asyncrat | 7f92427f427dcc9c8746f252d895e938107e94d6432028d7d4beae5523b56c8e

General

Target

4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
Size

36KB
MD5

4f35ac873a97230c69a50bc06fd750a9
SHA1

ade1e45a59fe0343cb7be26de680c80f7bab3519
SHA256

7f92427f427dcc9c8746f252d895e938107e94d6432028d7d4beae5523b56c8e
SHA512

64452c18ba544ad7c15d5cc9165c4886299cc64b72efa9f236b198c8f786ac9f1cfff53f5125896ad4d2dcd5039506f8406b4364fc693afddd547e1b80c5788f
SSDEEP

768:+yUXi87RgWVj4c0dGHl0QHyZLa2fed3dddddddw:+yUXi8tnj4rdI0QHIsd3dddddddw

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

justrandomhost.duckdns.org:1604

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
svchost.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
behavioral2/memory/5328-7-0x0000000005C70000-0x0000000005C82000-memory.dmp	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-1-5-21-1176886754-713327781-2233697964-1000\Control Panel\International\Geo\Nation	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
5732	svchost.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
7	pastebin.com
28	pastebin.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
5676	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
6008	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
Token: SeDebugPrivilege	5732	svchost.exe
Token: SeDebugPrivilege	5732	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5328 wrote to memory of 4876	5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe	89
PID 5328 wrote to memory of 4876	5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe	89
PID 5328 wrote to memory of 4876	5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe	89
PID 5328 wrote to memory of 2020	5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe	91
PID 5328 wrote to memory of 2020	5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe	91
PID 5328 wrote to memory of 2020	5328	4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe	91
PID 4876 wrote to memory of 6008	4876	cmd.exe	93
PID 4876 wrote to memory of 6008	4876	cmd.exe	93
PID 4876 wrote to memory of 6008	4876	cmd.exe	93
PID 2020 wrote to memory of 5676	2020	cmd.exe	94
PID 2020 wrote to memory of 5676	2020	cmd.exe	94
PID 2020 wrote to memory of 5676	2020	cmd.exe	94
PID 2020 wrote to memory of 5732	2020	cmd.exe	95
PID 2020 wrote to memory of 5732	2020	cmd.exe	95
PID 2020 wrote to memory of 5732	2020	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5328
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4876
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:6008
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCC97.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2020
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:5676
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:5732

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

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpCC97.tmp.bat

Filesize
151B

MD5
a2057b97adc1207c5e3449f93f6e4e6f

SHA1
ff0bcd206894d7f15b8ba7f5e0785a7e9f77521a

SHA256
8a8375b09c79ec3e3b0669357cc6fa8bba0f4af9c309e6e46a9884a2429ee9cf

SHA512
2f477a6ba6b3c986b3187873c90a322a725a36719b779d5fe92b479ef2f5fbd6c9d34ece170dffbfc30434a9faf7c4f1e87ae22484807fdc48951cac8c333489

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
36KB

MD5
4f35ac873a97230c69a50bc06fd750a9

SHA1
ade1e45a59fe0343cb7be26de680c80f7bab3519

SHA256
7f92427f427dcc9c8746f252d895e938107e94d6432028d7d4beae5523b56c8e

SHA512
64452c18ba544ad7c15d5cc9165c4886299cc64b72efa9f236b198c8f786ac9f1cfff53f5125896ad4d2dcd5039506f8406b4364fc693afddd547e1b80c5788f

Download Submit
memory/5328-6-0x0000000074820000-0x0000000074FD0000-memory.dmp

Filesize
7.7MB

Download
memory/5328-3-0x0000000005810000-0x00000000058A2000-memory.dmp

Filesize
584KB

Download
memory/5328-4-0x00000000058B0000-0x000000000594C000-memory.dmp

Filesize
624KB

Download
memory/5328-5-0x00000000057D0000-0x00000000057DA000-memory.dmp

Filesize
40KB

Download
memory/5328-0-0x000000007482E000-0x000000007482F000-memory.dmp

Filesize
4KB

Download
memory/5328-7-0x0000000005C70000-0x0000000005C82000-memory.dmp

Filesize
72KB

Download
memory/5328-8-0x0000000006DC0000-0x0000000006E26000-memory.dmp

Filesize
408KB

Download
memory/5328-13-0x0000000074820000-0x0000000074FD0000-memory.dmp

Filesize
7.7MB

Download
memory/5328-2-0x0000000005DC0000-0x0000000006364000-memory.dmp

Filesize
5.6MB

Download
memory/5328-1-0x0000000000E20000-0x0000000000E30000-memory.dmp

Filesize
64KB

Download
memory/5732-18-0x0000000074820000-0x0000000074FD0000-memory.dmp

Filesize
7.7MB

Download
memory/5732-19-0x0000000074820000-0x0000000074FD0000-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