Malware Analysis Report

2025-08-06 04:33

Sample ID 240126-g4lzhahbbq
Target 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop
SHA256 c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400
Tags
djvu discovery persistence ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400

Threat Level: Known bad

The file 2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop was found to be: Known bad.

Malicious Activity Summary

djvu discovery persistence ransomware

Detected Djvu ransomware

Djvu family

Djvu Ransomware

Modifies file permissions

Checks computer location settings

Adds Run key to start application

Looks up external IP address via web service

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-26 06:21

Signatures

Detected Djvu ransomware

Description Indicator Process Target
N/A N/A N/A N/A

Djvu family

djvu

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-26 06:21

Reported

2024-01-26 06:24

Platform

win7-20231215-en

Max time kernel

140s

Max time network

140s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe"

Signatures

Detected Djvu ransomware

Description Indicator Process Target
N/A N/A N/A N/A

Djvu Ransomware

ransomware djvu

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\icacls.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d45561ba-d9af-44d8-83d8-31c929b151e5\\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A api.2ip.ua N/A N/A
N/A api.2ip.ua N/A N/A
N/A api.2ip.ua N/A N/A

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1784 wrote to memory of 2724 N/A C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 1784 wrote to memory of 2724 N/A C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 1784 wrote to memory of 2724 N/A C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 1784 wrote to memory of 2724 N/A C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 1784 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe
PID 1784 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe
PID 1784 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe
PID 1784 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\d45561ba-d9af-44d8-83d8-31c929b151e5" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe" --Admin IsNotAutoStart IsNotTask

Network

Country Destination Domain Proto
US 8.8.8.8:53 api.2ip.ua udp
US 172.67.139.220:443 api.2ip.ua tcp
US 172.67.139.220:443 api.2ip.ua tcp
US 8.8.8.8:53 colisumy.com udp
US 8.8.8.8:53 zexeq.com udp
US 199.59.242.150:80 zexeq.com tcp

Files

C:\Users\Admin\AppData\Local\d45561ba-d9af-44d8-83d8-31c929b151e5\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe

MD5 5cacd6f1b5cec25f3f0b0b3c4d5807d3
SHA1 41b8851bc57462502b0113ee1f2579dff5d94f4f
SHA256 c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400
SHA512 7d46037825e5f34f02105c45ee05e03e4c2d7e73889a43c4e47704e27e563cae63f5d0dffb01a2d628ad0b3962e31cebf44dbed5892b6e1a995c45ee2c0714b4

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

MD5 337bc85d3bf6d4743c6f8d9d522049dc
SHA1 e9f8fc10f4e51b41bb5a39f28a452cafd556b33f
SHA256 415a8e78c7bc700a8c656cbdb3f93d3e7000d1c881b8bb2a9099091eae316304
SHA512 a3e53adf31899650375a2727884a763b93ce5a2d56b7ca987d616eac1f56494309ed957e6dc9e0d778c511c055e48cf255fbb514593451c5c5b39e84a6ebf4b0

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

MD5 8daed5fecd6b7116eb16ea66eda552e0
SHA1 bb2149a2541f11dc4da8df7f4579dd65c341ce8b
SHA256 076f87f4acbece273de34b83b72bb1a4cf38135f1cf27c49722ce8dfe5c60d71
SHA512 eeb7e9bea6db27a316e09dd4cdaae0ccbb3d895e56dad92f54e59a6bb13e450fb6bfb09972f7a23aadba82960af004a7b72852d477b14b80d9d5a68dd6859fc7

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

MD5 28079b21f0900600d2886a7ace964a5d
SHA1 cf54dde59d38138c68bdbbbc54ddf9619be62eae
SHA256 033c97658e0a97fcf81d21507b2321cabf28194b8084df18529beaa266ef9423
SHA512 f3f90e6a308d268c3084da18a14e4637b4d5931d10a0db28e22bb01f8345a1a09e679db65404091acb16afdd05659cc84115588419726ab0d7d7629a427b7357

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

MD5 61d57fc111152577c747f945f981a007
SHA1 408c6d0996c50510b8a10d9a43e6339ebf0f6183
SHA256 deb826f3401508280aed829b3de31c0e86fccb7e4d413e3adae8d866d9b4e5aa
SHA512 aea61d9b3a1e91a248f8b7954eb3b64fc96fb3e59ec50a042759af9b1762a9a16c0fc1e2265387944eca218c07472120fde945e033be5d4245133e444f92d170

C:\Users\Admin\AppData\Local\Temp\Cab1620.tmp

MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-26 06:21

Reported

2024-01-26 06:24

Platform

win10v2004-20231222-en

Max time kernel

86s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe"

Signatures

Detected Djvu ransomware

Description Indicator Process Target
N/A N/A N/A N/A

Djvu Ransomware

ransomware djvu

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe N/A

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\icacls.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\88287fd5-0f51-4ef2-83b0-6d4eed0ca0e4\\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A api.2ip.ua N/A N/A
N/A api.2ip.ua N/A N/A
N/A api.2ip.ua N/A N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\88287fd5-0f51-4ef2-83b0-6d4eed0ca0e4" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe" --Admin IsNotAutoStart IsNotTask

Network

Country Destination Domain Proto
US 8.8.8.8:53 api.2ip.ua udp
US 172.67.139.220:443 api.2ip.ua tcp
US 8.8.8.8:53 220.139.67.172.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 172.67.139.220:443 api.2ip.ua tcp
US 8.8.8.8:53 colisumy.com udp
US 8.8.8.8:53 zexeq.com udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 199.59.242.150:80 zexeq.com tcp
US 199.59.242.150:80 zexeq.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 150.242.59.199.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\88287fd5-0f51-4ef2-83b0-6d4eed0ca0e4\2024-01-26_5cacd6f1b5cec25f3f0b0b3c4d5807d3_stop.exe

MD5 5cacd6f1b5cec25f3f0b0b3c4d5807d3
SHA1 41b8851bc57462502b0113ee1f2579dff5d94f4f
SHA256 c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400
SHA512 7d46037825e5f34f02105c45ee05e03e4c2d7e73889a43c4e47704e27e563cae63f5d0dffb01a2d628ad0b3962e31cebf44dbed5892b6e1a995c45ee2c0714b4

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

MD5 cb767efea648e7ee7d43d1b8a745f8da
SHA1 4acbb3acaeb44cbc73fdc2cdf906569e755bb401
SHA256 ef3f5e08dd5568da42bf9dbf29638529abb776d8290345c2c25be375a0a62b01
SHA512 815ac3e11f0bfa170d6a19e811691801859712e9a17671f5beee41a1a7ccc9e58be7404b852b6f39d759289d6a5c9b8c012fea5a15d27d23ca596298ff575c78

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

MD5 8daed5fecd6b7116eb16ea66eda552e0
SHA1 bb2149a2541f11dc4da8df7f4579dd65c341ce8b
SHA256 076f87f4acbece273de34b83b72bb1a4cf38135f1cf27c49722ce8dfe5c60d71
SHA512 eeb7e9bea6db27a316e09dd4cdaae0ccbb3d895e56dad92f54e59a6bb13e450fb6bfb09972f7a23aadba82960af004a7b72852d477b14b80d9d5a68dd6859fc7

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

MD5 c9571b842d2b33d1d800a8e5b2cbcd44
SHA1 8fd8d53d1489ba4a8ee03b73324fafde93e617b7
SHA256 040ee48c9f7e87642537425106d7e84d18983a3637b70a20c7afa4f95a2be71f
SHA512 191d326e9dd821e1e8dadad9f8833b9ab6d195eb54430e5777327109f9c234160425be5a2dd6eec3ce9faa7cefce4322729238632f88ee32bcb62ad43f7ddcb8

C:\Users\Admin\AppData\Local\8bbf0cd2-1e53-4eeb-b685-d9b78a8a2442\build3.exe

MD5 61bb6956d202cdd7d061a546d2f00162
SHA1 de5f774f3b949d3b226cf097d221652fc4cd9bcc
SHA256 3f8372424f809ca0ac4e87a6e9ca057d401b5c9797d339c2c553e00f32b9be29
SHA512 90214586fd1ca92c0d15d9140c6897c1c442a31152128d9b3716245ea33b772680d0b6251f85334c9a0c687765350d04008aba9e3aee02f2b083e7a98d64c8e6