Analysis
- max time kernel
59s - max time network
61s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
- submitted
26/10/2022, 16:47
General
- Target file.exe
- Size 2.3MB
- Sample221026-vahxmsgdar
- SHA256 2b9be5aaa71b18f806a4617dc8bc43c620d0ff19ccd1fe60a0077bc08f875b1b
Malware Config
Extracted
-
nymaim
-
45.139.105.171
-
85.31.46.167
Signatures
- NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 6 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Drops file in Program Files directory 12 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Kills process with taskkill 1 IoCs
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 23 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-FQRHA.tmp\is-MPSO0.tmp"C:\Users\Admin\AppData\Local\Temp\is-FQRHA.tmp\is-MPSO0.tmp" /SL4 $60122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2156784 527362⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\exSearcher\exsearcher60.exe"C:\Program Files (x86)\exSearcher\exsearcher60.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\kQh0Yyz.exe4⤵
- Executes dropped EXE
-
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "exsearcher60.exe" /f & erase "C:\Program Files (x86)\exSearcher\exsearcher60.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\taskkill.exetaskkill /im "exsearcher60.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
-
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
exsearcher60.exe
exsearcher60.exe
is-MPSO0.tmp
is-MPSO0.tmp
kQh0Yyz.exe
exsearcher60.exe
is-MPSO0.tmp
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
kQh0Yyz.exe
memory/1872-81-0x0000000003220000-0x000000000436C000-memory.dmp
memory/1872-69-0x0000000003220000-0x000000000436C000-memory.dmp
memory/1884-54-0x0000000075571000-0x0000000075573000-memory.dmp
memory/1884-68-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1884-87-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1884-55-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1968-70-0x0000000000400000-0x000000000154C000-memory.dmp
memory/1968-77-0x0000000010000000-0x000000001001B000-memory.dmp
memory/1968-71-0x0000000000400000-0x000000000154C000-memory.dmp
memory/1968-82-0x0000000000400000-0x000000000154C000-memory.dmp
memory/1968-83-0x0000000000400000-0x000000000154C000-memory.dmp
memory/1968-73-0x0000000000400000-0x000000000154C000-memory.dmp
memory/1968-86-0x0000000000400000-0x000000000154C000-memory.dmp