

Mutex

qdWLYmlsI9yW

Attributes

delay
3
install
true
install_file
required.exe
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

Processes:

resource	yara_rule
behavioral2/files/0x000a000000023b85-11.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

Processes:

updater.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	updater.exe

Executes dropped EXE 1 IoCs

Processes:

required.exe

pid	Process
4936	required.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 6 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

Processes:

cmd.execmd.exetimeout.exeschtasks.exerequired.exeupdater.exe

description	ioc	Process
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	required.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	updater.exe

Delays execution with timeout.exe 1 IoCs

evasion

Processes:

timeout.exe

pid	Process
1164	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

Processes:

schtasks.exe

pid	Process
2500	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

updater.exe

pid	Process
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe
4804	updater.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

updater.exerequired.exe

description	pid	Process
Token: SeDebugPrivilege	4804	updater.exe
Token: SeDebugPrivilege	4936	required.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

updater.execmd.execmd.exe

description	pid	Process	procid_target
PID 4804 wrote to memory of 4312	4804	updater.exe	86
PID 4804 wrote to memory of 4312	4804	updater.exe	86
PID 4804 wrote to memory of 4312	4804	updater.exe	86
PID 4804 wrote to memory of 2580	4804	updater.exe	88
PID 4804 wrote to memory of 2580	4804	updater.exe	88
PID 4804 wrote to memory of 2580	4804	updater.exe	88
PID 2580 wrote to memory of 1164	2580	cmd.exe	90
PID 2580 wrote to memory of 1164	2580	cmd.exe	90
PID 2580 wrote to memory of 1164	2580	cmd.exe	90
PID 4312 wrote to memory of 2500	4312	cmd.exe	91
PID 4312 wrote to memory of 2500	4312	cmd.exe	91
PID 4312 wrote to memory of 2500	4312	cmd.exe	91
PID 2580 wrote to memory of 4936	2580	cmd.exe	96
PID 2580 wrote to memory of 4936	2580	cmd.exe	96
PID 2580 wrote to memory of 4936	2580	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\MoonStealer-main\MoonStealer_assets\upx\updater.exe
"C:\Users\Admin\AppData\Local\Temp\MoonStealer-main\MoonStealer_assets\upx\updater.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4804
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "required" /tr '"C:\Users\Admin\AppData\Roaming\required.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4312
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "required" /tr '"C:\Users\Admin\AppData\Roaming\required.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2500
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9105.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2580
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1164
- - C:\Users\Admin\AppData\Roaming\required.exe
    "C:\Users\Admin\AppData\Roaming\required.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4936

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\tmp9105.tmp.bat

Filesize
152B

MD5
4dba8c26a65750fe726c864ae4d3ef45

SHA1
bfe72ddb668f6805a9961391e20e18b6cc89fb52

SHA256
3ee64c720135e3a593ee8152f9b98cdbfaf0423cc143d5f577c0a299484f3336

SHA512
eed9f8f6481d655cebd03c04435f714a71bb89710fa38695dd057f7e6192bec975142f02981b7625cf22b335bdb6e73db3b0a0f6ec38f722c1e5f64fe059f4e6

Download Submit
C:\Users\Admin\AppData\Roaming\required.exe

Filesize
48KB

MD5
403e30df6166df14523e6f820703241a

SHA1
9f00e1baf4313fd33a513251b494d2340e88a91b

SHA256
e57f42b4a9e3305785a2a6e1ffb14fa82d90d5094e8e5ecb3cd8fcb903637d92

SHA512
885dfaf6fd4c14dcfa223a7a8cb3258b4c81da589eacb5d2da5d4ffbeb594ec2c9483ab1d75fc7a9b6cd1567cf82f94ded18ace4e14540f2f48033eed2f16a44

Download Submit
memory/4804-0-0x00000000750EE000-0x00000000750EF000-memory.dmp

Filesize
4KB

Download
memory/4804-1-0x0000000000670000-0x0000000000682000-memory.dmp

Filesize
72KB

Download
memory/4804-2-0x00000000750E0000-0x0000000075890000-memory.dmp

Filesize
7.7MB

Download
memory/4804-3-0x0000000005070000-0x000000000510C000-memory.dmp

Filesize
624KB

Download
memory/4804-9-0x00000000750E0000-0x0000000075890000-memory.dmp

Filesize
7.7MB

Download
memory/4936-13-0x00000000750E0000-0x0000000075890000-memory.dmp

Filesize
7.7MB

Download
memory/4936-14-0x00000000750E0000-0x0000000075890000-memory.dmp

Filesize
7.7MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads