General
- Target nnll.zip
- Size 407KB
- Sample230915-hyserscb44
- SHA256 55e93dfebde154676d9f693e2573060366412110e6a7f05088c83b3f40e9a6c1
- MD5 0effd613adf3a4ee0490f2a72ed1f596
- SHA1 f1f9f211fbdc0f9c9e9bc1e51ea06101e3b6bb37
- SHA512 28ab3826a197bea8e64f807e1a008c16ea572c7468d47b559a65737448362951a5e602e11fca4efa9f7126a152ce1bb0cfa8e3654e8dc3c1d75ba8bf4cc24d48
- SSDEEP 6144:t2gRfMKJ4bKjZbedvYS/VPvDTiLgsORPn0+jiTUO9HwLMGxa9BWBLq7Z0hzbg:MUkm1S/Vv4ORPEhVUdhB4ShzU
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
decryp.exe
Resource
win10v2004-20230831-en
7 signatures
1800 seconds
Behavioral task
behavioral2
Sample
nnll.exe
Resource
win10v2004-20230831-en
18 signatures
1800 seconds
Malware Config
Extracted
Path
-
C:\Users\Admin\Downloads\_Readme.txt
Ransom Note
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URLs
-
https://we.tl/t-O0PCajl3M8
Targets
-
- Target decryp.exe
- Size 18KB
- SHA256 24d8b33ffceaa0cee17a6258d39be1317672fc481c889822cf38963e3eb488c2
- MD5 0bddede8897d9d810f34d4eab1f6f07a
- SHA1 b0b74c8a73699f93915154826ba8cfebe92c1dd4
- SHA512 ae2e6cd9495b54c6fc9c4c27ece37bf0719bf42bd9c5bba4a29782f50d127d6a32461a405d9014b311e9de51d0ffc7c6001f9dbcdbbde94a92a2c51e661fe1fa
- SSDEEP 384:3G1LKciD3h+fRSsBS9UpM8WefjHYc0wu:3G1LK1/sBS978/fTYc0wu
- MD5 SHA1 SHA512 SSDEEP
Score8/10-
Modifies Windows Firewall
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
- Target nnll.exe
- Size 917KB
- SHA256 dd595da7ed62a415d319d4903c62312bf52e10603b54c2051b45c6ca955606a3
- MD5 bd5c08142cf5d80157242c950ef85e62
- SHA1 7b4657f833fd25f579bfc49abc42ac16e9bff697
- SHA512 c48b348cc9e606622a259cf6fa18f975866ab36036b546fe92551a3ae4bd510e2baf64a4cbdf4b7c09fc6f3f7b9fa949847d92766bd9d0261b0517d0b8d9c9db
- SSDEEP 24576:o8m657w6ZBLmkitKqBCjC0PDgM5AH5DT+j:MVV1BCjBEDT
- MD5 SHA1 SHA512 SSDEEP
Score10/10-
Disables Task Manager via registry modification
-
Modifies Windows Firewall
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Loads dropped DLL
-
Adds Run key to start application
-
Legitimate hosting services abused for malware hosting/C2
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1