Analysis
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max time kernel
145s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
21/03/2023, 02:40
Behavioral task
behavioral1
Sample
Testing FR.exe
Resource
win7-20230220-en
General
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Target
Testing FR.exe
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Size
48KB
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MD5
0c2353b8b6923a16f523944d6514bb8f
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SHA1
d66baa60bcfbc057466b3ca0ef3076c5fd02210b
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SHA256
c69b81e6499b64d01ed7b231985f9061e8553309cbd64b00d1699e71d58fd4c3
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SHA512
857a0dbf2cd41349d72df6a68ad4743bd1d0b2cbdf245be4e3abda10e0323678beb5d0b78ebd968db751a3de58b924e792f64cc6ca1e7b0f27b42869179c979d
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SSDEEP
768:OV9TQo2oIL4+M0+Li4ciiyYb1ge6eez+/vEgK/J8AmVc6KN:OVpQoVsbRbSlnz+/nkJ8AmVclN
Malware Config
Extracted
asyncrat
1.0.7
Default
127.0.0.1:8809
thebest39393.ddns.net:8809
DcRatMutex_qwqdanchun
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delay
1
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install
true
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install_file
Microsoft Services.exe
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install_folder
%AppData%
Signatures
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Async RAT payload 3 IoCs
resource yara_rule behavioral2/memory/4872-133-0x0000000000500000-0x0000000000512000-memory.dmp asyncrat behavioral2/files/0x000a00000002313b-142.dat asyncrat behavioral2/files/0x000a00000002313b-141.dat asyncrat -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation Testing FR.exe -
Executes dropped EXE 1 IoCs
pid Process 972 Microsoft Services.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3468 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 1200 timeout.exe -
Suspicious behavior: EnumeratesProcesses 23 IoCs
pid Process 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe 4872 Testing FR.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4872 Testing FR.exe Token: SeDebugPrivilege 972 Microsoft Services.exe -
Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 4872 wrote to memory of 2440 4872 Testing FR.exe 85 PID 4872 wrote to memory of 2440 4872 Testing FR.exe 85 PID 4872 wrote to memory of 3376 4872 Testing FR.exe 86 PID 4872 wrote to memory of 3376 4872 Testing FR.exe 86 PID 3376 wrote to memory of 1200 3376 cmd.exe 89 PID 3376 wrote to memory of 1200 3376 cmd.exe 89 PID 2440 wrote to memory of 3468 2440 cmd.exe 90 PID 2440 wrote to memory of 3468 2440 cmd.exe 90 PID 3376 wrote to memory of 972 3376 cmd.exe 94 PID 3376 wrote to memory of 972 3376 cmd.exe 94 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\Testing FR.exe"C:\Users\Admin\AppData\Local\Temp\Testing FR.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4872 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Microsoft Services" /tr '"C:\Users\Admin\AppData\Roaming\Microsoft Services.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
PID:2440 -
C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "Microsoft Services" /tr '"C:\Users\Admin\AppData\Roaming\Microsoft Services.exe"'3⤵
- Creates scheduled task(s)
PID:3468
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7823.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
PID:3376 -
C:\Windows\system32\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
PID:1200
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C:\Users\Admin\AppData\Roaming\Microsoft Services.exe"C:\Users\Admin\AppData\Roaming\Microsoft Services.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:972
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
162B
MD5457aeb2377c735737a952ade1c443d6a
SHA146e485ca27d035aeff795d756f2c31547aa83a4d
SHA2564ea8c80ae215bc81d056d1185364d29c45bb86f58345dea823a0a26318457aa7
SHA5128b3f979e74fb47927bff8c51d29fca4eb9e93536a1315b578faadfcb149c36f4a277d7e959d842ab9d713ddb84119fefc41921e3c1c467ecb0b36edfd3794003
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Filesize
48KB
MD50c2353b8b6923a16f523944d6514bb8f
SHA1d66baa60bcfbc057466b3ca0ef3076c5fd02210b
SHA256c69b81e6499b64d01ed7b231985f9061e8553309cbd64b00d1699e71d58fd4c3
SHA512857a0dbf2cd41349d72df6a68ad4743bd1d0b2cbdf245be4e3abda10e0323678beb5d0b78ebd968db751a3de58b924e792f64cc6ca1e7b0f27b42869179c979d
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Filesize
48KB
MD50c2353b8b6923a16f523944d6514bb8f
SHA1d66baa60bcfbc057466b3ca0ef3076c5fd02210b
SHA256c69b81e6499b64d01ed7b231985f9061e8553309cbd64b00d1699e71d58fd4c3
SHA512857a0dbf2cd41349d72df6a68ad4743bd1d0b2cbdf245be4e3abda10e0323678beb5d0b78ebd968db751a3de58b924e792f64cc6ca1e7b0f27b42869179c979d