Analysis
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max time kernel
64s -
max time network
145s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
16-09-2022 06:11
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20220812-en
General
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Target
file.exe
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Size
786KB
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MD5
0836c1b98ca4209d6029eeaae7c13d7f
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SHA1
ce8299ef9da4cc14ddb11f63cdd1547658e01cda
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SHA256
f27f49e12620ec64a2516ddc098578f8f644d33ba8048afd31bda49776788ea2
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SHA512
9a447e6ea53cd1d72d96e6c0a19b57cd0dc35253bb12cf22e7243867d0546dda90773a2080e09eb0213d4e9d59af5ae8647626f82fe155422e686fd30bf9af16
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SSDEEP
12288:nyedekZc2B6nKBlSzQ+YzVZglZzOlm8p4tLf5ixIui:nyedekeQYUNYZzODpcfoxIui
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/3608-133-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3608-134-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4808-136-0x0000000002390000-0x00000000024AB000-memory.dmp family_djvu behavioral2/memory/3608-137-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3608-138-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3608-142-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2016-145-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2016-147-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2016-152-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2016-188-0x0000000000400000-0x0000000000537000-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 2640 build2.exe 4596 build3.exe 4168 build2.exe 2268 mstsca.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation file.exe Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation file.exe Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation build2.exe -
Loads dropped DLL 2 IoCs
pid Process 4168 build2.exe 4168 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2296 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-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e2443929-095d-4a03-98ed-921114d46609\\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 10 api.2ip.ua 11 api.2ip.ua 16 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 4808 set thread context of 3608 4808 file.exe 79 PID 3544 set thread context of 2016 3544 file.exe 86 PID 2640 set thread context of 4168 2640 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 value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 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 2844 schtasks.exe 3820 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 1928 timeout.exe -
Kills process with taskkill 1 IoCs
pid Process 1256 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3608 file.exe 3608 file.exe 2016 file.exe 2016 file.exe 4168 build2.exe 4168 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1256 taskkill.exe -
Suspicious use of WriteProcessMemory 56 IoCs
description pid Process procid_target PID 4808 wrote to memory of 3608 4808 file.exe 79 PID 4808 wrote to memory of 3608 4808 file.exe 79 PID 4808 wrote to memory of 3608 4808 file.exe 79 PID 4808 wrote to memory of 3608 4808 file.exe 79 PID 4808 wrote to memory of 3608 4808 file.exe 79 PID 4808 wrote to memory of 3608 4808 file.exe 79 PID 4808 wrote to memory of 3608 4808 file.exe 79 PID 4808 wrote to memory of 3608 4808 file.exe 79 PID 4808 wrote to memory of 3608 4808 file.exe 79 PID 4808 wrote to memory of 3608 4808 file.exe 79 PID 3608 wrote to memory of 2296 3608 file.exe 82 PID 3608 wrote to memory of 2296 3608 file.exe 82 PID 3608 wrote to memory of 2296 3608 file.exe 82 PID 3608 wrote to memory of 3544 3608 file.exe 84 PID 3608 wrote to memory of 3544 3608 file.exe 84 PID 3608 wrote to memory of 3544 3608 file.exe 84 PID 3544 wrote to memory of 2016 3544 file.exe 86 PID 3544 wrote to memory of 2016 3544 file.exe 86 PID 3544 wrote to memory of 2016 3544 file.exe 86 PID 3544 wrote to memory of 2016 3544 file.exe 86 PID 3544 wrote to memory of 2016 3544 file.exe 86 PID 3544 wrote to memory of 2016 3544 file.exe 86 PID 3544 wrote to memory of 2016 3544 file.exe 86 PID 3544 wrote to memory of 2016 3544 file.exe 86 PID 3544 wrote to memory of 2016 3544 file.exe 86 PID 3544 wrote to memory of 2016 3544 file.exe 86 PID 2016 wrote to memory of 2640 2016 file.exe 88 PID 2016 wrote to memory of 2640 2016 file.exe 88 PID 2016 wrote to memory of 2640 2016 file.exe 88 PID 2016 wrote to memory of 4596 2016 file.exe 89 PID 2016 wrote to memory of 4596 2016 file.exe 89 PID 2016 wrote to memory of 4596 2016 file.exe 89 PID 4596 wrote to memory of 2844 4596 build3.exe 90 PID 4596 wrote to memory of 2844 4596 build3.exe 90 PID 4596 wrote to memory of 2844 4596 build3.exe 90 PID 2640 wrote to memory of 4168 2640 build2.exe 94 PID 2640 wrote to memory of 4168 2640 build2.exe 94 PID 2640 wrote to memory of 4168 2640 build2.exe 94 PID 2640 wrote to memory of 4168 2640 build2.exe 94 PID 2640 wrote to memory of 4168 2640 build2.exe 94 PID 2640 wrote to memory of 4168 2640 build2.exe 94 PID 2640 wrote to memory of 4168 2640 build2.exe 94 PID 2640 wrote to memory of 4168 2640 build2.exe 94 PID 2640 wrote to memory of 4168 2640 build2.exe 94 PID 4168 wrote to memory of 2704 4168 build2.exe 95 PID 4168 wrote to memory of 2704 4168 build2.exe 95 PID 4168 wrote to memory of 2704 4168 build2.exe 95 PID 2704 wrote to memory of 1256 2704 cmd.exe 97 PID 2704 wrote to memory of 1256 2704 cmd.exe 97 PID 2704 wrote to memory of 1256 2704 cmd.exe 97 PID 2704 wrote to memory of 1928 2704 cmd.exe 98 PID 2704 wrote to memory of 1928 2704 cmd.exe 98 PID 2704 wrote to memory of 1928 2704 cmd.exe 98 PID 2268 wrote to memory of 3820 2268 mstsca.exe 102 PID 2268 wrote to memory of 3820 2268 mstsca.exe 102 PID 2268 wrote to memory of 3820 2268 mstsca.exe 102
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:4808 -
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:3608 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\e2443929-095d-4a03-98ed-921114d46609" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2296
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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:3544 -
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:2016 -
C:\Users\Admin\AppData\Local\4c82133a-4b90-41d0-b334-aa6ebba9ecbe\build2.exe"C:\Users\Admin\AppData\Local\4c82133a-4b90-41d0-b334-aa6ebba9ecbe\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2640 -
C:\Users\Admin\AppData\Local\4c82133a-4b90-41d0-b334-aa6ebba9ecbe\build2.exe"C:\Users\Admin\AppData\Local\4c82133a-4b90-41d0-b334-aa6ebba9ecbe\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:4168 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" ÐæK/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\4c82133a-4b90-41d0-b334-aa6ebba9ecbe\build2.exe" & del C:\PrograData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:2704 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1256
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:1928
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C:\Users\Admin\AppData\Local\4c82133a-4b90-41d0-b334-aa6ebba9ecbe\build3.exe"C:\Users\Admin\AppData\Local\4c82133a-4b90-41d0-b334-aa6ebba9ecbe\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4596 -
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:2844
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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:2268 -
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:3820
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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
MD5bc08716d798a7704a80df2f61cc56414
SHA19524905f4f19a1976135eee44a95d85a0e15835d
SHA25673882589f6e8497674d3c3893356fe37902d1e849438f62d8903b4f14a202081
SHA51250b8fad042daa55d78cebe76027f4d6a18bac2c24015a8c10ac63b173d07da2443397915c8dd795575a88e6cad8760e2bf4b76ee4296ea7afe21e9106e86cb8c
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD57e8b2d1aee9eef2af84613717be19da2
SHA14cb733b21a3ad591ed16dab7b31205339ab76b47
SHA256e55e5cc51503fe6f15b5f2771cd76b0f578768f8271c46710f19554e42cc6e04
SHA512f370dcd771c1ea54c9ac2085129fae9d61d33b554528f12156a336dfb83f4bcc002af931537678a2bb69e179ef74ce775fa0df143bfd4be07c00564da79cba9e
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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
786KB
MD50836c1b98ca4209d6029eeaae7c13d7f
SHA1ce8299ef9da4cc14ddb11f63cdd1547658e01cda
SHA256f27f49e12620ec64a2516ddc098578f8f644d33ba8048afd31bda49776788ea2
SHA5129a447e6ea53cd1d72d96e6c0a19b57cd0dc35253bb12cf22e7243867d0546dda90773a2080e09eb0213d4e9d59af5ae8647626f82fe155422e686fd30bf9af16
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a