Analysis
- max time kernel
101s - max time network
133s - platform
windows10-2004_x64 - resource
win10v2004-20231222-en - resource tags
- submitted
02/02/2024, 03:33
General
- Target PURCHASE ORDER AZAS112.xls.xll
- Size 880KB
- Sample240202-d4e96sfbcq
- SHA256 6c67e1ccf77b872b1f3cf257a257d75c4995dc079945080f578b51357ccdbe55
Malware Config
Extracted
-
xlm4.0
Extracted
-
oski
-
himarkh.xyz
Signatures
- Oski
Oski is an infostealer targeting browser data, crypto wallets.
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 2 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Suspicious use of SetThreadContext 1 IoCs
- Program crash 1 IoCs
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 3 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of FindShellTrayWindow 2 IoCs
- Suspicious use of SetWindowsHookEx 11 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
Processes
-
C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER AZAS112.xls.xll"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\service.exe"C:\Users\Admin\AppData\Roaming\service.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\service.exe"C:\Users\Admin\AppData\Roaming\service.exe"3⤵
- Executes dropped EXE
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1916 -s 13084⤵
- Program crash
-
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 1916 -ip 19161⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
PURCHASE ORDER AZAS112.xls.xll
PURCHASE ORDER AZAS112.xls.xll
sample.xlsx
service.exe
service.exe
service.exe
service.exe
memory/1916-88-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1916-81-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1916-83-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1916-84-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1916-85-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2920-35-0x000001CA1FB80000-0x000001CA1FC36000-memory.dmp
memory/2920-33-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-10-0x00007FFD5EDA0000-0x00007FFD5EDB0000-memory.dmp
memory/2920-17-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-20-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-19-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-22-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-23-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-21-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-18-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-16-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-15-0x00007FFD5EDA0000-0x00007FFD5EDB0000-memory.dmp
memory/2920-25-0x000001CA03240000-0x000001CA03336000-memory.dmp
memory/2920-13-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-11-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-29-0x000001CA03480000-0x000001CA0349C000-memory.dmp
memory/2920-30-0x000001CA077E0000-0x000001CA0781C000-memory.dmp
memory/2920-31-0x00007FFD79300000-0x00007FFD79DC1000-memory.dmp
memory/2920-34-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-0-0x00007FFD614D0000-0x00007FFD614E0000-memory.dmp
memory/2920-38-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-12-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-39-0x000001CA03540000-0x000001CA03550000-memory.dmp
memory/2920-37-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-36-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-14-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-32-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-4-0x00007FFD614D0000-0x00007FFD614E0000-memory.dmp
memory/2920-6-0x00007FFD614D0000-0x00007FFD614E0000-memory.dmp
memory/2920-9-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-8-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-7-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-5-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-3-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-2-0x00007FFD614D0000-0x00007FFD614E0000-memory.dmp
memory/2920-121-0x00007FFD79300000-0x00007FFD79DC1000-memory.dmp
memory/2920-120-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-1-0x00007FFD614D0000-0x00007FFD614E0000-memory.dmp
memory/2920-94-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-95-0x00007FFDA1450000-0x00007FFDA1645000-memory.dmp
memory/2920-96-0x00007FFD79300000-0x00007FFD79DC1000-memory.dmp
memory/2920-99-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-100-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-98-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-97-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-101-0x000001CA1FB70000-0x000001CA1FB80000-memory.dmp
memory/2920-116-0x00007FFD614D0000-0x00007FFD614E0000-memory.dmp
memory/2920-117-0x00007FFD614D0000-0x00007FFD614E0000-memory.dmp
memory/2920-118-0x00007FFD614D0000-0x00007FFD614E0000-memory.dmp
memory/2920-119-0x00007FFD614D0000-0x00007FFD614E0000-memory.dmp
memory/4636-79-0x0000000000C00000-0x0000000000D00000-memory.dmp
memory/4636-80-0x0000000000EA0000-0x0000000000EA2000-memory.dmp