djvu | c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781

Analysis

max time kernel
141s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17/10/2024, 21:46

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General

Target
c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
Size 757KB
Sample241017-1mphva1eqq
SHA256 c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781
MD5 bd4d06f1e0139f61fed18f524e00ff59
SHA1 8a8cf66f6ecd4b4591ab7839e7865c55d287e760
SHA512 ca3f80d45ed1f52f17f7b02827ff5e1a70d4cbe25274864fc5aa2445d0e77654feddaad8935e356eea5e043e2d71ec513daf3466df8030eac7c69aefc73f9fbb
SSDEEP 12288:QLMAH6P93Sr/C3XgEs4vkTZNt4Qtz+8rEL61rR9N0xUYsHF:PTPwr/CAbx/QL61tJYsl
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

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

http://sajdfue.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 16 IoCs

resource	yara_rule
behavioral2/memory/708-2-0x0000000005D70000-0x0000000005E8B000-memory.dmp	family_djvu
behavioral2/memory/1608-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1608-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1608-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1608-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1608-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5044-43-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3528	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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\46a5c5d8-e8b6-4799-9afd-51581e3e64d6\\c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe\" --AutoStart"	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.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
3	api.2ip.ua
4	api.2ip.ua
11	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 708 set thread context of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 3036 set thread context of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1608	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
1608	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
5044	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
5044	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 708 wrote to memory of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 708 wrote to memory of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 708 wrote to memory of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 708 wrote to memory of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 708 wrote to memory of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 708 wrote to memory of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 708 wrote to memory of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 708 wrote to memory of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 708 wrote to memory of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 708 wrote to memory of 1608	708	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	84
PID 1608 wrote to memory of 3528	1608	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	87
PID 1608 wrote to memory of 3528	1608	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	87
PID 1608 wrote to memory of 3528	1608	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	87
PID 1608 wrote to memory of 3036	1608	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	89
PID 1608 wrote to memory of 3036	1608	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	89
PID 1608 wrote to memory of 3036	1608	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	89
PID 3036 wrote to memory of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91
PID 3036 wrote to memory of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91
PID 3036 wrote to memory of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91
PID 3036 wrote to memory of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91
PID 3036 wrote to memory of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91
PID 3036 wrote to memory of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91
PID 3036 wrote to memory of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91
PID 3036 wrote to memory of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91
PID 3036 wrote to memory of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91
PID 3036 wrote to memory of 5044	3036	c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe	91

C:\Users\Admin\AppData\Local\Temp\c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
"C:\Users\Admin\AppData\Local\Temp\c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:708
- C:\Users\Admin\AppData\Local\Temp\c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
  "C:\Users\Admin\AppData\Local\Temp\c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1608
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\46a5c5d8-e8b6-4799-9afd-51581e3e64d6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3528
- - C:\Users\Admin\AppData\Local\Temp\c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
    "C:\Users\Admin\AppData\Local\Temp\c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3036
  - - C:\Users\Admin\AppData\Local\Temp\c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
      "C:\Users\Admin\AppData\Local\Temp\c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:5044

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 1KB
SHA256 facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb
MD5 67e486b2f148a3fca863728242b6273e
SHA1 452a84c183d7ea5b7c015b597e94af8eef66d44a
SHA512 d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e
MD5 SHA1 SHA512

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B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
Size 436B
SHA256 f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
MD5 971c514f84bba0785f80aa1c23edfd79
SHA1 732acea710a87530c6b08ecdf32a110d254a54c8
SHA512 43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58
MD5 SHA1 SHA512

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8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 174B
SHA256 5376a6c1a68274d093cecf185c843140358d540865d5d3413e122de405a50ab1
MD5 276e133382ae0ecb6419d6d3b0d16f85
SHA1 e4b893a1c8a809a169536bb1a110f7f60779445f
SHA512 2c12884201935995962a707c87305a048956f2a0c9df79d189654843c2906565403d55375f1ab4549b4af9bf387762aa7d943bc439bd185354707cc017aec712
MD5 SHA1 SHA512

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B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Size 170B
SHA256 51e5e691b0f2d06afb6c5cb01f82217b11d5225802e9ef2f56c4163215fa4c6e
MD5 1b943ddcf7251fca3cbe59361dd99934
SHA1 4bdb4c83e126a760dde59cff40c47716f13233cc
SHA512 dfacadac5c4a21c4202ffffe07a943704216c645b99ba1c291c6bac59f648e7ae16fe17914ebfa487b238cad49f21663861f6e1f0b7c21b5e9655733b242f700
MD5 SHA1 SHA512

Submit Download

c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe

Path C:\Users\Admin\AppData\Local\46a5c5d8-e8b6-4799-9afd-51581e3e64d6\c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781.exe
Size 757KB
SHA256 c4b93b302d810c73be3886dc8aa03c230adb8a5df3611bedfa92995412fe2781
MD5 bd4d06f1e0139f61fed18f524e00ff59
SHA1 8a8cf66f6ecd4b4591ab7839e7865c55d287e760
SHA512 ca3f80d45ed1f52f17f7b02827ff5e1a70d4cbe25274864fc5aa2445d0e77654feddaad8935e356eea5e043e2d71ec513daf3466df8030eac7c69aefc73f9fbb
SSDEEP 12288:QLMAH6P93Sr/C3XgEs4vkTZNt4Qtz+8rEL61rR9N0xUYsHF:PTPwr/CAbx/QL61tJYsl
MD5 SHA1 SHA512 SSDEEP

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memory/708-2-0x0000000005D70000-0x0000000005E8B000-memory.dmp

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memory/708-1-0x0000000005CC0000-0x0000000005D5F000-memory.dmp

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memory/1608-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1608-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1608-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1608-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1608-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-42-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-43-0x0000000000400000-0x0000000000537000-memory.dmp

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