asyncrat | 45ba43813271c0c4d377338c381992cd5b0220b80c00cffc0b284f84cc0aee66

General

Target

a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe
Size

426KB
MD5

a504f9dfe6a3554120c7902c56ddf3b2
SHA1

a89ca17e9c1af4912a55bdf49bc0020a3990b408
SHA256

45ba43813271c0c4d377338c381992cd5b0220b80c00cffc0b284f84cc0aee66
SHA512

7557a1bb0edde11ff8d4c68e9c3e11cde7c677e284afcdbd2359dcc9a88692299aa035098663c995948d07518711ac812f7f689a2a559d30da8afed7ce31a08c
SSDEEP

12288:URifysycqld21fNlRU3LmWTvnGeUITYBK7ENId0fGwVTMsMt:UoypcVFWDGXIEcIAILtT

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

primo1.hopto.org:7771

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
15
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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2976 set thread context of 4872	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	100

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	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a504f9dfe6a3554120c7902c56ddf3b2_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
2308	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 2308	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	98
PID 2976 wrote to memory of 2308	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	98
PID 2976 wrote to memory of 2308	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	98
PID 2976 wrote to memory of 4872	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	100
PID 2976 wrote to memory of 4872	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	100
PID 2976 wrote to memory of 4872	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	100
PID 2976 wrote to memory of 4872	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	100
PID 2976 wrote to memory of 4872	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	100
PID 2976 wrote to memory of 4872	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	100
PID 2976 wrote to memory of 4872	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	100
PID 2976 wrote to memory of 4872	2976	a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe	100

C:\Users\Admin\AppData\Local\Temp\a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a504f9dfe6a3554120c7902c56ddf3b2_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:2976
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JuAviJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8EFC.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2308
- C:\Users\Admin\AppData\Local\Temp\a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4872

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\a504f9dfe6a3554120c7902c56ddf3b2_JaffaCakes118.exe.log

Filesize
1KB

MD5
bb3d30439ec1e6435c3eac4df8c1d2e3

SHA1
c901d5946e53ae0a9e2417c8dfaf5786a0037422

SHA256
182adf89e57f80a92db9a5e13105cd59544f37855ca35f98116a0182ddd3b2e6

SHA512
d3547aadf665ce2552b3dfa350b80a5e813aa346870fb2b05a3b998096eebf563143bffe964e0f7243761b79420d1adf02f735779902901d1a41a1f35c557572

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp8EFC.tmp

Filesize
1KB

MD5
54999adef7c2f80c1899c0ad5aee3c98

SHA1
c05fc5161e3ada098f74b096225565213d0a8dab

SHA256
c26ad6e3dd0b86d62880bf411866308e15e79ae25cfee7beab143d2a2197aa32

SHA512
d26b069c839da82be84259ae6b0b6eb8b63cafd2d0a352426e24b362868659e3a2c3540e629210677f738369d831bd20865c1e8d9bc4cae598936bc0c07db59b

Download Submit
memory/2976-10-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/2976-11-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/2976-4-0x0000000005660000-0x00000000056F2000-memory.dmp

Filesize
584KB

Download
memory/2976-5-0x0000000005580000-0x000000000558A000-memory.dmp

Filesize
40KB

Download
memory/2976-6-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/2976-7-0x00000000058A0000-0x00000000058F6000-memory.dmp

Filesize
344KB

Download
memory/2976-8-0x00000000061C0000-0x0000000006514000-memory.dmp

Filesize
3.3MB

Download
memory/2976-9-0x0000000005B60000-0x0000000005B6A000-memory.dmp

Filesize
40KB

Download
memory/2976-0-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/2976-3-0x0000000005C10000-0x00000000061B4000-memory.dmp

Filesize
5.6MB

Download
memory/2976-12-0x0000000006770000-0x00000000067BA000-memory.dmp

Filesize
296KB

Download
memory/2976-2-0x00000000055C0000-0x000000000565C000-memory.dmp

Filesize
624KB

Download
memory/2976-1-0x0000000000C90000-0x0000000000D02000-memory.dmp

Filesize
456KB

Download
memory/2976-22-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/4872-21-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/4872-18-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4872-23-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/4872-24-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/4872-25-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads