Analysis
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max time kernel
152s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
resource tags
arch:x64arch:x86image:win10v2004-20220414-enlocale:en-usos:windows10-2004-x64system -
submitted
20-07-2022 01:25
Static task
static1
Behavioral task
behavioral1
Sample
dfa9f37c769db7c48c6442fedbc0fdbe.dll
Resource
win7-20220715-en
Behavioral task
behavioral2
Sample
dfa9f37c769db7c48c6442fedbc0fdbe.dll
Resource
win10v2004-20220414-en
General
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Target
dfa9f37c769db7c48c6442fedbc0fdbe.dll
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Size
5.0MB
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MD5
dfa9f37c769db7c48c6442fedbc0fdbe
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SHA1
b95b419a55747a6b64c68f6a1e329d7cba0bb8cc
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SHA256
70464f96d9da53e3030e62a82bf60910b0cc042a1d679f97524d0a1296ef256b
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SHA512
b2ddcc3ffe8ee22ca945a3a369a2c1fda1949f236cd93be5f6af9621a88eceba88e22e3e6d6f8e1bbacc9c0c0dc0f5feaa6951a622b49d11d093c56e0ef5bb8a
Malware Config
Signatures
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Wannacry
WannaCry is a ransomware cryptoworm.
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Contacts a large (3315) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
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Executes dropped EXE 3 IoCs
Processes:
mssecsvc.exemssecsvc.exetasksche.exepid process 4476 mssecsvc.exe 832 mssecsvc.exe 4140 tasksche.exe -
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
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Drops file in Windows directory 2 IoCs
Processes:
rundll32.exemssecsvc.exedescription ioc process File created C:\WINDOWS\mssecsvc.exe rundll32.exe File created C:\WINDOWS\tasksche.exe mssecsvc.exe -
Modifies data under HKEY_USERS 5 IoCs
Processes:
mssecsvc.exedescription ioc process Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ mssecsvc.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" mssecsvc.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" mssecsvc.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" mssecsvc.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" mssecsvc.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 4668 wrote to memory of 312 4668 rundll32.exe rundll32.exe PID 4668 wrote to memory of 312 4668 rundll32.exe rundll32.exe PID 4668 wrote to memory of 312 4668 rundll32.exe rundll32.exe PID 312 wrote to memory of 4476 312 rundll32.exe mssecsvc.exe PID 312 wrote to memory of 4476 312 rundll32.exe mssecsvc.exe PID 312 wrote to memory of 4476 312 rundll32.exe mssecsvc.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\dfa9f37c769db7c48c6442fedbc0fdbe.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:4668 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\dfa9f37c769db7c48c6442fedbc0fdbe.dll,#12⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:312 -
C:\WINDOWS\mssecsvc.exeC:\WINDOWS\mssecsvc.exe3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4476 -
C:\WINDOWS\tasksche.exeC:\WINDOWS\tasksche.exe /i4⤵
- Executes dropped EXE
PID:4140
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C:\WINDOWS\mssecsvc.exeC:\WINDOWS\mssecsvc.exe -m security1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:832
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\WINDOWS\mssecsvc.exeFilesize
3.6MB
MD520d878ad8b3b006771ad4f61d332c91b
SHA188454b66584a5f89bec30dc923e7408737400654
SHA2561d82b20304266667f079b737ddff9a0ed8aac261935cacb8ff76972d600d768f
SHA512f8c9ce15cc6c376f7364c1e89e32775f8ea4e5b3b12e4caa28f9d33b1cbe7092a857dc06b085207b469bf184eb3f5415ed42866237ecc4ed54286698142f65b1
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C:\Windows\mssecsvc.exeFilesize
3.6MB
MD520d878ad8b3b006771ad4f61d332c91b
SHA188454b66584a5f89bec30dc923e7408737400654
SHA2561d82b20304266667f079b737ddff9a0ed8aac261935cacb8ff76972d600d768f
SHA512f8c9ce15cc6c376f7364c1e89e32775f8ea4e5b3b12e4caa28f9d33b1cbe7092a857dc06b085207b469bf184eb3f5415ed42866237ecc4ed54286698142f65b1
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C:\Windows\mssecsvc.exeFilesize
3.6MB
MD520d878ad8b3b006771ad4f61d332c91b
SHA188454b66584a5f89bec30dc923e7408737400654
SHA2561d82b20304266667f079b737ddff9a0ed8aac261935cacb8ff76972d600d768f
SHA512f8c9ce15cc6c376f7364c1e89e32775f8ea4e5b3b12e4caa28f9d33b1cbe7092a857dc06b085207b469bf184eb3f5415ed42866237ecc4ed54286698142f65b1
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C:\Windows\tasksche.exeFilesize
3.4MB
MD590159ec7837348153f7a314fcf7b563e
SHA1275be3027d7984b21d595ae7b335f57654078b60
SHA256386a6cccdf652065f35f93cc0b401d008cf8af42264dc62852e7dc5c50dbec5d
SHA512c2fae6702f810c1e23868ee24fb9817930c4cdef8364a3164264ec089124fab4a3cab3fc3862a3bc45ed629677df0deb6652a1bc157d81ffb6179bfc03b5fd97
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memory/312-131-0x0000000000000000-mapping.dmp
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memory/4476-132-0x0000000000000000-mapping.dmp