asyncrat | ba4e656f1e01be59a74dd10864d9bc50d9add5647c2d860a6d1ad183008a39fb

General

Target

bundy.exe
Size

45KB
MD5

7f6f0f84c1ebc50ef5b07b400e3055b9
SHA1

ff1d521cd7e28db6a80fcb6a0937eab2efba8292
SHA256

ba4e656f1e01be59a74dd10864d9bc50d9add5647c2d860a6d1ad183008a39fb
SHA512

ba65999a790f0c76e315e023e69a1d748187ce1f7b4a68ab34618df97265dc5b16663251dcec14b6ee5bcb825094fba8049c088f9ae150edaf8fa62bf6c7fdfb
SSDEEP

768:Fuu11TwQsOnFWUFN1/mo2qD60YFK8oubbbQtTk/nPIAdzjbigX3iyX72osKkPNDo:Fuu11TwSb22YnctTiAAd3bFXSS72osKP

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:1604

Mutex

76neALhoLeyJ

Attributes

delay
3
install
true
install_file
bundy.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 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\bundy.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

bundy.exe

pid process

2792 bundy.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2304 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2792	bundy.exe

pid	process
2304	cmd.exe

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

Processes:

bundy.execmd.execmd.exeschtasks.exetimeout.exebundy.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bundy.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bundy.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2684 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

Processes:

schtasks.exe

pid process

2908 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

bundy.exe

pid process

1988 bundy.exe
1988 bundy.exe
1988 bundy.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

bundy.exebundy.exe

description pid process

Token: SeDebugPrivilege 1988 bundy.exe
Token: SeDebugPrivilege 2792 bundy.exe

pid	process
2684	timeout.exe

pid	process
2908	schtasks.exe

pid	process
1988	bundy.exe
1988	bundy.exe
1988	bundy.exe

description	pid	process
Token: SeDebugPrivilege	1988	bundy.exe
Token: SeDebugPrivilege	2792	bundy.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

bundy.execmd.execmd.exe

description	pid	process	target process
PID 1988 wrote to memory of 1900	1988	bundy.exe	cmd.exe
PID 1988 wrote to memory of 1900	1988	bundy.exe	cmd.exe
PID 1988 wrote to memory of 1900	1988	bundy.exe	cmd.exe
PID 1988 wrote to memory of 1900	1988	bundy.exe	cmd.exe
PID 1988 wrote to memory of 2304	1988	bundy.exe	cmd.exe
PID 1988 wrote to memory of 2304	1988	bundy.exe	cmd.exe
PID 1988 wrote to memory of 2304	1988	bundy.exe	cmd.exe
PID 1988 wrote to memory of 2304	1988	bundy.exe	cmd.exe
PID 1900 wrote to memory of 2908	1900	cmd.exe	schtasks.exe
PID 1900 wrote to memory of 2908	1900	cmd.exe	schtasks.exe
PID 1900 wrote to memory of 2908	1900	cmd.exe	schtasks.exe
PID 1900 wrote to memory of 2908	1900	cmd.exe	schtasks.exe
PID 2304 wrote to memory of 2684	2304	cmd.exe	timeout.exe
PID 2304 wrote to memory of 2684	2304	cmd.exe	timeout.exe
PID 2304 wrote to memory of 2684	2304	cmd.exe	timeout.exe
PID 2304 wrote to memory of 2684	2304	cmd.exe	timeout.exe
PID 2304 wrote to memory of 2792	2304	cmd.exe	bundy.exe
PID 2304 wrote to memory of 2792	2304	cmd.exe	bundy.exe
PID 2304 wrote to memory of 2792	2304	cmd.exe	bundy.exe
PID 2304 wrote to memory of 2792	2304	cmd.exe	bundy.exe

C:\Users\Admin\AppData\Local\Temp\bundy.exe
"C:\Users\Admin\AppData\Local\Temp\bundy.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1988
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "bundy" /tr '"C:\Users\Admin\AppData\Roaming\bundy.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1900
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "bundy" /tr '"C:\Users\Admin\AppData\Roaming\bundy.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2908
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC072.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2304
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2684
- - C:\Users\Admin\AppData\Roaming\bundy.exe
    "C:\Users\Admin\AppData\Roaming\bundy.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2792

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\tmpC072.tmp.bat

Filesize
149B

MD5
5a22e3d3d08f4cb20635206caad00bae

SHA1
7252ee7cf5247ccedf6923dd212632a8952b8a96

SHA256
466f92137918c78339b54031575fea0d75a940c54d397998692dbc5ecbcad896

SHA512
d68690b64abab7c00684b81bfb696243d81d9ca81a66f0098a92371ed9ccffcfd5c6596583dabbf621891d6da273deff2d4439fa8ed5de78471f261da4015a83

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

Filesize
45KB

MD5
7f6f0f84c1ebc50ef5b07b400e3055b9

SHA1
ff1d521cd7e28db6a80fcb6a0937eab2efba8292

SHA256
ba4e656f1e01be59a74dd10864d9bc50d9add5647c2d860a6d1ad183008a39fb

SHA512
ba65999a790f0c76e315e023e69a1d748187ce1f7b4a68ab34618df97265dc5b16663251dcec14b6ee5bcb825094fba8049c088f9ae150edaf8fa62bf6c7fdfb

Download Submit
memory/1988-0-0x00000000743FE000-0x00000000743FF000-memory.dmp

Filesize
4KB

Download
memory/1988-1-0x0000000000AE0000-0x0000000000AF2000-memory.dmp

Filesize
72KB

Download
memory/1988-2-0x00000000743F0000-0x0000000074ADE000-memory.dmp

Filesize
6.9MB

Download
memory/1988-12-0x00000000743F0000-0x0000000074ADE000-memory.dmp

Filesize
6.9MB

Download
memory/2792-16-0x00000000001D0000-0x00000000001E2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads