Analysis
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max time kernel
119s -
max time network
147s -
platform
windows7_x64 -
resource
win7-20241023-en -
resource tags
arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system -
submitted
27-11-2024 17:07
Behavioral task
behavioral1
Sample
Start.exe
Resource
win7-20241023-en
General
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Target
Start.exe
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Size
45KB
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MD5
b733e729705bf66c1e5c66d97e247701
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SHA1
25eec814abdf1fc6afe621e16aa89c4eb42616b9
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SHA256
9081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023
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SHA512
09b59b8942c1409a03ca4e7f77c6007160af4d557386b766516dba392750869c017d0fd5d6fbbfcbb3e559a70ad42adcb498595df186be180cfc04e921d74320
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SSDEEP
768:Nu2/0TckJ26WUsFvgmo2q7MKjPGaG6PIyzjbFgX3iWlcF4S0ru1pYI0sBDZOx:Nu2/0TceH2ZKTkDy3bCXSWlc6SKuRjdM
Malware Config
Extracted
asyncrat
0.5.8
Default
66.66.146.74:9511
nwJFeGdDXcL2
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delay
3
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install
true
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install_file
System32.exe
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install_folder
%AppData%
Signatures
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Asyncrat family
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Async RAT payload 1 IoCs
resource yara_rule behavioral1/files/0x000c00000001202c-13.dat family_asyncrat -
Executes dropped EXE 1 IoCs
pid Process 2864 System32.exe -
Loads dropped DLL 1 IoCs
pid Process 2216 cmd.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Start.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 Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language timeout.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language System32.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 2120 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.
pid Process 2820 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
pid Process 1720 Start.exe 1720 Start.exe 1720 Start.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1720 Start.exe Token: SeDebugPrivilege 2864 System32.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 1720 wrote to memory of 1760 1720 Start.exe 30 PID 1720 wrote to memory of 1760 1720 Start.exe 30 PID 1720 wrote to memory of 1760 1720 Start.exe 30 PID 1720 wrote to memory of 1760 1720 Start.exe 30 PID 1720 wrote to memory of 2216 1720 Start.exe 32 PID 1720 wrote to memory of 2216 1720 Start.exe 32 PID 1720 wrote to memory of 2216 1720 Start.exe 32 PID 1720 wrote to memory of 2216 1720 Start.exe 32 PID 1760 wrote to memory of 2820 1760 cmd.exe 34 PID 1760 wrote to memory of 2820 1760 cmd.exe 34 PID 1760 wrote to memory of 2820 1760 cmd.exe 34 PID 1760 wrote to memory of 2820 1760 cmd.exe 34 PID 2216 wrote to memory of 2120 2216 cmd.exe 35 PID 2216 wrote to memory of 2120 2216 cmd.exe 35 PID 2216 wrote to memory of 2120 2216 cmd.exe 35 PID 2216 wrote to memory of 2120 2216 cmd.exe 35 PID 2216 wrote to memory of 2864 2216 cmd.exe 36 PID 2216 wrote to memory of 2864 2216 cmd.exe 36 PID 2216 wrote to memory of 2864 2216 cmd.exe 36 PID 2216 wrote to memory of 2864 2216 cmd.exe 36
Processes
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C:\Users\Admin\AppData\Local\Temp\Start.exe"C:\Users\Admin\AppData\Local\Temp\Start.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1720 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "System32" /tr '"C:\Users\Admin\AppData\Roaming\System32.exe"' & exit2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1760 -
C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "System32" /tr '"C:\Users\Admin\AppData\Roaming\System32.exe"'3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2820
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA737.tmp.bat""2⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2216 -
C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:2120
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C:\Users\Admin\AppData\Roaming\System32.exe"C:\Users\Admin\AppData\Roaming\System32.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2864
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
70KB
MD549aebf8cbd62d92ac215b2923fb1b9f5
SHA11723be06719828dda65ad804298d0431f6aff976
SHA256b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
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Filesize
152B
MD507f29dfd553e422ad184a2c27970ee24
SHA1e589193f6eb6741b6fb4e14f4928bf92eabe2343
SHA25619ca48e050f4b15f293c0cbd2d974a8f1b867af95dde88182a7199f7f1d2221d
SHA5123f0ecca66ee44e71837ec346ddaab501c1d54f74b64be202b0a03950da92ecc98007b185aa88a35bc9a67400d635022e06f2eb1a049d79ec313a414690f51d73
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Filesize
45KB
MD5b733e729705bf66c1e5c66d97e247701
SHA125eec814abdf1fc6afe621e16aa89c4eb42616b9
SHA2569081f9cf986ed111d976a07ee26fc2b1b9992301344197d6d3f83fe0d2616023
SHA51209b59b8942c1409a03ca4e7f77c6007160af4d557386b766516dba392750869c017d0fd5d6fbbfcbb3e559a70ad42adcb498595df186be180cfc04e921d74320