Analysis
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max time kernel
126s -
max time network
137s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
08-07-2022 08:14
Static task
static1
Behavioral task
behavioral1
Sample
dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe.exe
Resource
win10v2004-20220414-en
General
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Target
dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe.exe
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Size
2.5MB
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MD5
b70608c6a2c35914470fba5b0b91cd61
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SHA1
43820909b30fac5c57ee4cf38790e7af75cdb18c
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SHA256
dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe
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SHA512
d5ef559ab8a85b76b3d2e0e32bc28dacea6136a9de405b612c601a9d7769dbe7955831ae96bf9216a8bf13cbad01c96239b8958cc6f7bd0045e9f519e95fdf0a
Malware Config
Extracted
cobaltstrike
http://139.196.112.7:80/l2xG
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user_agent
User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/604.1.38
Signatures
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Cobaltstrike
Detected malicious payload which is part of Cobaltstrike.
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Executes dropped EXE 2 IoCs
Processes:
UpdateInstaller_498081.exeUpdateInstaller_498081.exepid process 2328 UpdateInstaller_498081.exe 2668 UpdateInstaller_498081.exe -
Drops file in System32 directory 1 IoCs
Processes:
dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe.exedescription ioc process File opened for modification \??\c:\windows\system32\UpdateInstaller_498081.exe dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe.exe -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious use of WriteProcessMemory 2 IoCs
Processes:
dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe.exedescription pid process target process PID 4608 wrote to memory of 2152 4608 dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe.exe SCHTASKS.exe PID 4608 wrote to memory of 2152 4608 dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe.exe SCHTASKS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe.exe"C:\Users\Admin\AppData\Local\Temp\dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe.exe"1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\SCHTASKS.exeSCHTASKS /Create /sc minute /mo 1 /tn MicrosoftUpdateW /tr \"C:\windows\system32\UpdateInstaller_498081.exe\" /f2⤵
- Creates scheduled task(s)
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C:\windows\system32\UpdateInstaller_498081.exeC:\windows\system32\UpdateInstaller_498081.exe1⤵
- Executes dropped EXE
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C:\windows\system32\UpdateInstaller_498081.exeC:\windows\system32\UpdateInstaller_498081.exe1⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Windows\System32\UpdateInstaller_498081.exeFilesize
2.5MB
MD5b70608c6a2c35914470fba5b0b91cd61
SHA143820909b30fac5c57ee4cf38790e7af75cdb18c
SHA256dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe
SHA512d5ef559ab8a85b76b3d2e0e32bc28dacea6136a9de405b612c601a9d7769dbe7955831ae96bf9216a8bf13cbad01c96239b8958cc6f7bd0045e9f519e95fdf0a
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C:\Windows\System32\UpdateInstaller_498081.exeFilesize
2.5MB
MD5b70608c6a2c35914470fba5b0b91cd61
SHA143820909b30fac5c57ee4cf38790e7af75cdb18c
SHA256dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe
SHA512d5ef559ab8a85b76b3d2e0e32bc28dacea6136a9de405b612c601a9d7769dbe7955831ae96bf9216a8bf13cbad01c96239b8958cc6f7bd0045e9f519e95fdf0a
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C:\windows\system32\UpdateInstaller_498081.exeFilesize
2.5MB
MD5b70608c6a2c35914470fba5b0b91cd61
SHA143820909b30fac5c57ee4cf38790e7af75cdb18c
SHA256dc59a99152d6a326c32337cfece84ac3ac232d370b5f7051bcf02f274e8358fe
SHA512d5ef559ab8a85b76b3d2e0e32bc28dacea6136a9de405b612c601a9d7769dbe7955831ae96bf9216a8bf13cbad01c96239b8958cc6f7bd0045e9f519e95fdf0a
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memory/2152-130-0x0000000000000000-mapping.dmp