asyncrat | dcaf6810871062a1a5a292c8e46667a8b7de908d292513ef1c443929ce8897c5

General

Target

68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe
Size

45KB
MD5

68d23586eef34a76a3e58cfc1bfdcb80
SHA1

7218ab8b9e02553b466361c043caa09a350e42b2
SHA256

dcaf6810871062a1a5a292c8e46667a8b7de908d292513ef1c443929ce8897c5
SHA512

20c09977afc6d0d787b481274ec7db6110691d342dbb25ddf9408a5e8a853cf79ff158e9552239d71fa4aafd247e72fdac0f653c92346945c8fbb84252cd72e3
SSDEEP

768:nugaNTokqd97WUHgAKpmo2q7HKjGKG6PIyzjbFgX3iUaLtlW8XHBWBDZ/x:nugaNToTdQT2mKYDy3bCXSFtl5x4d/x

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:4444

127.0.0.1:16155

127.0.0.1:15558

2.tcp.eu.ngrok.io:6606

2.tcp.eu.ngrok.io:7707

2.tcp.eu.ngrok.io:8808

2.tcp.eu.ngrok.io:4444

2.tcp.eu.ngrok.io:16155

2.tcp.eu.ngrok.io:15558

Mutex

Mutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
MicrosoftService.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/0x000900000001225f-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2892	MicrosoftService.exe

Loads dropped DLL 1 IoCs

pid	Process
2072	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
5	2.tcp.eu.ngrok.io
10	2.tcp.eu.ngrok.io

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	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftService.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1852	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
2724	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe
2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe
2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe
Token: SeDebugPrivilege	2892	MicrosoftService.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2120 wrote to memory of 2376	2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2376	2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2376	2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2376	2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2072	2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe	32
PID 2120 wrote to memory of 2072	2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe	32
PID 2120 wrote to memory of 2072	2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe	32
PID 2120 wrote to memory of 2072	2120	68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe	32
PID 2072 wrote to memory of 1852	2072	cmd.exe	34
PID 2072 wrote to memory of 1852	2072	cmd.exe	34
PID 2072 wrote to memory of 1852	2072	cmd.exe	34
PID 2072 wrote to memory of 1852	2072	cmd.exe	34
PID 2376 wrote to memory of 2724	2376	cmd.exe	35
PID 2376 wrote to memory of 2724	2376	cmd.exe	35
PID 2376 wrote to memory of 2724	2376	cmd.exe	35
PID 2376 wrote to memory of 2724	2376	cmd.exe	35
PID 2072 wrote to memory of 2892	2072	cmd.exe	36
PID 2072 wrote to memory of 2892	2072	cmd.exe	36
PID 2072 wrote to memory of 2892	2072	cmd.exe	36
PID 2072 wrote to memory of 2892	2072	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\68d23586eef34a76a3e58cfc1bfdcb80_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2120
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "MicrosoftService" /tr '"C:\Users\Admin\AppData\Roaming\MicrosoftService.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2376
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "MicrosoftService" /tr '"C:\Users\Admin\AppData\Roaming\MicrosoftService.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2724
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp9EEE.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2072
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1852
- - C:\Users\Admin\AppData\Roaming\MicrosoftService.exe
    "C:\Users\Admin\AppData\Roaming\MicrosoftService.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2892

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9EEE.tmp.bat

Filesize
160B

MD5
098bc900173b5c23fce1724a9db5035a

SHA1
6e8672f78773f4b04b0844c70ad88cf050674a5c

SHA256
3029ae3d29586c97e55785d202696eae1c187ecb2d48c23e3e747c63484d0ce9

SHA512
1f56a6abb93ec0e00e88b5878d28c72e4bd18aa9746384fae37c89b43cd21e6408c19c9da0f8a1d48f00d0492b7646bd7c3f30b3f8b7966035edecfbd8c52df3

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

Filesize
45KB

MD5
68d23586eef34a76a3e58cfc1bfdcb80

SHA1
7218ab8b9e02553b466361c043caa09a350e42b2

SHA256
dcaf6810871062a1a5a292c8e46667a8b7de908d292513ef1c443929ce8897c5

SHA512
20c09977afc6d0d787b481274ec7db6110691d342dbb25ddf9408a5e8a853cf79ff158e9552239d71fa4aafd247e72fdac0f653c92346945c8fbb84252cd72e3

Download Submit
memory/2120-0-0x000000007450E000-0x000000007450F000-memory.dmp

Filesize
4KB

Download
memory/2120-1-0x0000000000DB0000-0x0000000000DC2000-memory.dmp

Filesize
72KB

Download
memory/2120-2-0x0000000074500000-0x0000000074BEE000-memory.dmp

Filesize
6.9MB

Download
memory/2120-11-0x0000000074500000-0x0000000074BEE000-memory.dmp

Filesize
6.9MB

Download
memory/2892-16-0x0000000000940000-0x0000000000952000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads