asyncrat | 07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8

General

Target
67e32a73f545f56e1292d6b318f8e3c4.exe
Size 47KB
Sample240804-sdhpyaxgnk
SHA256 07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8
MD5 67e32a73f545f56e1292d6b318f8e3c4
SHA1 96ca16f9a5b6e359f0dccfa0d6c7532ff047da09
SHA512 5ab019270b836231ba7f8b9a5c60bececc02a461f8978424708c7d8460c09347a5a8a1a3ee3b2b54f87a4faf0a4216c9d5e9ccf06dddd932fb93195a4c0df644
SSDEEP 768:guwpFTAY3IQWUe9jqmo2qLj4Q3ijkBPI6Lvl1T0bg7J3HvcNv8OBDZQx:guwpFTA4/2W7Ve6LvlKbg7ZP+bdQx
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

176.111.174.140:6606
176.111.174.140:7707
176.111.174.140:8808

Mutex

QaF6X2cpj8fc

Attributes

delay
3
install
true
install_file
svchost.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/0x000c000000014132-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
3000	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
2872	cmd.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 6 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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	67e32a73f545f56e1292d6b318f8e3c4.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	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1820	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
2792	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2388	67e32a73f545f56e1292d6b318f8e3c4.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2388	67e32a73f545f56e1292d6b318f8e3c4.exe
Token: SeDebugPrivilege	3000	svchost.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 2472	2388	67e32a73f545f56e1292d6b318f8e3c4.exe	29
PID 2388 wrote to memory of 2472	2388	67e32a73f545f56e1292d6b318f8e3c4.exe	29
PID 2388 wrote to memory of 2472	2388	67e32a73f545f56e1292d6b318f8e3c4.exe	29
PID 2388 wrote to memory of 2472	2388	67e32a73f545f56e1292d6b318f8e3c4.exe	29
PID 2388 wrote to memory of 2872	2388	67e32a73f545f56e1292d6b318f8e3c4.exe	31
PID 2388 wrote to memory of 2872	2388	67e32a73f545f56e1292d6b318f8e3c4.exe	31
PID 2388 wrote to memory of 2872	2388	67e32a73f545f56e1292d6b318f8e3c4.exe	31
PID 2388 wrote to memory of 2872	2388	67e32a73f545f56e1292d6b318f8e3c4.exe	31
PID 2472 wrote to memory of 2792	2472	cmd.exe	33
PID 2472 wrote to memory of 2792	2472	cmd.exe	33
PID 2472 wrote to memory of 2792	2472	cmd.exe	33
PID 2472 wrote to memory of 2792	2472	cmd.exe	33
PID 2872 wrote to memory of 1820	2872	cmd.exe	34
PID 2872 wrote to memory of 1820	2872	cmd.exe	34
PID 2872 wrote to memory of 1820	2872	cmd.exe	34
PID 2872 wrote to memory of 1820	2872	cmd.exe	34
PID 2872 wrote to memory of 3000	2872	cmd.exe	35
PID 2872 wrote to memory of 3000	2872	cmd.exe	35
PID 2872 wrote to memory of 3000	2872	cmd.exe	35
PID 2872 wrote to memory of 3000	2872	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\67e32a73f545f56e1292d6b318f8e3c4.exe
"C:\Users\Admin\AppData\Local\Temp\67e32a73f545f56e1292d6b318f8e3c4.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2472
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2792
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp4930.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2872
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1820
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3000

Network

MITRE ATT&CK Enterprise v15

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

System Information Discovery

1

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

CabCFDF.tmp

Path C:\Users\Admin\AppData\Local\Temp\CabCFDF.tmp
Size 70KB
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
SSDEEP 1536:gc257bHnClJ3v5mnAQEBP+bfnW8Ctl8G1G4eu76NWDdB34w18R5cBWcJAm68+Q:gp2ld5jPqW8LgeulxB3fgcEfDQ
MD5 SHA1 SHA512 SSDEEP

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tmp4930.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4930.tmp.bat
Size 151B
SHA256 d0587a87696278c16c81dbfd207d8fbed9a5ecb81513afc03ad4136674eeea10
MD5 5ece48f27130dfb4fafbec812511794e
SHA1 2d73361ce8c314137989b2a1939381e576b3692f
SHA512 47a6f29f86feaf202f521b4d53e7e2f1d04aa12964dc75bc98bf689d41d81b026ff49065bf882772a413afdbf5376dbcc9b1028406e9f4f078e613380f6f5f41
MD5 SHA1 SHA512

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svchost.exe

Path \Users\Admin\AppData\Roaming\svchost.exe
Size 47KB
SHA256 07d35c2c242d2c2a7bbf3d70315f7679c90b3f5a32b2ff542fdfca8a0b9cb4c8
MD5 67e32a73f545f56e1292d6b318f8e3c4
SHA1 96ca16f9a5b6e359f0dccfa0d6c7532ff047da09
SHA512 5ab019270b836231ba7f8b9a5c60bececc02a461f8978424708c7d8460c09347a5a8a1a3ee3b2b54f87a4faf0a4216c9d5e9ccf06dddd932fb93195a4c0df644
SSDEEP 768:guwpFTAY3IQWUe9jqmo2qLj4Q3ijkBPI6Lvl1T0bg7J3HvcNv8OBDZQx:guwpFTA4/2W7Ve6LvlKbg7ZP+bdQx
MD5 SHA1 SHA512 SSDEEP

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memory/2388-0-0x000000007451E000-0x000000007451F000-memory.dmp

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memory/2388-1-0x0000000000C00000-0x0000000000C12000-memory.dmp

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memory/2388-2-0x0000000074510000-0x0000000074BFE000-memory.dmp

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memory/2388-11-0x0000000074510000-0x0000000074BFE000-memory.dmp

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memory/3000-16-0x00000000001B0000-0x00000000001C2000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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