Analysis
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max time kernel
16s -
max time network
18s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
06-03-2021 18:21
Static task
static1
Behavioral task
behavioral1
Sample
lagstress.exe
Resource
win7v20201028
General
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Target
lagstress.exe
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Size
1.3MB
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MD5
ded9a9e5aa1f2e772f5d81a984743af6
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SHA1
a96333fc84cdd824fb7b4176ee3441c4d9d4f3c6
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SHA256
045ce5f3e750d27127ac6dd5683533b1e42748c7cb47a38a06a42f7f1dfb15d7
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SHA512
fc8f9dd8a9abf79d81cb792aa8397b58de5f7fae671b7bd742f68d449096b955172419a96d95876c20ab5cb04faadf4bc96852157cc253b292f6e0adf17dde77
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
Decoder.exepid process 1160 Decoder.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 5 api.ipify.org 6 api.ipify.org -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 692 timeout.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
lagstress.exepid process 1632 lagstress.exe 1632 lagstress.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
lagstress.exedescription pid process Token: SeDebugPrivilege 1632 lagstress.exe -
Suspicious use of WriteProcessMemory 10 IoCs
Processes:
lagstress.execmd.exedescription pid process target process PID 1632 wrote to memory of 1160 1632 lagstress.exe Decoder.exe PID 1632 wrote to memory of 1160 1632 lagstress.exe Decoder.exe PID 1632 wrote to memory of 1160 1632 lagstress.exe Decoder.exe PID 1632 wrote to memory of 1160 1632 lagstress.exe Decoder.exe PID 1632 wrote to memory of 916 1632 lagstress.exe cmd.exe PID 1632 wrote to memory of 916 1632 lagstress.exe cmd.exe PID 1632 wrote to memory of 916 1632 lagstress.exe cmd.exe PID 916 wrote to memory of 692 916 cmd.exe timeout.exe PID 916 wrote to memory of 692 916 cmd.exe timeout.exe PID 916 wrote to memory of 692 916 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\lagstress.exe"C:\Users\Admin\AppData\Local\Temp\lagstress.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\ProgramData\Decoder.exe"C:\ProgramData\Decoder.exe"2⤵
- Executes dropped EXE
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C:\Windows\system32\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\.cmd""2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\timeout.exetimeout 43⤵
- Delays execution with timeout.exe
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\ProgramData\Decoder.exeMD5
6bd60496fa24ada50ca869be53467c7c
SHA15afdeb2dade4a35e6d8feef1ef24e30075302d6c
SHA25625dfe0485d9e8fc9380bd7fc63cfca88c3b9b8fc23c75349a68ecfea056ba04b
SHA512bacd106d5f211a1c24ead24ef32266a68550c3be8dde75e7ef509e165590c058b590edb20c060f5a8ecaa3b785b0e9e2edd3e458146f042c1f12821f66735806
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C:\ProgramData\Decoder.exeMD5
6bd60496fa24ada50ca869be53467c7c
SHA15afdeb2dade4a35e6d8feef1ef24e30075302d6c
SHA25625dfe0485d9e8fc9380bd7fc63cfca88c3b9b8fc23c75349a68ecfea056ba04b
SHA512bacd106d5f211a1c24ead24ef32266a68550c3be8dde75e7ef509e165590c058b590edb20c060f5a8ecaa3b785b0e9e2edd3e458146f042c1f12821f66735806
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C:\Users\Admin\AppData\Local\Temp\.cmdMD5
73712247036b6a24d16502c57a3e5679
SHA165ca9edadb0773fc34db7dfefe9e6416f1ac17fa
SHA2568bd49d7e7e6b2c2dc16a4cb0eebb8f28892775fad56c9e4aaa22d59f01883cd0
SHA512548eef10b0118f7d907fa19c12de68b47278afffb3eb9460621efb2b711ebcf6b90d0ea1c077fc480e032bf241fb3f8cc995ec1373e301446f89f1a74a6309de
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memory/692-12-0x0000000000000000-mapping.dmp
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memory/916-9-0x0000000000000000-mapping.dmp
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memory/1160-7-0x0000000000000000-mapping.dmp
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memory/1160-13-0x00000000745C0000-0x0000000074CAE000-memory.dmpFilesize
6.9MB
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memory/1160-14-0x0000000000DE0000-0x0000000000DE1000-memory.dmpFilesize
4KB
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memory/1160-16-0x0000000076341000-0x0000000076343000-memory.dmpFilesize
8KB
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memory/1632-2-0x000007FEF60D0000-0x000007FEF6ABC000-memory.dmpFilesize
9.9MB
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memory/1632-6-0x000000001B1D0000-0x000000001B1D2000-memory.dmpFilesize
8KB
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memory/1632-5-0x0000000000610000-0x0000000000681000-memory.dmpFilesize
452KB
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memory/1632-3-0x0000000000B50000-0x0000000000B51000-memory.dmpFilesize
4KB