Malware Analysis Report

2024-10-19 01:46

Sample ID 240809-eqy1sszfrd
Target 2024-08-09_f32df0dde450209b1a85d594220c388c_stop
SHA256 3be9cda8c1bc83adc04bf96d4c8376959698698dd8b09ac48c4a506d2f0ef98e
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

3be9cda8c1bc83adc04bf96d4c8376959698698dd8b09ac48c4a506d2f0ef98e

Threat Level: Known bad

The file 2024-08-09_f32df0dde450209b1a85d594220c388c_stop was found to be: Known bad.

Malicious Activity Summary

djvu discovery persistence ransomware

Detected Djvu ransomware

Djvu Ransomware

Djvu family

Modifies file permissions

Checks computer location settings

Adds Run key to start application

Looks up external IP address via web service

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-09 04:09

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

2024-08-09 04:09

Reported

2024-08-09 04:11

Platform

win7-20240704-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_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-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e947bdff-abfc-420e-93e0-155fcb140051\\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\icacls.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1952 wrote to memory of 2712 N/A C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 1952 wrote to memory of 2712 N/A C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 1952 wrote to memory of 2712 N/A C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 1952 wrote to memory of 2712 N/A C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 1952 wrote to memory of 2752 N/A C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe
PID 1952 wrote to memory of 2752 N/A C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe
PID 1952 wrote to memory of 2752 N/A C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe
PID 1952 wrote to memory of 2752 N/A C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\e947bdff-abfc-420e-93e0-155fcb140051" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_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 c.pki.goog udp
NL 142.250.179.131:80 c.pki.goog tcp
US 172.67.139.220:443 api.2ip.ua tcp
US 8.8.8.8:53 uaery.top udp
US 8.8.8.8:53 spaceris.com udp
US 204.11.56.48:80 spaceris.com tcp
US 204.11.56.48:80 spaceris.com tcp
US 204.11.56.48:80 spaceris.com tcp
US 204.11.56.48:80 spaceris.com tcp
US 204.11.56.48:80 spaceris.com tcp
US 8.8.8.8:53 crl.microsoft.com udp
GB 92.123.143.234:80 crl.microsoft.com tcp

Files

C:\Users\Admin\AppData\Local\e947bdff-abfc-420e-93e0-155fcb140051\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe

MD5 f32df0dde450209b1a85d594220c388c
SHA1 79f1621964fe7f663cb51e7806d9979e070cac39
SHA256 3be9cda8c1bc83adc04bf96d4c8376959698698dd8b09ac48c4a506d2f0ef98e
SHA512 8d37806404df35922fb54045346c23b46ca54c4538ade6078e19ee15240d587ddb6c2adfa44b5ad2aa08e141cd8290a47a65c63c027672b4555abbcb08af7787

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

MD5 ee243bade072dc5608a576eef0b657de
SHA1 2a5109c80bc3840555e3d7263c047b08e5c4bedf
SHA256 3b95aedd8458ce749168721e5823c8e87fa94ce831c2d20bf0ed902866fa64be
SHA512 29f6646d255044397c87be64223e4b8b6355c85a95275f6a60d2c248d62111125707dde1d4b8750e557afff2eda8c53e82c11bdd6d68d96e24ee68400bc0cf2f

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

MD5 7fb5fa1534dcf77f2125b2403b30a0ee
SHA1 365d96812a69ac0a4611ea4b70a3f306576cc3ea
SHA256 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
SHA512 a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

MD5 e1ac0f35789dd37d0cba914bbe18e278
SHA1 f51680e6bd5c8e3716747d7077976c7f43df67b8
SHA256 72a8cde0adda5104df6f08d2f64cfe5e38eaa56a59eac351927386ce10a3ed18
SHA512 31189cb1cc14ae829cf2fd3743214ce070e102dc888aaeb533638c5ebe9e5dba88f89be0e09c160aa2304cbb86988acbec50113b76ea744153897c735eb60282

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

MD5 971c514f84bba0785f80aa1c23edfd79
SHA1 732acea710a87530c6b08ecdf32a110d254a54c8
SHA256 f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
SHA512 43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

C:\Users\Admin\AppData\Local\Temp\CabC764.tmp

MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-09 04:09

Reported

2024-08-09 04:11

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_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-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d2ab89ff-fcc6-4aeb-a119-45f2fe95bc3e\\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\icacls.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\d2ab89ff-fcc6-4aeb-a119-45f2fe95bc3e" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe" --Admin IsNotAutoStart IsNotTask

Network

Country Destination Domain Proto
US 8.8.8.8:53 api.2ip.ua udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 104.21.65.24:443 api.2ip.ua tcp
US 8.8.8.8:53 c.pki.goog udp
NL 142.250.179.131:80 c.pki.goog tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 24.65.21.104.in-addr.arpa udp
US 8.8.8.8:53 131.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 104.21.65.24:443 api.2ip.ua tcp
US 8.8.8.8:53 uaery.top udp
US 8.8.8.8:53 spaceris.com udp
US 204.11.56.48:80 spaceris.com tcp
US 204.11.56.48:80 spaceris.com tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 48.56.11.204.in-addr.arpa udp
US 204.11.56.48:80 spaceris.com tcp
US 204.11.56.48:80 spaceris.com tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\d2ab89ff-fcc6-4aeb-a119-45f2fe95bc3e\2024-08-09_f32df0dde450209b1a85d594220c388c_stop.exe

MD5 f32df0dde450209b1a85d594220c388c
SHA1 79f1621964fe7f663cb51e7806d9979e070cac39
SHA256 3be9cda8c1bc83adc04bf96d4c8376959698698dd8b09ac48c4a506d2f0ef98e
SHA512 8d37806404df35922fb54045346c23b46ca54c4538ade6078e19ee15240d587ddb6c2adfa44b5ad2aa08e141cd8290a47a65c63c027672b4555abbcb08af7787

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

MD5 7fb5fa1534dcf77f2125b2403b30a0ee
SHA1 365d96812a69ac0a4611ea4b70a3f306576cc3ea
SHA256 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
SHA512 a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

MD5 19baff0e4adb1a3a97a01ed24ff7736d
SHA1 955d18889fa68619eeebf5358d19c60d9a34e259
SHA256 a0f58384560e33ce1b52160fc6e30d97020e1eee6ef29ff5e0fca4ce386dc612
SHA512 84241f38cf0a15df815f9467ca1b4de06865254a97237e7e151441e474110b515ea1a97f8d588cc723e4869f2f6bf577af5edbcccc9843fa426d225931c79c9b

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

MD5 971c514f84bba0785f80aa1c23edfd79
SHA1 732acea710a87530c6b08ecdf32a110d254a54c8
SHA256 f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
SHA512 43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

MD5 74393acf44d29914d97fa53b6c45c57f
SHA1 e02b11e67ec5a729b10638584f83c3c2b9206dbd
SHA256 d4081340fd11e228ccec12e90f5e167eb22f39cebf9f6077c1425c033a6a0463
SHA512 257905fe049fa24cfe4ad6e4ddad91b6741e3a3420e9c6caf37f4a6626c9c66d53b1c060746cdea5375c4f4d74b7b69c157c0a45319a480d6195727cba82ca6c