Analysis
- max time kernel
123s - max time network
144s - platform
windows7_x64 - resource
win7-20221111-en - resource tags
- submitted
17/11/2022, 17:46
General
- Target file.exe
- Size 1.9MB
- Sample221117-wca59afb46
- SHA256 83247078f7b2dbffe83aefe59dcf2790ede41da1e01d88d5a83d2ec871d4b284
Malware Config
Extracted
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nymaim
-
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.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of WriteProcessMemory 15 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-BS0U5.tmp\is-RV5EH.tmp"C:\Users\Admin\AppData\Local\Temp\is-BS0U5.tmp\is-RV5EH.tmp" /SL4 $80022 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1783192 547842⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\gpSearcher\gpsearcher82.exe"C:\Program Files (x86)\gpSearcher\gpsearcher82.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\JzyGBA8W.exe4⤵
- Executes dropped EXE
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-
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
gpsearcher82.exe
is-RV5EH.tmp
is-RV5EH.tmp
JzyGBA8W.exe
gpsearcher82.exe
is-RV5EH.tmp
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
JzyGBA8W.exe
memory/1112-78-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/1112-80-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/1112-70-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/1112-71-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/1112-73-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/1112-79-0x0000000010000000-0x000000001001B000-memory.dmp
memory/1116-69-0x00000000030E0000-0x0000000004183000-memory.dmp
memory/1116-77-0x00000000030E0000-0x0000000004183000-memory.dmp
memory/1756-68-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1756-55-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1756-54-0x0000000076221000-0x0000000076223000-memory.dmp