asyncrat | 71ad0a40822aa8637e09f788efb4b8c11a151497f624947af9da9cb03bd8bbd8

General

Target

Syncing.exe
Size

48KB
MD5

6cf60ceb94a75a9fd3ef42ef53cecd12
SHA1

21e27216f1cbc2f707e922e0238a21aecae5b0fd
SHA256

71ad0a40822aa8637e09f788efb4b8c11a151497f624947af9da9cb03bd8bbd8
SHA512

9a2c23a7bcd6df0e44ccd1b4f43c9ff64640143974ff00381979f80101270c66b386c55709f4392638e51abef47debd40e1605e78b213bef0ba59b4d49b22236
SSDEEP

768:qu6XdTvER+SWUk6P4mo2qbUiZtX1uSK7PIk+BeNJN6U0br+UZToANniLlU09kDTU:qu6XdTv2S2K1yEk+yJCbr+mBipU09Wd0

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

185.223.30.86:8808

Mutex

GfuQDRCNZd5L

Attributes

delay
9
install
true
install_file
sync.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/0x0004000000004ed7-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2944	sync.exe

Loads dropped DLL 1 IoCs

pid	Process
2848	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	sync.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Syncing.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2868	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 3 IoCs

pid	Process
2064	Syncing.exe
2064	Syncing.exe
2064	Syncing.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2064	Syncing.exe
Token: SeDebugPrivilege	2944	sync.exe
Token: SeDebugPrivilege	2944	sync.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 2244	2064	Syncing.exe	32
PID 2064 wrote to memory of 2244	2064	Syncing.exe	32
PID 2064 wrote to memory of 2244	2064	Syncing.exe	32
PID 2064 wrote to memory of 2244	2064	Syncing.exe	32
PID 2064 wrote to memory of 2848	2064	Syncing.exe	34
PID 2064 wrote to memory of 2848	2064	Syncing.exe	34
PID 2064 wrote to memory of 2848	2064	Syncing.exe	34
PID 2064 wrote to memory of 2848	2064	Syncing.exe	34
PID 2244 wrote to memory of 2876	2244	cmd.exe	36
PID 2244 wrote to memory of 2876	2244	cmd.exe	36
PID 2244 wrote to memory of 2876	2244	cmd.exe	36
PID 2244 wrote to memory of 2876	2244	cmd.exe	36
PID 2848 wrote to memory of 2868	2848	cmd.exe	37
PID 2848 wrote to memory of 2868	2848	cmd.exe	37
PID 2848 wrote to memory of 2868	2848	cmd.exe	37
PID 2848 wrote to memory of 2868	2848	cmd.exe	37
PID 2848 wrote to memory of 2944	2848	cmd.exe	38
PID 2848 wrote to memory of 2944	2848	cmd.exe	38
PID 2848 wrote to memory of 2944	2848	cmd.exe	38
PID 2848 wrote to memory of 2944	2848	cmd.exe	38

C:\Users\Admin\AppData\Local\Temp\Syncing.exe
"C:\Users\Admin\AppData\Local\Temp\Syncing.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2064
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "sync" /tr '"C:\Users\Admin\AppData\Roaming\sync.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2244
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "sync" /tr '"C:\Users\Admin\AppData\Roaming\sync.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2876
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpEB49.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2848
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2868
- - C:\Users\Admin\AppData\Roaming\sync.exe
    "C:\Users\Admin\AppData\Roaming\sync.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2944

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\tmpEB49.tmp.bat

Filesize
148B

MD5
2969fdf256f4374979ad1750db933eae

SHA1
19ce3b4734b1e68fdb861d2e79c58691c121c0b2

SHA256
de9b59940c7069e47ba093a606322fc092339be79a5ec61f263c69004a1f3fc0

SHA512
238d55bb682660e0be7df7edb07d343a43d1eeb740e0155e67b11b614746d695d719dc00e196b0e9a74bae9d73111a63295614d1d0c52acb49ffde9ddfcb49d4

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

Filesize
48KB

MD5
6cf60ceb94a75a9fd3ef42ef53cecd12

SHA1
21e27216f1cbc2f707e922e0238a21aecae5b0fd

SHA256
71ad0a40822aa8637e09f788efb4b8c11a151497f624947af9da9cb03bd8bbd8

SHA512
9a2c23a7bcd6df0e44ccd1b4f43c9ff64640143974ff00381979f80101270c66b386c55709f4392638e51abef47debd40e1605e78b213bef0ba59b4d49b22236

Download Submit
memory/2064-0-0x0000000073FAE000-0x0000000073FAF000-memory.dmp

Filesize
4KB

Download
memory/2064-1-0x0000000001040000-0x0000000001052000-memory.dmp

Filesize
72KB

Download
memory/2064-2-0x0000000073FA0000-0x000000007468E000-memory.dmp

Filesize
6.9MB

Download
memory/2064-11-0x0000000073FA0000-0x000000007468E000-memory.dmp

Filesize
6.9MB

Download
memory/2944-16-0x0000000000200000-0x0000000000212000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads