asyncrat | 866ac65940057d6e1a125eda23a12d6743d75e6ff3a74ff6d53debb3fe90a368

Resubmissions

21/01/2025, 11:38

250121-nrw29s1pdv 10

12/07/2021, 18:02

210712-gblx3nc7be 10

Analysis

max time kernel
104s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
21/01/2025, 11:38

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Report Analysis Logs

General

Target

8a2abab20bf75ac19eaa73be3b09219d.exe
Size

455KB
MD5

8a2abab20bf75ac19eaa73be3b09219d
SHA1

c0fa652bb151644bf76b55f3c9d68cb5e8d7faf3
SHA256

866ac65940057d6e1a125eda23a12d6743d75e6ff3a74ff6d53debb3fe90a368
SHA512

e8842b9f47a5dce906ddca3dfbb608eba660c80364ed0b02b48c33e161df3e95226d713177733e7591cc7eccecb3f48e1a731576a90d6fbda194de98de5495c9
SSDEEP

12288:gPn4HHOqpc/Xzm9HtpiuJZoEMkEbSvxJxhF3eggJG:gPn6pc/WHtplJCDkE2/PNz

Score

10^/10

asyncrat default defense_evasion discovery link pdf persistence privilege_escalation rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

sbmsbm20.duckdns.org:2020

sbmsbm20.duckdns.org:3040

sbmsbm20.duckdns.org:4040

hpdndbnb.duckdns.org:2020

hpdndbnb.duckdns.org:3040

hpdndbnb.duckdns.org:4040

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Acrobat Reader.exe
install_folder
%Temp%

aes.plain

Signatures

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

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Adobe.exe\","	8a2abab20bf75ac19eaa73be3b09219d.exe

Detected Nirsoft tools 1 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral1/files/0x00150000000170f8-2016.dat	Nirsoft

Executes dropped EXE 5 IoCs

pid	Process
9516	AdvancedRun.exe
9588	AdvancedRun.exe
9636	AdvancedRun.exe
9668	AdvancedRun.exe
9948	Acrobat Reader.exe

Loads dropped DLL 9 IoCs

pid	Process
2540	8a2abab20bf75ac19eaa73be3b09219d.exe
2540	8a2abab20bf75ac19eaa73be3b09219d.exe
9516	AdvancedRun.exe
9516	AdvancedRun.exe
2540	8a2abab20bf75ac19eaa73be3b09219d.exe
2540	8a2abab20bf75ac19eaa73be3b09219d.exe
9636	AdvancedRun.exe
9636	AdvancedRun.exe
9872	cmd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2540 set thread context of 9700	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	33

HTTP links in PDF interactive object 1 IoCs

Detects HTTP links in interactive objects within PDF files.

pdf link

resource	yara_rule
behavioral1/files/0x00080000000186b7-2058.dat	pdf_with_link_action

Access Token Manipulation: Create Process with Token 1 TTPs 2 IoCs

defense_evasion privilege_escalation

Create Process with Token

T1134.002

pid	Process
9516	AdvancedRun.exe
9636	AdvancedRun.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 11 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	8a2abab20bf75ac19eaa73be3b09219d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AdvancedRun.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AdvancedRun.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AdvancedRun.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	Acrobat Reader.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AdvancedRun.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8a2abab20bf75ac19eaa73be3b09219d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
9920	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
9912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
9516	AdvancedRun.exe
9516	AdvancedRun.exe
9588	AdvancedRun.exe
9588	AdvancedRun.exe
9636	AdvancedRun.exe
9636	AdvancedRun.exe
9668	AdvancedRun.exe
9668	AdvancedRun.exe
2540	8a2abab20bf75ac19eaa73be3b09219d.exe
9700	8a2abab20bf75ac19eaa73be3b09219d.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	2540	8a2abab20bf75ac19eaa73be3b09219d.exe
Token: SeDebugPrivilege	9516	AdvancedRun.exe
Token: SeImpersonatePrivilege	9516	AdvancedRun.exe
Token: SeDebugPrivilege	9588	AdvancedRun.exe
Token: SeImpersonatePrivilege	9588	AdvancedRun.exe
Token: SeDebugPrivilege	9636	AdvancedRun.exe
Token: SeImpersonatePrivilege	9636	AdvancedRun.exe
Token: SeDebugPrivilege	9668	AdvancedRun.exe
Token: SeImpersonatePrivilege	9668	AdvancedRun.exe
Token: SeDebugPrivilege	9700	8a2abab20bf75ac19eaa73be3b09219d.exe
Token: SeDebugPrivilege	9948	Acrobat Reader.exe

Suspicious use of WriteProcessMemory 45 IoCs

description	pid	Process	procid_target
PID 2540 wrote to memory of 9516	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	29
PID 2540 wrote to memory of 9516	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	29
PID 2540 wrote to memory of 9516	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	29
PID 2540 wrote to memory of 9516	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	29
PID 9516 wrote to memory of 9588	9516	AdvancedRun.exe	30
PID 9516 wrote to memory of 9588	9516	AdvancedRun.exe	30
PID 9516 wrote to memory of 9588	9516	AdvancedRun.exe	30
PID 9516 wrote to memory of 9588	9516	AdvancedRun.exe	30
PID 2540 wrote to memory of 9636	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	31
PID 2540 wrote to memory of 9636	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	31
PID 2540 wrote to memory of 9636	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	31
PID 2540 wrote to memory of 9636	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	31
PID 9636 wrote to memory of 9668	9636	AdvancedRun.exe	32
PID 9636 wrote to memory of 9668	9636	AdvancedRun.exe	32
PID 9636 wrote to memory of 9668	9636	AdvancedRun.exe	32
PID 9636 wrote to memory of 9668	9636	AdvancedRun.exe	32
PID 2540 wrote to memory of 9700	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	33
PID 2540 wrote to memory of 9700	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	33
PID 2540 wrote to memory of 9700	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	33
PID 2540 wrote to memory of 9700	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	33
PID 2540 wrote to memory of 9700	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	33
PID 2540 wrote to memory of 9700	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	33
PID 2540 wrote to memory of 9700	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	33
PID 2540 wrote to memory of 9700	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	33
PID 2540 wrote to memory of 9700	2540	8a2abab20bf75ac19eaa73be3b09219d.exe	33
PID 9700 wrote to memory of 9828	9700	8a2abab20bf75ac19eaa73be3b09219d.exe	34
PID 9700 wrote to memory of 9828	9700	8a2abab20bf75ac19eaa73be3b09219d.exe	34
PID 9700 wrote to memory of 9828	9700	8a2abab20bf75ac19eaa73be3b09219d.exe	34
PID 9700 wrote to memory of 9828	9700	8a2abab20bf75ac19eaa73be3b09219d.exe	34
PID 9700 wrote to memory of 9872	9700	8a2abab20bf75ac19eaa73be3b09219d.exe	36
PID 9700 wrote to memory of 9872	9700	8a2abab20bf75ac19eaa73be3b09219d.exe	36
PID 9700 wrote to memory of 9872	9700	8a2abab20bf75ac19eaa73be3b09219d.exe	36
PID 9700 wrote to memory of 9872	9700	8a2abab20bf75ac19eaa73be3b09219d.exe	36
PID 9828 wrote to memory of 9912	9828	cmd.exe	38
PID 9828 wrote to memory of 9912	9828	cmd.exe	38
PID 9828 wrote to memory of 9912	9828	cmd.exe	38
PID 9828 wrote to memory of 9912	9828	cmd.exe	38
PID 9872 wrote to memory of 9920	9872	cmd.exe	39
PID 9872 wrote to memory of 9920	9872	cmd.exe	39
PID 9872 wrote to memory of 9920	9872	cmd.exe	39
PID 9872 wrote to memory of 9920	9872	cmd.exe	39
PID 9872 wrote to memory of 9948	9872	cmd.exe	40
PID 9872 wrote to memory of 9948	9872	cmd.exe	40
PID 9872 wrote to memory of 9948	9872	cmd.exe	40
PID 9872 wrote to memory of 9948	9872	cmd.exe	40

C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe
C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe sh $MOZILLA\nPLUGIN %SIGILL% "SIGTERM|DESTROY|SIGKILL"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
  "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /EXEFilename "C:\Windows\System32\sc.exe" /WindowState 0 /CommandLine "stop WinDefend" /StartDirectory "" /RunAs 8 /Run
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Access Token Manipulation: Create Process with Token
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:9516
- - C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
    "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 9516
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:9588
- C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
  "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /EXEFilename "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" /WindowState 0 /CommandLine "rmdir 'C:\ProgramData\Microsoft\Windows Defender' -Recurse" /StartDirectory "" /RunAs 8 /Run
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Access Token Manipulation: Create Process with Token
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:9636
- - C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
    "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 9636
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:9668
- C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe
  C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:9700
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Acrobat Reader" /tr '"C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:9828
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Acrobat Reader" /tr '"C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:9912
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpE2F0.tmp.bat""
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:9872
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:9920
  - - C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe
      "C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:9948

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Access Token Manipulation

T1134

Create Process with Token

T1134.002

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Access Token Manipulation

T1134

Create Process with Token

T1134.002

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe

Filesize
455KB

MD5
8a2abab20bf75ac19eaa73be3b09219d

SHA1
c0fa652bb151644bf76b55f3c9d68cb5e8d7faf3

SHA256
866ac65940057d6e1a125eda23a12d6743d75e6ff3a74ff6d53debb3fe90a368

SHA512
e8842b9f47a5dce906ddca3dfbb608eba660c80364ed0b02b48c33e161df3e95226d713177733e7591cc7eccecb3f48e1a731576a90d6fbda194de98de5495c9

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE2F0.tmp.bat

Filesize
161B

MD5
d3c9b22215d076e41c80e3799e136912

SHA1
e8e88370386af4048e4e44b8bd4a2dfe7dc710b1

SHA256
063869049b582ddea9e4943d176cf1593fe88175382cb759f7d15ec57b0a1670

SHA512
7dff3ebdd3780c60118bd0159e6debd74e3b1d87fa3fa4807711a68741187c872952c742cac74449e01da4a0f5063197b9666421d62e46045ea73b4d6a91338a

Download Submit
\Users\Admin\AppData\Local\Temp\AdvancedRun.exe

Filesize
88KB

MD5
17fc12902f4769af3a9271eb4e2dacce

SHA1
9a4a1581cc3971579574f837e110f3bd6d529dab

SHA256
29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

SHA512
036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

Download Submit
memory/2540-48-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-42-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-5-0x0000000000710000-0x0000000000758000-memory.dmp

Filesize
288KB

Download
memory/2540-6-0x0000000005260000-0x00000000052CE000-memory.dmp

Filesize
440KB

Download
memory/2540-16-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-36-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-50-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-30-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-28-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-70-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-68-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-66-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-64-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-62-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-60-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-58-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-56-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-45-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-52-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-0-0x0000000074EBE000-0x0000000074EBF000-memory.dmp

Filesize
4KB

Download
memory/2540-4-0x0000000074EB0000-0x000000007559E000-memory.dmp

Filesize
6.9MB

Download
memory/2540-46-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-54-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-40-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-38-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-34-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-32-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-26-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-24-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-22-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-20-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-18-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-14-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-12-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-10-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-8-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-7-0x0000000005260000-0x00000000052C9000-memory.dmp

Filesize
420KB

Download
memory/2540-3-0x0000000074EBE000-0x0000000074EBF000-memory.dmp

Filesize
4KB

Download
memory/2540-1-0x0000000000F60000-0x0000000000FD4000-memory.dmp

Filesize
464KB

Download
memory/2540-2047-0x0000000074EB0000-0x000000007559E000-memory.dmp

Filesize
6.9MB

Download
memory/2540-2-0x0000000074EB0000-0x000000007559E000-memory.dmp

Filesize
6.9MB

Download
memory/9700-2046-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/9948-2060-0x00000000008A0000-0x0000000000914000-memory.dmp

Filesize
464KB

Download