Analysis
- max time kernel
297s - max time network
300s - platform
windows10-1703_x64 - resource
win10-20231215-en - resource tags
arch:x64arch:x86image:win10-20231215-enlocale:en-usos:windows10-1703-x64system - submitted
15/01/2024, 05:00
Static task
static1
Behavioral task
behavioral1
Sample
fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe
Resource
win10-20231215-en
General
- Target fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe
- Size 832KB
- Sample240115-fnhfpsagg4
- SHA256 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581
- MD5 7e0c3507ccd7fa02823e5158f26b9fea
- SHA1 308ce97fd7585c6623346a5c5623c5b441f79b62
- SHA512 80f90eb5451c0d79f13d7db44683bcb349b0daa604b8ee280833d84acd1f99e3b17dde3ff68617c48fe2032040bba2fefff0e3c69b540542fc9600da7d3f894c
- SSDEEP 12288:zBOvaA3lBcw8byxsNCESC58EFt7laSdyf6jiwGbF8lpKeAJMOib4MJ:QH36vAS53lh0yjitJ3eAJ/iMO
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Extracted
-
djvu
-
http://zexeq.com/test1/get.php
-
extension
.cdwe
-
offline_id
dSwr1XNNi5cIitB5eDPbMANcusB1dWGDB8ToUnt1
-
payload_url
http://brusuax.com/dl/build2.exe
http://zexeq.com/files/1/build3.exe
-
ransomnote
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Signatures
- Detect Vidar Stealer 5 IoCs
resource yara_rule behavioral2/memory/2988-39-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 behavioral2/memory/3856-42-0x00000000020F0000-0x000000000213B000-memory.dmp family_vidar_v6 behavioral2/memory/2988-45-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 behavioral2/memory/2988-44-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 behavioral2/memory/2988-52-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 - Detected Djvu ransomware 16 IoCs
resource yara_rule behavioral2/memory/3656-1-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3656-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3656-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2980-3-0x0000000002220000-0x000000000233B000-memory.dmp family_djvu behavioral2/memory/3656-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3656-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-46-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-57-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-56-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-54-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-58-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu - Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Downloads MZ/PE file
- Executes dropped EXE 2 IoCs
pid Process 3856 build2.exe 2988 build2.exe - Modifies file permissions 1 TTPs 1 IoCs
pid Process 4744 icacls.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-167039816-2868247564-2551780377-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\df201177-d6f1-403d-82c6-f32c0a856607\\fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe\" --AutoStart" fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe - 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 2 api.2ip.ua 9 api.2ip.ua - Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 2980 set thread context of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 3540 set thread context of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 3856 set thread context of 2988 3856 build2.exe 78 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
pid pid_target Process procid_target 3676 2988 WerFault.exe 78 - Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 3656 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 3656 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 2956 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 2956 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe - Suspicious use of WriteProcessMemory 39 IoCs
description pid Process procid_target PID 2980 wrote to memory of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 2980 wrote to memory of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 2980 wrote to memory of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 2980 wrote to memory of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 2980 wrote to memory of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 2980 wrote to memory of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 2980 wrote to memory of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 2980 wrote to memory of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 2980 wrote to memory of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 2980 wrote to memory of 3656 2980 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 16 PID 3656 wrote to memory of 4744 3656 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 37 PID 3656 wrote to memory of 4744 3656 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 37 PID 3656 wrote to memory of 4744 3656 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 37 PID 3656 wrote to memory of 3540 3656 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 36 PID 3656 wrote to memory of 3540 3656 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 36 PID 3656 wrote to memory of 3540 3656 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 36 PID 3540 wrote to memory of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 3540 wrote to memory of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 3540 wrote to memory of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 3540 wrote to memory of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 3540 wrote to memory of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 3540 wrote to memory of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 3540 wrote to memory of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 3540 wrote to memory of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 3540 wrote to memory of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 3540 wrote to memory of 2956 3540 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 35 PID 2956 wrote to memory of 3856 2956 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 79 PID 2956 wrote to memory of 3856 2956 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 79 PID 2956 wrote to memory of 3856 2956 fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe 79 PID 3856 wrote to memory of 2988 3856 build2.exe 78 PID 3856 wrote to memory of 2988 3856 build2.exe 78 PID 3856 wrote to memory of 2988 3856 build2.exe 78 PID 3856 wrote to memory of 2988 3856 build2.exe 78 PID 3856 wrote to memory of 2988 3856 build2.exe 78 PID 3856 wrote to memory of 2988 3856 build2.exe 78 PID 3856 wrote to memory of 2988 3856 build2.exe 78 PID 3856 wrote to memory of 2988 3856 build2.exe 78 PID 3856 wrote to memory of 2988 3856 build2.exe 78 PID 3856 wrote to memory of 2988 3856 build2.exe 78
Processes
-
C:\Users\Admin\AppData\Local\Temp\fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe"C:\Users\Admin\AppData\Local\Temp\fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2980 -
C:\Users\Admin\AppData\Local\Temp\fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe"C:\Users\Admin\AppData\Local\Temp\fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3656 -
C:\Users\Admin\AppData\Local\Temp\fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe"C:\Users\Admin\AppData\Local\Temp\fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3540
-
-
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\df201177-d6f1-403d-82c6-f32c0a856607" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4744
-
-
-
C:\Users\Admin\AppData\Local\Temp\fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe"C:\Users\Admin\AppData\Local\Temp\fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe" --Admin IsNotAutoStart IsNotTask1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2956 -
C:\Users\Admin\AppData\Local\27ab44ae-40f5-4f60-bf99-3ac58bc09a89\build2.exe"C:\Users\Admin\AppData\Local\27ab44ae-40f5-4f60-bf99-3ac58bc09a89\build2.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3856
-
-
C:\Users\Admin\AppData\Local\27ab44ae-40f5-4f60-bf99-3ac58bc09a89\build2.exe"C:\Users\Admin\AppData\Local\27ab44ae-40f5-4f60-bf99-3ac58bc09a89\build2.exe"1⤵
- Executes dropped EXE
PID:2988 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2988 -s 20402⤵
- Program crash
PID:3676
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
- Size 1KB
- SHA256 ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6
- MD5 b7470a9aa569b259d4c2bb3b80ae3aa3
- SHA1 093290296b7f1e402ef96e4b33a88f064aa401eb
- SHA512 4da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
- Size 724B
- SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
- MD5 8202a1cd02e7d69597995cabbe881a12
- SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
- SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
- Size 410B
- SHA256 4f260fc725d0e8dad1707964503ab9abb6c7875a3de8cffe90d572f772bf98c4
- MD5 dd10d0917a6de815007061ceab2f9858
- SHA1 45c2e20bf6253438ba7b8d6147aa73c35d62bf5a
- SHA512 f492933c212806a315af8712235ab901c491ddb505ef514d74159c7600eb17998df841a6b342d99b95ab8ec46ba64aac667455e48f8a377ac83c03a9ba39c356
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
- Size 392B
- SHA256 39720551284c236816ee58482891e249769855ea82ad359d40dff9179a165bb6
- MD5 f92c0b93181f7682f6d77f8af3c36499
- SHA1 75ab8169f3957329255f22303745e70a074d59e6
- SHA512 ebb03769bc7647289dad0ea98e9a0b487739c1f7c46fdd16fb2264c2057a4a63419a3a725b7d39ad7ea8835e52589cbd9b624b9d72cc917377ffac2407f7b1ea
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\27ab44ae-40f5-4f60-bf99-3ac58bc09a89\build2.exe
- Size 41KB
- SHA256 0ac095a964fa6d2e8c6cd15e014792cbb99df1995ce368b04d091a5fc9c6b6b8
- MD5 616621be84a8fd899b7faf2902ef6ebe
- SHA1 fa30297b1abc2800ab7475d68cfd418d5fb05b7a
- SHA512 18026b6cf831ceef7a04b2271a86439f8d1e919eadf65c014e292964df9fb3600e6e7960727ad4aa494726d16a37a0f4a3dd6ea92a81fd20417aa8eb63574b4d
- SSDEEP 768:kwuZ0KXZeVlMhadu3vR/eujtFx1GLaHhtBu+Ocr4UmrYXEXx:OlMdKp/eGxQLwtw+p4UhXGx
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\27ab44ae-40f5-4f60-bf99-3ac58bc09a89\build2.exe
- Size 33KB
- SHA256 13c60a54b695c2e13b21f95ea38198f8294b8c9561117bd0981b68bd6ca805c1
- MD5 29d75bd1a91b7cdeb73fc2f227d0a7c2
- SHA1 28cf770aead8400153666bf2a4537053eb187269
- SHA512 1bc4ea86d464f7befc672b8ca351ddedf9d405153b5d23e8531f0678c909f3b8f395322e227ca3ecda1e88cd2266c10131d82fd45784a9311dde859af01363c0
- SSDEEP 768:kwuZ0KXZeVlMhadu3vR/eujtFx1GLaHhtBu+Ocrs:OlMdKp/eGxQLwtw+ps
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\27ab44ae-40f5-4f60-bf99-3ac58bc09a89\build2.exe
- Size 27KB
- SHA256 6beccacecf877202e84b0565fccaf77bc6075b83fe009d9238aa59ac64f523c3
- MD5 1f79a2d92212e4afaf81ca196bacb291
- SHA1 61ae3c38481fb8fcadc3b4df63932aebe1cb4520
- SHA512 b37f070c10e6eb07111182b2168f0e41e7c17bb782fd1105992ab7acf1dfbadc4208fe4d351fa446fd46bd231d47457d26855f6d6bb8ca5ec5343b399a4b7ecc
- SSDEEP 768:kwuZ0KXZeVlMhadu3vR/eujtFx1GLaHhtBu+8:OlMdKp/eGxQLwtw+8
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\df201177-d6f1-403d-82c6-f32c0a856607\fadf10b3ec4fd1bdc37866d4c5d2a9816d2a7541bc213ed0a123cb427ddbd581.exe
- Size 115KB
- SHA256 08f08c53c8388a075cb7ba93f5336d5827b525da351c24a4706d9aeedf72dd71
- MD5 771d9306b4cfbbca7c47f52ab6c40217
- SHA1 5fbc05a8d829f061775e041a41b032e9e8cd2dce
- SHA512 5b211651d74f5417d702072af374295dcd2a0f1fde0f70c1cf25282b74c639e3d5ab5a9f7bf89e8742053bc947f1a3853fbf2352356c3729fc0448fdc18b5a60
- SSDEEP 1536:zBjWl9XCEQ4wBnLA+FfW3+GdvLrpmAj2iKIl50bG2pp/wvi8Jioen6sH1KaKabF:zBOS4qnLri+EvLrT3llJiBRH1KaF
- MD5 SHA1 SHA512 SSDEEP