asyncrat | 18ed10ae7b3ed84595be2e012aa64544ba5751eca4edfa310d7de939f75e822f

General

Target

SolaraB2.exe
Size

48KB
MD5

71fe70139bb3fc78601c7c3da0df9cb2
SHA1

ed8a1fb5abd05d948d9adb4a8257788b768e3d38
SHA256

18ed10ae7b3ed84595be2e012aa64544ba5751eca4edfa310d7de939f75e822f
SHA512

173a90f29874165342764835bd25d3c10dd27f615015104367897a9a50ce4a5ddc9880e6468df7ccedcf6cf2d3f6a9c26d492b5a5dade8c8b0e9795b82c53f30
SSDEEP

768:euir1TUEFSuWUoV3kmo2qzHl7VZcJIPIKamfZ0bn9bmIA5WS9bdXm2BDZzN:euir1TUKP28cJtKa6ebnQbWmb9mYdzN

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

Mutex

R3dAGQsLxm1j

Attributes

delay
3
install
true
install_file
solara.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

resource	yara_rule
behavioral1/files/0x000d000000012280-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2548	solara.exe

Loads dropped DLL 1 IoCs

pid	Process
2836	cmd.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SolaraB2.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	solara.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2920	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
2900	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1268	SolaraB2.exe
1268	SolaraB2.exe
1268	SolaraB2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1268	SolaraB2.exe
Token: SeDebugPrivilege	2548	solara.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1268 wrote to memory of 2524	1268	SolaraB2.exe	32
PID 1268 wrote to memory of 2524	1268	SolaraB2.exe	32
PID 1268 wrote to memory of 2524	1268	SolaraB2.exe	32
PID 1268 wrote to memory of 2524	1268	SolaraB2.exe	32
PID 1268 wrote to memory of 2836	1268	SolaraB2.exe	34
PID 1268 wrote to memory of 2836	1268	SolaraB2.exe	34
PID 1268 wrote to memory of 2836	1268	SolaraB2.exe	34
PID 1268 wrote to memory of 2836	1268	SolaraB2.exe	34
PID 2524 wrote to memory of 2900	2524	cmd.exe	36
PID 2524 wrote to memory of 2900	2524	cmd.exe	36
PID 2524 wrote to memory of 2900	2524	cmd.exe	36
PID 2524 wrote to memory of 2900	2524	cmd.exe	36
PID 2836 wrote to memory of 2920	2836	cmd.exe	37
PID 2836 wrote to memory of 2920	2836	cmd.exe	37
PID 2836 wrote to memory of 2920	2836	cmd.exe	37
PID 2836 wrote to memory of 2920	2836	cmd.exe	37
PID 2836 wrote to memory of 2548	2836	cmd.exe	38
PID 2836 wrote to memory of 2548	2836	cmd.exe	38
PID 2836 wrote to memory of 2548	2836	cmd.exe	38
PID 2836 wrote to memory of 2548	2836	cmd.exe	38

C:\Users\Admin\AppData\Local\Temp\SolaraB2.exe
"C:\Users\Admin\AppData\Local\Temp\SolaraB2.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1268
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "solara" /tr '"C:\Users\Admin\AppData\Roaming\solara.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2524
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "solara" /tr '"C:\Users\Admin\AppData\Roaming\solara.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2900
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpE0CE.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2836
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2920
- - C:\Users\Admin\AppData\Roaming\solara.exe
    "C:\Users\Admin\AppData\Roaming\solara.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2548

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

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

C:\Users\Admin\AppData\Local\Temp\tmpE0CE.tmp.bat

Filesize
150B

MD5
9f233a027a7d991e99470ad8958c8752

SHA1
bcb2bdd1a24631fac1c86ab2ea1922afdcad60eb

SHA256
34d4bb02e7f08b933971b327400c3d8305ffb7f61c2cd7bf6a774974f2ce1f1e

SHA512
7ce1a9847147e2808c1b3de32e51da854dae514a5b48885473006a32ed5675e0bc6c7094d6085af4013a5880135babcfc3f5bcb8d20bf7bea736ec1871158620

Download Submit
\Users\Admin\AppData\Roaming\solara.exe

Filesize
48KB

MD5
71fe70139bb3fc78601c7c3da0df9cb2

SHA1
ed8a1fb5abd05d948d9adb4a8257788b768e3d38

SHA256
18ed10ae7b3ed84595be2e012aa64544ba5751eca4edfa310d7de939f75e822f

SHA512
173a90f29874165342764835bd25d3c10dd27f615015104367897a9a50ce4a5ddc9880e6468df7ccedcf6cf2d3f6a9c26d492b5a5dade8c8b0e9795b82c53f30

Download Submit
memory/1268-0-0x0000000074B0E000-0x0000000074B0F000-memory.dmp

Filesize
4KB

Download
memory/1268-1-0x0000000000140000-0x0000000000152000-memory.dmp

Filesize
72KB

Download
memory/1268-2-0x0000000074B00000-0x00000000751EE000-memory.dmp

Filesize
6.9MB

Download
memory/1268-12-0x0000000074B00000-0x00000000751EE000-memory.dmp

Filesize
6.9MB

Download
memory/2548-16-0x0000000001220000-0x0000000001232000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads