MALICIOUS — api-ms-win-crt-string-l1-1-0.dll
MALICIOUS — api-ms-win-crt-string-l1-1-0.dll is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (98/100), attributed to the Container family. 9 of 55 detection engines flagged it, exhibiting 1 ATT&CK technique.
Identification
- SHA-256:
05f7fc4aeec887a4af259e9b841bc5b68751b0c4b7c6cfe392ef0c01df77693c - SHA-1:
cf87dfb0b4c19a6a11bd7ab0bd0ec7f34cf03eb9 - MD5:
dcfa5b38b75453741c21c46688e4a499 - imphash:
38aa7c2ff6ef0e48a9520d6702d08df4 - ssdeep:
6144:TeEriRsAxH/K2jye9POln4RUOeinwl5gaO5W2cRFAx5G3Ti5yguNvZ5VQgx3Sbwd:igixH/dpPOV4uOeinggFQF+5n5ygTIj - TLSH:
T1E24BAFB1011A1135D9FABDB0A01CCEBCD063784570386F9E914BEB6D909CAE3D8FA591 - Submitted as: api-ms-win-crt-string-l1-1-0.dll
- File type: pe · Size: 487974 bytes
- Verdict: malicious (98/100) · Family: Container
Detections (9 of 55 engines)
- MalwareAnalyser heuristics (entropy/packer): UPX
- ClamAV (daily): Win.Trojan.Agent-6943819-1
- YARA: delivr.to detections: DLV_ISO_IMG_Container_Lure
- YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
- Detect It Easy (packer/type): DIE:UPX
- Microsoft Defender: Virus:Win32/Sivis.A
- Emsisoft (Emergency Kit): Win32.Sivis.A
- Trellix Stinger (McAfee): PolyPatch-UPX
- Kaspersky (KVRT): Virus.Win32.Agent.es
MITRE ATT&CK
Why this verdict
The malicious score of 98/100 is the fusion of 10 weighted signals:
- ClamAV (daily) flagged Win.Trojan.Agent-6943819-1 (rule
Win.Trojan.Agent-6943819-1) - engine signal, weight 0.90, confidence 0.95 - Contacted 22 external host(s) at runtime (20 HTTP) - network signal, weight 0.40, confidence 0.80
- Anti-analysis: T1497 - dynamic signal, weight 0.40, confidence 0.75
- YARA: delivr.to detections flagged DLV_ISO_IMG_Container_Lure (rule
DLV_ISO_IMG_Container_Lure) - engine signal, weight 0.35, confidence 0.70 - YARA: JPCERT/CC flagged JPCERT_HUILoader_PlugX_SideLoad (rule
JPCERT_HUILoader_PlugX_SideLoad) - engine signal, weight 0.35, confidence 0.70 - Detect It Easy (packer/type) flagged DIE:UPX (rule
DIE:UPX) - engine signal, weight 0.35, confidence 0.70 - Embedded network infrastructure: http://creativecommons.org/publicdomain/zero/1.0/, https://d.symcb.com/rpa0, http://s.symcb.com/universal-root.crl0 - static signal, weight 0.35, confidence 0.60
- Packing/obfuscation: UPX - static signal, weight 0.25, confidence 0.55
- Dropped 83 executable file(s) at runtime - dynamic signal, weight 0.20, confidence 0.60
- Extracted generic config (1 C2) (generic/advisory) - engine signal, weight 0.15, confidence 0.30
Dynamic analysis (windows)
25462 behavior events · 0 ATT&CK techniques · 97 dropped files.
Runtime network
- www.msftconnecttest.com
- rb.symcd.com
- rb.symcb.com
- inference.location.live.net
- to-do.office.com
- staging.to-do.officeppe.com
- teams.cloud.microsoft
- outlook.office.com
- outlook.office365.com
- outlook.cloud.microsoft
- ctldl.windowsupdate.com
- login.live.com
- ocsp.digicert.com
- desktop-hsgcbep
- v20.events.data.microsoft.com
- config.edge.skype.com
- windows.msn.com
- oneocsp.microsoft.com
- www.msn.com
- officeclient.microsoft.com
Dropped files
- C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\api-ms-win-core-processthreads-l1-1-0.dll -
edf95e32316bb7a4f0becf0b8d901c1d163ed50edaa479faf284d4b8220da32d - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\javaw.exe -
dafb6ef705ce68b42302413903df768d4f1246ed38595ecfbcbc2ffc35f03cae - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\api-ms-win-crt-string-l1-1-0.dll -
fe224a1afe4ae828fd219b3cb200d2955076d5d9bedd1035985de6cd9142d4e2 - C:\$WinREAgent\Rollback.xml -
51b90f6c78639f4591b9cbb6c266667e6f6fbcf6fbac733670a0420edba191b5 - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\api-ms-win-core-processenvironment-l1-1-0.dll -
05f18ecd17c7e706ddc6c9416d851861bc249e8c15728fdf3424408192c19f69 - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\api-ms-win-core-console-l1-1-0.dll -
3c865e692e56b5b4501e897999df4ba74065ebbad12295f866dfb6cb2c303300 - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\mlib_image.dll -
bf26551081826b984e5d0f4eb66b902c662cf4201788e37fc6dcc36a251f467f - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\jsound.dll -
6340a8ba9937bc626a51bc2e75d78d2270fbff8905d03be6bcc15ac8fb3e7fa5 - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\jli.dll -
7bc9e8a972432fac7435de028c4b7cde64751c1b79601ce932fcfcdc2a15c095 - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\api-ms-win-core-timezone-l1-1-0.dll -
f28b5d0d643aedac792c7be3d36274cb2756c520d3bf618daa352d7b0219c0ca - C:\$WinREAgent\Backup\boot.sdi -
e23d7ce5b4b9bf538ccd3f510b7839e96b857bc70eb76d63756a896890cf24b1 - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\java.dll -
1bf35dd015c947a888ba945e97ec31e99b8cf7fe259c7fa1ac39f3ff3b78fea9 - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\management_agent.dll -
7ce6e2d46efbaf737def295e025d6d1019f38aa60fd60ba19ecaf8b4417a50e6 - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\lcms.dll -
9c6396d7ab72cf467cef440b8f133fbad40d91b8949f34d8a13f07d425dc374f - C:\Program Files\Eclipse Adoptium\jdk-21.0.5+11-jre\bin\api-ms-win-core-synch-l1-1-0.dll -
a744eb388f71aaa5b9e0e1b3239b305176511a420b2ec0b1a596189fdc4040bf
Embedded URLs
- http://creativecommons.org/publicdomain/zero/1.0/
- http://www.adobe.com/go/reader_system_reqs_it.UnmoveFilesRimozione
- http://www.adobe.com/go/reader_system_reqs_it
- https://www.digicert.com/CPS0
- http://cacerts.digicert.com/DigiCertEVCodeSigningCA-SHA2.crt0
- http://cacerts.digicert.com/DigiCertHighAssuranceEVRootCA.crt0
- http://crl3.digicert.com/DigiCertHighAssuranceEVRootCA.crl0@
- http://crl4.digicert.com/DigiCertHighAssuranceEVRootCA.crl0
- http://www.digicert.com/ssl-cps-repository.htm0
- https://d.symcb.com/rpa0
- http://s.symcb.com/universal-root.crl0
- https://d.symcb.com/rpa0@
- http://ts-crl.ws.symantec.com/sha256-tss-ca.crl0
- http://ts-aia.ws.symantec.com/sha256-tss-ca.cer0
- http://www.microsoft.com/pki/certs/MicCodSigPCA_2010-07-06.crt0
- http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt0
- http://www.microsoft.com/windows0
- http://www.digicert.com/CPS0
- http://www.eclipse.org/0
- http://www.msftconnecttest.com/connecttest.txt
- http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
- http://rb.symcb.com/rb.crl
- http://203.26.79.13/filestreamingservice//files/753bb2df-a166-494f-aa7d-5678b1ef0c56/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/753bb2df-a166-494f-aa7d-5678b1ef0c56?P1=1787726658&P2=404&P3=2&P4=U%2f%2fUmC2HqW%2fbFG%2faX2OWQJqXdCc%2bDIzqCiExmIZaIZe7dOHtZwf14XDmDgtPxGBQb3yU1QCmvywZei4gCAmRkA%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice//files/c74a5353-3e6a-42b7-94d6-9b96c560c89a/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
Embedded domains
- creativecommons.org
- geocities.com
- www.adobe.com
- helpx.adobe.com
- www.microsoft.com
- crl3.digicert.com
- crl4.digicert.com
- www.digicert.com
- cacerts.digicert.com
- d.symcb.com
- s.symcb.com
- ts-crl.ws.symantec.com
- ts-aia.ws.symantec.com
- crl.microsoft.com
- www.eclipse.org
Embedded IP addresses
- 74.179.71.159
- 4.150.223.114
- 20.247.184.142
- 4.230.171.124
- 4.247.188.224
- 20.184.175.21
- 74.178.240.61
- 74.178.240.51
- 52.123.129.14
- 20.236.44.162
- 52.123.128.14
- 51.104.15.252
- 52.123.252.215
- 203.26.79.13
- 135.233.45.221
- 135.233.95.80
- 85.210.193.152
- 52.148.114.188
- 135.233.45.223
- 72.153.5.128
- 52.110.12.4
- 52.110.12.55
More Container samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report