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
behavioral3/files/0x001a00000002b68d-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
5976	Stub.exe
1424	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
2200	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
5048	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe
2512	tmpqusy2w21.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2512	tmpqusy2w21.exe
Token: SeDebugPrivilege	5976	Stub.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 2564	2512	tmpqusy2w21.exe	79
PID 2512 wrote to memory of 3504	2512	tmpqusy2w21.exe	81
PID 3504 wrote to memory of 2200	3504	cmd.exe	83
PID 2564 wrote to memory of 5048	2564	cmd.exe	84
PID 3504 wrote to memory of 1424	3504	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\tmpqusy2w21.exe
"C:\Users\Admin\AppData\Local\Temp\tmpqusy2w21.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2512
- 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:2564
- - 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:5048
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2277.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3504
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2200
- - 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:1424

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:5976

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

System Information Discovery

1

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

tmp2277.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp2277.tmp.bat
Size 148B
SHA256 68d824626b70115a601dc8ec417cefbf4815276a45ea3ab0eb6e738c89a7da23
MD5 cd70fc8e47e0ae037ec7e6a5044a565b
SHA1 95a695d6e256b5592976ec06bc82e6714ee756f0
SHA512 9b1a19e43c029fef72c6a08a18fdf57e1417d768b0e827c245d07f0f324746122ac9f1b2de55272e4aa96bc5c1501b1b66d4d448bfb7f5fa9b626bb797a67d88
TLSH
T1AFC02B4271C6FA5E3805145307FED48CD1736C593F84BF20D348440D1280448F0DA341
MD5 SHA1 SHA512 TLSH

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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/2512-0-0x0000000000240000-0x0000000000252000-memory.dmp

Download

memory/2512-1-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

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memory/2512-2-0x0000000004D60000-0x0000000004DFC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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