asyncrat | f95c8ace1331a172303a2f2cea8edc805203156e499012df465a158246495cce

General

Target

JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe
Size

609KB
MD5

2639445988d9173a2f4e1f95d3ab6062
SHA1

5469590c4a341104f6bab13f1b7b484d43b1d34d
SHA256

f95c8ace1331a172303a2f2cea8edc805203156e499012df465a158246495cce
SHA512

88b8d43d8d263ea9700a855606354eae0a496c9ff2f3e96398d607f0d81345b19a19bef0b1728d1828671ebe3563df891cdc62912b2fa9086615947a9f9bf5e1
SSDEEP

12288:sULh08OGQuZLvqJFTP2bvCuJsGx48vpnnuQsHhJfAUyfvq3:GnGQYTqaCCsGx48vJuQq

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

23.95.115.74:1465

23.95.115.74:1560

23.95.115.74:1148

23.95.115.74:1985

216.250.249.156:1465

216.250.249.156:1560

216.250.249.156:1148

216.250.249.156:1985

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
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

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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 780 set thread context of 220	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	103

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 3 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.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
764	schtasks.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 780 wrote to memory of 764	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	101
PID 780 wrote to memory of 764	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	101
PID 780 wrote to memory of 764	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	101
PID 780 wrote to memory of 220	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	103
PID 780 wrote to memory of 220	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	103
PID 780 wrote to memory of 220	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	103
PID 780 wrote to memory of 220	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	103
PID 780 wrote to memory of 220	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	103
PID 780 wrote to memory of 220	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	103
PID 780 wrote to memory of 220	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	103
PID 780 wrote to memory of 220	780	JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe	103

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:780
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QzNTNTgUgd" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2B70.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:764
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2639445988d9173a2f4e1f95d3ab6062.exe
  "{path}"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:220

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\tmp2B70.tmp

Filesize
1KB

MD5
a68ec3f919a4f29b87b0ed670118c3a4

SHA1
ed39ee52a8c6e195ca990359eacb805efa9ebfdc

SHA256
32838bfd3363af770e046841b4e625f721df9b2e949ed29fbcafbb82226332cd

SHA512
816af924c1d0c852b00f82e4911d730d27bb356e005771f82986ae3b46dea88aa564610f4cba3fcb3de2e7f9984235c036cdcef6f3963501640dca2f1677bcc3

Download Submit
memory/220-21-0x0000000074DB0000-0x0000000075560000-memory.dmp

Filesize
7.7MB

Download
memory/220-20-0x0000000074DB0000-0x0000000075560000-memory.dmp

Filesize
7.7MB

Download
memory/220-18-0x0000000074DB0000-0x0000000075560000-memory.dmp

Filesize
7.7MB

Download
memory/220-16-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/780-8-0x0000000005A80000-0x0000000005A94000-memory.dmp

Filesize
80KB

Download
memory/780-12-0x0000000006990000-0x00000000069A2000-memory.dmp

Filesize
72KB

Download
memory/780-7-0x0000000074DB0000-0x0000000075560000-memory.dmp

Filesize
7.7MB

Download
memory/780-0-0x0000000074DBE000-0x0000000074DBF000-memory.dmp

Filesize
4KB

Download
memory/780-9-0x0000000074DBE000-0x0000000074DBF000-memory.dmp

Filesize
4KB

Download
memory/780-10-0x0000000074DB0000-0x0000000075560000-memory.dmp

Filesize
7.7MB

Download
memory/780-11-0x0000000006910000-0x0000000006976000-memory.dmp

Filesize
408KB

Download
memory/780-6-0x00000000058E0000-0x0000000005936000-memory.dmp

Filesize
344KB

Download
memory/780-5-0x0000000005680000-0x000000000568A000-memory.dmp

Filesize
40KB

Download
memory/780-4-0x0000000005720000-0x00000000057B2000-memory.dmp

Filesize
584KB

Download
memory/780-3-0x0000000005C30000-0x00000000061D4000-memory.dmp

Filesize
5.6MB

Download
memory/780-19-0x0000000074DB0000-0x0000000075560000-memory.dmp

Filesize
7.7MB

Download
memory/780-2-0x00000000055A0000-0x000000000563C000-memory.dmp

Filesize
624KB

Download
memory/780-1-0x0000000000CD0000-0x0000000000D6E000-memory.dmp

Filesize
632KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads