Malware Analysis Report

2024-10-23 16:21

Sample ID 240823-n7gbraseqe
Target bba54c282b52450d29c0372a0d0801ea_JaffaCakes118
SHA256 3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9
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

3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9

Threat Level: Known bad

The file bba54c282b52450d29c0372a0d0801ea_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

djvu discovery persistence ransomware

Detected Djvu ransomware

Djvu Ransomware

Checks computer location settings

Modifies file permissions

Looks up external IP address via web service

Adds Run key to start application

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-23 12:02

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-23 12:02

Reported

2024-08-23 12:04

Platform

win7-20240704-en

Max time kernel

142s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe"

Signatures

Detected Djvu ransomware

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
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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-1-5-21-3294248377-1418901787-4083263181-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\71dbaaaf-2f53-4d4e-a7be-cf69453c9204\\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.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\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.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\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2924 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe C:\Windows\SysWOW64\icacls.exe
PID 2924 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe C:\Windows\SysWOW64\icacls.exe
PID 2924 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe C:\Windows\SysWOW64\icacls.exe
PID 2924 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe C:\Windows\SysWOW64\icacls.exe
PID 2924 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe
PID 2924 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe
PID 2924 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe
PID 2924 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe

Processes

C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\71dbaaaf-2f53-4d4e-a7be-cf69453c9204" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.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 c.pki.goog udp
FR 216.58.214.163:80 c.pki.goog tcp
US 104.21.65.24:443 api.2ip.ua tcp
US 8.8.8.8:53 ring1.ug udp
US 8.8.8.8:53 crl.microsoft.com udp
GB 92.123.143.234:80 crl.microsoft.com tcp

Files

memory/2924-0-0x0000000009380000-0x0000000009442000-memory.dmp

memory/2924-1-0x0000000009380000-0x0000000009442000-memory.dmp

memory/2924-2-0x0000000009450000-0x000000000956A000-memory.dmp

memory/2924-3-0x0000000000400000-0x0000000000537000-memory.dmp

C:\Users\Admin\AppData\Local\71dbaaaf-2f53-4d4e-a7be-cf69453c9204\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe

MD5 bba54c282b52450d29c0372a0d0801ea
SHA1 670981a5ef11461aa1891ab300c41f7e83c4e64d
SHA256 3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9
SHA512 056cba65bbaf1aaa7f9a3d548dd6b958e562cd4e3be5e91b1998c3d998f5197a241b7bf8da8470743962d902153b6cfbf2239e18b7bacdd6f30ecae248e71c5d

memory/2924-24-0x0000000009450000-0x000000000956A000-memory.dmp

memory/2924-26-0x0000000000400000-0x0000000000537000-memory.dmp

memory/2924-23-0x0000000000400000-0x0000000001400000-memory.dmp

memory/2924-25-0x0000000009380000-0x0000000009442000-memory.dmp

memory/2592-27-0x0000000009420000-0x00000000094E2000-memory.dmp

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 fbf55cfe950a61fa6256bc87257913f4
SHA1 5e81e1e1a1278e86373aaa832534d915e9d37740
SHA256 79a8835d7671c9fd847b6aae494389276574bdbc2aa09a6eefb5a964c780f4c5
SHA512 f2db21b07217723e58d26571fab91efa9c5fbb6979a02fdfe251bc3ca1c167f5411c3aa5197a4036cc1694ed352d19cc7f9a4e234d45571396853d6cd7bafee0

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 64830b3be24acb08e072c46eb465c7c0
SHA1 a09b2f2be98a0a402fb81cc501edd745c856f224
SHA256 d112dda1ff50b11a20181f7eb51a69d56fa4e65fef4d22ad0adcfed272f5c89e
SHA512 c5f1c897e120583d2ad31c0536ae8621ff43a839d5299c704f225689bc69fb2b7d6770cc7af27671e48147c2e31dbecaa169b8e48499173e23fb216c3c655618

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

MD5 5556c860daf11cfdebc3519c96922707
SHA1 dcea9d034c8612874e1caf96dcb91201e5e03284
SHA256 f89d66f53d833b5799168ea67684b147a886893b9995e401c8e4da7c55176e33
SHA512 9cf6c888b1d0a8fd455e935c1119c9307d642a88353d2ef3c62908aede3222b909971359c54da53f866b40ae71b429fd2b1881e89ef8526c516bc485730bc1c4

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

MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

memory/2592-42-0x0000000000400000-0x0000000001400000-memory.dmp

memory/2592-43-0x0000000000400000-0x0000000001400000-memory.dmp

memory/2592-46-0x0000000000400000-0x0000000001400000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-23 12:02

Reported

2024-08-23 12:04

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe"

Signatures

Detected Djvu ransomware

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
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Djvu Ransomware

ransomware djvu

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.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-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0cf2e5d2-89bf-4461-a170-643108ee2737\\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe\" --AutoStart" C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.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\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.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\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe"

C:\Windows\SysWOW64\icacls.exe

icacls "C:\Users\Admin\AppData\Local\0cf2e5d2-89bf-4461-a170-643108ee2737" /deny *S-1-1-0:(OI)(CI)(DE,DC)

C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2420 -ip 2420

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2420 -s 2132

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 45.19.74.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
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 c.pki.goog udp
FR 216.58.214.163:80 c.pki.goog tcp
US 8.8.8.8:53 24.65.21.104.in-addr.arpa udp
US 8.8.8.8:53 163.214.58.216.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 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 104.21.65.24:443 api.2ip.ua tcp
US 8.8.8.8:53 ring1.ug udp
US 8.8.8.8:53 ring1.ug udp
US 8.8.8.8:53 ring1.ug udp
US 8.8.8.8:53 ring1.ug udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp

Files

memory/2420-1-0x00000000099F0000-0x0000000009ABB000-memory.dmp

memory/2420-2-0x0000000009AC0000-0x0000000009BDA000-memory.dmp

memory/2420-3-0x0000000000400000-0x0000000000537000-memory.dmp

C:\Users\Admin\AppData\Local\0cf2e5d2-89bf-4461-a170-643108ee2737\bba54c282b52450d29c0372a0d0801ea_JaffaCakes118.exe

MD5 bba54c282b52450d29c0372a0d0801ea
SHA1 670981a5ef11461aa1891ab300c41f7e83c4e64d
SHA256 3d3df3e7eb70a5b2ec5d8484b65aa13b0bfa15161ad29b1435f17fc7c80cdef9
SHA512 056cba65bbaf1aaa7f9a3d548dd6b958e562cd4e3be5e91b1998c3d998f5197a241b7bf8da8470743962d902153b6cfbf2239e18b7bacdd6f30ecae248e71c5d

memory/2420-15-0x0000000009AC0000-0x0000000009BDA000-memory.dmp

memory/2420-14-0x0000000000400000-0x0000000001400000-memory.dmp

memory/2420-16-0x0000000000400000-0x0000000000537000-memory.dmp

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 d8369eee79b6f0d2da81ed774265e022
SHA1 54d1c66b06324f6efb51947a6b8f641c399aa17a
SHA256 d39686c686fe1e9fee515b6807c350b95f2668a2e546b0a3cd0ba594861544fc
SHA512 bb555795aa7ff02861cb7f53d604f3504c2444305a6d767265455b6b269468d0a220031d9ba9d0a701e65c566eac8d14592653f6e8043748c43669a5d826740e

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 484b64931e32e0f4d2690d9960d79f7b
SHA1 a3a14d3a4ec80140111719766d4bc9fbd0db8666
SHA256 3b6267b9840712cc1be15857b8da8383cadda0cc8dd5e541cd4390fc2e81639a
SHA512 8edf9684f81c422746b6f70c94c9a1cdcee4220e58d4cfb3bd667e0968addab5bc92f1b38b3f648da0c130c5b51c32c70f3d7f563ebdddd5bc39e783a56dc4ce

memory/2524-24-0x0000000000400000-0x0000000001400000-memory.dmp

memory/2524-27-0x0000000000400000-0x0000000001400000-memory.dmp

memory/2524-29-0x0000000000400000-0x0000000001400000-memory.dmp