asyncrat | 49faef491cbfe43dd44266f822d744a9d5543fd01375c2b3d89fbe744ff7b400

General

Target

AsyncClient.exe
Size

47KB
MD5

f6093b7c45edb15a9d1bf77c5ea7fc6f
SHA1

eec1c1c523fe47fcba093c109c67320c38dc0db2
SHA256

49faef491cbfe43dd44266f822d744a9d5543fd01375c2b3d89fbe744ff7b400
SHA512

ba0a3f173c4e4927a581a2d2aa8a17340f0f0548c4311afe8d84183769978e81a3df1ce4525cd349455f7d6c197755871ddfa5eedd8111738e6dd76850608e73
SSDEEP

768:Nuu91TwQsOnFWUFN1/mo2qDaIvyP10ozjFz2PI87fl/nt0bCyJpBuaOk0KB07JDG:Nuu91TwSb231pZ/8LlCbCqcDgBYdQkdK

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

trip-thesaurus.gl.at.ply.gg:6606

trip-thesaurus.gl.at.ply.gg:8808

trip-thesaurus.gl.at.ply.gg:1337

Mutex

sk4bkiT4mXvt

Attributes

delay
3
install
true
install_file
edada.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/0x000300000001e754-11.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	AsyncClient.exe

Executes dropped EXE 1 IoCs

pid	Process
3588	edada.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	AsyncClient.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	edada.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2084	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
2876	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe
4456	AsyncClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4456	AsyncClient.exe
Token: SeDebugPrivilege	3588	edada.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 2108	4456	AsyncClient.exe	85
PID 4456 wrote to memory of 2108	4456	AsyncClient.exe	85
PID 4456 wrote to memory of 2108	4456	AsyncClient.exe	85
PID 4456 wrote to memory of 4464	4456	AsyncClient.exe	87
PID 4456 wrote to memory of 4464	4456	AsyncClient.exe	87
PID 4456 wrote to memory of 4464	4456	AsyncClient.exe	87
PID 2108 wrote to memory of 2876	2108	cmd.exe	89
PID 2108 wrote to memory of 2876	2108	cmd.exe	89
PID 2108 wrote to memory of 2876	2108	cmd.exe	89
PID 4464 wrote to memory of 2084	4464	cmd.exe	90
PID 4464 wrote to memory of 2084	4464	cmd.exe	90
PID 4464 wrote to memory of 2084	4464	cmd.exe	90
PID 4464 wrote to memory of 3588	4464	cmd.exe	93
PID 4464 wrote to memory of 3588	4464	cmd.exe	93
PID 4464 wrote to memory of 3588	4464	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4456
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "edada" /tr '"C:\Users\Admin\AppData\Roaming\edada.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2108
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "edada" /tr '"C:\Users\Admin\AppData\Roaming\edada.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2876
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3892.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4464
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2084
- - C:\Users\Admin\AppData\Roaming\edada.exe
    "C:\Users\Admin\AppData\Roaming\edada.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3588

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp3892.tmp.bat

Filesize
149B

MD5
88e50d2f799db470d610d803f171cb66

SHA1
898f78c4b866f6c246ddd559a83c8ba35759da2a

SHA256
8509525ba4172480a34d03b80eeef5518ba090f4520158349129e5b71022ae22

SHA512
8dd41a97dae623b2c93658c16629f920c05f8ffc2be968a4fe1f94c6c3b071ecebc921698c6cae57e6d7c4d9b08b3a9195ef7c1096ed148e6c116ad86970b1e8

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

Filesize
47KB

MD5
f6093b7c45edb15a9d1bf77c5ea7fc6f

SHA1
eec1c1c523fe47fcba093c109c67320c38dc0db2

SHA256
49faef491cbfe43dd44266f822d744a9d5543fd01375c2b3d89fbe744ff7b400

SHA512
ba0a3f173c4e4927a581a2d2aa8a17340f0f0548c4311afe8d84183769978e81a3df1ce4525cd349455f7d6c197755871ddfa5eedd8111738e6dd76850608e73

Download Submit
memory/3588-13-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/3588-14-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4456-0-0x0000000074A6E000-0x0000000074A6F000-memory.dmp

Filesize
4KB

Download
memory/4456-1-0x0000000000B40000-0x0000000000B52000-memory.dmp

Filesize
72KB

Download
memory/4456-2-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download
memory/4456-3-0x0000000005510000-0x00000000055AC000-memory.dmp

Filesize
624KB

Download
memory/4456-8-0x0000000074A60000-0x0000000075210000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads