General
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Target
4254980fa3fa11487087f6ff8cd480ab8f22c7d85a8ac5759119f28c9e9bc124
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Size
238KB
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Sample
231208-t23kpabahk
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MD5
76c1e36d3b39338ea1757dfab1ea3cc8
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SHA1
08884dbfe52986b407af311a349e3e45345242e9
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SHA256
4254980fa3fa11487087f6ff8cd480ab8f22c7d85a8ac5759119f28c9e9bc124
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SHA512
f4b7a858f9685cd23a9e4c509f88a0cb7f262609c8fc50930455827d8b2576dd40492e2cfaf247cf5f7b1b3342aa023544b022431c09911f3d1a5bc0b1a30832
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SSDEEP
3072:uf0S/UGn9oZ1/yMjl+ACawid5D/dR9m3oGiWHqTCK:NsU7Z16MgcHdFJm3BHqT
Static task
static1
Behavioral task
behavioral1
Sample
4254980fa3fa11487087f6ff8cd480ab8f22c7d85a8ac5759119f28c9e9bc124.exe
Resource
win10v2004-20231130-en
Malware Config
Extracted
smokeloader
pu10
Extracted
smokeloader
2020
http://host-file-host6.com/
http://host-host-file8.com/
Extracted
djvu
http://zexeq.com/test1/get.php
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extension
.nbzi
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offline_id
csCsb6cUvy0iMa6NgGCGH0hSfXQlGjZVEmFVkgt1
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payload_url
http://brusuax.com/dl/build2.exe
http://zexeq.com/files/1/build3.exe
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ransomnote
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Targets
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Target
4254980fa3fa11487087f6ff8cd480ab8f22c7d85a8ac5759119f28c9e9bc124
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Size
238KB
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MD5
76c1e36d3b39338ea1757dfab1ea3cc8
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SHA1
08884dbfe52986b407af311a349e3e45345242e9
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SHA256
4254980fa3fa11487087f6ff8cd480ab8f22c7d85a8ac5759119f28c9e9bc124
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SHA512
f4b7a858f9685cd23a9e4c509f88a0cb7f262609c8fc50930455827d8b2576dd40492e2cfaf247cf5f7b1b3342aa023544b022431c09911f3d1a5bc0b1a30832
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SSDEEP
3072:uf0S/UGn9oZ1/yMjl+ACawid5D/dR9m3oGiWHqTCK:NsU7Z16MgcHdFJm3BHqT
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Detect ZGRat V1
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Detected Djvu ransomware
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Identifies VirtualBox via ACPI registry values (likely anti-VM)
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Downloads MZ/PE file
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Deletes itself
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Executes dropped EXE
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Modifies file permissions
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Adds Run key to start application
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Suspicious use of NtSetInformationThreadHideFromDebugger
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Suspicious use of SetThreadContext
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Defense Evasion
File and Directory Permissions Modification
1Modify Registry
1Virtualization/Sandbox Evasion
1