asyncrat | b2faf8ba7de8dc67c73e33b7659e9d9e3f95d3e94e5501136d444b6ee7c2e46e

General

Target

gaming_hook.exe
Size

45KB
MD5

a83441b31075a2b7278f15a24745073a
SHA1

36a03ec203072393a76bbfb0560306e8113bbd34
SHA256

b2faf8ba7de8dc67c73e33b7659e9d9e3f95d3e94e5501136d444b6ee7c2e46e
SHA512

819604c704245bb0ef3623ce6e3d13e2c38f61719a089b2b79054aa531dd58cc1c4053dd86b7a2c0c934cab7c2ea8d2272240a4293746f55efe8a2e27069b108
SSDEEP

768:Pue21TYQZ3VWU1ymhbvmo2qjcKjPGaG6PIyzjbFgX3iU0SLRr5vjBDZtWG:Pue21TYiFhN21KTkDy3bCXSU0GtldYG

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

127.0.0.1:555

127.0.0.1:14965

7.tcp.eu.ngrok.io:6606

7.tcp.eu.ngrok.io:7707

7.tcp.eu.ngrok.io:8808

7.tcp.eu.ngrok.io:555

7.tcp.eu.ngrok.io:14965

Mutex

BHBLjnoIyYUB

Attributes

delay
3
install
true
install_file
pjewi89w30MS.exe
install_folder
%Temp%

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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\pjewi89w30MS.exe	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

Processes:

gaming_hook.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	gaming_hook.exe

Executes dropped EXE 1 IoCs

Processes:

pjewi89w30MS.exe

pid process

64 pjewi89w30MS.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service
T1102

Processes:

flow ioc

24 7.tcp.eu.ngrok.io
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
64	pjewi89w30MS.exe

flow	ioc
24	7.tcp.eu.ngrok.io

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:

timeout.exepjewi89w30MS.exegaming_hook.execmd.execmd.exeschtasks.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pjewi89w30MS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gaming_hook.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

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

816 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

3404 schtasks.exe

pid	process
816	timeout.exe

pid	process
3404	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

gaming_hook.exe

pid	process
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe
3124	gaming_hook.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

gaming_hook.exepjewi89w30MS.exe

description pid process

Token: SeDebugPrivilege 3124 gaming_hook.exe
Token: SeDebugPrivilege 64 pjewi89w30MS.exe
Token: SeDebugPrivilege 64 pjewi89w30MS.exe

description	pid	process
Token: SeDebugPrivilege	3124	gaming_hook.exe
Token: SeDebugPrivilege	64	pjewi89w30MS.exe
Token: SeDebugPrivilege	64	pjewi89w30MS.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

gaming_hook.execmd.execmd.exe

description	pid	process	target process
PID 3124 wrote to memory of 1916	3124	gaming_hook.exe	cmd.exe
PID 3124 wrote to memory of 1916	3124	gaming_hook.exe	cmd.exe
PID 3124 wrote to memory of 1916	3124	gaming_hook.exe	cmd.exe
PID 3124 wrote to memory of 4004	3124	gaming_hook.exe	cmd.exe
PID 3124 wrote to memory of 4004	3124	gaming_hook.exe	cmd.exe
PID 3124 wrote to memory of 4004	3124	gaming_hook.exe	cmd.exe
PID 1916 wrote to memory of 3404	1916	cmd.exe	schtasks.exe
PID 1916 wrote to memory of 3404	1916	cmd.exe	schtasks.exe
PID 1916 wrote to memory of 3404	1916	cmd.exe	schtasks.exe
PID 4004 wrote to memory of 816	4004	cmd.exe	timeout.exe
PID 4004 wrote to memory of 816	4004	cmd.exe	timeout.exe
PID 4004 wrote to memory of 816	4004	cmd.exe	timeout.exe
PID 4004 wrote to memory of 64	4004	cmd.exe	pjewi89w30MS.exe
PID 4004 wrote to memory of 64	4004	cmd.exe	pjewi89w30MS.exe
PID 4004 wrote to memory of 64	4004	cmd.exe	pjewi89w30MS.exe

C:\Users\Admin\AppData\Local\Temp\gaming_hook.exe
"C:\Users\Admin\AppData\Local\Temp\gaming_hook.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3124

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "pjewi89w30MS" /tr '"C:\Users\Admin\AppData\Local\Temp\pjewi89w30MS.exe"' & exit
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1916

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "pjewi89w30MS" /tr '"C:\Users\Admin\AppData\Local\Temp\pjewi89w30MS.exe"'
3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:3404

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC7C4.tmp.bat""
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4004

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:816

C:\Users\Admin\AppData\Local\Temp\pjewi89w30MS.exe
"C:\Users\Admin\AppData\Local\Temp\pjewi89w30MS.exe"
3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:64

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\pjewi89w30MS.exe

Filesize
45KB

MD5
a83441b31075a2b7278f15a24745073a

SHA1
36a03ec203072393a76bbfb0560306e8113bbd34

SHA256
b2faf8ba7de8dc67c73e33b7659e9d9e3f95d3e94e5501136d444b6ee7c2e46e

SHA512
819604c704245bb0ef3623ce6e3d13e2c38f61719a089b2b79054aa531dd58cc1c4053dd86b7a2c0c934cab7c2ea8d2272240a4293746f55efe8a2e27069b108

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC7C4.tmp.bat

Filesize
159B

MD5
c3d29d9663c741f96797b0bd78e87afb

SHA1
0f0ec21502bc35bff5662df7c15c9412de15568c

SHA256
6410768094a5849bf0359b8558be23901869a68dee883257cadc49e94bae7ee9

SHA512
0193a84beb07075605373ce1837545dbe3fef444251abd0d35486890b4bf1ddbcdb637e9f337737d4e663ed277d25fa17e92977d09da01160fdc91871dabcbef

Download Submit
memory/64-13-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download
memory/64-14-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download
memory/3124-0-0x00000000746AE000-0x00000000746AF000-memory.dmp

Filesize
4KB

Download
memory/3124-1-0x0000000000F70000-0x0000000000F82000-memory.dmp

Filesize
72KB

Download
memory/3124-2-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download
memory/3124-3-0x0000000005930000-0x00000000059CC000-memory.dmp

Filesize
624KB

Download
memory/3124-8-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads