Analysis
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max time kernel
72s -
max time network
149s -
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, 01:25
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20220812-en
General
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Target
file.exe
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Size
798KB
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MD5
7bda6dd8e9850ea3613461d45bfd6657
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SHA1
d4b94890b3f6a0dddaed143aa5c257637cce1be2
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SHA256
dbabe4d1fef808fabffbaa47b139242c2630e42acfceba77dd9172836f73204c
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SHA512
a687a3d988a7f8c8da35655167c86111a53ba9ad4637180344157017f68dd42c1ac647dd72b3a4846154c350dc1576f3c7beba6cb7c5258e5471ddbc574faf5e
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SSDEEP
24576:Xx4+icv70Z5TkOGXDvWWwbb1E4QzVrCQyLitT:YNZ+zOXE/zyAT
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/3516-136-0x0000000002490000-0x00000000025AB000-memory.dmp family_djvu behavioral2/memory/4120-138-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4120-139-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4120-140-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4120-141-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4120-145-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5036-148-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5036-150-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5036-155-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5036-191-0x0000000000400000-0x0000000000537000-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 2088 build2.exe 220 build3.exe 1816 build2.exe 1944 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 1816 build2.exe 1816 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4616 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\\dae8e644-a2ae-4bad-bc96-22d3d47bb06d\\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 5 api.2ip.ua 6 api.2ip.ua 15 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 3516 set thread context of 4120 3516 file.exe 81 PID 3708 set thread context of 5036 3708 file.exe 85 PID 2088 set thread context of 1816 2088 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 -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1796 schtasks.exe 1884 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 3084 timeout.exe -
Kills process with taskkill 1 IoCs
pid Process 2448 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4120 file.exe 4120 file.exe 5036 file.exe 5036 file.exe 1816 build2.exe 1816 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2448 taskkill.exe -
Suspicious use of WriteProcessMemory 56 IoCs
description pid Process procid_target PID 3516 wrote to memory of 4120 3516 file.exe 81 PID 3516 wrote to memory of 4120 3516 file.exe 81 PID 3516 wrote to memory of 4120 3516 file.exe 81 PID 3516 wrote to memory of 4120 3516 file.exe 81 PID 3516 wrote to memory of 4120 3516 file.exe 81 PID 3516 wrote to memory of 4120 3516 file.exe 81 PID 3516 wrote to memory of 4120 3516 file.exe 81 PID 3516 wrote to memory of 4120 3516 file.exe 81 PID 3516 wrote to memory of 4120 3516 file.exe 81 PID 3516 wrote to memory of 4120 3516 file.exe 81 PID 4120 wrote to memory of 4616 4120 file.exe 82 PID 4120 wrote to memory of 4616 4120 file.exe 82 PID 4120 wrote to memory of 4616 4120 file.exe 82 PID 4120 wrote to memory of 3708 4120 file.exe 83 PID 4120 wrote to memory of 3708 4120 file.exe 83 PID 4120 wrote to memory of 3708 4120 file.exe 83 PID 3708 wrote to memory of 5036 3708 file.exe 85 PID 3708 wrote to memory of 5036 3708 file.exe 85 PID 3708 wrote to memory of 5036 3708 file.exe 85 PID 3708 wrote to memory of 5036 3708 file.exe 85 PID 3708 wrote to memory of 5036 3708 file.exe 85 PID 3708 wrote to memory of 5036 3708 file.exe 85 PID 3708 wrote to memory of 5036 3708 file.exe 85 PID 3708 wrote to memory of 5036 3708 file.exe 85 PID 3708 wrote to memory of 5036 3708 file.exe 85 PID 3708 wrote to memory of 5036 3708 file.exe 85 PID 5036 wrote to memory of 2088 5036 file.exe 89 PID 5036 wrote to memory of 2088 5036 file.exe 89 PID 5036 wrote to memory of 2088 5036 file.exe 89 PID 5036 wrote to memory of 220 5036 file.exe 91 PID 5036 wrote to memory of 220 5036 file.exe 91 PID 5036 wrote to memory of 220 5036 file.exe 91 PID 220 wrote to memory of 1796 220 build3.exe 92 PID 220 wrote to memory of 1796 220 build3.exe 92 PID 220 wrote to memory of 1796 220 build3.exe 92 PID 2088 wrote to memory of 1816 2088 build2.exe 94 PID 2088 wrote to memory of 1816 2088 build2.exe 94 PID 2088 wrote to memory of 1816 2088 build2.exe 94 PID 2088 wrote to memory of 1816 2088 build2.exe 94 PID 2088 wrote to memory of 1816 2088 build2.exe 94 PID 2088 wrote to memory of 1816 2088 build2.exe 94 PID 2088 wrote to memory of 1816 2088 build2.exe 94 PID 2088 wrote to memory of 1816 2088 build2.exe 94 PID 2088 wrote to memory of 1816 2088 build2.exe 94 PID 1944 wrote to memory of 1884 1944 mstsca.exe 98 PID 1944 wrote to memory of 1884 1944 mstsca.exe 98 PID 1944 wrote to memory of 1884 1944 mstsca.exe 98 PID 1816 wrote to memory of 1160 1816 build2.exe 100 PID 1816 wrote to memory of 1160 1816 build2.exe 100 PID 1816 wrote to memory of 1160 1816 build2.exe 100 PID 1160 wrote to memory of 2448 1160 cmd.exe 102 PID 1160 wrote to memory of 2448 1160 cmd.exe 102 PID 1160 wrote to memory of 2448 1160 cmd.exe 102 PID 1160 wrote to memory of 3084 1160 cmd.exe 103 PID 1160 wrote to memory of 3084 1160 cmd.exe 103 PID 1160 wrote to memory of 3084 1160 cmd.exe 103
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:3516 -
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:4120 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\dae8e644-a2ae-4bad-bc96-22d3d47bb06d" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4616
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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:3708 -
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:5036 -
C:\Users\Admin\AppData\Local\f704b243-588a-4ebd-baa1-cbb1fde24625\build2.exe"C:\Users\Admin\AppData\Local\f704b243-588a-4ebd-baa1-cbb1fde24625\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2088 -
C:\Users\Admin\AppData\Local\f704b243-588a-4ebd-baa1-cbb1fde24625\build2.exe"C:\Users\Admin\AppData\Local\f704b243-588a-4ebd-baa1-cbb1fde24625\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:1816 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" ðßX/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\f704b243-588a-4ebd-baa1-cbb1fde24625\build2.exe" & del C:\PrograData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:1160 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2448
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:3084
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C:\Users\Admin\AppData\Local\f704b243-588a-4ebd-baa1-cbb1fde24625\build3.exe"C:\Users\Admin\AppData\Local\f704b243-588a-4ebd-baa1-cbb1fde24625\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:220 -
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:1796
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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:1944 -
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:1884
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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
MD500a2ffeb65f1b20343be0ef470cae2a9
SHA159fa8ee2a503b404b6d4d884aded6c340c94f81e
SHA2564e336aded51a1060c07ee1b13036c855e3e11b8e07d681fb176ae032ef2d02ff
SHA512b144532f3cdefb6861fa4f3eb5627e0da43f768ca0d92c4df75f1bb81b2b791ddbc8e8b6c6364af334d788f9197c7120a9c04f0173fd29c030c48ab2f40d0bab
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD5ba49abc472d29b53cf1596e05861e533
SHA16b33257624d0597abd49c988b2b0585924d18244
SHA2561ff371391cafbb374221100612b637b92e4380b92b25938a3d71b84fc763abfb
SHA512f365f7aab067aacd6ce997cad3360a9163a237da513a80b7f9d3f8f998dc6695aa0d24b2af9b963d8d309fe1a37fff8a6a1f67dc87fa78bf56c07ea66b70eab2
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Filesize
798KB
MD57bda6dd8e9850ea3613461d45bfd6657
SHA1d4b94890b3f6a0dddaed143aa5c257637cce1be2
SHA256dbabe4d1fef808fabffbaa47b139242c2630e42acfceba77dd9172836f73204c
SHA512a687a3d988a7f8c8da35655167c86111a53ba9ad4637180344157017f68dd42c1ac647dd72b3a4846154c350dc1576f3c7beba6cb7c5258e5471ddbc574faf5e
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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
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a