djvu | 6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5

General

Target

6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
Size

695KB
MD5

55003980eb9dd9febae3b655f9ecfab2
SHA1

0c3c46840f5cc4e8267ee121797a56eedefd12eb
SHA256

6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5
SHA512

a89bb0fe852590f1600786799e55fd2ecaa47ad62d40e569ff23f5b1c185edab58acfafd9b0dff319d2cb2e88d9901fc86a039f36fd3f028565750cabc1cbd5a
SSDEEP

12288:38ffVfT7CXB5JOJRH0LflFV0jXtYLYL7fhImKBZmjSLiA3DtrFFk3I:381ve5Je0zlFctZ/fVKBIjDATRk3I

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes

extension
.held
offline_id
vyhLHcV0DMKjS0CgDoJGF0yJ299laBK7lZQM9Tt1
payload_url
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. 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: 0879held

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

resource	yara_rule
behavioral2/memory/3204-1-0x0000000002240000-0x000000000235B000-memory.dmp	family_djvu
behavioral2/memory/1220-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/796-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1152	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-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bfb5ec9d-7889-4d6d-ba37-035d65be6dca\\6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe\" --AutoStart"	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.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
5	api.2ip.ua
6	api.2ip.ua
20	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3204 set thread context of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 4376 set thread context of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86

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	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1220	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
1220	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
796	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
796	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3204 wrote to memory of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 3204 wrote to memory of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 3204 wrote to memory of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 3204 wrote to memory of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 3204 wrote to memory of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 3204 wrote to memory of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 3204 wrote to memory of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 3204 wrote to memory of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 3204 wrote to memory of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 3204 wrote to memory of 1220	3204	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	82
PID 1220 wrote to memory of 1152	1220	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	83
PID 1220 wrote to memory of 1152	1220	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	83
PID 1220 wrote to memory of 1152	1220	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	83
PID 1220 wrote to memory of 4376	1220	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	84
PID 1220 wrote to memory of 4376	1220	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	84
PID 1220 wrote to memory of 4376	1220	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	84
PID 4376 wrote to memory of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86
PID 4376 wrote to memory of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86
PID 4376 wrote to memory of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86
PID 4376 wrote to memory of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86
PID 4376 wrote to memory of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86
PID 4376 wrote to memory of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86
PID 4376 wrote to memory of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86
PID 4376 wrote to memory of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86
PID 4376 wrote to memory of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86
PID 4376 wrote to memory of 796	4376	6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe	86

C:\Users\Admin\AppData\Local\Temp\6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
"C:\Users\Admin\AppData\Local\Temp\6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3204
- C:\Users\Admin\AppData\Local\Temp\6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
  "C:\Users\Admin\AppData\Local\Temp\6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.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:1220
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\bfb5ec9d-7889-4d6d-ba37-035d65be6dca" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:1152
- - C:\Users\Admin\AppData\Local\Temp\6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
    "C:\Users\Admin\AppData\Local\Temp\6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4376
  - - C:\Users\Admin\AppData\Local\Temp\6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe
      "C:\Users\Admin\AppData\Local\Temp\6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:796

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
67e486b2f148a3fca863728242b6273e

SHA1
452a84c183d7ea5b7c015b597e94af8eef66d44a

SHA256
facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb

SHA512
d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
1b69a03e50df5f22eb4709601b108767

SHA1
a1f7d72945c48de8a223bea54e0af5b1af3f7add

SHA256
4ccba393d9037e7aadebb71b28d90f04345c01cdf127f91eabb7c99c3f60c8be

SHA512
05c44bfb3c3b33c0e8885cc28698adaf26c0890a52c7df0dbd28b9b1e9ac2cb74dba86a1ce5a739777b97f933cead67648affe0fc4db7b228f2b15eb2d9ca489

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
90e7c17acc79d234eef963d758902228

SHA1
e81beca5be841147fe78aeca6ca76320b2511903

SHA256
04715af29df0434e3c5f4c93e34fdd08153d1b4c91de3410ef68afa6ea6ef575

SHA512
e6994eb5637ff0dddc345c2de6110e9698e9c5fc3e14a90d7f33a6994b519e323b73fe76d0180051338a31b9497645c36d910c98c7d0b9f1eec7e7a01018441e

Download Submit
C:\Users\Admin\AppData\Local\bfb5ec9d-7889-4d6d-ba37-035d65be6dca\6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5.exe

Filesize
695KB

MD5
55003980eb9dd9febae3b655f9ecfab2

SHA1
0c3c46840f5cc4e8267ee121797a56eedefd12eb

SHA256
6f017ce5d640d80fd0d66e73ebcfac88f60cb463813be6a96417040598f731a5

SHA512
a89bb0fe852590f1600786799e55fd2ecaa47ad62d40e569ff23f5b1c185edab58acfafd9b0dff319d2cb2e88d9901fc86a039f36fd3f028565750cabc1cbd5a

Download Submit
memory/796-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-42-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/796-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1220-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1220-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1220-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1220-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1220-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3204-0-0x0000000000610000-0x00000000006A2000-memory.dmp

Filesize
584KB

Download
memory/3204-1-0x0000000002240000-0x000000000235B000-memory.dmp

Filesize
1.1MB

Download
memory/3204-4-0x0000000000610000-0x00000000006A2000-memory.dmp

Filesize
584KB

Download
memory/4376-24-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download
memory/4376-20-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads