asyncrat | 4d25ec4a14aa82e83e49b9ac84d75c0a355d484c5e79beba1afca7da45c0b154

General

Target
tmpqusy2w21.exe
Size 48KB
Sample260602-kzqnnshv21
SHA256 4d25ec4a14aa82e83e49b9ac84d75c0a355d484c5e79beba1afca7da45c0b154
MD5 b1af9d054f39b532c2cdcca5f0eeefaf
SHA1 102623d81f19c786471413c61ce1459673982087
SHA512 c852af403f7a261c8e28179cf9262cc12dbd0fd9d7735f73213e92587b1c7aebb7276da4e8c3c34a7e0cf8f07adeffbfa684ea0410808f1e245be543e28e6b65
SSDEEP 768:ha79mL/hq8xv4w4Ggx8zaMEmid7Ilni6VJX1PwLH0bxmD5oKsVX9KezRmMomM5ba:ha79mNdeaPBwobxm1ZyRFPM5brf+
TLSH
T110235C002BA9822AF27D4F74A9F33245857AF6533607DA4D1CC412DA6713FC29B426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

clipphimsex3x.net:6606
clipphimsex3x.net:7707
clipphimsex3x.net:8808
www.clipphimsex3x.net:6606
www.clipphimsex3x.net:7707
www.clipphimsex3x.net:8808
malware.clipphimsex3x.net:6606
malware.clipphimsex3x.net:7707
malware.clipphimsex3x.net:8808

Mutex

ZpBvoNOpEJJp

Attributes

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

aes.plain

Signatures

Family: 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/0x00080000000286b0-8.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-1-5-21-1131776342-1023621610-2767477260-1000\Control Panel\International\Geo\Nation	tmpqusy2w21.exe

Executes dropped EXE 2 IoCs

pid	Process
6024	Stub.exe
4784	Stub.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 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	tmpqusy2w21.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	Stub.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Stub.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4772	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
4740	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe
4644	tmpqusy2w21.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4644	tmpqusy2w21.exe
Token: SeDebugPrivilege	6024	Stub.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4644 wrote to memory of 4268	4644	tmpqusy2w21.exe	82
PID 4644 wrote to memory of 5536	4644	tmpqusy2w21.exe	84
PID 5536 wrote to memory of 4772	5536	cmd.exe	86
PID 4268 wrote to memory of 4740	4268	cmd.exe	87
PID 5536 wrote to memory of 4784	5536	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\tmpqusy2w21.exe
"C:\Users\Admin\AppData\Local\Temp\tmpqusy2w21.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4644
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Stub" /tr '"C:\Users\Admin\AppData\Roaming\Stub.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4268
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Stub" /tr '"C:\Users\Admin\AppData\Roaming\Stub.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4740
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3534.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5536
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4772
- - C:\Users\Admin\AppData\Roaming\Stub.exe
    "C:\Users\Admin\AppData\Roaming\Stub.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4784

C:\Users\Admin\AppData\Roaming\Stub.exe
"C:\Users\Admin\AppData\Roaming\Stub.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:6024

Network

MITRE ATT&CK Enterprise v16

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

Replay Monitor

Loading Replay Monitor...

Downloads

tmp3534.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3534.tmp.bat
Size 148B
SHA256 b3373b1f1f71761951658fdef74b3ad3bf6a941194da8adef3a6c25f6b93f191
MD5 23b47a4b3949d77cd72e098e47688740
SHA1 c4ba15798c0f0f3e5faab00f302f46de959cd375
SHA512 2b3faa2dbf1c0c2be8a4f6cc37375214dc62c91e3bb609ff87ac5d8474eb10b51fe1656850491c43bb964c85e5032e9a44de8ed74f5b10020c332c65178e93d8
TLSH
T1DFC02B8261C5EA9E3D05145306FED48CD1737C593F40BF10D348440E2281C49F0DA345
MD5 SHA1 SHA512 TLSH

Submit Download

Stub.exe

Path C:\Users\Admin\AppData\Roaming\Stub.exe
Size 48KB
SHA256 4d25ec4a14aa82e83e49b9ac84d75c0a355d484c5e79beba1afca7da45c0b154
MD5 b1af9d054f39b532c2cdcca5f0eeefaf
SHA1 102623d81f19c786471413c61ce1459673982087
SHA512 c852af403f7a261c8e28179cf9262cc12dbd0fd9d7735f73213e92587b1c7aebb7276da4e8c3c34a7e0cf8f07adeffbfa684ea0410808f1e245be543e28e6b65
SSDEEP 768:ha79mL/hq8xv4w4Ggx8zaMEmid7Ilni6VJX1PwLH0bxmD5oKsVX9KezRmMomM5ba:ha79mNdeaPBwobxm1ZyRFPM5brf+
TLSH
T110235C002BA9822AF27D4F74A9F33245857AF6533607DA4D1CC412DA6713FC29B426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4644-0-0x0000000000B70000-0x0000000000B82000-memory.dmp

Download

memory/4644-1-0x0000000005640000-0x0000000005650000-memory.dmp

Download

memory/4644-2-0x0000000005520000-0x00000000055BC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads