Analysis
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max time kernel
82s -
max time network
140s -
platform
windows10-1703_x64 -
resource
win10-20220812-en -
resource tags
arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system -
submitted
05/12/2022, 12:17
Static task
static1
Behavioral task
behavioral1
Sample
2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe
Resource
win10-20220812-en
General
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Target
2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe
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Size
779KB
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MD5
1b49e27f89805075fd9572449ed2fdab
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SHA1
f5a811e69beec50f54e57992c9d31c2c96b52a2e
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SHA256
2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364
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SHA512
d24749d0dca42b6977261d837c7c1eda88a5db4b95e5ec59d7ae7d8be2fc74ff66181ea016e89c73e4a59dec17b0ec45cece4ff07527cf138578f0a5643dd3b1
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SSDEEP
24576:e6WejFeWZg1vDGsIDJBNJmtm4pj5gZbxnr:erejFeWZIvD09FmFs
Malware Config
Extracted
djvu
http://fresherlights.com/test1/get.php
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extension
.mppn
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offline_id
d1BN9KEra4Hetg5GUH0nQZqy14sntD2NbihzGQt1
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payload_url
http://uaery.top/dl/build2.exe
http://fresherlights.com/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 behavioral1/memory/2760-138-0x00000000022B0000-0x00000000023CB000-memory.dmp family_djvu behavioral1/memory/5008-150-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5008-151-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/5008-157-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5008-196-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5008-257-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5008-260-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1008-279-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/1008-335-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1008-366-0x0000000000400000-0x0000000000537000-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 2 IoCs
pid Process 5044 build3.exe 328 mstsca.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 1380 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2482096546-1136599444-1359412500-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\9807688c-7e04-4e28-b6d5-6e4375125d70\\2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe\" --AutoStart" 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe -
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 1 api.2ip.ua 2 api.2ip.ua 10 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2760 set thread context of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 4840 set thread context of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2196 schtasks.exe 928 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 5008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 5008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 1008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 1008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe -
Suspicious use of WriteProcessMemory 35 IoCs
description pid Process procid_target PID 2760 wrote to memory of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 2760 wrote to memory of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 2760 wrote to memory of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 2760 wrote to memory of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 2760 wrote to memory of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 2760 wrote to memory of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 2760 wrote to memory of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 2760 wrote to memory of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 2760 wrote to memory of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 2760 wrote to memory of 5008 2760 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 66 PID 5008 wrote to memory of 1380 5008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 67 PID 5008 wrote to memory of 1380 5008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 67 PID 5008 wrote to memory of 1380 5008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 67 PID 5008 wrote to memory of 4840 5008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 68 PID 5008 wrote to memory of 4840 5008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 68 PID 5008 wrote to memory of 4840 5008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 68 PID 4840 wrote to memory of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 PID 4840 wrote to memory of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 PID 4840 wrote to memory of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 PID 4840 wrote to memory of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 PID 4840 wrote to memory of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 PID 4840 wrote to memory of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 PID 4840 wrote to memory of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 PID 4840 wrote to memory of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 PID 4840 wrote to memory of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 PID 4840 wrote to memory of 1008 4840 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 70 PID 1008 wrote to memory of 5044 1008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 71 PID 1008 wrote to memory of 5044 1008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 71 PID 1008 wrote to memory of 5044 1008 2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe 71 PID 5044 wrote to memory of 2196 5044 build3.exe 72 PID 5044 wrote to memory of 2196 5044 build3.exe 72 PID 5044 wrote to memory of 2196 5044 build3.exe 72 PID 328 wrote to memory of 928 328 mstsca.exe 75 PID 328 wrote to memory of 928 328 mstsca.exe 75 PID 328 wrote to memory of 928 328 mstsca.exe 75
Processes
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C:\Users\Admin\AppData\Local\Temp\2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe"C:\Users\Admin\AppData\Local\Temp\2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2760 -
C:\Users\Admin\AppData\Local\Temp\2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe"C:\Users\Admin\AppData\Local\Temp\2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5008 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\9807688c-7e04-4e28-b6d5-6e4375125d70" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1380
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C:\Users\Admin\AppData\Local\Temp\2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe"C:\Users\Admin\AppData\Local\Temp\2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4840 -
C:\Users\Admin\AppData\Local\Temp\2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe"C:\Users\Admin\AppData\Local\Temp\2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1008 -
C:\Users\Admin\AppData\Local\e597b889-9c90-4dd4-b3e0-e2aa5549b634\build3.exe"C:\Users\Admin\AppData\Local\e597b889-9c90-4dd4-b3e0-e2aa5549b634\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:5044 -
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:2196
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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:328 -
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:928
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD597acf0930ce9f2f69d40ed8e1178cec6
SHA16380a2d97e4b4ccc3b4598cc2d431702e54ed69c
SHA256b38f02de41dbb7db433a5f440dff85432150ff71d53b7ef8792d96da80962343
SHA512f49c8a4fa51127e7d8b71cd0257bbedc8855ea708ec0e313e5071b656aedb815b55e51619df24ed967c4df0e685a4940cc1f123aa4ee0198a3d1ada1b42480e1
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD5c51850a96d359a09a3a3a2249c52a92d
SHA14a4606bc3ebee0d4cf4a0f028d931945490d2665
SHA256d66175ec867bee8f450f2f3ad05d9d161384241244e6d5cf791a608dd31ef175
SHA512832204ccb7f74e8fd1e5f3ae2485227d94f4c5ae025695369e8affacb49307b3f2a20bac69a52d9835338bc84271cd3d1c7675f7f6a7f7a25e6f85141027dff6
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD5ae9b2da0662a1388b857020ebf1094db
SHA1e10d715f838279df4e8e4a7ac29dd8c1886dd622
SHA25608289214e2d549f1e2ace829c0c1fc4e18a7d571879b9b127b6a57db995e3a44
SHA5120a69700c8d668991d2a25af157a8b0c1d7f5845630209b48f9f5ce6e1a55e4407f9549a604ba808e6c58cbe841eab2f57a9580c9cce3fc2b545fc9f8591b33d0
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD58417e6337655cdb1062c08eba8c3cb20
SHA16572d559c7a617e3bbedd1e507a3aa31b2535f88
SHA256240f7cd80e974edba8dd16d909aaa281daef249a1b0c1ed9a4cff0305a3403af
SHA512be8b96ae33eda45f0e2ec04658125ac81eae7dca41d60cadf5914b66aa46f24ca8240478f077f65e9732dc6489f9b394e54499d593bbc467996b789a996a2db4
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C:\Users\Admin\AppData\Local\9807688c-7e04-4e28-b6d5-6e4375125d70\2262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364.exe
Filesize779KB
MD51b49e27f89805075fd9572449ed2fdab
SHA1f5a811e69beec50f54e57992c9d31c2c96b52a2e
SHA2562262bb38413e35bc46b83cd0b68a0fce2cd47988f8ccca14be63f8fd74171364
SHA512d24749d0dca42b6977261d837c7c1eda88a5db4b95e5ec59d7ae7d8be2fc74ff66181ea016e89c73e4a59dec17b0ec45cece4ff07527cf138578f0a5643dd3b1
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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