Analysis
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max time kernel
97s -
max time network
125s -
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 18:48
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
821KB
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MD5
eab9ded288ae44356d1063e5898748d3
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SHA1
4345b26ac78f3eb0ef37e387e91e6ab55a0ef9c2
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SHA256
528f4b8565a6941bcd72f1f90af1034fe4b93e401609bde90437fba1a3227e2b
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SHA512
3156c48b49eb9fd8211725fac62cb6a45d0dbc7085dab540348844c52c0d686351a1742d6642b51abdb28f2dd0591dee82a43215a9df0438a4319d791b489c53
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SSDEEP
12288:Ja/k3ctBqrBJ80KndOTI6dFthB3htYuYt6yQwqAYQ6+wQhsTWV4Ng4a6i:JpcjaKn0MW/3Y1t6yvwbNHi
Malware Config
Extracted
djvu
http://acacaca.org/test3/get.php
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extension
.aamv
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offline_id
MyudhIExJux2oRQXw95TT1oAPu7mvqRMzxr1eet1
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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/3588-133-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3588-134-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5032-136-0x00000000023B0000-0x00000000024CB000-memory.dmp family_djvu behavioral2/memory/3588-137-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3588-138-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3588-142-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4252-145-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4252-147-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4252-152-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4252-160-0x0000000000400000-0x0000000000537000-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 1552 build2.exe 2060 build3.exe 3988 mstsca.exe 4448 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 4448 build2.exe 4448 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 740 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\\9228a6c2-1671-46d9-885d-c7edd6021322\\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 27 api.2ip.ua 20 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 5032 set thread context of 3588 5032 file.exe 83 PID 1356 set thread context of 4252 1356 file.exe 90 PID 1552 set thread context of 4448 1552 build2.exe 110 -
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 428 schtasks.exe 1036 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 2068 timeout.exe -
Kills process with taskkill 1 IoCs
pid Process 1392 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3588 file.exe 3588 file.exe 4252 file.exe 4252 file.exe 4448 build2.exe 4448 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1392 taskkill.exe -
Suspicious use of WriteProcessMemory 56 IoCs
description pid Process procid_target PID 5032 wrote to memory of 3588 5032 file.exe 83 PID 5032 wrote to memory of 3588 5032 file.exe 83 PID 5032 wrote to memory of 3588 5032 file.exe 83 PID 5032 wrote to memory of 3588 5032 file.exe 83 PID 5032 wrote to memory of 3588 5032 file.exe 83 PID 5032 wrote to memory of 3588 5032 file.exe 83 PID 5032 wrote to memory of 3588 5032 file.exe 83 PID 5032 wrote to memory of 3588 5032 file.exe 83 PID 5032 wrote to memory of 3588 5032 file.exe 83 PID 5032 wrote to memory of 3588 5032 file.exe 83 PID 3588 wrote to memory of 740 3588 file.exe 86 PID 3588 wrote to memory of 740 3588 file.exe 86 PID 3588 wrote to memory of 740 3588 file.exe 86 PID 3588 wrote to memory of 1356 3588 file.exe 88 PID 3588 wrote to memory of 1356 3588 file.exe 88 PID 3588 wrote to memory of 1356 3588 file.exe 88 PID 1356 wrote to memory of 4252 1356 file.exe 90 PID 1356 wrote to memory of 4252 1356 file.exe 90 PID 1356 wrote to memory of 4252 1356 file.exe 90 PID 1356 wrote to memory of 4252 1356 file.exe 90 PID 1356 wrote to memory of 4252 1356 file.exe 90 PID 1356 wrote to memory of 4252 1356 file.exe 90 PID 1356 wrote to memory of 4252 1356 file.exe 90 PID 1356 wrote to memory of 4252 1356 file.exe 90 PID 1356 wrote to memory of 4252 1356 file.exe 90 PID 1356 wrote to memory of 4252 1356 file.exe 90 PID 4252 wrote to memory of 1552 4252 file.exe 94 PID 4252 wrote to memory of 1552 4252 file.exe 94 PID 4252 wrote to memory of 1552 4252 file.exe 94 PID 4252 wrote to memory of 2060 4252 file.exe 95 PID 4252 wrote to memory of 2060 4252 file.exe 95 PID 4252 wrote to memory of 2060 4252 file.exe 95 PID 2060 wrote to memory of 428 2060 build3.exe 96 PID 2060 wrote to memory of 428 2060 build3.exe 96 PID 2060 wrote to memory of 428 2060 build3.exe 96 PID 3988 wrote to memory of 1036 3988 mstsca.exe 107 PID 3988 wrote to memory of 1036 3988 mstsca.exe 107 PID 3988 wrote to memory of 1036 3988 mstsca.exe 107 PID 1552 wrote to memory of 4448 1552 build2.exe 110 PID 1552 wrote to memory of 4448 1552 build2.exe 110 PID 1552 wrote to memory of 4448 1552 build2.exe 110 PID 1552 wrote to memory of 4448 1552 build2.exe 110 PID 1552 wrote to memory of 4448 1552 build2.exe 110 PID 1552 wrote to memory of 4448 1552 build2.exe 110 PID 1552 wrote to memory of 4448 1552 build2.exe 110 PID 1552 wrote to memory of 4448 1552 build2.exe 110 PID 1552 wrote to memory of 4448 1552 build2.exe 110 PID 4448 wrote to memory of 1804 4448 build2.exe 111 PID 4448 wrote to memory of 1804 4448 build2.exe 111 PID 4448 wrote to memory of 1804 4448 build2.exe 111 PID 1804 wrote to memory of 1392 1804 cmd.exe 113 PID 1804 wrote to memory of 1392 1804 cmd.exe 113 PID 1804 wrote to memory of 1392 1804 cmd.exe 113 PID 1804 wrote to memory of 2068 1804 cmd.exe 114 PID 1804 wrote to memory of 2068 1804 cmd.exe 114 PID 1804 wrote to memory of 2068 1804 cmd.exe 114
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:5032 -
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:3588 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\9228a6c2-1671-46d9-885d-c7edd6021322" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:740
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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:1356 -
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:4252 -
C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe"C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1552 -
C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe"C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\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:4448 -
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\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build2.exe" & del C:\PrograData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:1804 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1392
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:2068
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C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build3.exe"C:\Users\Admin\AppData\Local\6ee3b96f-de32-4c61-a00b-19e5347c2c6f\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2060 -
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:428
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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:3988 -
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:1036
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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
MD5b81e23282abf26ff287c29581f459679
SHA1b36d2aefcc1ad94c3c5928bef5496fe65502cb64
SHA256dcb926ea6cdebf34bc98470f5eba9af46a718705d9471a8e8ada95428f14cbeb
SHA5122a4f85f111f72d56527008f59efb5966d2003ed9df16a2f17ead72bf3463adbefab739922dbf397ef2b93b10c7eb679363c584e3bb2db276cd8c341e1c805625
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD56cf33634f831091005514317da3c0900
SHA1102f113a05f1f20b4459c4532fe4768b2d1d93a3
SHA256f19e802b98c64c0e400388ee9cf9bd027e180b9ba4900439819ddac6b7efc053
SHA512017b4bfa11706c4e0a216e368dec3590a7b88a7f35509f2e6f9e81b28cc14df059cd79749e51eefcd5bea659555883403f9b3517d72e54231e65f5333a9737cd
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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
821KB
MD5eab9ded288ae44356d1063e5898748d3
SHA14345b26ac78f3eb0ef37e387e91e6ab55a0ef9c2
SHA256528f4b8565a6941bcd72f1f90af1034fe4b93e401609bde90437fba1a3227e2b
SHA5123156c48b49eb9fd8211725fac62cb6a45d0dbc7085dab540348844c52c0d686351a1742d6642b51abdb28f2dd0591dee82a43215a9df0438a4319d791b489c53
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a