Analysis
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max time kernel
96s -
max time network
94s -
platform
windows7_x64 -
resource
win7v20210410 -
submitted
20-04-2021 12:02
Static task
static1
Behavioral task
behavioral1
Sample
46ddcd557521e886e2548e72097e01d6.exe
Resource
win7v20210410
Behavioral task
behavioral2
Sample
46ddcd557521e886e2548e72097e01d6.exe
Resource
win10v20210408
General
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Target
46ddcd557521e886e2548e72097e01d6.exe
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Size
262KB
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MD5
46ddcd557521e886e2548e72097e01d6
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SHA1
fd4f34bc1ee6df6d2d04860b2b39349ee6221bf7
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SHA256
3163e680a9b1c5c3b4e64b0fe808b79c5090a69bb3a359fbe18bbf9064dc4517
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SHA512
79abb9091c52d225c57db429727b164f5f8ee1de03a597592c42f57f32281a26bc4d400fc670553b8e34697575558616e971fbf81d5901a8007315452ba84071
Malware Config
Extracted
oski
orisinlog.com
Signatures
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Oski
Oski is an infostealer targeting browser data, crypto wallets.
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Deletes itself 1 IoCs
Processes:
cmd.exepid process 436 cmd.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
46ddcd557521e886e2548e72097e01d6.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\note = "\"C:\\Users\\Admin\\AppData\\Local\\note.exe\"" 46ddcd557521e886e2548e72097e01d6.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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Suspicious use of SetThreadContext 1 IoCs
Processes:
46ddcd557521e886e2548e72097e01d6.exedescription pid process target process PID 308 set thread context of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
46ddcd557521e886e2548e72097e01d6.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 46ddcd557521e886e2548e72097e01d6.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 1260 taskkill.exe -
NTFS ADS 11 IoCs
Processes:
46ddcd557521e886e2548e72097e01d6.exedescription ioc process File created C:\ProgramData\298890571656689\_ text-align: center.zip 46ddcd557521e886e2548e72097e01d6.exe File created C:\ProgramData\298890571656689\_ font-size: 14px.zip 46ddcd557521e886e2548e72097e01d6.exe File created C:\ProgramData\298890571656689\_ margin: 14px auto.zip 46ddcd557521e886e2548e72097e01d6.exe File created C:\ProgramData\298890571656689\_ background-color: #1a73e8.zip 46ddcd557521e886e2548e72097e01d6.exe File created C:\ProgramData\298890571656689\_<!DOCTYPE html><html lang="ru" dir="ltr"><head><style nonce="TZZgzAQcuc1iBGZJmLv1nA"> a, a:link, a:visited, a:active, a:hover { color: #1a73e8.zip 46ddcd557521e886e2548e72097e01d6.exe File created C:\ProgramData\298890571656689\_ -webkit-text-size-adjust: 100.zip 46ddcd557521e886e2548e72097e01d6.exe File created C:\ProgramData\298890571656689\_ border-radius: 8px.zip 46ddcd557521e886e2548e72097e01d6.exe File created C:\ProgramData\298890571656689\_ padding: 24px.zip 46ddcd557521e886e2548e72097e01d6.exe File created C:\ProgramData\298890571656689\_ hyphens: auto.zip 46ddcd557521e886e2548e72097e01d6.exe File created C:\ProgramData\298890571656689\_ text-align: left.zip 46ddcd557521e886e2548e72097e01d6.exe File created C:\ProgramData\298890571656689\_ cursor: pointer.zip 46ddcd557521e886e2548e72097e01d6.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
46ddcd557521e886e2548e72097e01d6.exepid process 308 46ddcd557521e886e2548e72097e01d6.exe 308 46ddcd557521e886e2548e72097e01d6.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
46ddcd557521e886e2548e72097e01d6.exetaskkill.exedescription pid process Token: SeDebugPrivilege 308 46ddcd557521e886e2548e72097e01d6.exe Token: SeDebugPrivilege 1260 taskkill.exe -
Suspicious use of WriteProcessMemory 18 IoCs
Processes:
46ddcd557521e886e2548e72097e01d6.exe46ddcd557521e886e2548e72097e01d6.execmd.exedescription pid process target process PID 308 wrote to memory of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe PID 308 wrote to memory of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe PID 308 wrote to memory of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe PID 308 wrote to memory of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe PID 308 wrote to memory of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe PID 308 wrote to memory of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe PID 308 wrote to memory of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe PID 308 wrote to memory of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe PID 308 wrote to memory of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe PID 308 wrote to memory of 1596 308 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe PID 1596 wrote to memory of 436 1596 46ddcd557521e886e2548e72097e01d6.exe cmd.exe PID 1596 wrote to memory of 436 1596 46ddcd557521e886e2548e72097e01d6.exe cmd.exe PID 1596 wrote to memory of 436 1596 46ddcd557521e886e2548e72097e01d6.exe cmd.exe PID 1596 wrote to memory of 436 1596 46ddcd557521e886e2548e72097e01d6.exe cmd.exe PID 436 wrote to memory of 1260 436 cmd.exe taskkill.exe PID 436 wrote to memory of 1260 436 cmd.exe taskkill.exe PID 436 wrote to memory of 1260 436 cmd.exe taskkill.exe PID 436 wrote to memory of 1260 436 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe"C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exeC:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe2⤵
- Checks processor information in registry
- NTFS ADS
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /pid 1596 & erase C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe & RD /S /Q C:\\ProgramData\\298890571656689\\* & exit3⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 15964⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/308-60-0x0000000000B60000-0x0000000000B61000-memory.dmpFilesize
4KB
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memory/308-62-0x00000000003F0000-0x00000000003F2000-memory.dmpFilesize
8KB
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memory/308-63-0x0000000004940000-0x0000000004941000-memory.dmpFilesize
4KB
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memory/308-64-0x00000000046A0000-0x00000000046DE000-memory.dmpFilesize
248KB
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memory/436-69-0x0000000000000000-mapping.dmp
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memory/1260-70-0x0000000000000000-mapping.dmp
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memory/1596-66-0x000000000040717B-mapping.dmp
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memory/1596-65-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/1596-67-0x0000000075A31000-0x0000000075A33000-memory.dmpFilesize
8KB
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memory/1596-68-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB