asyncrat | c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af

General

Target
c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
Size 45KB
Sample260804-spspaahl21
SHA256 c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af
MD5 ee05770e2951c01fd8fa768652e73657
SHA1 53476963545a245b2b833f25e03cf0c84352573b
SHA512 d7160b9c711b863e14a87d2efb3801787d0b3180624e4db555872408761aa004dc6f4da7a6c5cc6037aaec3747c22c040e5a671309a5d4322c78b26552a890d9
SSDEEP 768:suJdpTP3tcsWUODmqmo2qVCT2QAm7PI1MjbhgX3iRqO+2A0rHrBDZkx:suJdpTPdI2+T18bOXSRqB+Rdkx
TLSH
T178232A003BE9822BF2BE4FB868F26145467AF5637603D5492CC412DB5723FC6DA426F9
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

fimsexvietnam.com:80
fimsexvietnam.com:22
fimsexvietnam.com:8080
fimsexvietnam.com:8880
fimsexvietnam.com:2052
fimsexvietnam.com:2082
fimsexvietnam.com:2086
fimsexvietnam.com:2095
fimsexvietnam.com:443
fimsexvietnam.com:2053
fimsexvietnam.com:2083
fimsexvietnam.com:2087
fimsexvietnam.com:2096
fimsexvietnam.com:8443
www.fimsexvietnam.com:80
www.fimsexvietnam.com:22
www.fimsexvietnam.com:8080
www.fimsexvietnam.com:8880
www.fimsexvietnam.com:2052
www.fimsexvietnam.com:2082
www.fimsexvietnam.com:2086
www.fimsexvietnam.com:2095
www.fimsexvietnam.com:443
www.fimsexvietnam.com:2053
www.fimsexvietnam.com:2083
www.fimsexvietnam.com:2087
www.fimsexvietnam.com:2096
www.fimsexvietnam.com:8443
clop.fimsexvietnam.com:80
clop.fimsexvietnam.com:22
clop.fimsexvietnam.com:8080
clop.fimsexvietnam.com:8880
clop.fimsexvietnam.com:2052
clop.fimsexvietnam.com:2082
clop.fimsexvietnam.com:2086
clop.fimsexvietnam.com:2095
clop.fimsexvietnam.com:443
clop.fimsexvietnam.com:2053
clop.fimsexvietnam.com:2083
clop.fimsexvietnam.com:2087
clop.fimsexvietnam.com:2096
clop.fimsexvietnam.com:8443
hacker.fimsexvietnam.com:80
hacker.fimsexvietnam.com:22
hacker.fimsexvietnam.com:8080
hacker.fimsexvietnam.com:8880
hacker.fimsexvietnam.com:2052
hacker.fimsexvietnam.com:2082
hacker.fimsexvietnam.com:2086
hacker.fimsexvietnam.com:2095
hacker.fimsexvietnam.com:443
hacker.fimsexvietnam.com:2053
hacker.fimsexvietnam.com:2083
hacker.fimsexvietnam.com:2087
hacker.fimsexvietnam.com:2096
hacker.fimsexvietnam.com:8443

Mutex

YbMCCWZcSFAL

Attributes

delay
0
install
true
install_file
zqrcpr09.exe
install_folder
%AppData%

aes.plain

Signatures

Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral1/files/0x00080000000244ad-8.dat	family_asyncrat
behavioral1/memory/4152-10-0x0000000005900000-0x0000000005910000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe

Executes dropped EXE 2 IoCs

pid	Process
4152	zqrcpr09.exe
4148	zqrcpr09.exe

Outbound SSH connection to public host 2 TTPs 3 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc	pid	Process
SSH destination	14	172.67.182.173:22	4152	zqrcpr09.exe
SSH destination	41	104.21.36.7:22	4152	zqrcpr09.exe
SSH destination	102	172.67.182.173:22	4152	zqrcpr09.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3040	cmd.exe
4488	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.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	zqrcpr09.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zqrcpr09.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4424	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
2660	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
Token: SeDebugPrivilege	4152	zqrcpr09.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2044 wrote to memory of 3040	2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe	83
PID 2044 wrote to memory of 4488	2044	c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe	85
PID 4488 wrote to memory of 4424	4488	cmd.exe	87
PID 3040 wrote to memory of 2660	3040	cmd.exe	88
PID 4488 wrote to memory of 4148	4488	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe
"C:\Users\Admin\AppData\Local\Temp\c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2044
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "zqrcpr09" /tr '"C:\Users\Admin\AppData\Roaming\zqrcpr09.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3040
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "zqrcpr09" /tr '"C:\Users\Admin\AppData\Roaming\zqrcpr09.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2660
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4BE9.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4488
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4424
- - C:\Users\Admin\AppData\Roaming\zqrcpr09.exe
    "C:\Users\Admin\AppData\Roaming\zqrcpr09.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4148

C:\Users\Admin\AppData\Roaming\zqrcpr09.exe
"C:\Users\Admin\AppData\Roaming\zqrcpr09.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4152

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

Network Service Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

1

T1572

Exfiltration

Impact

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Downloads

tmp4BE9.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4BE9.tmp.bat
Size 152B
SHA256 b0b0b5509b1346ef3aa9504f76b20270aec5c3bfa902a735b03ab57e6e54a8cb
MD5 e7e6b82ccdd50306e1a8b48a56261352
SHA1 46b986b117d145d598e7446544bc12e2dc3c310d
SHA512 6a9397b35bd2e198cb349a9a22511a0538551e6a82fe5ab8d8ab514a4862c665fc90f7149db2e07e1b1c6c86fd2b1f15bcb2d7fbec1ef8bb5b779655b8a047f4
TLSH
T158C02B4666C7EB0F3909A46306FAD88E92776C193F40FF40D314408E13C0888F0DA342
MD5 SHA1 SHA512 TLSH

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zqrcpr09.exe

Path C:\Users\Admin\AppData\Roaming\zqrcpr09.exe
Size 45KB
SHA256 c7183821f1f1dbef7f77086eee473fc1c52b93c7bd0d293a0c99489ffcbac1af
MD5 ee05770e2951c01fd8fa768652e73657
SHA1 53476963545a245b2b833f25e03cf0c84352573b
SHA512 d7160b9c711b863e14a87d2efb3801787d0b3180624e4db555872408761aa004dc6f4da7a6c5cc6037aaec3747c22c040e5a671309a5d4322c78b26552a890d9
SSDEEP 768:suJdpTP3tcsWUODmqmo2qVCT2QAm7PI1MjbhgX3iRqO+2A0rHrBDZkx:suJdpTPdI2+T18bOXSRqB+Rdkx
TLSH
T178232A003BE9822BF2BE4FB868F26145467AF5637603D5492CC412DB5723FC6DA426F9
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2044-0-0x0000000000D30000-0x0000000000D42000-memory.dmp

Download

memory/2044-1-0x0000000005540000-0x0000000005550000-memory.dmp

Download

memory/2044-2-0x00000000055F0000-0x000000000568C000-memory.dmp

Download

memory/4152-10-0x0000000005900000-0x0000000005910000-memory.dmp

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memory/4152-13-0x0000000005900000-0x0000000005910000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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