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Analysis
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max time kernel
174s -
max time network
186s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
30/12/2023, 08:19
Static task
static1
Behavioral task
behavioral1
Sample
133f6d59b0922074f34b85cc18e5fc8c.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
133f6d59b0922074f34b85cc18e5fc8c.exe
Resource
win10v2004-20231215-en
General
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Target
133f6d59b0922074f34b85cc18e5fc8c.exe
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Size
799KB
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MD5
133f6d59b0922074f34b85cc18e5fc8c
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SHA1
b308f99cf0a6abe5bed4f4153f36fdd0c6efb55b
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SHA256
ce518507120b7ae648448386a36242e32aa7448f7a0a04b388f5d2ce6451ac16
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SHA512
dfaf2556a22d0282e6e1de477c1f0e5f3cf847eb416adc671d7ee108bb267ce2eb34c22ffdb931a804f01670a1db9bd6faf6547abe3a0d22fddae1eb830a53db
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SSDEEP
24576:9kBKLKWeLtatcD5b9IbloyS5l6jLpcCh5aHTlHLm:2QneLtUcDN9IblUz6vja8
Malware Config
Extracted
djvu
http://astdg.top/fhsgtsspen6/get.php
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extension
.nooa
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offline_id
PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1
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payload_url
http://securebiz.org/dl/build2.exe
http://astdg.top/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 11 IoCs
resource yara_rule behavioral2/memory/2996-2-0x0000000003310000-0x000000000342B000-memory.dmp family_djvu behavioral2/memory/1144-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1144-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1144-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1144-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1144-18-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1144-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1144-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1952-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 133f6d59b0922074f34b85cc18e5fc8c.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4900 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a60d409e-150e-4f5e-8978-5c975e4e7f70\\133f6d59b0922074f34b85cc18e5fc8c.exe\" --AutoStart" 133f6d59b0922074f34b85cc18e5fc8c.exe -
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 55 api.2ip.ua 57 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2996 set thread context of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 4452 set thread context of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 2 IoCs
pid pid_target Process procid_target 3004 1952 WerFault.exe 101 3908 1952 WerFault.exe 101 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1144 133f6d59b0922074f34b85cc18e5fc8c.exe 1144 133f6d59b0922074f34b85cc18e5fc8c.exe -
Suspicious use of WriteProcessMemory 29 IoCs
description pid Process procid_target PID 2996 wrote to memory of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 2996 wrote to memory of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 2996 wrote to memory of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 2996 wrote to memory of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 2996 wrote to memory of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 2996 wrote to memory of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 2996 wrote to memory of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 2996 wrote to memory of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 2996 wrote to memory of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 2996 wrote to memory of 1144 2996 133f6d59b0922074f34b85cc18e5fc8c.exe 91 PID 1144 wrote to memory of 4900 1144 133f6d59b0922074f34b85cc18e5fc8c.exe 96 PID 1144 wrote to memory of 4900 1144 133f6d59b0922074f34b85cc18e5fc8c.exe 96 PID 1144 wrote to memory of 4900 1144 133f6d59b0922074f34b85cc18e5fc8c.exe 96 PID 1144 wrote to memory of 4452 1144 133f6d59b0922074f34b85cc18e5fc8c.exe 99 PID 1144 wrote to memory of 4452 1144 133f6d59b0922074f34b85cc18e5fc8c.exe 99 PID 1144 wrote to memory of 4452 1144 133f6d59b0922074f34b85cc18e5fc8c.exe 99 PID 4452 wrote to memory of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 PID 4452 wrote to memory of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 PID 4452 wrote to memory of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 PID 4452 wrote to memory of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 PID 4452 wrote to memory of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 PID 4452 wrote to memory of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 PID 4452 wrote to memory of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 PID 4452 wrote to memory of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 PID 4452 wrote to memory of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 PID 4452 wrote to memory of 1952 4452 133f6d59b0922074f34b85cc18e5fc8c.exe 101 PID 1952 wrote to memory of 3004 1952 133f6d59b0922074f34b85cc18e5fc8c.exe 106 PID 1952 wrote to memory of 3004 1952 133f6d59b0922074f34b85cc18e5fc8c.exe 106 PID 1952 wrote to memory of 3004 1952 133f6d59b0922074f34b85cc18e5fc8c.exe 106
Processes
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C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe"C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2996 -
C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe"C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1144 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\a60d409e-150e-4f5e-8978-5c975e4e7f70" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4900
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C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe"C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4452 -
C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe"C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious use of WriteProcessMemory
PID:1952 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 5685⤵
- Program crash
PID:3004
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 5685⤵
- Program crash
PID:3908
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1952 -ip 19521⤵PID:4796
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\a60d409e-150e-4f5e-8978-5c975e4e7f70\133f6d59b0922074f34b85cc18e5fc8c.exe
Filesize799KB
MD5133f6d59b0922074f34b85cc18e5fc8c
SHA1b308f99cf0a6abe5bed4f4153f36fdd0c6efb55b
SHA256ce518507120b7ae648448386a36242e32aa7448f7a0a04b388f5d2ce6451ac16
SHA512dfaf2556a22d0282e6e1de477c1f0e5f3cf847eb416adc671d7ee108bb267ce2eb34c22ffdb931a804f01670a1db9bd6faf6547abe3a0d22fddae1eb830a53db