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 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/5028-2-0x00000000010A0000-0x00000000010B2000-memory.dmp	family_asyncrat
behavioral2/memory/2364-17-0x0000000002BF0000-0x0000000002C02000-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

Processes:

9D1E589EA8C4B3C59D3FB46AFA940DA5.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe

Executes dropped EXE 1 IoCs

Processes:

service.exe

pid process

2364 service.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2364	service.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:

timeout.exeschtasks.exeservice.exe9D1E589EA8C4B3C59D3FB46AFA940DA5.execmd.execmd.exe

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	service.exe
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

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

412 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

2844 schtasks.exe

pid	process
412	timeout.exe

pid	process
2844	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

9D1E589EA8C4B3C59D3FB46AFA940DA5.exe

pid	process
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

9D1E589EA8C4B3C59D3FB46AFA940DA5.exeservice.exe

description	pid	process
Token: SeDebugPrivilege	5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
Token: SeDebugPrivilege	2364	service.exe
Token: SeDebugPrivilege	2364	service.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

9D1E589EA8C4B3C59D3FB46AFA940DA5.execmd.execmd.exe

description	pid	process	target process
PID 5028 wrote to memory of 2464	5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 5028 wrote to memory of 2464	5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 5028 wrote to memory of 2464	5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 5028 wrote to memory of 4644	5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 5028 wrote to memory of 4644	5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 5028 wrote to memory of 4644	5028	9D1E589EA8C4B3C59D3FB46AFA940DA5.exe	cmd.exe
PID 4644 wrote to memory of 412	4644	cmd.exe	timeout.exe
PID 4644 wrote to memory of 412	4644	cmd.exe	timeout.exe
PID 4644 wrote to memory of 412	4644	cmd.exe	timeout.exe
PID 2464 wrote to memory of 2844	2464	cmd.exe	schtasks.exe
PID 2464 wrote to memory of 2844	2464	cmd.exe	schtasks.exe
PID 2464 wrote to memory of 2844	2464	cmd.exe	schtasks.exe
PID 4644 wrote to memory of 2364	4644	cmd.exe	service.exe
PID 4644 wrote to memory of 2364	4644	cmd.exe	service.exe
PID 4644 wrote to memory of 2364	4644	cmd.exe	service.exe

C:\Users\Admin\AppData\Local\Temp\9D1E589EA8C4B3C59D3FB46AFA940DA5.exe
"C:\Users\Admin\AppData\Local\Temp\9D1E589EA8C4B3C59D3FB46AFA940DA5.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5028

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:2464

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:2844

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC98A.tmp.bat""
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4644

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:412

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:2364

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC98A.tmp.bat

Filesize
151B

MD5
0c30aee0a765a232a838ef4a94bb223d

SHA1
8015b087b0fee895888bccf2c8eabef6130d58d4

SHA256
80a7bfe94616da5229696fad629f85bc14f4f92d49244000279797b6d58ed646

SHA512
9b5fdb8dd32374a8d116d6cac5135b37df2a381908c4a2661bf598d53e19ba599fcda2998763322468afbaa8fdf546c83a1fb982215988d0c18ae623cd5f70f0

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

Filesize
238KB

MD5
9d1e589ea8c4b3c59d3fb46afa940da5

SHA1
817bf841284e0279d15cb27f73a0939344dfb811

SHA256
9164f89ff66d0726e661c46dbafabf82c477a61b6d9a231170fd26910997c8ed

SHA512
a7db38a58cf9580c987fe6c3293dc279a67458850862d86d0cc60fb7c9213bf92311be2a8ac44ae055fd24619df8f76d33f32835a254d386e4e53e2602d63ac2

Download Submit
memory/2364-21-0x0000000006DB0000-0x0000000007354000-memory.dmp

Filesize
5.6MB

Download
memory/2364-18-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/2364-17-0x0000000002BF0000-0x0000000002C02000-memory.dmp

Filesize
72KB

Download
memory/2364-16-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/5028-3-0x000000007534E000-0x000000007534F000-memory.dmp

Filesize
4KB

Download
memory/5028-11-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/5028-6-0x00000000057D0000-0x000000000586C000-memory.dmp

Filesize
624KB

Download
memory/5028-5-0x00000000050D0000-0x0000000005136000-memory.dmp

Filesize
408KB

Download
memory/5028-4-0x0000000075340000-0x0000000075AF0000-memory.dmp

Filesize
7.7MB

Download
memory/5028-0-0x000000007534E000-0x000000007534F000-memory.dmp

Filesize
4KB

Download
memory/5028-2-0x00000000010A0000-0x00000000010B2000-memory.dmp

Filesize
72KB

Download
memory/5028-1-0x00000000006B0000-0x00000000006F2000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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