asyncrat | f85fb30beeceb9e2721aa12deee155bb604c0a364f926da18644af7e6e5c7a25

Analysis

max time kernel
118s
max time network
163s
platform
windows7_x64
resource
win7-en-20211208
submitted
28/01/2022, 00:51

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General

Target
InvPROV-NTI-EXX-DECK-22-008.exe
Size 292KB
Sample220128-a7hmxsdccj
SHA256 f85fb30beeceb9e2721aa12deee155bb604c0a364f926da18644af7e6e5c7a25
MD5 1d142d1d500fdfbe3b7ef592a9a8895a
SHA1 e345c0434b4a276fec0855b8536723cd01466f9c
SHA512 33df0626b5669d5dbfde5916c37d66fbfac82ce6faed53febef0c2336bfb16a59214e37080ffc10a01bff8a9463a510b874ca1a627699a8526d3d719009aa52a
MD5 SHA1 SHA512

Score

10^/10

asyncrat rat spyware stealer suricata

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata

Async RAT payload 6 IoCs

rat

resource	yara_rule
behavioral1/memory/832-61-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/832-60-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/832-63-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/832-64-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1304-80-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1304-87-0x0000000000BC0000-0x0000000000BE2000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2012	MicrosoftDoc.exe
1304	MicrosoftDoc.exe

Loads dropped DLL 1 IoCs

pid	Process
1280	cmd.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1668 set thread context of 832	1668	InvPROV-NTI-EXX-DECK-22-008.exe	28
PID 2012 set thread context of 1304	2012	MicrosoftDoc.exe	36

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
276	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
432	timeout.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1668	InvPROV-NTI-EXX-DECK-22-008.exe
832	InvPROV-NTI-EXX-DECK-22-008.exe
832	InvPROV-NTI-EXX-DECK-22-008.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1668	InvPROV-NTI-EXX-DECK-22-008.exe
Token: SeDebugPrivilege	832	InvPROV-NTI-EXX-DECK-22-008.exe
Token: SeDebugPrivilege	1304	MicrosoftDoc.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 964	1668	InvPROV-NTI-EXX-DECK-22-008.exe	27
PID 1668 wrote to memory of 964	1668	InvPROV-NTI-EXX-DECK-22-008.exe	27
PID 1668 wrote to memory of 964	1668	InvPROV-NTI-EXX-DECK-22-008.exe	27
PID 1668 wrote to memory of 964	1668	InvPROV-NTI-EXX-DECK-22-008.exe	27
PID 1668 wrote to memory of 832	1668	InvPROV-NTI-EXX-DECK-22-008.exe	28
PID 1668 wrote to memory of 832	1668	InvPROV-NTI-EXX-DECK-22-008.exe	28
PID 1668 wrote to memory of 832	1668	InvPROV-NTI-EXX-DECK-22-008.exe	28
PID 1668 wrote to memory of 832	1668	InvPROV-NTI-EXX-DECK-22-008.exe	28
PID 1668 wrote to memory of 832	1668	InvPROV-NTI-EXX-DECK-22-008.exe	28
PID 1668 wrote to memory of 832	1668	InvPROV-NTI-EXX-DECK-22-008.exe	28
PID 1668 wrote to memory of 832	1668	InvPROV-NTI-EXX-DECK-22-008.exe	28
PID 1668 wrote to memory of 832	1668	InvPROV-NTI-EXX-DECK-22-008.exe	28
PID 1668 wrote to memory of 832	1668	InvPROV-NTI-EXX-DECK-22-008.exe	28
PID 832 wrote to memory of 1928	832	InvPROV-NTI-EXX-DECK-22-008.exe	29
PID 832 wrote to memory of 1928	832	InvPROV-NTI-EXX-DECK-22-008.exe	29
PID 832 wrote to memory of 1928	832	InvPROV-NTI-EXX-DECK-22-008.exe	29
PID 832 wrote to memory of 1928	832	InvPROV-NTI-EXX-DECK-22-008.exe	29
PID 832 wrote to memory of 1280	832	InvPROV-NTI-EXX-DECK-22-008.exe	31
PID 832 wrote to memory of 1280	832	InvPROV-NTI-EXX-DECK-22-008.exe	31
PID 832 wrote to memory of 1280	832	InvPROV-NTI-EXX-DECK-22-008.exe	31
PID 832 wrote to memory of 1280	832	InvPROV-NTI-EXX-DECK-22-008.exe	31
PID 1280 wrote to memory of 432	1280	cmd.exe	33
PID 1280 wrote to memory of 432	1280	cmd.exe	33
PID 1280 wrote to memory of 432	1280	cmd.exe	33
PID 1280 wrote to memory of 432	1280	cmd.exe	33
PID 1928 wrote to memory of 276	1928	cmd.exe	34
PID 1928 wrote to memory of 276	1928	cmd.exe	34
PID 1928 wrote to memory of 276	1928	cmd.exe	34
PID 1928 wrote to memory of 276	1928	cmd.exe	34
PID 1280 wrote to memory of 2012	1280	cmd.exe	35
PID 1280 wrote to memory of 2012	1280	cmd.exe	35
PID 1280 wrote to memory of 2012	1280	cmd.exe	35
PID 1280 wrote to memory of 2012	1280	cmd.exe	35
PID 2012 wrote to memory of 1304	2012	MicrosoftDoc.exe	36
PID 2012 wrote to memory of 1304	2012	MicrosoftDoc.exe	36
PID 2012 wrote to memory of 1304	2012	MicrosoftDoc.exe	36
PID 2012 wrote to memory of 1304	2012	MicrosoftDoc.exe	36
PID 2012 wrote to memory of 1304	2012	MicrosoftDoc.exe	36
PID 2012 wrote to memory of 1304	2012	MicrosoftDoc.exe	36
PID 2012 wrote to memory of 1304	2012	MicrosoftDoc.exe	36
PID 2012 wrote to memory of 1304	2012	MicrosoftDoc.exe	36
PID 2012 wrote to memory of 1304	2012	MicrosoftDoc.exe	36

C:\Users\Admin\AppData\Local\Temp\InvPROV-NTI-EXX-DECK-22-008.exe
"C:\Users\Admin\AppData\Local\Temp\InvPROV-NTI-EXX-DECK-22-008.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Users\Admin\AppData\Local\Temp\InvPROV-NTI-EXX-DECK-22-008.exe
  "C:\Users\Admin\AppData\Local\Temp\InvPROV-NTI-EXX-DECK-22-008.exe"
  2⤵
  PID:964
- C:\Users\Admin\AppData\Local\Temp\InvPROV-NTI-EXX-DECK-22-008.exe
  "C:\Users\Admin\AppData\Local\Temp\InvPROV-NTI-EXX-DECK-22-008.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:832
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "MicrosoftDoc" /tr '"C:\Users\Admin\AppData\Roaming\MicrosoftDoc.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1928
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "MicrosoftDoc" /tr '"C:\Users\Admin\AppData\Roaming\MicrosoftDoc.exe"'
      4⤵
      Creates scheduled task(s)
      PID:276
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2137.tmp.bat""
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1280
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:432
  - - C:\Users\Admin\AppData\Roaming\MicrosoftDoc.exe
      "C:\Users\Admin\AppData\Roaming\MicrosoftDoc.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:2012
    - - C:\Users\Admin\AppData\Roaming\MicrosoftDoc.exe
        
        "C:\Users\Admin\AppData\Roaming\MicrosoftDoc.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1304

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/832-59-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/832-61-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/832-60-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/832-58-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/832-63-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/832-64-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/832-66-0x0000000004BF0000-0x0000000004BF1000-memory.dmp

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memory/1304-80-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1304-82-0x00000000021B0000-0x00000000021B1000-memory.dmp

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memory/1304-87-0x0000000000BC0000-0x0000000000BE2000-memory.dmp

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memory/1304-86-0x0000000005660000-0x00000000056C0000-memory.dmp

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memory/1304-85-0x0000000006090000-0x0000000006120000-memory.dmp

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memory/1304-84-0x0000000000830000-0x000000000083A000-memory.dmp

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memory/1304-83-0x0000000005D10000-0x0000000005D8E000-memory.dmp

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memory/1668-62-0x0000000000880000-0x0000000000881000-memory.dmp

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memory/1668-57-0x0000000000530000-0x0000000000546000-memory.dmp

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memory/1668-54-0x0000000000A60000-0x0000000000AB0000-memory.dmp

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memory/1668-55-0x0000000000A20000-0x0000000000A50000-memory.dmp

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memory/1668-56-0x0000000075B51000-0x0000000075B53000-memory.dmp

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memory/2012-73-0x00000000003C0000-0x00000000003D6000-memory.dmp

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memory/2012-71-0x00000000009C0000-0x0000000000A10000-memory.dmp

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