Analysis
- max time kernel
143s - max time network
147s - platform
windows10_x64 - resource
win10v20201028 - submitted
10/11/2020, 10:56
General
- Target 53795ee37d419aeaf540b78881f30d53d47a5d5b83f83b45fba9b5bacdf8bdc8.exe
- Size 221KB
- Sample201110-s6nbstdrmj
- SHA256 53795ee37d419aeaf540b78881f30d53d47a5d5b83f83b45fba9b5bacdf8bdc8
Malware Config
Signatures
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Executes dropped EXE 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Modifies service 2 TTPs 26 IoCs
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 100 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\53795ee37d419aeaf540b78881f30d53d47a5d5b83f83b45fba9b5bacdf8bdc8.exe"C:\Users\Admin\AppData\Local\Temp\53795ee37d419aeaf540b78881f30d53d47a5d5b83f83b45fba9b5bacdf8bdc8.exe"1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\_foldernamelocalappdata_\rasmbmgr32.exe"C:\Users\Admin\AppData\Local\_foldernamelocalappdata_\rasmbmgr32.exe"2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Modifies service
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /tn Admin /tr "\"C:\Users\Admin\AppData\Local\_foldernamelocalappdata_\rasmbmgr32.exe\" arguments" /sc MINUTE /mo 13⤵
- Creates scheduled task(s)
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe"2⤵
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 5 && del "C:\Users\Admin\AppData\Local\Temp\53795ee37d419aeaf540b78881f30d53d47a5d5b83f83b45fba9b5bacdf8bdc8.exe" && del "C:\Users\Admin\AppData\Local\Temp\53795ee37d419aeaf540b78881f30d53d47a5d5b83f83b45fba9b5bacdf8bdc8.exe.config"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
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C:\Windows\system32\wbem\WmiApSrv.exeC:\Windows\system32\wbem\WmiApSrv.exe1⤵
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C:\Users\Admin\AppData\Local\_foldernamelocalappdata_\rasmbmgr32.exeC:\Users\Admin\AppData\Local\_foldernamelocalappdata_\rasmbmgr32.exe arguments1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\_foldernamelocalappdata_\rasmbmgr32.exeC:\Users\Admin\AppData\Local\_foldernamelocalappdata_\rasmbmgr32.exe arguments1⤵
- Executes dropped EXE
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/576-0-0x00007FFC354F0000-0x00007FFC35E90000-memory.dmp
memory/3204-105-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-110-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-93-0x0000000021920000-0x0000000021921000-memory.dmp
memory/3204-94-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-95-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-96-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-97-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-98-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-99-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-100-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-101-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-102-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-103-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-104-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-10-0x0000000021620000-0x0000000021621000-memory.dmp
memory/3204-106-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-107-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-108-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-109-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-14-0x0000000021620000-0x0000000021621000-memory.dmp
memory/3204-111-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-112-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-113-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-114-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-115-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-116-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-117-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-118-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-119-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-120-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-121-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-122-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-123-0x0000000021030000-0x000000002104E000-memory.dmp
memory/3204-6-0x00007FFC354F0000-0x00007FFC35E90000-memory.dmp
memory/4016-125-0x00007FFC354F0000-0x00007FFC35E90000-memory.dmp
memory/4068-128-0x00007FFC354F0000-0x00007FFC35E90000-memory.dmp