Malware Analysis Report

2024-10-23 16:21

Sample ID 240906-c37glasbka
Target 2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop
SHA256 e3c13b76ee87295fba416b8c5348ecd434e78b45fa6060820245711f3ea80a7d
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

e3c13b76ee87295fba416b8c5348ecd434e78b45fa6060820245711f3ea80a7d

Threat Level: Known bad

The file 2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop was found to be: Known bad.

Malicious Activity Summary

djvu discovery persistence ransomware

Djvu Ransomware

Detected Djvu ransomware

Djvu family

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

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-06 02:37

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

2024-09-06 02:37

Reported

2024-09-06 02:39

Platform

win7-20240708-en

Max time kernel

121s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\15958b58-0d0d-4ea0-af5d-325b514eb70f\\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_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\2024-09-06_69abef387f5e6f1374228d93e99b49b2_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\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2976 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 2976 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 2976 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 2976 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe C:\Windows\SysWOW64\icacls.exe
PID 2976 wrote to memory of 2768 N/A C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe
PID 2976 wrote to memory of 2768 N/A C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe
PID 2976 wrote to memory of 2768 N/A C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe
PID 2976 wrote to memory of 2768 N/A C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\15958b58-0d0d-4ea0-af5d-325b514eb70f" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_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 142.250.27.94:80 c.pki.goog tcp
US 172.67.139.220:443 api.2ip.ua tcp
US 8.8.8.8:53 dgos.top udp
US 8.8.8.8:53 astdg.top udp
US 8.8.8.8:53 crl.microsoft.com udp
GB 2.16.170.123:80 crl.microsoft.com tcp
US 8.8.8.8:53 www.microsoft.com udp
GB 184.25.193.234:80 www.microsoft.com tcp

Files

C:\Users\Admin\AppData\Local\15958b58-0d0d-4ea0-af5d-325b514eb70f\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe

MD5 69abef387f5e6f1374228d93e99b49b2
SHA1 a21dd5032832555af1db7500ce712b4df95b474e
SHA256 e3c13b76ee87295fba416b8c5348ecd434e78b45fa6060820245711f3ea80a7d
SHA512 f1bedf8f77e3b78c8cec2f2ca331587c89e54c7a68b5d6754002c66f349901cf22381228fc91beb19fa76a1c9bc02462fec40dbafde26e49d7da993d0e785fa2

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 b0179332f115737acd0951cf8f7ddc18
SHA1 c34c335f107eca99d860cb347f840bde812cf54b
SHA256 26ca96147dc169cee194fbe3461ed8f8c463deb07d2ebfd6bb37ebfd83bf3b6c
SHA512 7e76d48feb28bb8769be2e44c57b0f0bce74e9ff4da29e90d69d50777e8b1da8c9b3bced01eb71d14be0aa1113045207c03c2fa0c75a0a604d27bd5752717a53

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 c02c01de2a09d37e760f79522512795a
SHA1 65413265c8353a832ea5e456a5fb455e7114c528
SHA256 7e0d0b6284142b0631d1a42a4babb92cc44a40235c0281c025621df6f2faf332
SHA512 2e468c8e5ec3301450131614ae321b2f1d44ef1390fb87c69504fbfbd4e3d68958aca99a1ab7acf30fecb20b7a0ac3612b4cfe41ca0169a5c9982fa8a1f35e75

C:\Users\Admin\AppData\Local\Temp\CabCB4B.tmp

MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-06 02:37

Reported

2024-09-06 02:39

Platform

win10v2004-20240802-en

Max time kernel

95s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_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\2024-09-06_69abef387f5e6f1374228d93e99b49b2_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\\95508c80-844e-4456-a4ba-5761dc57cddb\\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_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\2024-09-06_69abef387f5e6f1374228d93e99b49b2_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\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\95508c80-844e-4456-a4ba-5761dc57cddb" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe

"C:\Users\Admin\AppData\Local\Temp\2024-09-06_69abef387f5e6f1374228d93e99b49b2_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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 c.pki.goog udp
NL 142.250.27.94:80 c.pki.goog tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
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 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 94.27.250.142.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 dgos.top udp
US 8.8.8.8:53 astdg.top udp
US 8.8.8.8:53 astdg.top udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 astdg.top udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 astdg.top udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\95508c80-844e-4456-a4ba-5761dc57cddb\2024-09-06_69abef387f5e6f1374228d93e99b49b2_stop.exe

MD5 69abef387f5e6f1374228d93e99b49b2
SHA1 a21dd5032832555af1db7500ce712b4df95b474e
SHA256 e3c13b76ee87295fba416b8c5348ecd434e78b45fa6060820245711f3ea80a7d
SHA512 f1bedf8f77e3b78c8cec2f2ca331587c89e54c7a68b5d6754002c66f349901cf22381228fc91beb19fa76a1c9bc02462fec40dbafde26e49d7da993d0e785fa2

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

MD5 d7b382ecd212154b6f7582b7b4a6ee52
SHA1 bf0886afe94019c5a8fb6368c91514177a7c8057
SHA256 8f8f124e782d37592bd3e879dd1190c6225f6cc81aff8044a5a16df62fa256b2
SHA512 5f353ccfc904316c070d361814404af50c4bf50071c840cb854e8c6c8910c761a0d6d9a9bdbd46de17abd3c06eab38194aee9ad8892540890b5efca3058e57a9

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 5b69e4e59f6fe3531a2528c87730c151
SHA1 b3d164ad6dd2a93d2dbd43ae5abe219118cb9ba2
SHA256 8134bd90ea635bb78614e4deec65b00b0a73c7461a6715e1ea48d28340f82b0e
SHA512 154469389ee6c35fb0366dae11dc157fbf3a0a694f4bb93f4a62a36d851f20451160c0a195128b60b62449d86ee60fe10a4a33bfbe3fd896ac05c1deeeb99305

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

MD5 7fb5fa1534dcf77f2125b2403b30a0ee
SHA1 365d96812a69ac0a4611ea4b70a3f306576cc3ea
SHA256 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
SHA512 a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e