asyncrat | bd82518001b0e98e87bee5331d017872e5a2bafe549811d4953c145d5809e656

General

Target

Bender Logger V1.5 (still in beta).exe
Size

47KB
MD5

474f9807fa8bd9492fe2df927c22f8b8
SHA1

6c152c84e860d3e3fda3d42bd930eab9221d2960
SHA256

bd82518001b0e98e87bee5331d017872e5a2bafe549811d4953c145d5809e656
SHA512

a192c33482eb78552dac6e63d3a7888091a455b4c851fc3c6b6315ac4ffc1e14eb3de8e32784aa1d9ed23e324aff57e145b336e8627b4fd5dbd586246d312b7e
SSDEEP

768:quSgNT3ol7xWUpe+7mo2qLTrp5npecYgCPIXK5I0bIPrnnKshevEKwrDnsAs62tO:quSgNT3K52KjnpecrLXabqrnKtj2jxSM

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

0.tcp.eu.ngrok.io:8080

0.tcp.eu.ngrok.io:13424

Mutex

AsyncMutex_6SI8OkPnkasa

Attributes

delay
3
install
true
install_file
win.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/files/0x000b00000002345e-12.dat	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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	Bender Logger V1.5 (still in beta).exe

Executes dropped EXE 1 IoCs

pid	Process
3828	win.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 18 IoCs

Web Service

T1102

flow	ioc
172	0.tcp.eu.ngrok.io
124	0.tcp.eu.ngrok.io
142	0.tcp.eu.ngrok.io
147	0.tcp.eu.ngrok.io
153	0.tcp.eu.ngrok.io
162	0.tcp.eu.ngrok.io
87	0.tcp.eu.ngrok.io
93	0.tcp.eu.ngrok.io
96	0.tcp.eu.ngrok.io
114	0.tcp.eu.ngrok.io
116	0.tcp.eu.ngrok.io
167	0.tcp.eu.ngrok.io
158	0.tcp.eu.ngrok.io
24	0.tcp.eu.ngrok.io
62	0.tcp.eu.ngrok.io
102	0.tcp.eu.ngrok.io
132	0.tcp.eu.ngrok.io
136	0.tcp.eu.ngrok.io

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 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bender Logger V1.5 (still in beta).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1164	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
856	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe
2332	Bender Logger V1.5 (still in beta).exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2332	Bender Logger V1.5 (still in beta).exe
Token: SeDebugPrivilege	3828	win.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2332 wrote to memory of 1668	2332	Bender Logger V1.5 (still in beta).exe	87
PID 2332 wrote to memory of 1668	2332	Bender Logger V1.5 (still in beta).exe	87
PID 2332 wrote to memory of 1668	2332	Bender Logger V1.5 (still in beta).exe	87
PID 2332 wrote to memory of 1656	2332	Bender Logger V1.5 (still in beta).exe	89
PID 2332 wrote to memory of 1656	2332	Bender Logger V1.5 (still in beta).exe	89
PID 2332 wrote to memory of 1656	2332	Bender Logger V1.5 (still in beta).exe	89
PID 1656 wrote to memory of 1164	1656	cmd.exe	91
PID 1656 wrote to memory of 1164	1656	cmd.exe	91
PID 1656 wrote to memory of 1164	1656	cmd.exe	91
PID 1668 wrote to memory of 856	1668	cmd.exe	92
PID 1668 wrote to memory of 856	1668	cmd.exe	92
PID 1668 wrote to memory of 856	1668	cmd.exe	92
PID 1656 wrote to memory of 3828	1656	cmd.exe	95
PID 1656 wrote to memory of 3828	1656	cmd.exe	95
PID 1656 wrote to memory of 3828	1656	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\Bender Logger V1.5 (still in beta).exe
"C:\Users\Admin\AppData\Local\Temp\Bender Logger V1.5 (still in beta).exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2332
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "win" /tr '"C:\Users\Admin\AppData\Roaming\win.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1668
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "win" /tr '"C:\Users\Admin\AppData\Roaming\win.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:856
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA613.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1656
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1164
- - C:\Users\Admin\AppData\Roaming\win.exe
    "C:\Users\Admin\AppData\Roaming\win.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3828

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA613.tmp.bat

Filesize
147B

MD5
5c95345dfff8bdaccb0d4659953d321d

SHA1
1e9dc1e90e03dde5046cf5ff592bc143792dca01

SHA256
d7962321195b637a55742e932615f9142069847d4fa250019450af7dfbf97813

SHA512
d2f7e17d0e89485560d18a987057219be843bba5131d7a5c6d61423fbccd828af3ae33175b9ac4661112de41f5b05b1658600cd0c9aef4b6af0e8501b272a51b

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

Filesize
47KB

MD5
474f9807fa8bd9492fe2df927c22f8b8

SHA1
6c152c84e860d3e3fda3d42bd930eab9221d2960

SHA256
bd82518001b0e98e87bee5331d017872e5a2bafe549811d4953c145d5809e656

SHA512
a192c33482eb78552dac6e63d3a7888091a455b4c851fc3c6b6315ac4ffc1e14eb3de8e32784aa1d9ed23e324aff57e145b336e8627b4fd5dbd586246d312b7e

Download Submit
memory/2332-0-0x000000007493E000-0x000000007493F000-memory.dmp

Filesize
4KB

Download
memory/2332-1-0x0000000000480000-0x0000000000492000-memory.dmp

Filesize
72KB

Download
memory/2332-2-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/2332-3-0x0000000004D60000-0x0000000004DFC000-memory.dmp

Filesize
624KB

Download
memory/2332-8-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/3828-13-0x00000000748A0000-0x0000000075050000-memory.dmp

Filesize
7.7MB

Download
memory/3828-14-0x00000000748A0000-0x0000000075050000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads