Trojan.Siggen32.57993

Technical Information

To ensure autorun and distribution

Creates or modifies the following files

<SYSTEM32>\tasks\updatetask

Malicious functions

Downloads and executes files.

Modifies file system

Creates the following files

%APPDATA%\microsoft\crypto\rsa\s-1-5-21-4226853953-3309226944-3078887307-1000\83aa4cc77f591dfc2374580bbd95f6ba_8cf7b530-613e-439b-a8c5-ccfc0e745400
%HOMEPATH%\.app_cache\updater.exe
%TEMP%\onefile_1260_266220_yx1a4zrpeno\obf_main.dll
%TEMP%\onefile_1260_266220_yx1a4zrpeno\81d243bd2c585b0f4821__mypyc.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_asyncio.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_bz2.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_cffi_backend.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_ctypes.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_decimal.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_elementtree.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_hashlib.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_lzma.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_multiprocessing.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_overlapped.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_queue.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_socket.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_sqlite3.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_ssl.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_uuid.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\_wmi.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\libcrypto-3.dll
%TEMP%\onefile_1260_266220_yx1a4zrpeno\libffi-8.dll
%TEMP%\onefile_1260_266220_yx1a4zrpeno\libssl-3.dll
%TEMP%\onefile_1260_266220_yx1a4zrpeno\pyexpat.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\python3.dll
%TEMP%\onefile_1260_266220_yx1a4zrpeno\python313.dll
%TEMP%\onefile_1260_266220_yx1a4zrpeno\select.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\sqlite3.dll
%TEMP%\onefile_1260_266220_yx1a4zrpeno\unicodedata.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\vcruntime140.dll
%TEMP%\onefile_1260_266220_yx1a4zrpeno\vcruntime140_1.dll
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_arc4.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_salsa20.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_chacha20.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_pkcs1_decode.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_aes.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_aesni.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_arc2.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_blowfish.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_cast.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_cbc.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_cfb.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_ctr.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_des.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_des3.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_ecb.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_eksblowfish.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_ocb.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\cipher\_raw_ofb.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_blake2b.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_blake2s.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_md2.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_md4.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_md5.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_ripemd160.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_sha1.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_sha224.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_sha256.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_sha384.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_sha512.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_ghash_clmul.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_ghash_portable.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_keccak.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\hash\_poly1305.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\math\_modexp.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\protocol\_scrypt.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\publickey\_curve25519.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\publickey\_curve448.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\publickey\_ec_ws.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\publickey\_ed25519.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\publickey\_ed448.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\util\_cpuid_c.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\crypto\util\_strxor.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\certifi\cacert.pem
%TEMP%\onefile_1260_266220_yx1a4zrpeno\charset_normalizer\cd.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\charset_normalizer\md.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\cryptography\hazmat\bindings\_rust.pyd
%TEMP%\onefile_1260_266220_yx1a4zrpeno\psutil\_psutil_windows.pyd
nul
%APPDATA%\update.exe

Network activity

Connects to

'er##4u.com':443
'x1.#.lencr.org':80

TCP

HTTP GET requests

http://x1.#.lencr.org/

Other

'er##4u.com':443

UDP

DNS ASK er##4u.com
DNS ASK x1.#.lencr.org

Miscellaneous

Creates and executes the following

'%HOMEPATH%\.app_cache\updater.exe'
'%HOMEPATH%\.app_cache\updater.exe' -m pip install pycryptodome requests psutil --quiet

Executes the following

'<SYSTEM32>\tasklist.exe'
'<SYSTEM32>\cmd.exe' /c "schtasks /create /tn "UpdateTask" /tr "%APPDATA%\Update.exe" /sc onlogon /f"
'<SYSTEM32>\schtasks.exe' /create /tn "UpdateTask" /tr "%APPDATA%\Update.exe" /sc onlogon /f
'<SYSTEM32>\cmd.exe' /c "ver"
'<SYSTEM32>\cmd.exe' /c "schtasks /create /tn "UpdateTask" /tr "%APPDATA%\Update.exe" /sc onlogon /f"' (with hidden window)
'<SYSTEM32>\cmd.exe' /c "ver"' (with hidden window)