Analysis
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max time kernel
133s -
max time network
146s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-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 5 IoCs
resource yara_rule behavioral1/memory/1388-54-0x0000000000AF0000-0x0000000000B02000-memory.dmp asyncrat behavioral1/files/0x000b0000000122e8-66.dat asyncrat behavioral1/files/0x000b0000000122e8-67.dat asyncrat behavioral1/memory/1756-68-0x00000000002D0000-0x00000000002E2000-memory.dmp asyncrat behavioral1/memory/1756-69-0x000000001AF50000-0x000000001AFD0000-memory.dmp asyncrat -
Executes dropped EXE 1 IoCs
pid Process 1756 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 1924 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 472 timeout.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 1388 Testing FR.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1388 Testing FR.exe Token: SeDebugPrivilege 1756 Microsoft Services.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 1388 wrote to memory of 916 1388 Testing FR.exe 28 PID 1388 wrote to memory of 916 1388 Testing FR.exe 28 PID 1388 wrote to memory of 916 1388 Testing FR.exe 28 PID 1388 wrote to memory of 1928 1388 Testing FR.exe 30 PID 1388 wrote to memory of 1928 1388 Testing FR.exe 30 PID 1388 wrote to memory of 1928 1388 Testing FR.exe 30 PID 916 wrote to memory of 1924 916 cmd.exe 33 PID 916 wrote to memory of 1924 916 cmd.exe 33 PID 916 wrote to memory of 1924 916 cmd.exe 33 PID 1928 wrote to memory of 472 1928 cmd.exe 32 PID 1928 wrote to memory of 472 1928 cmd.exe 32 PID 1928 wrote to memory of 472 1928 cmd.exe 32 PID 1928 wrote to memory of 1756 1928 cmd.exe 34 PID 1928 wrote to memory of 1756 1928 cmd.exe 34 PID 1928 wrote to memory of 1756 1928 cmd.exe 34 -
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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1388 -
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:916 -
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:1924
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C:\Windows\system32\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1BDB.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
PID:1928 -
C:\Windows\system32\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
PID:472
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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:1756
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
162B
MD54959e505a839493f0bbe8358195f0c72
SHA179d8f3ddf4dcac2c13dc4d9798e517c56bcf0cf3
SHA256f1a87a1dad274a575804bc2a9e56ea0595ac2f7c560e361ddd051c2cd15a2b98
SHA512be6c46ff0a1cc07f2bf4a569495cfbd8788e5f0b2414cd0416e1a62ceae3d3391598cf5972aba144efd488595700a46b7c866c8ef70db2ab79bf920acda67e89
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Filesize
162B
MD54959e505a839493f0bbe8358195f0c72
SHA179d8f3ddf4dcac2c13dc4d9798e517c56bcf0cf3
SHA256f1a87a1dad274a575804bc2a9e56ea0595ac2f7c560e361ddd051c2cd15a2b98
SHA512be6c46ff0a1cc07f2bf4a569495cfbd8788e5f0b2414cd0416e1a62ceae3d3391598cf5972aba144efd488595700a46b7c866c8ef70db2ab79bf920acda67e89
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Filesize
48KB
MD50c2353b8b6923a16f523944d6514bb8f
SHA1d66baa60bcfbc057466b3ca0ef3076c5fd02210b
SHA256c69b81e6499b64d01ed7b231985f9061e8553309cbd64b00d1699e71d58fd4c3
SHA512857a0dbf2cd41349d72df6a68ad4743bd1d0b2cbdf245be4e3abda10e0323678beb5d0b78ebd968db751a3de58b924e792f64cc6ca1e7b0f27b42869179c979d
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Filesize
48KB
MD50c2353b8b6923a16f523944d6514bb8f
SHA1d66baa60bcfbc057466b3ca0ef3076c5fd02210b
SHA256c69b81e6499b64d01ed7b231985f9061e8553309cbd64b00d1699e71d58fd4c3
SHA512857a0dbf2cd41349d72df6a68ad4743bd1d0b2cbdf245be4e3abda10e0323678beb5d0b78ebd968db751a3de58b924e792f64cc6ca1e7b0f27b42869179c979d