Analysis
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max time kernel
70s -
max time network
178s -
platform
windows10-1703_x64 -
resource
win10-20220812-en -
resource tags
arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system -
submitted
20-09-2022 14:12
Static task
static1
Behavioral task
behavioral1
Sample
94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe
Resource
win10-20220812-en
General
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Target
94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe
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Size
725KB
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MD5
ffb4f45768fd4a36dc6e1bd8863d187a
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SHA1
de0c631a2b42181e2980a75e5442f8cd67106d98
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SHA256
94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020
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SHA512
25ee6c0ea6b70fba955d3746d9d1651d41fcedddd74cc694ff9134af26ba7090fa8704ddff5bea585b411be5b5c4d493cd37f9cac2269d74c6517247db5a7b73
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SSDEEP
12288:3xYL/fMS4wmbI13/Yfm2/ctvFJ+1B2Ypxcn0Li4bGpIVeo0J1c0m:3xYL/Ywj13guu8z+1B2YpjQDo0J1c
Malware Config
Extracted
djvu
http://acacaca.org/test3/get.php
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extension
.mmvb
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offline_id
yd6oYv6aBN90yFzTWdZ34sXSXtXiauzOLXZyWht1
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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 8 IoCs
resource yara_rule behavioral2/memory/1776-145-0x0000000004900000-0x0000000004A1B000-memory.dmp family_djvu behavioral2/memory/4752-146-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4752-147-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/4752-153-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4752-211-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4752-247-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4264-273-0x0000000000424141-mapping.dmp family_djvu behavioral2/memory/4264-332-0x0000000000400000-0x0000000000537000-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 4464 build2.exe 416 build3.exe 1460 build2.exe 3516 mstsca.exe -
Loads dropped DLL 2 IoCs
pid Process 1460 build2.exe 1460 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4864 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-1-5-21-1099808672-3828198950-1535142148-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d64f66c0-0793-47bb-9b5a-22b23619a56c\\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe\" --AutoStart" 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.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 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 1 api.2ip.ua 2 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 1776 set thread context of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 2212 set thread context of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 4464 set thread context of 1460 4464 build2.exe 73 -
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 216 schtasks.exe 4592 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 4992 timeout.exe -
Kills process with taskkill 1 IoCs
pid Process 3592 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4752 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 4752 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 4264 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 4264 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 1460 build2.exe 1460 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3592 taskkill.exe -
Suspicious use of WriteProcessMemory 56 IoCs
description pid Process procid_target PID 1776 wrote to memory of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 1776 wrote to memory of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 1776 wrote to memory of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 1776 wrote to memory of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 1776 wrote to memory of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 1776 wrote to memory of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 1776 wrote to memory of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 1776 wrote to memory of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 1776 wrote to memory of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 1776 wrote to memory of 4752 1776 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 66 PID 4752 wrote to memory of 4864 4752 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 67 PID 4752 wrote to memory of 4864 4752 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 67 PID 4752 wrote to memory of 4864 4752 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 67 PID 4752 wrote to memory of 2212 4752 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 68 PID 4752 wrote to memory of 2212 4752 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 68 PID 4752 wrote to memory of 2212 4752 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 68 PID 2212 wrote to memory of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 2212 wrote to memory of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 2212 wrote to memory of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 2212 wrote to memory of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 2212 wrote to memory of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 2212 wrote to memory of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 2212 wrote to memory of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 2212 wrote to memory of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 2212 wrote to memory of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 2212 wrote to memory of 4264 2212 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 70 PID 4264 wrote to memory of 4464 4264 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 71 PID 4264 wrote to memory of 4464 4264 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 71 PID 4264 wrote to memory of 4464 4264 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 71 PID 4264 wrote to memory of 416 4264 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 72 PID 4264 wrote to memory of 416 4264 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 72 PID 4264 wrote to memory of 416 4264 94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe 72 PID 4464 wrote to memory of 1460 4464 build2.exe 73 PID 4464 wrote to memory of 1460 4464 build2.exe 73 PID 4464 wrote to memory of 1460 4464 build2.exe 73 PID 4464 wrote to memory of 1460 4464 build2.exe 73 PID 4464 wrote to memory of 1460 4464 build2.exe 73 PID 4464 wrote to memory of 1460 4464 build2.exe 73 PID 4464 wrote to memory of 1460 4464 build2.exe 73 PID 4464 wrote to memory of 1460 4464 build2.exe 73 PID 4464 wrote to memory of 1460 4464 build2.exe 73 PID 416 wrote to memory of 216 416 build3.exe 74 PID 416 wrote to memory of 216 416 build3.exe 74 PID 416 wrote to memory of 216 416 build3.exe 74 PID 1460 wrote to memory of 3676 1460 build2.exe 76 PID 1460 wrote to memory of 3676 1460 build2.exe 76 PID 1460 wrote to memory of 3676 1460 build2.exe 76 PID 3676 wrote to memory of 3592 3676 cmd.exe 78 PID 3676 wrote to memory of 3592 3676 cmd.exe 78 PID 3676 wrote to memory of 3592 3676 cmd.exe 78 PID 3676 wrote to memory of 4992 3676 cmd.exe 80 PID 3676 wrote to memory of 4992 3676 cmd.exe 80 PID 3676 wrote to memory of 4992 3676 cmd.exe 80 PID 3516 wrote to memory of 4592 3516 mstsca.exe 82 PID 3516 wrote to memory of 4592 3516 mstsca.exe 82 PID 3516 wrote to memory of 4592 3516 mstsca.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe"C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1776 -
C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe"C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4752 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\d64f66c0-0793-47bb-9b5a-22b23619a56c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4864
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C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe"C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2212 -
C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe"C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4264 -
C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe"C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4464 -
C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe"C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1460 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" 116.203.7.175/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe" & del C:\PrograData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:3676 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3592
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:4992
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C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build3.exe"C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:416 -
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:216
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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:3516 -
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:4592
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
246KB
MD54e08ecaa075b90f30327bf200d23130b
SHA1f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2
SHA2566c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47
SHA512e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7
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Filesize
246KB
MD54e08ecaa075b90f30327bf200d23130b
SHA1f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2
SHA2566c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47
SHA512e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7
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Filesize
246KB
MD54e08ecaa075b90f30327bf200d23130b
SHA1f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2
SHA2566c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47
SHA512e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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C:\Users\Admin\AppData\Local\d64f66c0-0793-47bb-9b5a-22b23619a56c\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe
Filesize725KB
MD5ffb4f45768fd4a36dc6e1bd8863d187a
SHA1de0c631a2b42181e2980a75e5442f8cd67106d98
SHA25694136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020
SHA51225ee6c0ea6b70fba955d3746d9d1651d41fcedddd74cc694ff9134af26ba7090fa8704ddff5bea585b411be5b5c4d493cd37f9cac2269d74c6517247db5a7b73
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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
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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Filesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571