Malware Analysis Report

2025-08-06 04:33

Sample ID 240126-axb3dsbegl
Target baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe
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 baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe was found to be: Known bad.

Malicious Activity Summary

djvu discovery persistence ransomware

Djvu family

Djvu Ransomware

Detected Djvu ransomware

Checks computer location settings

Modifies file permissions

Adds Run key to start application

Looks up external IP address via web service

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-26 00:35

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 00:35

Reported

2024-01-26 00:37

Platform

win7-20231215-en

Max time kernel

141s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.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-1-5-21-928733405-3780110381-2966456290-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\80629fa6-aabd-4342-bf33-51ba37ec3963\\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.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 2304 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Windows\SysWOW64\icacls.exe
PID 2304 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Windows\SysWOW64\icacls.exe
PID 2304 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Windows\SysWOW64\icacls.exe
PID 2304 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Windows\SysWOW64\icacls.exe
PID 2304 wrote to memory of 2944 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe
PID 2304 wrote to memory of 2944 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe
PID 2304 wrote to memory of 2944 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe
PID 2304 wrote to memory of 2944 N/A C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

Processes

C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\80629fa6-aabd-4342-bf33-51ba37ec3963" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.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\80629fa6-aabd-4342-bf33-51ba37ec3963\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

MD5 9541054eeb5fa81602eaf1e87bf2b69b
SHA1 1ff3310f938e020b82297ada977ad78a99ee8a7f
SHA256 45fb722d82b10715948bca22d7ffe195d8ae2b8564302626f0d1f9d07019b743
SHA512 7bbcf0c657877a01459aa305387a0815e9015909479966efbf8f461f89753050126e326fbe30c3a08de2a3aae7f0d7abe78ed4bd62482c8400eb8e528139e39f

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

MD5 1a1023fa007e8ba4da518bb7588c72e0
SHA1 f2e51c695b5a7732b1d75f7c1d8163118a619149
SHA256 af89d12c0d0d6208a097b9fe0c017db36e6acb3f07f252fb56334e6a7900b87e
SHA512 6b120fb2d276b5a1f1f267300553f5a6fc088b2ddb2611dba6e50b1bfd295b8ac3fea393bc0ad802af8b7ea3141df26f9de708760ba67b88615f20692593ae71

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 a3431eaa5b5f46f2f19ec2f450b07094
SHA1 00c8f1a05b460bb8529d043f4297737c2147a411
SHA256 8aff58ac3034e04eb65623d29b3762a49ba4c9186d625cb4eecadc76418ee2fa
SHA512 59016273fd4064708f1a8250a07e463eb51d4e5760e9ab8c104a14546d7250305f6f45a1b16882746ddfb1fcf9d3c79d077079b5954aab4d77d7357d740c7c8a

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 65e5309a2432702c16c05765ce26072d
SHA1 94ab9a293994468df20adf403b16beda6ed3f83b
SHA256 0e56b5bf4a6253b18e196094a80dbe5b32dca38f3d75f98cab45a442bea6d8a5
SHA512 24466d410f80c97c78c142f3761807c20064a7f7c5dad3dd298868953418a11c78eb800d082518c856cb32c24aa3dc806ac87dab1ab84fda30961671899bd05b

C:\Users\Admin\AppData\Local\Temp\Cab5023.tmp

MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-26 00:35

Reported

2024-01-26 00:37

Platform

win10v2004-20231222-en

Max time kernel

88s

Max time network

132s

Command Line

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.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\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.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\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.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\\60696e1b-51a9-4d2f-8179-784bccbfb447\\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.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\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\60696e1b-51a9-4d2f-8179-784bccbfb447" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

"C:\Users\Admin\AppData\Local\Temp\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe" --Admin IsNotAutoStart IsNotTask

Network

Country Destination Domain Proto
US 8.8.8.8:53 api.2ip.ua udp
US 104.21.65.24:443 api.2ip.ua tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 104.21.65.24:443 api.2ip.ua tcp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 24.65.21.104.in-addr.arpa udp
US 8.8.8.8:53 99.201.58.216.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
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
US 199.59.242.150:80 zexeq.com tcp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 150.242.59.199.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\60696e1b-51a9-4d2f-8179-784bccbfb447\baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe

MD5 5cacd6f1b5cec25f3f0b0b3c4d5807d3
SHA1 41b8851bc57462502b0113ee1f2579dff5d94f4f
SHA256 c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400
SHA512 7d46037825e5f34f02105c45ee05e03e4c2d7e73889a43c4e47704e27e563cae63f5d0dffb01a2d628ad0b3962e31cebf44dbed5892b6e1a995c45ee2c0714b4

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 0ab2bd0fcf48b541a5b7a51b9f7131f5
SHA1 a81255d3cb310031e9faf216de8385b443ddf826
SHA256 32198fdbaebc1cc58994be84163747d3247423bcd63e58e12126d21dbf730d85
SHA512 dcb837aa65d02816f1c361e0ae3f874e0efb056b29ee198115d67300c34e154753650abf9a420956dcf3d7319dd62c9d62aa54b8c75a352078079c384e3ead97

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

MD5 1b0e6edb5ebefcdc7ad90d3abf72b8ad
SHA1 f5af626c3bd2c5828d41dc15ac513293c8e579ea
SHA256 02457be1098c630162842a0ffdd28190bd28746e3120ae752446cadf8bf364e3
SHA512 a65166f2b89a38a54104e26d5ab457078dcc9762ff0fc2bdd80c5bd4f0ef50816d3664e91f530b73315098462d02bed10786049a9d0d7d949cf28fbe6fdd774a

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

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

C:\Users\Admin\AppData\Local\f83ca8ab-ab8c-4161-8710-ebf5037566d3\build3.exe

MD5 079a12682aa78bcd3be1f4375ab26c16
SHA1 454f42df7b4de7d5cdea942ded1e28e443007360
SHA256 b14059bf48468fb54d17d6d8484a217e8d8f7a7e05eee81d2d0f2fd35a841df5
SHA512 c349c3042c5913da54f2770f2ae1748fc5cae5c3d4a0e0ec10724329f0ad3c91054f6614af0a0ee981911436033f2e297e0053f1b769c4e457f558ffacec3c7a