Analysis
- max time kernel
87s - max time network
150s - platform
windows10_x64 - resource
win10v20210410 - submitted
22/06/2021, 06:46
General
- Target New Requirement.xll.dll
- Size 3KB
- Sample210622-8d3k2gm3rx
- SHA256 e6a2f552058a99fa28330c628b275808c3cb048cabb0127cf2c1a56c94976a30
Malware Config
Signatures
- RedLine
RedLine Stealer is a malware family written in C#, first appearing in early 2020.
- RedLine Payload 2 IoCs
- Blocklisted process makes network request 5 IoCs
- Downloads MZ/PE file
- Executes dropped EXE 3 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe "C:\Users\Admin\AppData\Local\Temp\New Requirement.xll.dll",#11⤵
- Blocklisted process makes network request
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Microsoft Visual C++ 2012 Redistributable (x86) - 11.0.61030.exe"C:\Users\Admin\AppData\Local\Temp\Microsoft Visual C++ 2012 Redistributable (x86) - 11.0.61030.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Microsoft Visual C++ 2012 Redistributable (x86) - 11.0.61030.exe"C:\Users\Admin\AppData\Local\Temp\Microsoft Visual C++ 2012 Redistributable (x86) - 11.0.61030.exe"3⤵
- Executes dropped EXE
-
-
C:\Users\Admin\AppData\Local\Temp\Microsoft Visual C++ 2012 Redistributable (x86) - 11.0.61030.exe"C:\Users\Admin\AppData\Local\Temp\Microsoft Visual C++ 2012 Redistributable (x86) - 11.0.61030.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/3692-127-0x0000000005CF0000-0x0000000005CF1000-memory.dmp
memory/3692-132-0x0000000005A60000-0x0000000005A61000-memory.dmp
memory/3692-137-0x0000000007D40000-0x0000000007D41000-memory.dmp
memory/3692-136-0x00000000071A0000-0x00000000071A1000-memory.dmp
memory/3692-135-0x0000000006E90000-0x0000000006E91000-memory.dmp
memory/3692-128-0x0000000005760000-0x0000000005761000-memory.dmp
memory/3692-129-0x00000000057C0000-0x00000000057C1000-memory.dmp
memory/3692-130-0x0000000001870000-0x0000000001871000-memory.dmp
memory/3692-131-0x0000000005800000-0x0000000005801000-memory.dmp
memory/3692-121-0x0000000000400000-0x000000000041E000-memory.dmp
memory/3692-133-0x0000000006C10000-0x0000000006C11000-memory.dmp
memory/3692-134-0x0000000007310000-0x0000000007311000-memory.dmp
memory/3792-117-0x0000000000A30000-0x0000000000A31000-memory.dmp
memory/3792-119-0x0000000001300000-0x0000000001301000-memory.dmp