asyncrat | 6d42ab03dc8bf128ef84fd8c6a33b113ac9961077f72ab94a353a5e4f05aac61

General

Target

JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe
Size

71KB
MD5

fcf393b445d4f0b001d53e097db8e5fe
SHA1

8c46fdbab506cd8aa5cdec4a6347e9c655c387e3
SHA256

6d42ab03dc8bf128ef84fd8c6a33b113ac9961077f72ab94a353a5e4f05aac61
SHA512

d30371c10b63ce8a9649de204e19769f22b0e9c1a15938418556e79c4df2d80e72322f24afcfe5c0f2a6b02663c174c76f0e0c6c4bd923c1cf1f5b1e3fb4eacb
SSDEEP

1536:H9WXJ4FGFYQRVU6EkaS3Ystx7Adpf7PS5TSVHbFqZKdMF/gTwHMBy:UAw26Eka1sLeZ7PS5TSdFqZFoE

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

remalarm.ddns.net:6606

remalarm.ddns.net:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
10
install
true
install_file
Test.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

resource	yara_rule
behavioral1/memory/432-4-0x0000000000250000-0x0000000000262000-memory.dmp	family_asyncrat
behavioral1/memory/2712-22-0x0000000000680000-0x0000000000692000-memory.dmp	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2712	Test.exe

Loads dropped DLL 1 IoCs

pid	Process
2968	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	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.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	Test.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2560	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
2824	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
432	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	432	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe
Token: SeDebugPrivilege	2712	Test.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 432 wrote to memory of 2832	432	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe	29
PID 432 wrote to memory of 2832	432	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe	29
PID 432 wrote to memory of 2832	432	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe	29
PID 432 wrote to memory of 2832	432	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe	29
PID 432 wrote to memory of 2968	432	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe	31
PID 432 wrote to memory of 2968	432	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe	31
PID 432 wrote to memory of 2968	432	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe	31
PID 432 wrote to memory of 2968	432	JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe	31
PID 2832 wrote to memory of 2824	2832	cmd.exe	33
PID 2832 wrote to memory of 2824	2832	cmd.exe	33
PID 2832 wrote to memory of 2824	2832	cmd.exe	33
PID 2832 wrote to memory of 2824	2832	cmd.exe	33
PID 2968 wrote to memory of 2560	2968	cmd.exe	34
PID 2968 wrote to memory of 2560	2968	cmd.exe	34
PID 2968 wrote to memory of 2560	2968	cmd.exe	34
PID 2968 wrote to memory of 2560	2968	cmd.exe	34
PID 2968 wrote to memory of 2712	2968	cmd.exe	35
PID 2968 wrote to memory of 2712	2968	cmd.exe	35
PID 2968 wrote to memory of 2712	2968	cmd.exe	35
PID 2968 wrote to memory of 2712	2968	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:432
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Test" /tr '"C:\Users\Admin\AppData\Roaming\Test.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2832
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Test" /tr '"C:\Users\Admin\AppData\Roaming\Test.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2824
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp5A6F.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2968
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2560
- - C:\Users\Admin\AppData\Roaming\Test.exe
    "C:\Users\Admin\AppData\Roaming\Test.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2712

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\tmp5A6F.tmp.bat

Filesize
148B

MD5
3576be8acf08876d0c19751cbff68321

SHA1
25eb33b81340d167d8b1943b0e9d225d1a9ad5ec

SHA256
59e1a68cc88d36d6b10715bf5cf603560a29372f451f9b908f32e36c757c30e1

SHA512
a4699ff37e5de9df12e08d91b05151baaebc40552a279814781f9ea33594eeb37ecde9ce4d410d2f200606840e4280cebf89a9f20c0b68f31fff5d7f0877bab9

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

Filesize
71KB

MD5
fcf393b445d4f0b001d53e097db8e5fe

SHA1
8c46fdbab506cd8aa5cdec4a6347e9c655c387e3

SHA256
6d42ab03dc8bf128ef84fd8c6a33b113ac9961077f72ab94a353a5e4f05aac61

SHA512
d30371c10b63ce8a9649de204e19769f22b0e9c1a15938418556e79c4df2d80e72322f24afcfe5c0f2a6b02663c174c76f0e0c6c4bd923c1cf1f5b1e3fb4eacb

Download Submit
memory/432-6-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/432-3-0x00000000001F0000-0x00000000001F6000-memory.dmp

Filesize
24KB

Download
memory/432-4-0x0000000000250000-0x0000000000262000-memory.dmp

Filesize
72KB

Download
memory/432-5-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/432-0-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/432-7-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/432-2-0x0000000000370000-0x000000000039C000-memory.dmp

Filesize
176KB

Download
memory/432-17-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/432-1-0x0000000000350000-0x0000000000368000-memory.dmp

Filesize
96KB

Download
memory/2712-21-0x0000000000F50000-0x0000000000F68000-memory.dmp

Filesize
96KB

Download
memory/2712-22-0x0000000000680000-0x0000000000692000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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