Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
01-12-2024 02:39
General
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Target
7b0699fb946ce952624a3d5807839fb1a0613993270aca8227f35001b790b945.exe
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Size
1.8MB
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MD5
4f964ada28fa2dde5c75d3c3682e69c4
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SHA1
481a0ddc3dfd39147abf684b60b6a0b1dfbbc341
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SHA256
7b0699fb946ce952624a3d5807839fb1a0613993270aca8227f35001b790b945
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SHA512
ab07c9602776dc062599a89eed9d38be2c95f563a9ed9c906e6c1066f80e5666f119c5a790a120bf626a73edd3cc178924262d41c0f65eb20fcf3b542a83dc68
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SSDEEP
24576:cWrCg/r+6/5OZr1A+KnhQaPNcHxIpjgqJ6t1:XrC7G5g0gq
Malware Config
Signatures
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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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Dcrat family
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
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Process spawned unexpected child process 3 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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DCRat payload 2 IoCs
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE 1 IoCs
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Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 2 IoCs
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Drops file in System32 directory 2 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 1 IoCs
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Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
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Suspicious behavior: GetForegroundWindowSpam 1 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 12 IoCs
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Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\7b0699fb946ce952624a3d5807839fb1a0613993270aca8227f35001b790b945.exe"C:\Users\Admin\AppData\Local\Temp\7b0699fb946ce952624a3d5807839fb1a0613993270aca8227f35001b790b945.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\x4wdtetp\x4wdtetp.cmdline"2⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESCCC6.tmp" "c:\Windows\System32\CSCEFEC4A028B040B2AA6C285B152E449E.TMP"3⤵
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\QPODD9a6uy.bat"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\chcp.comchcp 650013⤵
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C:\Windows\system32\w32tm.exew32tm /stripchart /computer:localhost /period:5 /dataonly /samples:23⤵
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C:\Users\Admin\AppData\Local\updater.exe"C:\Users\Admin\AppData\Local\updater.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "updateru" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\AppData\Local\updater.exe'" /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "updater" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\updater.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "updateru" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\AppData\Local\updater.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
216B
MD59c0be6fe895662eeb0f68e70bf9fe5e7
SHA154bef9fb30193749ac9103c3055f02c0e8826d26
SHA25687826894fe6a06dddedc9d6b8ca3292e942fc6982dc94fd434e84d987db5de8d
SHA512c4cdea08cc0777630bfbdbbe8577dc0b87d13b2d97a9c0a37ef040d3cb464dc4ac42da53132bd00f091ce1594b8ca70ea8ab4de5c05ca0aacbc6ebaf76e77fb0
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Filesize
1KB
MD51f62d02fb059b70cb34f303f496327c9
SHA181d4569ec99bcb70e8e9ce027b90d12a7fe9e5f8
SHA256b44a827f44f8e264b7750fb909b89427faf54cc01f798e1e1d57a78760541dc0
SHA512e57b2b8e268b4a24c206a0c63827c0f86fd184a1133d36f22a3bac57c6e21368e887b1c628a6463c5f9d27b34260fbf2aa29b0e900eeed029f190effa8b328b6
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Filesize
1.8MB
MD54f964ada28fa2dde5c75d3c3682e69c4
SHA1481a0ddc3dfd39147abf684b60b6a0b1dfbbc341
SHA2567b0699fb946ce952624a3d5807839fb1a0613993270aca8227f35001b790b945
SHA512ab07c9602776dc062599a89eed9d38be2c95f563a9ed9c906e6c1066f80e5666f119c5a790a120bf626a73edd3cc178924262d41c0f65eb20fcf3b542a83dc68
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Filesize
372B
MD5d8d0e16b9cb55988967d21d48ac32231
SHA1d9978b34306c89ca2691e52f8c688735c6f1d9dc
SHA2568848b1b0bd9982ab0c2e30a65e9b450a9df66734a5087520e62d85538c063eb7
SHA51233e212ffd80f5c5d27466a5a918187035d47f4a217ad6c6349eeaadc2f077fa2cc88fbea3631d742b658fbdabacc9aaccbeb57db2550ecbbea36882dd1a3fa08
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Filesize
235B
MD5eddcd0092265b1e0aac23d3c5ae07580
SHA1f1224c19f5650122cf9981cf5225abe34554a521
SHA25681a21a33ad8270afd790f9534dfdec11058a1451416e01ae457dba5ec66bc21f
SHA51231714b4075d46f4a6652970dbc45dde493fbd72ded23d5508177377a4b7fb234260a973ed83d76a4c143c295e4b62b6a10b0a41eb6f8d5b67b150d69d0c0dc1d
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Filesize
1KB
MD5d544bac668d308d2aba58ded2c13d82d
SHA1e5dd50ef24d5c16629092f9290661a92387773b3
SHA25684b05d56c45fd0382410fcd59e16aeef467ed0a455595dda88386dd5c87d7a02
SHA5120826de2bc95d93dde2c540d2d768a0188481ee88f1da79f9c7d70d7ccd3c8715b8f1d62053f84d14f19e4d2b0a13e67084d970a158464e6223e340eb0733e1b0
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Filesize
56KB
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Filesize
10.8MB
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Filesize
96KB
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Filesize
56KB
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Filesize
10.8MB
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Filesize
88KB
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Filesize
72KB
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Filesize
10.8MB
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Filesize
8KB
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Filesize
64KB
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Filesize
360KB
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Filesize
10.8MB
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Filesize
56KB
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Filesize
320KB
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Filesize
312KB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
112KB
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Filesize
112KB
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Filesize
56KB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
1.8MB