Analysis
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max time kernel
93s -
max time network
132s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
16-09-2022 00:04
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20220901-en
General
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Target
file.exe
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Size
798KB
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MD5
902f8d105d682ad89f6af82740324ca1
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SHA1
dff4864742f0560a7fc74ae4a7ff08fe6eeee93b
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SHA256
d9a8d0ca62b90f5fc8412a61c097ed746422465e9401c2ed314e0a7fabd5b3d8
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SHA512
e24bc5701325bb33a561e87242ab48231ff5610764c9c6e3fe8bbd2ea281753145243f2a12edf7946fe9cda6e9fa47cef23081abf9ff4e774657d041711ab73e
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SSDEEP
12288:Au9hGBcyhJ/adcX4kCx55OBesUxvQKZnnd89xE2rx/uxJImqBmEwSvoBVT75uinb:ANvhocw5sBesUNXK9WRREwIoXQiAnM
Malware Config
Extracted
djvu
http://acacaca.org/test3/get.php
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extension
.eemv
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offline_id
5IVlpkccZlJz0AZ5atgGWVKe9CGAnXjohDf40mt1
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payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 10 IoCs
resource yara_rule behavioral2/memory/3632-133-0x0000000002380000-0x000000000249B000-memory.dmp family_djvu behavioral2/memory/2136-136-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2136-135-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2136-137-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2136-138-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2136-142-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4824-145-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4824-147-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4824-148-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4824-160-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Executes dropped EXE 4 IoCs
pid Process 4396 build2.exe 2040 build3.exe 1444 mstsca.exe 3872 build2.exe -
Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation file.exe Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation file.exe Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation build2.exe -
Loads dropped DLL 2 IoCs
pid Process 3872 build2.exe 3872 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4536 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-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\db9ba4a2-efe3-4909-9035-20a81b5138c0\\file.exe\" --AutoStart" file.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 21 api.2ip.ua 26 api.2ip.ua 20 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 3632 set thread context of 2136 3632 file.exe 86 PID 4296 set thread context of 4824 4296 file.exe 90 PID 4396 set thread context of 3872 4396 build2.exe 113 -
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 -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 544 schtasks.exe 1940 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 3912 timeout.exe -
Kills process with taskkill 1 IoCs
pid Process 3612 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2136 file.exe 2136 file.exe 4824 file.exe 4824 file.exe 3872 build2.exe 3872 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3612 taskkill.exe -
Suspicious use of WriteProcessMemory 56 IoCs
description pid Process procid_target PID 3632 wrote to memory of 2136 3632 file.exe 86 PID 3632 wrote to memory of 2136 3632 file.exe 86 PID 3632 wrote to memory of 2136 3632 file.exe 86 PID 3632 wrote to memory of 2136 3632 file.exe 86 PID 3632 wrote to memory of 2136 3632 file.exe 86 PID 3632 wrote to memory of 2136 3632 file.exe 86 PID 3632 wrote to memory of 2136 3632 file.exe 86 PID 3632 wrote to memory of 2136 3632 file.exe 86 PID 3632 wrote to memory of 2136 3632 file.exe 86 PID 3632 wrote to memory of 2136 3632 file.exe 86 PID 2136 wrote to memory of 4536 2136 file.exe 87 PID 2136 wrote to memory of 4536 2136 file.exe 87 PID 2136 wrote to memory of 4536 2136 file.exe 87 PID 2136 wrote to memory of 4296 2136 file.exe 88 PID 2136 wrote to memory of 4296 2136 file.exe 88 PID 2136 wrote to memory of 4296 2136 file.exe 88 PID 4296 wrote to memory of 4824 4296 file.exe 90 PID 4296 wrote to memory of 4824 4296 file.exe 90 PID 4296 wrote to memory of 4824 4296 file.exe 90 PID 4296 wrote to memory of 4824 4296 file.exe 90 PID 4296 wrote to memory of 4824 4296 file.exe 90 PID 4296 wrote to memory of 4824 4296 file.exe 90 PID 4296 wrote to memory of 4824 4296 file.exe 90 PID 4296 wrote to memory of 4824 4296 file.exe 90 PID 4296 wrote to memory of 4824 4296 file.exe 90 PID 4296 wrote to memory of 4824 4296 file.exe 90 PID 4824 wrote to memory of 4396 4824 file.exe 94 PID 4824 wrote to memory of 4396 4824 file.exe 94 PID 4824 wrote to memory of 4396 4824 file.exe 94 PID 4824 wrote to memory of 2040 4824 file.exe 95 PID 4824 wrote to memory of 2040 4824 file.exe 95 PID 4824 wrote to memory of 2040 4824 file.exe 95 PID 2040 wrote to memory of 544 2040 build3.exe 96 PID 2040 wrote to memory of 544 2040 build3.exe 96 PID 2040 wrote to memory of 544 2040 build3.exe 96 PID 1444 wrote to memory of 1940 1444 mstsca.exe 107 PID 1444 wrote to memory of 1940 1444 mstsca.exe 107 PID 1444 wrote to memory of 1940 1444 mstsca.exe 107 PID 4396 wrote to memory of 3872 4396 build2.exe 113 PID 4396 wrote to memory of 3872 4396 build2.exe 113 PID 4396 wrote to memory of 3872 4396 build2.exe 113 PID 4396 wrote to memory of 3872 4396 build2.exe 113 PID 4396 wrote to memory of 3872 4396 build2.exe 113 PID 4396 wrote to memory of 3872 4396 build2.exe 113 PID 4396 wrote to memory of 3872 4396 build2.exe 113 PID 4396 wrote to memory of 3872 4396 build2.exe 113 PID 4396 wrote to memory of 3872 4396 build2.exe 113 PID 3872 wrote to memory of 1776 3872 build2.exe 114 PID 3872 wrote to memory of 1776 3872 build2.exe 114 PID 3872 wrote to memory of 1776 3872 build2.exe 114 PID 1776 wrote to memory of 3612 1776 cmd.exe 116 PID 1776 wrote to memory of 3612 1776 cmd.exe 116 PID 1776 wrote to memory of 3612 1776 cmd.exe 116 PID 1776 wrote to memory of 3912 1776 cmd.exe 117 PID 1776 wrote to memory of 3912 1776 cmd.exe 117 PID 1776 wrote to memory of 3912 1776 cmd.exe 117
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3632 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2136 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\db9ba4a2-efe3-4909-9035-20a81b5138c0" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4536
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4296 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4824 -
C:\Users\Admin\AppData\Local\4d86a96f-0fa4-4e61-a8c4-e345ab17098e\build2.exe"C:\Users\Admin\AppData\Local\4d86a96f-0fa4-4e61-a8c4-e345ab17098e\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4396 -
C:\Users\Admin\AppData\Local\4d86a96f-0fa4-4e61-a8c4-e345ab17098e\build2.exe"C:\Users\Admin\AppData\Local\4d86a96f-0fa4-4e61-a8c4-e345ab17098e\build2.exe"6⤵
- Executes dropped EXE
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3872 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" 195.201.253.5/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\4d86a96f-0fa4-4e61-a8c4-e345ab17098e\build2.exe" & del C:\PrograData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:1776 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3612
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:3912
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C:\Users\Admin\AppData\Local\4d86a96f-0fa4-4e61-a8c4-e345ab17098e\build3.exe"C:\Users\Admin\AppData\Local\4d86a96f-0fa4-4e61-a8c4-e345ab17098e\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2040 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"6⤵
- Creates scheduled task(s)
PID:544
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1444 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"2⤵
- Creates scheduled task(s)
PID:1940
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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Filesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD5ea3ead1b160922fb25b1b9d766a56fa5
SHA19f61cb0a5a80fa5ba776f71fed4728d002d3aca1
SHA2564080213fba647d43c0ac02710ac7b631c23f8f791930016045cda9aeec1b6867
SHA512ec817bdc668bff4c266ca8b6a6c4068251926714262a95f9ac7f7565e2d66a26371589182d0ba1d03fa482d99430b865cb7eb24becf92b72e45f20b26a215c15
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD5e9e482bf825221326b7c080ef52e5036
SHA167244c170dad567630298f89364a5e9626e2517a
SHA25660843d5086f10e833ca98696967f1a39ea04a2ffee6d87679b5803092b9cfa71
SHA512c7a5fd63c0faa2a5cd8be90c7dcf10d8dd564964dc4b8ab4fa1a7a188fa89094563f595c94f4ea133582cfbcf9cc90cb74bd273924b7fa5eadae868bced51440
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD579d5a47ba1b55296f0f464e00a7dfd77
SHA10fb71f6ede365032730a566fa2010b0332b97a96
SHA256ffd26263df46d4996190e638f78f3b896e9d149c229ca4c51b85c17e2e4db382
SHA5127ef9a6330a0f631402bd251d1403b198b65c0829371c15cf1087d13ddac1af1943be117e6b449cc476311f4e1400af4878495c7c64ab3a79c0de013a882dac6a
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD544892e4b662ea5fbca3f1b5c32ec5b1f
SHA19e21ef896e4f1d4aa7514df3ca57ed077540a6d7
SHA256ce6879c4b59ed0f583fdd6abfe2c4fcf81666f1de2686590e8fd8c796a669566
SHA5128c1b77b6d0c31d40143caa55db61d04c1b8ff2e0af41e7a075427afc385d78314e7a9677197db155f2adf27376da678654f04d54b8bd3070a1e5503646ccfee5
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Filesize
376KB
MD58b01bb02b7aeb097ba96dc7628575ca0
SHA111046fb024f695b1dc7a3a0be9167cb4e85548c6
SHA2567abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a
SHA51264cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35
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Filesize
376KB
MD58b01bb02b7aeb097ba96dc7628575ca0
SHA111046fb024f695b1dc7a3a0be9167cb4e85548c6
SHA2567abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a
SHA51264cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35
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Filesize
376KB
MD58b01bb02b7aeb097ba96dc7628575ca0
SHA111046fb024f695b1dc7a3a0be9167cb4e85548c6
SHA2567abb4b2423a93fa4b7a2cd19bcc854cc96d2e9ed20c13b86c39f49fe7cb80e4a
SHA51264cd772d4e319255e32909577ac137966cd47bd295aa3a61a76e52d651d80d313a3cfee7ea88d703bb293931a91558161184de2b76f8e5d9a2358a065c5c5f35
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
798KB
MD5902f8d105d682ad89f6af82740324ca1
SHA1dff4864742f0560a7fc74ae4a7ff08fe6eeee93b
SHA256d9a8d0ca62b90f5fc8412a61c097ed746422465e9401c2ed314e0a7fabd5b3d8
SHA512e24bc5701325bb33a561e87242ab48231ff5610764c9c6e3fe8bbd2ea281753145243f2a12edf7946fe9cda6e9fa47cef23081abf9ff4e774657d041711ab73e
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a