asyncrat | e6844b43bbaaf9ea5be9a92810148eb1697c1a05097bdc585d9c9d4cce0e65d2

General

Target
tmpx8a7ewq8.exe
Size 45KB
Sample260702-rfwtxacy6q
SHA256 e6844b43bbaaf9ea5be9a92810148eb1697c1a05097bdc585d9c9d4cce0e65d2
MD5 df99a45eb46d470e2d796a65abf80677
SHA1 5b4e51108bc8bbaf376523c7fb49480d2e108976
SHA512 dfda0187c063fbed1ac237cd581498a03fd49722ffbfa73a7c81b0b8933db185a1433ecb1c0757bede79406751ce80f37a5303b7d9a8a0ae972d5b3e0e06c923
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q16T2Qpm7PIKVjb4XgX3ipzVdbK8+cxNoagBDZcx:RuxkJTgip2meK9b3XSpnX+cLYdcx
TLSH
T141233A003BE8C23BF2BE5F78ACF26145867AF6636603D5492CC411DB5723BC696426F9
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

horaxhora.com:80
horaxhora.com:22
horaxhora.com:8080
horaxhora.com:8880
horaxhora.com:2052
horaxhora.com:2082
horaxhora.com:2086
horaxhora.com:2095
horaxhora.com:443
horaxhora.com:2053
horaxhora.com:2083
horaxhora.com:2087
horaxhora.com:2096
horaxhora.com:8443
www.horaxhora.com:80
www.horaxhora.com:22
www.horaxhora.com:8080
www.horaxhora.com:8880
www.horaxhora.com:2052
www.horaxhora.com:2082
www.horaxhora.com:2086
www.horaxhora.com:2095
www.horaxhora.com:443
www.horaxhora.com:2053
www.horaxhora.com:2083
www.horaxhora.com:2087
www.horaxhora.com:2096
www.horaxhora.com:8443
malware.horaxhora.com:80
malware.horaxhora.com:22
malware.horaxhora.com:8080
malware.horaxhora.com:8880
malware.horaxhora.com:2052
malware.horaxhora.com:2082
malware.horaxhora.com:2086
malware.horaxhora.com:2095
malware.horaxhora.com:443
malware.horaxhora.com:2053
malware.horaxhora.com:2083
malware.horaxhora.com:2087
malware.horaxhora.com:2096
malware.horaxhora.com:8443
iloveyou.horaxhora.com:80
iloveyou.horaxhora.com:22
iloveyou.horaxhora.com:8080
iloveyou.horaxhora.com:8880
iloveyou.horaxhora.com:2052
iloveyou.horaxhora.com:2082
iloveyou.horaxhora.com:2086
iloveyou.horaxhora.com:2095
iloveyou.horaxhora.com:443
iloveyou.horaxhora.com:2053
iloveyou.horaxhora.com:2083
iloveyou.horaxhora.com:2087
iloveyou.horaxhora.com:2096
iloveyou.horaxhora.com:8443

Mutex

nLlTdSN3HF6T

Attributes

delay
0
install
true
install_file
ea8fg548.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
behavioral2/files/0x0008000000024492-8.dat	family_asyncrat
behavioral2/memory/4608-10-0x00000000048F0000-0x0000000004900000-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-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	tmpx8a7ewq8.exe

Executes dropped EXE 2 IoCs

pid	Process
4608	ea8fg548.exe
892	ea8fg548.exe

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

System Information Discovery
T1082

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	ea8fg548.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmpx8a7ewq8.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ea8fg548.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1676	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
872	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe
4468	tmpx8a7ewq8.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4468	tmpx8a7ewq8.exe
Token: SeDebugPrivilege	4608	ea8fg548.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4468 wrote to memory of 3828	4468	tmpx8a7ewq8.exe	84
PID 4468 wrote to memory of 4200	4468	tmpx8a7ewq8.exe	86
PID 4200 wrote to memory of 1676	4200	cmd.exe	88
PID 3828 wrote to memory of 872	3828	cmd.exe	89
PID 4200 wrote to memory of 892	4200	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\tmpx8a7ewq8.exe
"C:\Users\Admin\AppData\Local\Temp\tmpx8a7ewq8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4468
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ea8fg548" /tr '"C:\Users\Admin\AppData\Roaming\ea8fg548.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3828
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ea8fg548" /tr '"C:\Users\Admin\AppData\Roaming\ea8fg548.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:872
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB179.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4200
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1676
- - C:\Users\Admin\AppData\Roaming\ea8fg548.exe
    "C:\Users\Admin\AppData\Roaming\ea8fg548.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:892

C:\Users\Admin\AppData\Roaming\ea8fg548.exe
"C:\Users\Admin\AppData\Roaming\ea8fg548.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4608

Network

MITRE ATT&CK Enterprise v16

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

tmpB179.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpB179.tmp.bat
Size 152B
SHA256 95c16d1c8751216391d41e119b7583528e6987217aa3522aaf8d5c4fab38d4a1
MD5 5a0bb6054f72055813fcc6170ccc7911
SHA1 dc05c3d03ddc8320ebcc8632b4ab383e8f5e038e
SHA512 a5ce2cf5b6d5ccec19157c632b5dd2c5f297c80dc17c3fd9f1d81cc076ef87ad0e6718b5945d28735c0415e7ab7806e0666acafe1b04d0d61255f5b2add22849
TLSH
T1E8C08C9261C6EA1E6805586303BAD88C916269193F84AB409704446D9280848F0EA345
MD5 SHA1 SHA512 TLSH

Submit Download

ea8fg548.exe

Path C:\Users\Admin\AppData\Roaming\ea8fg548.exe
Size 45KB
SHA256 e6844b43bbaaf9ea5be9a92810148eb1697c1a05097bdc585d9c9d4cce0e65d2
MD5 df99a45eb46d470e2d796a65abf80677
SHA1 5b4e51108bc8bbaf376523c7fb49480d2e108976
SHA512 dfda0187c063fbed1ac237cd581498a03fd49722ffbfa73a7c81b0b8933db185a1433ecb1c0757bede79406751ce80f37a5303b7d9a8a0ae972d5b3e0e06c923
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q16T2Qpm7PIKVjb4XgX3ipzVdbK8+cxNoagBDZcx:RuxkJTgip2meK9b3XSpnX+cLYdcx
TLSH
T141233A003BE8C23BF2BE5F78ACF26145867AF6636603D5492CC411DB5723BC696426F9
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4468-0-0x0000000000AF0000-0x0000000000B02000-memory.dmp

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memory/4468-1-0x00000000031B0000-0x00000000031C0000-memory.dmp

Download

memory/4468-2-0x0000000005510000-0x00000000055AC000-memory.dmp

Download

memory/4608-10-0x00000000048F0000-0x0000000004900000-memory.dmp

Download

memory/4608-13-0x00000000048F0000-0x0000000004900000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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