asyncrat | d00058c2144c5f88286e35bc8d58fa37b2c791cb1de0a088e092d00681917fb4

General

Target
tmpp0x9aefk.exe
Size 45KB
Sample260602-jp3ptagv4x
SHA256 d00058c2144c5f88286e35bc8d58fa37b2c791cb1de0a088e092d00681917fb4
MD5 fa1c70ede56bb0d8b5f2b20634f9535b
SHA1 3a29ec98005cfc82f6b853ae410505d9fc9ae074
SHA512 0c7fc2aad773842969b5fb168aa139c0750881113fa2e0e2aa78a11660b9630504ed29b75a7e39630bf4be746b6b18793e78d003113089e38e3a1cc642eb1c37
SSDEEP 768:5uSyDpTpwrSWWUE3/WImo2qNVcQSCBznqNLPI7zjb5gX3iJwSpcZfvC0S+dLFrnz:5uSyDpTpoo2Ec9UqC73bWXSJ4Zfvy+h1
TLSH
T115231A003BEC822BF2BE4F7898F26145867AF6677603D5492CC451DB5613FC68642AFE
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

sexvietno1.net:443
sexvietno1.net:80
sexvietno1.net:7797
sexvietno1.net:8707
sexvietno1.net:6620
www.sexvietno1.net:443
www.sexvietno1.net:80
www.sexvietno1.net:7797
www.sexvietno1.net:8707
www.sexvietno1.net:6620
blaster.sexvietno1.net:443
blaster.sexvietno1.net:80
blaster.sexvietno1.net:7797
blaster.sexvietno1.net:8707
blaster.sexvietno1.net:6620
hacker.sexvietno1.net:443
hacker.sexvietno1.net:80
hacker.sexvietno1.net:7797
hacker.sexvietno1.net:8707
hacker.sexvietno1.net:6620
trisis.sexvietno1.net:443
trisis.sexvietno1.net:80
trisis.sexvietno1.net:7797
trisis.sexvietno1.net:8707
trisis.sexvietno1.net:6620
industroyer.sexvietno1.net:443
industroyer.sexvietno1.net:80
industroyer.sexvietno1.net:7797
industroyer.sexvietno1.net:8707
industroyer.sexvietno1.net:6620

Mutex

d2CFFvNeeyNI

Attributes

delay
0
install
true
install_file
qo8lyvz.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
behavioral2/files/0x0003000000022b2c-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-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\International\Geo\Nation	tmpp0x9aefk.exe

Executes dropped EXE 2 IoCs

pid	Process
1044	qo8lyvz.exe
2004	qo8lyvz.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	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	qo8lyvz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	qo8lyvz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmpp0x9aefk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3508	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
4424	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe
1876	tmpp0x9aefk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1876	tmpp0x9aefk.exe
Token: SeDebugPrivilege	1044	qo8lyvz.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 3856	1876	tmpp0x9aefk.exe	88
PID 1876 wrote to memory of 4972	1876	tmpp0x9aefk.exe	90
PID 4972 wrote to memory of 3508	4972	cmd.exe	92
PID 3856 wrote to memory of 4424	3856	cmd.exe	93
PID 4972 wrote to memory of 2004	4972	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\tmpp0x9aefk.exe
"C:\Users\Admin\AppData\Local\Temp\tmpp0x9aefk.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "qo8lyvz" /tr '"C:\Users\Admin\AppData\Roaming\qo8lyvz.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3856
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "qo8lyvz" /tr '"C:\Users\Admin\AppData\Roaming\qo8lyvz.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4424
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7B36.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4972
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3508
- - C:\Users\Admin\AppData\Roaming\qo8lyvz.exe
    "C:\Users\Admin\AppData\Roaming\qo8lyvz.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2004

C:\Users\Admin\AppData\Roaming\qo8lyvz.exe
"C:\Users\Admin\AppData\Roaming\qo8lyvz.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1044

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

tmp7B36.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7B36.tmp.bat
Size 151B
SHA256 892e565bab20572e7d2687b13bfd14104a7746f7dcb9264208864e270c21e913
MD5 14598368f15dd95799690e8b073ee4ac
SHA1 941b61779ebcd3b3a3c26065ad1a2e213040bb74
SHA512 ff9a63204bd161f785b202272b5b7398f9fb21d3271265da20bf5bf98ab9760e9745801a2dfb14c3b426a50ae3fba4f84edd72d1bcb4137857f197033317f944
TLSH
T142C02B5351C9EA4F7945542306FEE4DEA1737D193F44FF00C308410E168046CF8E9385
MD5 SHA1 SHA512 TLSH

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qo8lyvz.exe

Path C:\Users\Admin\AppData\Roaming\qo8lyvz.exe
Size 45KB
SHA256 d00058c2144c5f88286e35bc8d58fa37b2c791cb1de0a088e092d00681917fb4
MD5 fa1c70ede56bb0d8b5f2b20634f9535b
SHA1 3a29ec98005cfc82f6b853ae410505d9fc9ae074
SHA512 0c7fc2aad773842969b5fb168aa139c0750881113fa2e0e2aa78a11660b9630504ed29b75a7e39630bf4be746b6b18793e78d003113089e38e3a1cc642eb1c37
SSDEEP 768:5uSyDpTpwrSWWUE3/WImo2qNVcQSCBznqNLPI7zjb5gX3iJwSpcZfvC0S+dLFrnz:5uSyDpTpoo2Ec9UqC73bWXSJ4Zfvy+h1
TLSH
T115231A003BEC822BF2BE4F7898F26145867AF6677603D5492CC451DB5613FC68642AFE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1044-10-0x0000000005260000-0x0000000005270000-memory.dmp

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memory/1044-13-0x0000000005260000-0x0000000005270000-memory.dmp

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memory/1876-0-0x0000000000D40000-0x0000000000D52000-memory.dmp

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memory/1876-1-0x0000000005710000-0x0000000005720000-memory.dmp

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memory/1876-2-0x00000000057C0000-0x000000000585C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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