Analysis
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max time kernel
149s -
max time network
152s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
16-04-2024 21:53
Behavioral task
behavioral1
Sample
assssss.exe
Resource
win7-20240221-en
General
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Target
assssss.exe
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Size
74KB
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MD5
00633c71d9fa6e703dacc8c6266b2613
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SHA1
c673396470a64a46c5c96643aa7558a35722faf2
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SHA256
cef1b063659f6f90cb4a3d0dc14295919ea7c11020918d9c3a01a7705dd2e175
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SHA512
840a93b7d5e992176f672618b8f4f23f0e697093656914525229555970dd91c19ceec1996d6d00d5ca372b029e944164d73d36d19994ad5c435618b6efa8f0cf
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SSDEEP
1536:eUYccx0dxCKg6PMV1QKI/H1bz/uVSjhaQzcaLVclN:eUlcx0f9g6PMV1QzH1bzW6haQLBY
Malware Config
Extracted
asyncrat
Venom RAT + HVNC + Stealer + Grabber v6.0.3
Default
66.66.146.74:9511
kvudvdwyjbukkqcnuoq
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delay
1
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install
true
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install_file
Windows Host.exe
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install_folder
%Temp%
Signatures
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Async RAT payload 1 IoCs
resource yara_rule behavioral1/files/0x0032000000013a14-17.dat family_asyncrat -
Executes dropped EXE 1 IoCs
pid Process 2532 Windows Host.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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 2496 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 2476 timeout.exe -
Suspicious behavior: EnumeratesProcesses 33 IoCs
pid Process 2184 assssss.exe 2184 assssss.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe 2532 Windows Host.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2184 assssss.exe Token: SeDebugPrivilege 2532 Windows Host.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2532 Windows Host.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 2184 wrote to memory of 2464 2184 assssss.exe 28 PID 2184 wrote to memory of 2464 2184 assssss.exe 28 PID 2184 wrote to memory of 2464 2184 assssss.exe 28 PID 2184 wrote to memory of 2588 2184 assssss.exe 30 PID 2184 wrote to memory of 2588 2184 assssss.exe 30 PID 2184 wrote to memory of 2588 2184 assssss.exe 30 PID 2464 wrote to memory of 2496 2464 cmd.exe 32 PID 2464 wrote to memory of 2496 2464 cmd.exe 32 PID 2464 wrote to memory of 2496 2464 cmd.exe 32 PID 2588 wrote to memory of 2476 2588 cmd.exe 33 PID 2588 wrote to memory of 2476 2588 cmd.exe 33 PID 2588 wrote to memory of 2476 2588 cmd.exe 33 PID 2588 wrote to memory of 2532 2588 cmd.exe 34 PID 2588 wrote to memory of 2532 2588 cmd.exe 34 PID 2588 wrote to memory of 2532 2588 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\assssss.exe"C:\Users\Admin\AppData\Local\Temp\assssss.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2184 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Host" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
PID:2464 -
C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "Windows Host" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"'3⤵
- Creates scheduled task(s)
PID:2496
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C:\Windows\system32\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3BE8.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
PID:2588 -
C:\Windows\system32\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
PID:2476
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C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2532
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
68KB
MD529f65ba8e88c063813cc50a4ea544e93
SHA105a7040d5c127e68c25d81cc51271ffb8bef3568
SHA2561ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
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Filesize
177KB
MD5435a9ac180383f9fa094131b173a2f7b
SHA176944ea657a9db94f9a4bef38f88c46ed4166983
SHA25667dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
SHA5121a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a
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Filesize
74KB
MD500633c71d9fa6e703dacc8c6266b2613
SHA1c673396470a64a46c5c96643aa7558a35722faf2
SHA256cef1b063659f6f90cb4a3d0dc14295919ea7c11020918d9c3a01a7705dd2e175
SHA512840a93b7d5e992176f672618b8f4f23f0e697093656914525229555970dd91c19ceec1996d6d00d5ca372b029e944164d73d36d19994ad5c435618b6efa8f0cf
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Filesize
159B
MD58067a44f9c897d86d34c8e607d82c0d8
SHA10584529a762f5ad6e2dd274aab75dd62e9ae8753
SHA256eeed5f28012c30438585580bb6dc56461a8b1e2058894befc4be8551f6ebe9d8
SHA512a52e65a6d2d972ea39c60d2b162b1fc8d058c049d21645ea3886c02221aa08b9d39cc4bc6c7fd6e4d7f0426a5ac463372c51fdc04ce846c384fdde0920bc0f73
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Filesize
8B
MD5cf759e4c5f14fe3eec41b87ed756cea8
SHA1c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA256c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
SHA512c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b