asyncrat | 3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b

General

Target
3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
Size 45KB
Sample260815-pyqphaxvbw
SHA256 3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b
MD5 1624d552312cb07be02ecce27d4667ac
SHA1 b8845cbfa0c4ecbeed3080b7636302d17032096e
SHA512 d994c7c85ee5976a540bf8e5bfb55bdeb9297834c8f162bd26114aa44d2dcbc34f0ca2e60b4a7bb42a969d8cc6eb88997be71dade2c4a758845db6b41fd9f845
SSDEEP 768:cu6RaepTPYzbs8WU+Xaamo2q1Jw0QbKXPIhzjbvgX3i0dqKuTJlB9XXpICBDZUx:cu6YepTPso228h3bYXS0dalBxDdUx
TLSH
T166233C003BD9823BF2BE4FB898F26145867AF5632603D94D2CC451DB5623FC69A426FD
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

ads.zorvec.name:80
ads.zorvec.name:22
ads.zorvec.name:8080
ads.zorvec.name:8880
ads.zorvec.name:2052
ads.zorvec.name:2082
ads.zorvec.name:2086
ads.zorvec.name:2095
ads.zorvec.name:443
ads.zorvec.name:2053
ads.zorvec.name:2083
ads.zorvec.name:2087
ads.zorvec.name:2096
ads.zorvec.name:8443
www.ads.zorvec.name:80
www.ads.zorvec.name:22
www.ads.zorvec.name:8080
www.ads.zorvec.name:8880
www.ads.zorvec.name:2052
www.ads.zorvec.name:2082
www.ads.zorvec.name:2086
www.ads.zorvec.name:2095
www.ads.zorvec.name:443
www.ads.zorvec.name:2053
www.ads.zorvec.name:2083
www.ads.zorvec.name:2087
www.ads.zorvec.name:2096
www.ads.zorvec.name:8443
nimda.ads.zorvec.name:80
nimda.ads.zorvec.name:22
nimda.ads.zorvec.name:8080
nimda.ads.zorvec.name:8880
nimda.ads.zorvec.name:2052
nimda.ads.zorvec.name:2082
nimda.ads.zorvec.name:2086
nimda.ads.zorvec.name:2095
nimda.ads.zorvec.name:443
nimda.ads.zorvec.name:2053
nimda.ads.zorvec.name:2083
nimda.ads.zorvec.name:2087
nimda.ads.zorvec.name:2096
nimda.ads.zorvec.name:8443
cl0p.ads.zorvec.name:80
cl0p.ads.zorvec.name:22
cl0p.ads.zorvec.name:8080
cl0p.ads.zorvec.name:8880
cl0p.ads.zorvec.name:2052
cl0p.ads.zorvec.name:2082
cl0p.ads.zorvec.name:2086
cl0p.ads.zorvec.name:2095
cl0p.ads.zorvec.name:443
cl0p.ads.zorvec.name:2053
cl0p.ads.zorvec.name:2083
cl0p.ads.zorvec.name:2087
cl0p.ads.zorvec.name:2096
cl0p.ads.zorvec.name:8443
triton.ads.zorvec.name:80
triton.ads.zorvec.name:22
triton.ads.zorvec.name:8080
triton.ads.zorvec.name:8880
triton.ads.zorvec.name:2052
triton.ads.zorvec.name:2082
triton.ads.zorvec.name:2086
triton.ads.zorvec.name:2095
triton.ads.zorvec.name:443
triton.ads.zorvec.name:2053
triton.ads.zorvec.name:2083
triton.ads.zorvec.name:2087
triton.ads.zorvec.name:2096
triton.ads.zorvec.name:8443

Mutex

xiCTimSPHmkl

Attributes

delay
0
install
true
install_file
q77vq133.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 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000600000001e6bc-8.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-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe

Executes dropped EXE 2 IoCs

pid	Process
4192	q77vq133.exe
4344	q77vq133.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	13	104.21.28.44:22	4192	q77vq133.exe
SSH destination	28	172.67.144.58:22	4192	q77vq133.exe
SSH destination	100	172.67.144.58:22	4192	q77vq133.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
3440	cmd.exe
3328	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	q77vq133.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	q77vq133.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3944	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
4760	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
Token: SeDebugPrivilege	4192	q77vq133.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4792 wrote to memory of 3440	4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe	86
PID 4792 wrote to memory of 3328	4792	3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe	88
PID 3328 wrote to memory of 3944	3328	cmd.exe	90
PID 3440 wrote to memory of 4760	3440	cmd.exe	91
PID 3328 wrote to memory of 4344	3328	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe
"C:\Users\Admin\AppData\Local\Temp\3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4792
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "q77vq133" /tr '"C:\Users\Admin\AppData\Roaming\q77vq133.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3440
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "q77vq133" /tr '"C:\Users\Admin\AppData\Roaming\q77vq133.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4760
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3E3D.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3328
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3944
- - C:\Users\Admin\AppData\Roaming\q77vq133.exe
    "C:\Users\Admin\AppData\Roaming\q77vq133.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4344

C:\Users\Admin\AppData\Roaming\q77vq133.exe
"C:\Users\Admin\AppData\Roaming\q77vq133.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4192

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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tmp3E3D.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3E3D.tmp.bat
Size 152B
SHA256 350e86568a28a09ba7817496da52f01de0d3a228374d08227a19a9f02336e694
MD5 c75741e8f7db5f820b8ccdc24e685e41
SHA1 ac34f1be2b8069df9ed3b80f055e094001bf9439
SHA512 0afbcb3cde1fc6a00f0cce29c290ae667b0c23b2ed63b73beb8d0d2dbffd3ff15b733417077ac0ccfe52aad3ae848ad2ea5a3c9210e6b7389436bccae4ff2230
TLSH
T102C02B43E6C6EA0F2C0E542302FAD4AC91776D1E3F48FB40D308400E3280959F0D938D
MD5 SHA1 SHA512 TLSH

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q77vq133.exe

Path C:\Users\Admin\AppData\Roaming\q77vq133.exe
Size 45KB
SHA256 3fa6a8e2405a868a3b118ad0787e2db88270b7ac262632acea9a84fc94d3862b
MD5 1624d552312cb07be02ecce27d4667ac
SHA1 b8845cbfa0c4ecbeed3080b7636302d17032096e
SHA512 d994c7c85ee5976a540bf8e5bfb55bdeb9297834c8f162bd26114aa44d2dcbc34f0ca2e60b4a7bb42a969d8cc6eb88997be71dade2c4a758845db6b41fd9f845
SSDEEP 768:cu6RaepTPYzbs8WU+Xaamo2q1Jw0QbKXPIhzjbvgX3i0dqKuTJlB9XXpICBDZUx:cu6YepTPso228h3bYXS0dalBxDdUx
TLSH
T166233C003BD9823BF2BE4FB898F26145867AF5632603D94D2CC451DB5623FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4192-10-0x00000000053E0000-0x00000000053F0000-memory.dmp

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memory/4192-13-0x00000000053E0000-0x00000000053F0000-memory.dmp

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memory/4792-0-0x0000000000870000-0x0000000000882000-memory.dmp

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memory/4792-1-0x0000000005180000-0x0000000005190000-memory.dmp

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memory/4792-2-0x0000000005230000-0x00000000052CC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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