asyncrat | 9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed

General

Target

9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
Size

238KB
MD5

9d1e589ea8c4b3c59d3fb46afa940da5
SHA1

817bf841284e0279d15cb27f73a0939344dfb811
SHA256

9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed
SHA512

a7db38a58cf9580c987fe6c3293dc279a67458850862d86d0cc60fb7c9213bf92311be2a8ac44ae055fd24619df8f76d33f32835a254d386e4e53e2602d63ac2
SSDEEP

3072:/Yzwrq5J9SwHMFF9Kw/kxLk42s/8Y31/Yvi9GA54IkMwP5gMTmmsolNIrRuw+mqM:A9zHMFF9KxLp8YFgvwmZrTmDAN

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

54.253.7.109:4447

Mutex

XqcNee3124zJ

Attributes

delay
21
install
true
install_file
service.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
behavioral1/memory/2760-2-0x0000000000220000-0x0000000000232000-memory.dmp	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

service.exe

pid process

968 service.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2228 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
968	service.exe

pid	process
2228	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:

9D1E589EA8C4B3C59D3FB46AFA940DA5.execmd.execmd.exeschtasks.exetimeout.exeservice.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9D1E589EA8C4B3C59D3FB46AFA940DA5.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	service.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

536 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

2920 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

9D1E589EA8C4B3C59D3FB46AFA940DA5.exe

pid process

2760 9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
2760 9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
2760 9D1E589EA8C4B3C59D3FB46AFA940DA5.exe

pid	process
536	timeout.exe

pid	process
2920	schtasks.exe

pid	process
2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

9D1E589EA8C4B3C59D3FB46AFA940DA5.exeservice.exe

description	pid	process
Token: SeDebugPrivilege	2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
Token: SeDebugPrivilege	968	service.exe
Token: SeDebugPrivilege	968	service.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

9D1E589EA8C4B3C59D3FB46AFA940DA5.execmd.execmd.exe

description	pid	process	target process
PID 2760 wrote to memory of 2672	2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 2760 wrote to memory of 2672	2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 2760 wrote to memory of 2672	2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 2760 wrote to memory of 2672	2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 2760 wrote to memory of 2228	2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 2760 wrote to memory of 2228	2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 2760 wrote to memory of 2228	2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 2760 wrote to memory of 2228	2760	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 2672 wrote to memory of 2920	2672	cmd.exe	schtasks.exe
PID 2672 wrote to memory of 2920	2672	cmd.exe	schtasks.exe
PID 2672 wrote to memory of 2920	2672	cmd.exe	schtasks.exe
PID 2672 wrote to memory of 2920	2672	cmd.exe	schtasks.exe
PID 2228 wrote to memory of 536	2228	cmd.exe	timeout.exe
PID 2228 wrote to memory of 536	2228	cmd.exe	timeout.exe
PID 2228 wrote to memory of 536	2228	cmd.exe	timeout.exe
PID 2228 wrote to memory of 536	2228	cmd.exe	timeout.exe
PID 2228 wrote to memory of 968	2228	cmd.exe	service.exe
PID 2228 wrote to memory of 968	2228	cmd.exe	service.exe
PID 2228 wrote to memory of 968	2228	cmd.exe	service.exe
PID 2228 wrote to memory of 968	2228	cmd.exe	service.exe

C:\Users\Admin\AppData\Local\Temp\9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
"C:\Users\Admin\AppData\Local\Temp\9D1E589EA8C4B3C59D3FB46AFA940DA5.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2760

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Roaming\service.exe"' & exit
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2672

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Roaming\service.exe"'
3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2920

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp9FC8.tmp.bat""
2⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2228

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:536

C:\Users\Admin\AppData\Roaming\service.exe
"C:\Users\Admin\AppData\Roaming\service.exe"
3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:968

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\Cab6A7.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9FC8.tmp.bat

Filesize
151B

MD5
d9b756187a41195fbbf5eedf028d65f4

SHA1
132dc93d1590510e0d542850b284a3b725d3c32b

SHA256
314dcd7c8109605f371dff7c3d1d53d400f05d3b25b632ef37f63a9c1e46f6a1

SHA512
f875d05658fd70e0363e883c12d43664d1ea001142bb40684fae2305ccd146efc82ca7d083fbf4ac9545238c2f60e44f2c4ff94263b75dec32ca5ac32c3ee99f

Download Submit
\Users\Admin\AppData\Roaming\service.exe

Filesize
238KB

MD5
9d1e589ea8c4b3c59d3fb46afa940da5

SHA1
817bf841284e0279d15cb27f73a0939344dfb811

SHA256
9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed

SHA512
a7db38a58cf9580c987fe6c3293dc279a67458850862d86d0cc60fb7c9213bf92311be2a8ac44ae055fd24619df8f76d33f32835a254d386e4e53e2602d63ac2

Download Submit
memory/968-18-0x0000000000E00000-0x0000000000E42000-memory.dmp

Filesize
264KB

Download
memory/2760-0-0x0000000074E8E000-0x0000000074E8F000-memory.dmp

Filesize
4KB

Download
memory/2760-1-0x0000000000AD0000-0x0000000000B12000-memory.dmp

Filesize
264KB

Download
memory/2760-2-0x0000000000220000-0x0000000000232000-memory.dmp

Filesize
72KB

Download
memory/2760-3-0x0000000074E8E000-0x0000000074E8F000-memory.dmp

Filesize
4KB

Download
memory/2760-4-0x0000000074E80000-0x000000007556E000-memory.dmp

Filesize
6.9MB

Download
memory/2760-13-0x0000000074E80000-0x000000007556E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads