Analysis
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max time kernel
149s -
max time network
171s -
platform
windows10-2004_x64 -
resource
win10v2004-20220310-en -
submitted
21-03-2022 08:29
Static task
static1
Behavioral task
behavioral1
Sample
Attachments.lnk
Resource
win7-20220311-en
Behavioral task
behavioral2
Sample
Attachments.lnk
Resource
win10v2004-20220310-en
Behavioral task
behavioral3
Sample
DumpStack.dll
Resource
win7-20220310-en
Behavioral task
behavioral4
Sample
DumpStack.dll
Resource
win10v2004-20220310-en
General
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Target
Attachments.lnk
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Size
1KB
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MD5
e87e52db1aa360baf8444c5524dd2b26
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SHA1
b89d0c4568c74f03ec3e1917c22a83c37409b10a
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SHA256
6497223d35530f2e510382aa1866b83ffaf215213b8080b7ecb299b6e7e3e6b1
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SHA512
e93d7808c29ec45569382ee5bd2f50a41c0cf1c1d2cbb909d5aec2abf166f0ad87b672eaa4a1c00b28eb31faf55f1a254d8ab842bcb4d22dd750b26926e7c64a
Malware Config
Signatures
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Bazar Loader
Detected loader normally used to deploy BazarBackdoor malware.
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Bazar/Team9 Loader payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/2104-136-0x0000000180000000-0x000000018003D000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 4 IoCs
Processes:
rundll32.exeflow pid process 79 2104 rundll32.exe 83 2104 rundll32.exe 84 2104 rundll32.exe 85 2104 rundll32.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
cmd.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2403053463-4052593947-3703345493-1000\Control Panel\International\Geo\Nation cmd.exe -
Loads dropped DLL 1 IoCs
Processes:
rundll32.exepid process 2104 rundll32.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of WriteProcessMemory 6 IoCs
Processes:
cmd.execmd.exedescription pid process target process PID 464 wrote to memory of 1708 464 cmd.exe cmd.exe PID 464 wrote to memory of 1708 464 cmd.exe cmd.exe PID 1708 wrote to memory of 1952 1708 cmd.exe xcopy.exe PID 1708 wrote to memory of 1952 1708 cmd.exe xcopy.exe PID 1708 wrote to memory of 2104 1708 cmd.exe rundll32.exe PID 1708 wrote to memory of 2104 1708 cmd.exe rundll32.exe
Processes
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C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\Attachments.lnk1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c xcopy /y DumpStack.log c:\programdata\ && C:\Windows\System32\rundll32.exe C:\programdata\DumpStack.log,spload && exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\xcopy.exexcopy /y DumpStack.log c:\programdata\3⤵
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\programdata\DumpStack.log,spload3⤵
- Blocklisted process makes network request
- Loads dropped DLL
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\ProgramData\DumpStack.logMD5
f948fe3f01333c0326d4dd598e4945c0
SHA170a619d1b2acbf969b44aded654d6a9257465e2b
SHA256f2a957f609ec57b8cbc6035629b249edc288bca6025a1e1a7c83a8ce20f7ebdb
SHA5129406184548f174839dc1634b13018375afd9a34305a0810fbf18f32da44d0e77f887b192ad8c570700d94383df2d2bf3f120adf09073f3378e030bda3892f651
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C:\programdata\DumpStack.logMD5
f948fe3f01333c0326d4dd598e4945c0
SHA170a619d1b2acbf969b44aded654d6a9257465e2b
SHA256f2a957f609ec57b8cbc6035629b249edc288bca6025a1e1a7c83a8ce20f7ebdb
SHA5129406184548f174839dc1634b13018375afd9a34305a0810fbf18f32da44d0e77f887b192ad8c570700d94383df2d2bf3f120adf09073f3378e030bda3892f651
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memory/2104-136-0x0000000180000000-0x000000018003D000-memory.dmpFilesize
244KB