asyncrat | 0f07d465b2fb93b367ff2a393574f87b932e4627591091bf8f2f94d3c8e75715

General

Target

556407eba4cd85a57fdb6dcdb12e2269.exe
Size

45KB
MD5

556407eba4cd85a57fdb6dcdb12e2269
SHA1

d68a0f0831556c4ef3fb3e003385e897a210b751
SHA256

0f07d465b2fb93b367ff2a393574f87b932e4627591091bf8f2f94d3c8e75715
SHA512

d7baa345dac09eb418604a3d6ace4af0a54cb2b5a627967bc9ccdbb5ee5021ef6dd1e042fcc4165aeb5a38f8583af56f99e5472fa1442ee0335cf62e9664c6c0
SSDEEP

768:uuokxmFTkUE1YAgWUOl1nyamo2qR+1uGJAIGYPPI3njbMgX3iWHCHiGTCE2BDZax:uuokxmFTkUMYi1t2HsNx3jbDXSWHnGm0

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

193.23.160.13:7707

Mutex

zTAsGorHPqSl

Attributes

delay
3
install
true
install_file
Server-Host.exe
install_folder
%AppData%

aes.plain

Signatures

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
behavioral1/files/0x000700000001211b-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2300	Server-Host.exe

Loads dropped DLL 1 IoCs

pid	Process
2592	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	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	Server-Host.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	556407eba4cd85a57fdb6dcdb12e2269.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1932	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
2660	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2808	556407eba4cd85a57fdb6dcdb12e2269.exe
2808	556407eba4cd85a57fdb6dcdb12e2269.exe
2808	556407eba4cd85a57fdb6dcdb12e2269.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2808	556407eba4cd85a57fdb6dcdb12e2269.exe
Token: SeDebugPrivilege	2300	Server-Host.exe
Token: SeDebugPrivilege	2300	Server-Host.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 2272	2808	556407eba4cd85a57fdb6dcdb12e2269.exe	31
PID 2808 wrote to memory of 2272	2808	556407eba4cd85a57fdb6dcdb12e2269.exe	31
PID 2808 wrote to memory of 2272	2808	556407eba4cd85a57fdb6dcdb12e2269.exe	31
PID 2808 wrote to memory of 2272	2808	556407eba4cd85a57fdb6dcdb12e2269.exe	31
PID 2808 wrote to memory of 2592	2808	556407eba4cd85a57fdb6dcdb12e2269.exe	33
PID 2808 wrote to memory of 2592	2808	556407eba4cd85a57fdb6dcdb12e2269.exe	33
PID 2808 wrote to memory of 2592	2808	556407eba4cd85a57fdb6dcdb12e2269.exe	33
PID 2808 wrote to memory of 2592	2808	556407eba4cd85a57fdb6dcdb12e2269.exe	33
PID 2272 wrote to memory of 2660	2272	cmd.exe	35
PID 2272 wrote to memory of 2660	2272	cmd.exe	35
PID 2272 wrote to memory of 2660	2272	cmd.exe	35
PID 2272 wrote to memory of 2660	2272	cmd.exe	35
PID 2592 wrote to memory of 1932	2592	cmd.exe	36
PID 2592 wrote to memory of 1932	2592	cmd.exe	36
PID 2592 wrote to memory of 1932	2592	cmd.exe	36
PID 2592 wrote to memory of 1932	2592	cmd.exe	36
PID 2592 wrote to memory of 2300	2592	cmd.exe	37
PID 2592 wrote to memory of 2300	2592	cmd.exe	37
PID 2592 wrote to memory of 2300	2592	cmd.exe	37
PID 2592 wrote to memory of 2300	2592	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\556407eba4cd85a57fdb6dcdb12e2269.exe
"C:\Users\Admin\AppData\Local\Temp\556407eba4cd85a57fdb6dcdb12e2269.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Server-Host" /tr '"C:\Users\Admin\AppData\Roaming\Server-Host.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2272
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Server-Host" /tr '"C:\Users\Admin\AppData\Roaming\Server-Host.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2660
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp81EC.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2592
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1932
- - C:\Users\Admin\AppData\Roaming\Server-Host.exe
    "C:\Users\Admin\AppData\Roaming\Server-Host.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2300

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\Cab9EB1.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp81EC.tmp.bat

Filesize
155B

MD5
11e7ff2266e7e784f1ffb6264c551e0e

SHA1
ab26ec882aaac7bb2bff84668f5f69ce5cc595a1

SHA256
1a502b891b76390b136938e08790c357d781d93f5cdf0d65c414ffc06dcfd587

SHA512
868fe79fb29d8bcc28f7ec6fd207de6625ac2957de616511392e0f60ddb2036088e263910dee717931f81bc84d364f1fa2c0788680fa3be2194dfcc42fe227af

Download Submit
C:\Users\Admin\AppData\Roaming\Server-Host.exe

Filesize
45KB

MD5
556407eba4cd85a57fdb6dcdb12e2269

SHA1
d68a0f0831556c4ef3fb3e003385e897a210b751

SHA256
0f07d465b2fb93b367ff2a393574f87b932e4627591091bf8f2f94d3c8e75715

SHA512
d7baa345dac09eb418604a3d6ace4af0a54cb2b5a627967bc9ccdbb5ee5021ef6dd1e042fcc4165aeb5a38f8583af56f99e5472fa1442ee0335cf62e9664c6c0

Download Submit
memory/2300-16-0x00000000003C0000-0x00000000003D2000-memory.dmp

Filesize
72KB

Download
memory/2808-0-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/2808-1-0x0000000001200000-0x0000000001212000-memory.dmp

Filesize
72KB

Download
memory/2808-2-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/2808-12-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads