asyncrat | 9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed

General

Target

9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
Size

238KB
MD5

9d1e589ea8c4b3c59d3fb46afa940da5
SHA1

817bf841284e0279d15cb27f73a0939344dfb811
SHA256

9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed
SHA512

a7db38a58cf9580c987fe6c3293dc279a67458850862d86d0cc60fb7c9213bf92311be2a8ac44ae055fd24619df8f76d33f32835a254d386e4e53e2602d63ac2
SSDEEP

3072:/Yzwrq5J9SwHMFF9Kw/kxLk42s/8Y31/Yvi9GA54IkMwP5gMTmmsolNIrRuw+mqM:A9zHMFF9KxLp8YFgvwmZrTmDAN

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

54.253.7.109:4447

Mutex

XqcNee3124zJ

Attributes

delay
21
install
true
install_file
service.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 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4640-2-0x0000000002490000-0x00000000024A2000-memory.dmp	family_asyncrat
behavioral2/memory/1976-16-0x0000000002920000-0x0000000002932000-memory.dmp	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:

9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe

Executes dropped EXE 1 IoCs

Processes:

service.exe

pid	Process
1976	service.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:

schtasks.exeservice.exe9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.execmd.execmd.exetimeout.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.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

Delays execution with timeout.exe 1 IoCs

evasion

Processes:

timeout.exe

pid	Process
3828	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
2152	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe

pid	Process
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exeservice.exe

description	pid	Process
Token: SeDebugPrivilege	4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
Token: SeDebugPrivilege	1976	service.exe
Token: SeDebugPrivilege	1976	service.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.execmd.execmd.exe

description	pid	Process	procid_target
PID 4640 wrote to memory of 2064	4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe	97
PID 4640 wrote to memory of 2064	4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe	97
PID 4640 wrote to memory of 2064	4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe	97
PID 4640 wrote to memory of 2836	4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe	99
PID 4640 wrote to memory of 2836	4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe	99
PID 4640 wrote to memory of 2836	4640	9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe	99
PID 2064 wrote to memory of 2152	2064	cmd.exe	101
PID 2064 wrote to memory of 2152	2064	cmd.exe	101
PID 2064 wrote to memory of 2152	2064	cmd.exe	101
PID 2836 wrote to memory of 3828	2836	cmd.exe	102
PID 2836 wrote to memory of 3828	2836	cmd.exe	102
PID 2836 wrote to memory of 3828	2836	cmd.exe	102
PID 2836 wrote to memory of 1976	2836	cmd.exe	104
PID 2836 wrote to memory of 1976	2836	cmd.exe	104
PID 2836 wrote to memory of 1976	2836	cmd.exe	104

C:\Users\Admin\AppData\Local\Temp\9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe
"C:\Users\Admin\AppData\Local\Temp\9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4640
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Roaming\service.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2064
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Roaming\service.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2152
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD35D.tmp.bat""
  2⤵
  - 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:3828
- - C:\Users\Admin\AppData\Roaming\service.exe
    "C:\Users\Admin\AppData\Roaming\service.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1976

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpD35D.tmp.bat

Filesize
151B

MD5
c192ce791c5e1707bb5b1f811b45e8a0

SHA1
ad32a5c7a2570d75783521e1355c9cdbf64c7c0a

SHA256
f8f92c2d3bf55ca6d7ca522a14eb601e979a67ca1bd369f009c9d683dd923b7b

SHA512
02cb33742262487c5dd90be9df941051851920b194c9c779388ba2b04cf18c8bfb9a10447bff61b422f35670a8cf5a44b05a4bca90269009ff1686dce427487f

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

Filesize
238KB

MD5
9d1e589ea8c4b3c59d3fb46afa940da5

SHA1
817bf841284e0279d15cb27f73a0939344dfb811

SHA256
9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed

SHA512
a7db38a58cf9580c987fe6c3293dc279a67458850862d86d0cc60fb7c9213bf92311be2a8ac44ae055fd24619df8f76d33f32835a254d386e4e53e2602d63ac2

Download Submit
memory/1976-18-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/1976-17-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/1976-16-0x0000000002920000-0x0000000002932000-memory.dmp

Filesize
72KB

Download
memory/4640-3-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

Filesize
4KB

Download
memory/4640-6-0x00000000052B0000-0x000000000534C000-memory.dmp

Filesize
624KB

Download
memory/4640-5-0x0000000004A20000-0x0000000004A86000-memory.dmp

Filesize
408KB

Download
memory/4640-12-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/4640-4-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/4640-0-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

Filesize
4KB

Download
memory/4640-2-0x0000000002490000-0x00000000024A2000-memory.dmp

Filesize
72KB

Download
memory/4640-1-0x0000000000050000-0x0000000000092000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads