Analysis
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max time kernel
118s -
max time network
148s -
platform
windows10-1703_x64 -
resource
win10-20220812-en -
resource tags
arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system -
submitted
11/10/2022, 10:00
Static task
static1
Behavioral task
behavioral1
Sample
671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
Resource
win10-20220812-en
General
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Target
671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
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Size
729KB
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MD5
335d895837cd0451a60057a9b84c81bc
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SHA1
a3846bce811b7150c30719f7599e700d0a154816
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SHA256
671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586
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SHA512
c79e7efc35ce76e9c804b78fb5ba8e4137d521d43d43d02e18ec3d9cbb9c73a135cd9f40f88788fe82d5bd997de73a4d8db5ded6953c92d1b002cc477b8cba14
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SSDEEP
12288:lR06SIV8mng9ldS/TXgQmLFWAT3i8sDW/9QTHrZ7P8lA4lB3cejjVQ2Kt:lRLpg97S/TXLmTbi8sDy0rZ7PrejjVJi
Malware Config
Extracted
djvu
http://winnlinne.com/lancer/get.php
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extension
.towz
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offline_id
SSHsHMHGmSIhrz50VnIxLJJX15osxEQY6iXedXt1
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payload_url
http://rgyui.top/dl/build2.exe
http://winnlinne.com/files/1/build3.exe
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ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-Kbx8mJatqN Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0577Jhyjd
Extracted
vidar
54.9
517
https://t.me/larsenup
https://ioc.exchange/@zebra54
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profile_id
517
Signatures
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Detected Djvu ransomware 9 IoCs
resource yara_rule behavioral1/memory/4000-149-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/4324-150-0x00000000024A0000-0x00000000025BB000-memory.dmp family_djvu behavioral1/memory/4000-148-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4000-156-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4000-205-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4000-250-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3060-277-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/3060-350-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3060-461-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Executes dropped EXE 2 IoCs
pid Process 4108 build2.exe 1588 build2.exe -
Loads dropped DLL 2 IoCs
pid Process 1588 build2.exe 1588 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 1196 icacls.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3844063266-715245855-4050956231-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e03f1a30-25fd-41f2-a82e-ae4fad38836e\\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe\" --AutoStart" 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 1 api.2ip.ua 3 api.2ip.ua 10 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 4324 set thread context of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4568 set thread context of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 4108 set thread context of 1588 4108 build2.exe 72 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Program crash 1 IoCs
pid pid_target Process procid_target 2160 1588 WerFault.exe 72 -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4000 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 4000 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 3060 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 3060 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 1588 build2.exe 1588 build2.exe -
Suspicious use of WriteProcessMemory 38 IoCs
description pid Process procid_target PID 4324 wrote to memory of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4324 wrote to memory of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4324 wrote to memory of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4324 wrote to memory of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4324 wrote to memory of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4324 wrote to memory of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4324 wrote to memory of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4324 wrote to memory of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4324 wrote to memory of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4324 wrote to memory of 4000 4324 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 66 PID 4000 wrote to memory of 1196 4000 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 67 PID 4000 wrote to memory of 1196 4000 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 67 PID 4000 wrote to memory of 1196 4000 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 67 PID 4000 wrote to memory of 4568 4000 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 68 PID 4000 wrote to memory of 4568 4000 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 68 PID 4000 wrote to memory of 4568 4000 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 68 PID 4568 wrote to memory of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 4568 wrote to memory of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 4568 wrote to memory of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 4568 wrote to memory of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 4568 wrote to memory of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 4568 wrote to memory of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 4568 wrote to memory of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 4568 wrote to memory of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 4568 wrote to memory of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 4568 wrote to memory of 3060 4568 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 70 PID 3060 wrote to memory of 4108 3060 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 71 PID 3060 wrote to memory of 4108 3060 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 71 PID 3060 wrote to memory of 4108 3060 671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe 71 PID 4108 wrote to memory of 1588 4108 build2.exe 72 PID 4108 wrote to memory of 1588 4108 build2.exe 72 PID 4108 wrote to memory of 1588 4108 build2.exe 72 PID 4108 wrote to memory of 1588 4108 build2.exe 72 PID 4108 wrote to memory of 1588 4108 build2.exe 72 PID 4108 wrote to memory of 1588 4108 build2.exe 72 PID 4108 wrote to memory of 1588 4108 build2.exe 72 PID 4108 wrote to memory of 1588 4108 build2.exe 72 PID 4108 wrote to memory of 1588 4108 build2.exe 72
Processes
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C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe"C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4324 -
C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe"C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4000 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\e03f1a30-25fd-41f2-a82e-ae4fad38836e" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1196
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C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe"C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4568 -
C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe"C:\Users\Admin\AppData\Local\Temp\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3060 -
C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe"C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4108 -
C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe"C:\Users\Admin\AppData\Local\32c45d7e-8fd4-48d6-a822-6e1223b6093b\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1588 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1588 -s 16767⤵
- Program crash
PID:2160
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD56f59ed058aa06aaf5ec6213b955aabd4
SHA1baf7b828a563b8fb6111e4ce35e0055575ad80b4
SHA2562d82e2629fa2e08f28b43b15da43dff56c7f4b23b39d66109c7c61998e35b4d5
SHA5126b0f041dafb98b9eaf70ac0d20a98c56e1c42231c4a4ae6e11582b20d20bf8f96dfd7747739a10d77368994441adb0e181b356f8569697b1f22ab4fe931170ce
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD50698dbc93ba7b6bef73ba316695f8317
SHA1a444078ff1eb7c88f52cb4e324365926b491ed47
SHA256263292040d77903899257c1d21201dc64d6f8d6b5a1d945cd5b28d0124d7906c
SHA512ebacaa7009aebb88199cd70fd0bb3afe69ed300318cb633edd1c0404e42aef829617f589bcbad6cb7ab4bd0a8ae87f7df1435c786184ecc5de61c8fc6950a900
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD59d0a03ed6d65775047fa11ea4d05d8c5
SHA11235586fff9749afd94c227a8a4fd9fce5595482
SHA2567e745bc5802049c8c589ecf726ef79f147b8a802e3f04563c047f4b7f27dce3b
SHA512fed832aefad68018493aa66dba1c89d4217199a15724479bb98636971d6f240585ee64f2e3d1d11892a1bf792f775aaed02050a4842e509aceb9f6c4dbad4b51
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD5f528535a07da2196f0da7122161aa0b2
SHA1d309aad6e6f9ec290db7afacd47c4c87b7059886
SHA256f973b8d47fccedc6a527ed42be3534aa10488eea873d3257a0ebea4b34bdb668
SHA512dda17f3fe421556a923e216f3ebc0a138394cf05031712094bb56fa623afa330d946a7b5569670cce48eb34f973f0397e09d51ba63d94faf4e2624179caa1149
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Filesize
255KB
MD59c3d4324a153c6438f48083bc333a962
SHA1033e80e2008f4f62d2716ce0473bb0d763d52277
SHA2565ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98
SHA5128cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd
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Filesize
255KB
MD59c3d4324a153c6438f48083bc333a962
SHA1033e80e2008f4f62d2716ce0473bb0d763d52277
SHA2565ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98
SHA5128cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd
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Filesize
255KB
MD59c3d4324a153c6438f48083bc333a962
SHA1033e80e2008f4f62d2716ce0473bb0d763d52277
SHA2565ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98
SHA5128cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd
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C:\Users\Admin\AppData\Local\e03f1a30-25fd-41f2-a82e-ae4fad38836e\671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586.exe
Filesize729KB
MD5335d895837cd0451a60057a9b84c81bc
SHA1a3846bce811b7150c30719f7599e700d0a154816
SHA256671ecb31de42082130537401d27bd404a50c55aa4cfd2e082560c36168715586
SHA512c79e7efc35ce76e9c804b78fb5ba8e4137d521d43d43d02e18ec3d9cbb9c73a135cd9f40f88788fe82d5bd997de73a4d8db5ded6953c92d1b002cc477b8cba14
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Filesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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Filesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571