Analysis
- max time kernel
133s - max time network
176s - platform
windows7_x64 - resource
win7-20221111-en - resource tags
- submitted
04/12/2022, 01:02
General
- Target file.exe
- Size 3.4MB
- Sample221204-bdzvsada33
- SHA256 f6483d7b512d9c1f5715a727ff3afc0d30e4b2fdf654c52efc8286824a31f328
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
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-SU6J0.tmp\is-MSRE5.tmp"C:\Users\Admin\AppData\Local\Temp\is-SU6J0.tmp\is-MSRE5.tmp" /SL4 $80022 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3361597 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\PrintFolders\PrintFolders.exe"C:\Program Files (x86)\PrintFolders\PrintFolders.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RbmVuBoW.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
-
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im "PrintFolders.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
PrintFolders.exe
PrintFolders.exe
is-MSRE5.tmp
is-MSRE5.tmp
RbmVuBoW.exe
RbmVuBoW.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
is-MSRE5.tmp
RbmVuBoW.exe
RbmVuBoW.exe
RbmVuBoW.exe
memory/524-69-0x0000000003250000-0x000000000460D000-memory.dmp
memory/524-76-0x0000000003250000-0x000000000460D000-memory.dmp
memory/636-75-0x0000000001F60000-0x000000000331D000-memory.dmp
memory/636-88-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/636-78-0x0000000001F60000-0x000000000331D000-memory.dmp
memory/636-79-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/636-80-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/636-94-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/636-89-0x0000000010000000-0x000000001001B000-memory.dmp
memory/636-70-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/636-77-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/940-65-0x0000000000400000-0x0000000000413000-memory.dmp
memory/940-55-0x0000000000400000-0x0000000000413000-memory.dmp
memory/940-54-0x00000000760A1000-0x00000000760A3000-memory.dmp
memory/940-95-0x0000000000400000-0x0000000000413000-memory.dmp