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
behavioral2/files/0x000800000002440c-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-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	tmpqusy2w21.exe

Executes dropped EXE 2 IoCs

pid	Process
536	Stub.exe
4336	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
1800	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
4148	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe
1684	tmpqusy2w21.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1684	tmpqusy2w21.exe
Token: SeDebugPrivilege	536	Stub.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1684 wrote to memory of 1812	1684	tmpqusy2w21.exe	90
PID 1684 wrote to memory of 3804	1684	tmpqusy2w21.exe	92
PID 3804 wrote to memory of 1800	3804	cmd.exe	94
PID 1812 wrote to memory of 4148	1812	cmd.exe	95
PID 3804 wrote to memory of 4336	3804	cmd.exe	98

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:1684
- 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:1812
- - 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:4148
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp650E.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3804
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1800
- - 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:4336

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:536

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

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Downloads

tmp650E.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp650E.tmp.bat
Size 148B
SHA256 633a6f425cf0577b2399b28dfb09a876edecc29569770588812f093ca46871e8
MD5 d5998ea780c25d2a9bf9bfd831e41f32
SHA1 33f00d9ccbfaf051fd009b1cef2ac3b7d85c534f
SHA512 f3bebc9f22859423bfd66a8d5e8c323d41223c5b8dacf4c276d43c4326aefb9b85652147cc0e5fcd87186403cb7a863e18bba81133683859579093af69185724
TLSH
T133C02B4261C5EA4F3845145306FFD98CD1737C693F40BF10D748440D1280C4CF0D9341
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/1684-0-0x00000000009B0000-0x00000000009C2000-memory.dmp

Download

memory/1684-1-0x0000000005170000-0x0000000005180000-memory.dmp

Download

memory/1684-2-0x0000000005230000-0x00000000052CC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads