Analysis
- max time kernel
83s - max time network
88s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
- submitted
31/10/2022, 04:17
General
- Target file.exe
- Size 2.5MB
- Sample221031-ewc1hsaba4
- SHA256 d6f5d3df2c9338d58013f95c46b4aae918ecbf1d543c02454d491310baaf36a6
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 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
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-4NFEU.tmp\is-NJR7A.tmp"C:\Users\Admin\AppData\Local\Temp\is-4NFEU.tmp\is-NJR7A.tmp" /SL4 $60124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2342840 527362⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\fhSearcher\fhsearcher65.exe"C:\Program Files (x86)\fhSearcher\fhsearcher65.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\iTAXgOM.exe4⤵
- Executes dropped EXE
-
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "fhsearcher65.exe" /f & erase "C:\Program Files (x86)\fhSearcher\fhsearcher65.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\taskkill.exetaskkill /im "fhsearcher65.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
-
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
fhsearcher65.exe
fhsearcher65.exe
is-NJR7A.tmp
is-NJR7A.tmp
iTAXgOM.exe
fhsearcher65.exe
is-NJR7A.tmp
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
iTAXgOM.exe
memory/1208-65-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1208-54-0x0000000075D01000-0x0000000075D03000-memory.dmp
memory/1208-87-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1208-55-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1732-70-0x00000000030E0000-0x0000000004282000-memory.dmp
memory/1732-77-0x00000000030E0000-0x0000000004282000-memory.dmp
memory/1756-71-0x0000000000400000-0x00000000015A2000-memory.dmp
memory/1756-78-0x0000000000400000-0x00000000015A2000-memory.dmp
memory/1756-79-0x0000000010000000-0x000000001001B000-memory.dmp
memory/1756-83-0x0000000000400000-0x00000000015A2000-memory.dmp
memory/1756-73-0x0000000000400000-0x00000000015A2000-memory.dmp
memory/1756-86-0x0000000000400000-0x00000000015A2000-memory.dmp
memory/1756-72-0x0000000000400000-0x00000000015A2000-memory.dmp