asyncrat | 1858aba49bc3b6bc7df3c70d3e70f3c14c747d5b267d2be366220c3c300219ca

General

Target

761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe
Size

512KB
MD5

761e34c09293f429b26fa9b08a942746
SHA1

f9e8888673dd7465dcf633c6b711d99f4bd9f678
SHA256

1858aba49bc3b6bc7df3c70d3e70f3c14c747d5b267d2be366220c3c300219ca
SHA512

2412b933d2544561bb3fd567e2c0d369a6c3532c7cdceacace19b0d86477e7ea0b947a3de63a7ec2e9589c041c457ecdb00abae0e378e6a1060faaeb5cac53c3
SSDEEP

12288:/yHANgm25FmSEd5xO3onVmpOTq5rBByho7:/bgiS5NE

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

severdops.ddns.net:6204

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

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-1-5-21-1705699165-553239100-4129523827-1000\Control Panel\International\Geo\Nation	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3352 set thread context of 2044	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	108

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	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	761e34c09293f429b26fa9b08a942746_JaffaCakes118.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
5064	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe
3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3352 wrote to memory of 5064	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	105
PID 3352 wrote to memory of 5064	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	105
PID 3352 wrote to memory of 5064	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	105
PID 3352 wrote to memory of 4716	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	107
PID 3352 wrote to memory of 4716	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	107
PID 3352 wrote to memory of 4716	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	107
PID 3352 wrote to memory of 2044	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	108
PID 3352 wrote to memory of 2044	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	108
PID 3352 wrote to memory of 2044	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	108
PID 3352 wrote to memory of 2044	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	108
PID 3352 wrote to memory of 2044	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	108
PID 3352 wrote to memory of 2044	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	108
PID 3352 wrote to memory of 2044	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	108
PID 3352 wrote to memory of 2044	3352	761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe	108

C:\Users\Admin\AppData\Local\Temp\761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3352
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KZqUDYcny" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9F92.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:5064
- C:\Users\Admin\AppData\Local\Temp\761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe"
  2⤵
  PID:4716
- C:\Users\Admin\AppData\Local\Temp\761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2044

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\Microsoft\CLR_v4.0_32\UsageLogs\761e34c09293f429b26fa9b08a942746_JaffaCakes118.exe.log

Filesize
1KB

MD5
17573558c4e714f606f997e5157afaac

SHA1
13e16e9415ceef429aaf124139671ebeca09ed23

SHA256
c18db6aecad2436da4a63ff26af4e3a337cca48f01c21b8db494fe5ccc60e553

SHA512
f4edf13f05a0d142e4dd42802098c8c44988ee8869621a62c2b565a77c9a95857f636583ff8d6d9baa366603d98b9bfbf1fc75bc6f9f8f83c80cb1215b2941cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9F92.tmp

Filesize
1KB

MD5
881168429cce037864f70de6afb53c55

SHA1
8ccf064b5ec22c7b8ef3a1998e742d7adfbd52e3

SHA256
876a637912fb3af6317ac51c2e4ab6b603f36ac53be07a9dfdbe060219f0abf4

SHA512
3e321fb28e6ea7166051906fb8a4fbb235e43ee2c7e78229f5483ad727b8394cd515c8b8d46f3ea823e4f5972d1180f2af5c6be31baf1bc31108b73b2950e46d

Download Submit
memory/2044-23-0x00000000751B0000-0x0000000075960000-memory.dmp

Filesize
7.7MB

Download
memory/2044-22-0x00000000751B0000-0x0000000075960000-memory.dmp

Filesize
7.7MB

Download
memory/2044-20-0x00000000751B0000-0x0000000075960000-memory.dmp

Filesize
7.7MB

Download
memory/2044-17-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3352-4-0x0000000004EC0000-0x0000000004F52000-memory.dmp

Filesize
584KB

Download
memory/3352-7-0x00000000751B0000-0x0000000075960000-memory.dmp

Filesize
7.7MB

Download
memory/3352-8-0x0000000004EA0000-0x0000000004EAA000-memory.dmp

Filesize
40KB

Download
memory/3352-9-0x00000000751BE000-0x00000000751BF000-memory.dmp

Filesize
4KB

Download
memory/3352-10-0x00000000751B0000-0x0000000075960000-memory.dmp

Filesize
7.7MB

Download
memory/3352-11-0x00000000009A0000-0x00000000009E0000-memory.dmp

Filesize
256KB

Download
memory/3352-6-0x00000000050D0000-0x0000000005126000-memory.dmp

Filesize
344KB

Download
memory/3352-5-0x0000000004E50000-0x0000000004E5A000-memory.dmp

Filesize
40KB

Download
memory/3352-0-0x00000000751BE000-0x00000000751BF000-memory.dmp

Filesize
4KB

Download
memory/3352-3-0x00000000053D0000-0x0000000005974000-memory.dmp

Filesize
5.6MB

Download
memory/3352-21-0x00000000751B0000-0x0000000075960000-memory.dmp

Filesize
7.7MB

Download
memory/3352-2-0x0000000004D60000-0x0000000004DFC000-memory.dmp

Filesize
624KB

Download
memory/3352-1-0x0000000000370000-0x00000000003F6000-memory.dmp

Filesize
536KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads