Analysis
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max time kernel
111s -
max time network
135s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
25-04-2022 02:10
Static task
static1
Behavioral task
behavioral1
Sample
buildp.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
buildp.exe
Resource
win10v2004-20220414-en
General
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Target
buildp.exe
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Size
841KB
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MD5
efed57771cb41fdde63781d1e195912c
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SHA1
a71b0545951c99eb6ad4a50c22d02c958003d920
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SHA256
72cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d
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SHA512
6fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080
Malware Config
Extracted
djvu
http://fuyt.org/lancer/get.php
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extension
.gtys
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offline_id
qwVQoIsE2xLety0oNWloOilSDuIBXJGK86LM3ot1
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payload_url
http://zerit.top/dl/build2.exe
http://fuyt.org/files/1/build3.exe
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ransomnote
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Extracted
vidar
51.8
517
https://t.me/mm20220428
https://koyu.space/@ronxik123
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profile_id
517
Signatures
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Detected Djvu ransomware 8 IoCs
resource yara_rule behavioral2/memory/4872-131-0x0000000002280000-0x000000000239B000-memory.dmp family_djvu behavioral2/memory/4440-133-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4440-134-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4440-135-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4440-136-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5084-142-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5084-144-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5084-145-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
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Vidar Stealer 5 IoCs
resource yara_rule behavioral2/memory/1488-154-0x0000000000400000-0x000000000044C000-memory.dmp family_vidar behavioral2/memory/1488-156-0x0000000000400000-0x000000000044C000-memory.dmp family_vidar behavioral2/memory/3580-158-0x00000000020E0000-0x0000000002129000-memory.dmp family_vidar behavioral2/memory/1488-159-0x0000000000400000-0x000000000044C000-memory.dmp family_vidar behavioral2/memory/1488-160-0x0000000000400000-0x000000000044C000-memory.dmp family_vidar -
Downloads MZ/PE file
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Executes dropped EXE 2 IoCs
pid Process 3580 build2.exe 1488 build2.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation buildp.exe Key value queried \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation buildp.exe -
Loads dropped DLL 2 IoCs
pid Process 1488 build2.exe 1488 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 3244 icacls.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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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\17416b26-2de7-45b1-b121-694f4a9393f2\\buildp.exe\" --AutoStart" buildp.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 16 api.2ip.ua 17 api.2ip.ua 27 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 4872 set thread context of 4440 4872 buildp.exe 83 PID 4620 set thread context of 5084 4620 buildp.exe 87 PID 3580 set thread context of 1488 3580 build2.exe 94 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 buildp.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 buildp.exe -
Suspicious behavior: EnumeratesProcesses 12 IoCs
pid Process 4440 buildp.exe 4440 buildp.exe 5084 buildp.exe 5084 buildp.exe 1488 build2.exe 1488 build2.exe 1488 build2.exe 1488 build2.exe 1488 build2.exe 1488 build2.exe 1488 build2.exe 1488 build2.exe -
Suspicious use of WriteProcessMemory 37 IoCs
description pid Process procid_target PID 4872 wrote to memory of 4440 4872 buildp.exe 83 PID 4872 wrote to memory of 4440 4872 buildp.exe 83 PID 4872 wrote to memory of 4440 4872 buildp.exe 83 PID 4872 wrote to memory of 4440 4872 buildp.exe 83 PID 4872 wrote to memory of 4440 4872 buildp.exe 83 PID 4872 wrote to memory of 4440 4872 buildp.exe 83 PID 4872 wrote to memory of 4440 4872 buildp.exe 83 PID 4872 wrote to memory of 4440 4872 buildp.exe 83 PID 4872 wrote to memory of 4440 4872 buildp.exe 83 PID 4872 wrote to memory of 4440 4872 buildp.exe 83 PID 4440 wrote to memory of 3244 4440 buildp.exe 84 PID 4440 wrote to memory of 3244 4440 buildp.exe 84 PID 4440 wrote to memory of 3244 4440 buildp.exe 84 PID 4440 wrote to memory of 4620 4440 buildp.exe 85 PID 4440 wrote to memory of 4620 4440 buildp.exe 85 PID 4440 wrote to memory of 4620 4440 buildp.exe 85 PID 4620 wrote to memory of 5084 4620 buildp.exe 87 PID 4620 wrote to memory of 5084 4620 buildp.exe 87 PID 4620 wrote to memory of 5084 4620 buildp.exe 87 PID 4620 wrote to memory of 5084 4620 buildp.exe 87 PID 4620 wrote to memory of 5084 4620 buildp.exe 87 PID 4620 wrote to memory of 5084 4620 buildp.exe 87 PID 4620 wrote to memory of 5084 4620 buildp.exe 87 PID 4620 wrote to memory of 5084 4620 buildp.exe 87 PID 4620 wrote to memory of 5084 4620 buildp.exe 87 PID 4620 wrote to memory of 5084 4620 buildp.exe 87 PID 5084 wrote to memory of 3580 5084 buildp.exe 92 PID 5084 wrote to memory of 3580 5084 buildp.exe 92 PID 5084 wrote to memory of 3580 5084 buildp.exe 92 PID 3580 wrote to memory of 1488 3580 build2.exe 94 PID 3580 wrote to memory of 1488 3580 build2.exe 94 PID 3580 wrote to memory of 1488 3580 build2.exe 94 PID 3580 wrote to memory of 1488 3580 build2.exe 94 PID 3580 wrote to memory of 1488 3580 build2.exe 94 PID 3580 wrote to memory of 1488 3580 build2.exe 94 PID 3580 wrote to memory of 1488 3580 build2.exe 94 PID 3580 wrote to memory of 1488 3580 build2.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\buildp.exe"C:\Users\Admin\AppData\Local\Temp\buildp.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4872 -
C:\Users\Admin\AppData\Local\Temp\buildp.exe"C:\Users\Admin\AppData\Local\Temp\buildp.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4440 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\17416b26-2de7-45b1-b121-694f4a9393f2" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3244
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C:\Users\Admin\AppData\Local\Temp\buildp.exe"C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4620 -
C:\Users\Admin\AppData\Local\Temp\buildp.exe"C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5084 -
C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe"C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3580 -
C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe"C:\Users\Admin\AppData\Local\eae86473-7594-41c4-af13-c5f97b042f1d\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1488
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
133KB
MD58f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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Filesize
1.2MB
MD5bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize727B
MD5d9c694c2d95c6812aa0be903de46da96
SHA1df1a733a9c6c27997c798ae4c5715cabe1ffa5e4
SHA256f6f85bc0d1770803a206fbfb83c4cb888b3a24b494feac38baa3ea764cda37c0
SHA51297a2eddf197aa74d1d05241008ead092f836b561bc1ad1d731d91db23d6dcce7a65d3dc1609384a3ad3fd5c858bae6c3a4361588b5a965ebf233f14410864793
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize471B
MD5ad8e032271f02af2a955ce10661cc3a8
SHA1967d1bd99bea34c3110cc75c0c0d8b8565eae9f9
SHA256d5081bf75d530e9336a6da0f9142bc10f4d06368c365cf0e33f7c99b0f643ce8
SHA512bc69dfb03284cf1b8d172ff55938f238b928a0c7846306d8232ab697f54c771a9acf8b0e04a85e149da87ea8cfd9395605d0d95afc30eae1793e91399aa7eef7
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize402B
MD5aefbcbdb4c3ead0fedf058228a7dd7d4
SHA112413140a4f741430eb21b805ea3521125ba9bb2
SHA256deb7239a01b556b45d514902f660fee8ec2c3f9b68a6dccd98236b57972518eb
SHA51289713c615c2c832114615af9cc2a8ca05a65cb9d4966a0804fda417c9cce5c6901c00ba3810e6dd7c4b8416e7584325ed1e81c448411e920fd5252c5b91a01a1
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize396B
MD5fc2d41214c26ad1de70010511a003967
SHA18da1e49ba2453326564257516f8f2e2948821ee5
SHA256696f558aec10f588f100478c862e65c33b820c1704239653181f1a89daaa0d63
SHA512c870a169bd8149a38c6baecaf09e495b80f441093a763d0d69c10b1373745e0d93ad85973a8f83deded59780105332a8142c2c59675c303a9bebc6a3e40baa3b
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Filesize
841KB
MD5efed57771cb41fdde63781d1e195912c
SHA1a71b0545951c99eb6ad4a50c22d02c958003d920
SHA25672cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d
SHA5126fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080
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Filesize
368KB
MD5ad1b502b6714c0a374b055332018974b
SHA1672f4e44475177ddcb1bfa73db3c5dee0f031bc2
SHA256f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95
SHA5120197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e
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Filesize
368KB
MD5ad1b502b6714c0a374b055332018974b
SHA1672f4e44475177ddcb1bfa73db3c5dee0f031bc2
SHA256f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95
SHA5120197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e
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Filesize
368KB
MD5ad1b502b6714c0a374b055332018974b
SHA1672f4e44475177ddcb1bfa73db3c5dee0f031bc2
SHA256f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95
SHA5120197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e