Analysis
- max time kernel
149s - max time network
146s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
- submitted
22/10/2022, 12:19
General
- Target file.exe
- Size 2.4MB
- Sample221022-pg6pdsdcam
- SHA256 29d0d0af15f9d90c7836af236faccd44a7ffc930b2d5a0591ad9b671c5ac62e0
Malware Config
Extracted
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nymaim
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45.139.105.171
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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
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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-ROO9M.tmp\is-9EV8R.tmp"C:\Users\Admin\AppData\Local\Temp\is-ROO9M.tmp\is-9EV8R.tmp" /SL4 $60120 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2258141 527362⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\epSearcher\epsearcher56.exe"C:\Program Files (x86)\epSearcher\epsearcher56.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}\CGFw52am32aE1.exe4⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "epsearcher56.exe" /f & erase "C:\Program Files (x86)\epSearcher\epsearcher56.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im "epsearcher56.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
epsearcher56.exe
epsearcher56.exe
is-9EV8R.tmp
is-9EV8R.tmp
CGFw52am32aE1.exe
epsearcher56.exe
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
is-9EV8R.tmp
CGFw52am32aE1.exe
memory/1020-54-0x0000000075981000-0x0000000075983000-memory.dmp
memory/1020-55-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1020-86-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1020-58-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1120-74-0x00000000030E0000-0x00000000042D4000-memory.dmp
memory/1120-69-0x00000000030E0000-0x00000000042D4000-memory.dmp
memory/1408-79-0x0000000010000000-0x000000001001B000-memory.dmp
memory/1408-75-0x0000000000400000-0x00000000015F4000-memory.dmp
memory/1408-73-0x0000000000400000-0x00000000015F4000-memory.dmp
memory/1408-85-0x0000000000400000-0x00000000015F4000-memory.dmp
memory/1408-71-0x0000000000400000-0x00000000015F4000-memory.dmp
memory/1408-70-0x0000000000400000-0x00000000015F4000-memory.dmp