Analysis
- max time kernel
59s - max time network
63s - platform
windows7_x64 - resource
win7-20220901-en - resource tags
- submitted
17/12/2022, 08:03
General
- Target file.exe
- Size 2.3MB
- Sample221217-jxpg6abc21
- SHA256 74a9acab7f585bdb88c73285a294c819e96d0ec15245b6e30421edcbbc72e8fd
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 10 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 9 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 3 IoCs
- Suspicious use of WriteProcessMemory 35 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-8FNMI.tmp\is-ICO4V.tmp"C:\Users\Admin\AppData\Local\Temp\is-8FNMI.tmp\is-ICO4V.tmp" /SL4 $70124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2115602 1694722⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\PrintFolders\obFolders.exe"C:\Program Files (x86)\PrintFolders\obFolders.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}\O2OmCARPax.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
-
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "obFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\obFolders.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\taskkill.exetaskkill /im "obFolders.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
-
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
obFolders.exe
obFolders.exe
is-ICO4V.tmp
is-ICO4V.tmp
O2OmCARPax.exe
O2OmCARPax.exe
obFolders.exe
obFolders.exe
obFolders.exe
is-ICO4V.tmp
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
O2OmCARPax.exe
O2OmCARPax.exe
O2OmCARPax.exe
memory/764-92-0x0000000001BD0000-0x0000000002D5A000-memory.dmp
memory/764-94-0x0000000000400000-0x000000000158A000-memory.dmp
memory/764-76-0x0000000001BD0000-0x0000000002D5A000-memory.dmp
memory/764-77-0x0000000000400000-0x000000000158A000-memory.dmp
memory/764-78-0x0000000000400000-0x000000000158A000-memory.dmp
memory/764-99-0x0000000000400000-0x000000000158A000-memory.dmp
memory/764-74-0x0000000000400000-0x000000000158A000-memory.dmp
memory/764-87-0x0000000010000000-0x000000001001B000-memory.dmp
memory/764-93-0x0000000001BD0000-0x0000000002D5A000-memory.dmp
memory/764-75-0x0000000001BD0000-0x0000000002D5A000-memory.dmp
memory/764-91-0x0000000000400000-0x000000000158A000-memory.dmp
memory/1328-54-0x0000000075FE1000-0x0000000075FE3000-memory.dmp
memory/1328-55-0x0000000000400000-0x0000000000430000-memory.dmp
memory/1328-69-0x0000000000400000-0x0000000000430000-memory.dmp
memory/1328-100-0x0000000000400000-0x0000000000430000-memory.dmp
memory/1528-86-0x00000000030A0000-0x000000000422A000-memory.dmp
memory/1528-73-0x00000000030A0000-0x000000000422A000-memory.dmp