asyncrat | 38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041

General

Target
38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
Size 45KB
Sample260817-vfhttsvdrf
SHA256 38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041
MD5 681efeeef002e390cb95bb379aa7aed3
SHA1 23812e0f050ae1d52a8c9f3d644e6e80e869d8a5
SHA512 4560927f079856045c21e42659f5f06c7e0ccd6cff4bc125a8bef6bf4ec40bb16834999682aedba680cfa826ff957a686ae58c9f64b3acfeb7f514809ea1583f
SSDEEP 768:kuSOpTPTCFcWUeXa6mo2qAaLiE02FjMdjYkkmPI9zjb/gX3iI22u2BDZMx:kuSOpTPOP2KL9wQP93bIXSI2YdMx
TLSH
T104232A0037E9812BF2BE4F749DF261458A7AF6732603D64A1CC411DB5623FC69A426FE
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
industroyer.ads.zorvec.name:80
industroyer.ads.zorvec.name:22
industroyer.ads.zorvec.name:8080
industroyer.ads.zorvec.name:8880
industroyer.ads.zorvec.name:2052
industroyer.ads.zorvec.name:2082
industroyer.ads.zorvec.name:2086
industroyer.ads.zorvec.name:2095
industroyer.ads.zorvec.name:443
industroyer.ads.zorvec.name:2053
industroyer.ads.zorvec.name:2083
industroyer.ads.zorvec.name:2087
industroyer.ads.zorvec.name:2096
industroyer.ads.zorvec.name:8443
shamoon.ads.zorvec.name:80
shamoon.ads.zorvec.name:22
shamoon.ads.zorvec.name:8080
shamoon.ads.zorvec.name:8880
shamoon.ads.zorvec.name:2052
shamoon.ads.zorvec.name:2082
shamoon.ads.zorvec.name:2086
shamoon.ads.zorvec.name:2095
shamoon.ads.zorvec.name:443
shamoon.ads.zorvec.name:2053
shamoon.ads.zorvec.name:2083
shamoon.ads.zorvec.name:2087
shamoon.ads.zorvec.name:2096
shamoon.ads.zorvec.name:8443
nanocore.ads.zorvec.name:80
nanocore.ads.zorvec.name:22
nanocore.ads.zorvec.name:8080
nanocore.ads.zorvec.name:8880
nanocore.ads.zorvec.name:2052
nanocore.ads.zorvec.name:2082
nanocore.ads.zorvec.name:2086
nanocore.ads.zorvec.name:2095
nanocore.ads.zorvec.name:443
nanocore.ads.zorvec.name:2053
nanocore.ads.zorvec.name:2083
nanocore.ads.zorvec.name:2087
nanocore.ads.zorvec.name:2096
nanocore.ads.zorvec.name:8443

Mutex

7l1t5LZThQMn

Attributes

delay
0
install
true
install_file
fis5.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/0x00090000000243e7-8.dat	family_asyncrat
behavioral1/memory/2204-10-0x0000000005490000-0x00000000054A0000-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-1-5-21-1788976790-1541110888-1636651838-1000\Control Panel\International\Geo\Nation	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe

Executes dropped EXE 2 IoCs

pid	Process
2204	fis5.exe
1900	fis5.exe

Outbound SSH connection to public host 2 TTPs 2 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	67	172.67.144.58:22	2204	fis5.exe
SSH destination	72	104.21.28.44:22	2204	fis5.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
4952	cmd.exe
2804	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	fis5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fis5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.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
2264	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
3012	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
Token: SeDebugPrivilege	2204	fis5.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4528 wrote to memory of 4952	4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe	85
PID 4528 wrote to memory of 2804	4528	38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe	87
PID 2804 wrote to memory of 2264	2804	cmd.exe	89
PID 4952 wrote to memory of 3012	4952	cmd.exe	90
PID 2804 wrote to memory of 1900	2804	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe
"C:\Users\Admin\AppData\Local\Temp\38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4528
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "fis5" /tr '"C:\Users\Admin\AppData\Roaming\fis5.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4952
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "fis5" /tr '"C:\Users\Admin\AppData\Roaming\fis5.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3012
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4050.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2804
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2264
- - C:\Users\Admin\AppData\Roaming\fis5.exe
    "C:\Users\Admin\AppData\Roaming\fis5.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1900

C:\Users\Admin\AppData\Roaming\fis5.exe
"C:\Users\Admin\AppData\Roaming\fis5.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2204

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

tmp4050.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4050.tmp.bat
Size 148B
SHA256 6376e261cb10421cd4b5cb50795c481fc85ba5ba3cf1146d92b4bca27d43b8d7
MD5 f25f759770d6dbdc021159d67f7d1449
SHA1 36f7c6fb36a7e713fcac6861b719935b1a92ef7b
SHA512 e34630929b1215ee010049be8136af8e7175273f2470fa0f2dcff9aecbc400b437a5dc8042e0370c932dff5fc665c6d58f7f97997b30db749f29bf9d4ee07764
TLSH
T1CDC02B4365C5EA0E2809781302FFD5CC91767D293F40BB40C704405D1280488F0D9341
MD5 SHA1 SHA512 TLSH

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fis5.exe

Path C:\Users\Admin\AppData\Roaming\fis5.exe
Size 45KB
SHA256 38e0e5ff61004c01a4f34d93fcb9be93afca2817e078ba85ac62fde8e7f0b041
MD5 681efeeef002e390cb95bb379aa7aed3
SHA1 23812e0f050ae1d52a8c9f3d644e6e80e869d8a5
SHA512 4560927f079856045c21e42659f5f06c7e0ccd6cff4bc125a8bef6bf4ec40bb16834999682aedba680cfa826ff957a686ae58c9f64b3acfeb7f514809ea1583f
SSDEEP 768:kuSOpTPTCFcWUeXa6mo2qAaLiE02FjMdjYkkmPI9zjb/gX3iI22u2BDZMx:kuSOpTPOP2KL9wQP93bIXSI2YdMx
TLSH
T104232A0037E9812BF2BE4F749DF261458A7AF6732603D64A1CC411DB5623FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2204-10-0x0000000005490000-0x00000000054A0000-memory.dmp

Download

memory/2204-13-0x0000000005490000-0x00000000054A0000-memory.dmp

Download

memory/4528-0-0x0000000000200000-0x0000000000212000-memory.dmp

Download

memory/4528-1-0x0000000004AC0000-0x0000000004AD0000-memory.dmp

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memory/4528-2-0x0000000004B70000-0x0000000004C0C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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