Analysis
- max time kernel
152s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
06/03/2024, 22:27
General
- Target a2c7b7cc8423b1efec7868a8448730790a86a5fe45603441ed492131d197adeb.exe
- Size 1.2MB
- Sample240306-2c6j2sca5w
- SHA256 a2c7b7cc8423b1efec7868a8448730790a86a5fe45603441ed492131d197adeb
Malware Config
Signatures
- Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
- r77
r77 is an open-source, userland rootkit.
- r77 rootkit payload 1 IoCs
Detects the payload of the r77 rootkit.
- Executes dropped EXE 6 IoCs
- Adds Run key to start application 2 TTPs 4 IoCs
- Drops file in System32 directory 2 IoCs
- Drops file in Windows directory 5 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 12 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\a2c7b7cc8423b1efec7868a8448730790a86a5fe45603441ed492131d197adeb.exe"C:\Users\Admin\AppData\Local\Temp\a2c7b7cc8423b1efec7868a8448730790a86a5fe45603441ed492131d197adeb.exe"1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\users\admin\appdata\local\temp\a2c7b7cc8423b1efec7868a8448730790a86a5fe45603441ed492131d197adeb.exec:\users\admin\appdata\local\temp\a2c7b7cc8423b1efec7868a8448730790a86a5fe45603441ed492131d197adeb.exe2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\Resources\Themes\icsys.icn.exeC:\Windows\Resources\Themes\icsys.icn.exe2⤵
- Executes dropped EXE
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\resources\themes\explorer.exec:\windows\resources\themes\explorer.exe3⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\resources\spoolsv.exec:\windows\resources\spoolsv.exe SE4⤵
- Executes dropped EXE
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\resources\svchost.exec:\windows\resources\svchost.exe5⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\resources\spoolsv.exec:\windows\resources\spoolsv.exe PR6⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3940 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
a2c7b7cc8423b1efec7868a8448730790a86a5fe45603441ed492131d197adeb.exe
explorer.exe
icsys.icn.exe
spoolsv.exe
svchost.exe
memory/1132-0-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1132-52-0x0000000000400000-0x000000000041F000-memory.dmp
memory/3308-10-0x00007FF9838B0000-0x00007FF984371000-memory.dmp
memory/3308-55-0x00007FF9838B0000-0x00007FF984371000-memory.dmp
memory/3308-13-0x000002574BC80000-0x000002574BC90000-memory.dmp
memory/3308-12-0x000002574BC80000-0x000002574BC90000-memory.dmp
memory/3308-11-0x000002574BC80000-0x000002574BC90000-memory.dmp
memory/3308-9-0x000002574B890000-0x000002574B8C2000-memory.dmp
memory/3308-54-0x000002574BC80000-0x000002574BC90000-memory.dmp
memory/3308-53-0x000002574BC80000-0x000002574BC90000-memory.dmp
memory/4852-49-0x0000000000400000-0x000000000041F000-memory.dmp
memory/4940-51-0x0000000000400000-0x000000000041F000-memory.dmp
memory/4940-17-0x0000000000400000-0x000000000041F000-memory.dmp
memory/5048-50-0x0000000000400000-0x000000000041F000-memory.dmp