Analysis
- max time kernel
153s - max time network
193s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
13/10/2022, 23:18
General
- Target file.exe
- Size 2.4MB
- Sample221013-2982faadc3
- SHA256 34a2e913ec0c367dcf1f5ce6982c5121ace66a171393e99da97e4a7939051e9b
Malware Config
Extracted
-
nymaim
-
45.15.156.54
-
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 1 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 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-KIC0P.tmp\is-Q4RID.tmp"C:\Users\Admin\AppData\Local\Temp\is-KIC0P.tmp\is-Q4RID.tmp" /SL4 $701E2 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2269719 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)\dwSearcher\dwsearcher47.exe"C:\Program Files (x86)\dwSearcher\dwsearcher47.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\1FYHE.exe4⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
dwsearcher47.exe
dwsearcher47.exe
_iscrypt.dll
is-Q4RID.tmp
is-Q4RID.tmp
1FYHE.exe
1FYHE.exe
memory/4320-142-0x0000000000400000-0x00000000015F9000-memory.dmp
memory/4320-143-0x0000000000400000-0x00000000015F9000-memory.dmp
memory/4320-144-0x0000000000400000-0x00000000015F9000-memory.dmp
memory/4320-145-0x0000000000400000-0x00000000015F9000-memory.dmp
memory/4532-132-0x0000000000400000-0x0000000000414000-memory.dmp
memory/4532-134-0x0000000000400000-0x0000000000414000-memory.dmp