djvu | 954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889

Analysis

max time kernel
145s
max time network
126s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
27/04/2024, 08:35

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General

Target
954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe
Size 749KB
Sample240427-khf3xaeh86
SHA256 954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889
MD5 2473e4881882b115f4af03a4e06768c5
SHA1 d4624ce03223ec6ec967f691e63d7b3c6cf67db6
SHA512 ce0d1f365e56608f199ac96cae81a6f9f71f189acb257a6a3a07545a1ddc4d84ff0d7ebbb8ced3c7fe52b2e06c30f143d6d093c8a4b2fec34a5533ab86e9e328
SSDEEP 12288:WB9m/19iyezJJLhcD4SzYNkgnmNez53H9dADu819vYdDxvZdrNaMUVn0kF:WHmt96JlhY4Aa53Hy19AdDxTrN5Uz
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test2/get.php

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/380-2-0x0000000003200000-0x000000000331B000-memory.dmp	family_djvu
behavioral2/memory/1916-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1916-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1916-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1916-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1916-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2088	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\40453cae-983c-4558-a6d1-073980abfa81\\954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe\" --AutoStart"	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.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
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 380 set thread context of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 4836 set thread context of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1916	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe
1916	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe
1992	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe
1992	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 380 wrote to memory of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 380 wrote to memory of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 380 wrote to memory of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 380 wrote to memory of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 380 wrote to memory of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 380 wrote to memory of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 380 wrote to memory of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 380 wrote to memory of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 380 wrote to memory of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 380 wrote to memory of 1916	380	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	82
PID 1916 wrote to memory of 2088	1916	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	83
PID 1916 wrote to memory of 2088	1916	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	83
PID 1916 wrote to memory of 2088	1916	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	83
PID 1916 wrote to memory of 4836	1916	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	84
PID 1916 wrote to memory of 4836	1916	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	84
PID 1916 wrote to memory of 4836	1916	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	84
PID 4836 wrote to memory of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87
PID 4836 wrote to memory of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87
PID 4836 wrote to memory of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87
PID 4836 wrote to memory of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87
PID 4836 wrote to memory of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87
PID 4836 wrote to memory of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87
PID 4836 wrote to memory of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87
PID 4836 wrote to memory of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87
PID 4836 wrote to memory of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87
PID 4836 wrote to memory of 1992	4836	954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe	87

C:\Users\Admin\AppData\Local\Temp\954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe
"C:\Users\Admin\AppData\Local\Temp\954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:380
- C:\Users\Admin\AppData\Local\Temp\954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe
  "C:\Users\Admin\AppData\Local\Temp\954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1916
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\40453cae-983c-4558-a6d1-073980abfa81" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2088
- - C:\Users\Admin\AppData\Local\Temp\954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe
    "C:\Users\Admin\AppData\Local\Temp\954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4836
  - - C:\Users\Admin\AppData\Local\Temp\954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe
      "C:\Users\Admin\AppData\Local\Temp\954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1992

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 fc283d50ca01bbec2d1061d644d41108aa1d2e19d1b6858ccada4f1329710e51
MD5 c35390cd7305291de0cfa7de08b0da99
SHA1 ccb6a65f324fbdadd872ca23d256ece85cce447d
SHA512 32c7b4b6250c6eb0d07859f195364f08655fb3567ca023d3c85e32f5d141adc4966f30fc11ee1607d0246ba91117e88917b58d9978e4b2edbfaffb3dc6fd7d59
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 65411d2669b07272e70aba0a12d2641bfe57b34a57ff58e83bcec1eed8528155
MD5 8be8613e09ebfe2cb9bde9d7d0e74588
SHA1 b4d479526b792eb0532df5d0cdc06d03f9a45921
SHA512 9d380e6bd999f49fe80fb9e0db50f4d1ca64687d2458dec0bd23d396f7f0ab0002439910db983de88354b3dc7fe322bb4bfb0c2f8031001be3104b6362e3c9c3
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 1c4371e0d089806a89970f13f8c4648c476fba9dca2e5595ada8218be27475b9
MD5 b6f8002f308ab813b4d964662c47e44c
SHA1 7bca6122d18eda61dcb10bddc056f6bcc41dc497
SHA512 91bda9691bcc794370044fc4084736dceb7643c2d7ccd51ae53321e9789df002452f1dc5b8c963f4017df5813986f995f6bc47fab9ec22c4b46f80f1a0bea248
MD5 SHA1 SHA512

Submit Download

954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe

Path C:\Users\Admin\AppData\Local\40453cae-983c-4558-a6d1-073980abfa81\954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889.exe
Size 749KB
SHA256 954bf47b858fbcbe354fea135f9d104e089edbc3c9c750588fde8a1e55076889
MD5 2473e4881882b115f4af03a4e06768c5
SHA1 d4624ce03223ec6ec967f691e63d7b3c6cf67db6
SHA512 ce0d1f365e56608f199ac96cae81a6f9f71f189acb257a6a3a07545a1ddc4d84ff0d7ebbb8ced3c7fe52b2e06c30f143d6d093c8a4b2fec34a5533ab86e9e328
SSDEEP 12288:WB9m/19iyezJJLhcD4SzYNkgnmNez53H9dADu819vYdDxvZdrNaMUVn0kF:WHmt96JlhY4Aa53Hy19AdDxTrN5Uz
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/380-2-0x0000000003200000-0x000000000331B000-memory.dmp

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memory/380-1-0x0000000003160000-0x00000000031F3000-memory.dmp

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memory/1916-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1916-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1916-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1916-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1916-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-35-0x0000000000400000-0x0000000000537000-memory.dmp

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