Analysis
- max time kernel
64s - max time network
67s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
- submitted
17/11/2022, 10:17
General
- Target file.exe
- Size 1.9MB
- Sample221117-mbc4saeb55
- SHA256 c939aa265f52289652b2e8c18e823c5c448363c4028f96d417fba457592322b2
Malware Config
Extracted
-
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.
- 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-N6R77.tmp\is-QUF8B.tmp"C:\Users\Admin\AppData\Local\Temp\is-N6R77.tmp\is-QUF8B.tmp" /SL4 $60122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1782226 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 use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\GMjS7ykzgvI.exe4⤵
- Executes dropped EXE
-
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "gpsearcher82.exe" /f & erase "C:\Program Files (x86)\gpSearcher\gpsearcher82.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im "gpsearcher82.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
gpsearcher82.exe
gpsearcher82.exe
is-QUF8B.tmp
is-QUF8B.tmp
GMjS7ykzgvI.exe
gpsearcher82.exe
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
is-QUF8B.tmp
GMjS7ykzgvI.exe
memory/784-65-0x0000000000400000-0x0000000000414000-memory.dmp
memory/784-87-0x0000000000400000-0x0000000000414000-memory.dmp
memory/784-54-0x0000000075FC1000-0x0000000075FC3000-memory.dmp
memory/784-55-0x0000000000400000-0x0000000000414000-memory.dmp
memory/940-70-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/940-73-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/940-71-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/940-78-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/940-79-0x0000000010000000-0x000000001001B000-memory.dmp
memory/940-83-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/940-86-0x0000000000400000-0x00000000014A3000-memory.dmp
memory/1428-77-0x0000000003230000-0x00000000042D3000-memory.dmp
memory/1428-69-0x0000000003230000-0x00000000042D3000-memory.dmp