djvu | 8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691

Analysis

max time kernel
115s
max time network
36s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26-12-2024 21:56

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General

Target

8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
Size

695KB
MD5

999d1f23a3d2e1ba0668b7ed3317af30
SHA1

cc783775f56876c2b1af82f942fc3f3f4ed6ab37
SHA256

8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691
SHA512

53b9de37d9083e21ab5fb2ba5b8e57e1a62c7a31863507d356cd9ef98163279b26939562fb338b5709c44e1f3db1d5dcf66af8656b8b5b73db7be2d310a64cf9
SSDEEP

12288:38ffVfT7CXB5JOJRH0LflFV0jXtYLYL7fhImKBZmjSLiA3DtrFFk3:381ve5Je0zlFctZ/fVKBIjDATRk3

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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 15 IoCs

resource	yara_rule
behavioral1/memory/2112-1-0x0000000001D90000-0x0000000001EAB000-memory.dmp	family_djvu
behavioral1/memory/1948-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1948-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1948-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1948-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2720	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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2f45cc07-7e34-4f13-97bc-8c583e8c2d0d\\8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe\" --AutoStart"	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.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
9	api.2ip.ua
4	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2112 set thread context of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2768 set thread context of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34

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	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1948	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
1948	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
2612	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
2612	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 2112 wrote to memory of 1948	2112	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	30
PID 1948 wrote to memory of 2720	1948	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	32
PID 1948 wrote to memory of 2720	1948	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	32
PID 1948 wrote to memory of 2720	1948	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	32
PID 1948 wrote to memory of 2720	1948	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	32
PID 1948 wrote to memory of 2768	1948	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	33
PID 1948 wrote to memory of 2768	1948	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	33
PID 1948 wrote to memory of 2768	1948	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	33
PID 1948 wrote to memory of 2768	1948	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	33
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34
PID 2768 wrote to memory of 2612	2768	8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe	34

C:\Users\Admin\AppData\Local\Temp\8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
"C:\Users\Admin\AppData\Local\Temp\8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Users\Admin\AppData\Local\Temp\8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
  "C:\Users\Admin\AppData\Local\Temp\8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1948
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\2f45cc07-7e34-4f13-97bc-8c583e8c2d0d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2720
- - C:\Users\Admin\AppData\Local\Temp\8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
    "C:\Users\Admin\AppData\Local\Temp\8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2768
  - - C:\Users\Admin\AppData\Local\Temp\8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe
      "C:\Users\Admin\AppData\Local\Temp\8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2612

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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
07b5d8d2f59d291989a2a3fe9e5cd3ad

SHA1
4e4ca3350b5b4c2479e67efdf71994b74cf3c7a3

SHA256
b34e4aa51451989d3cd931732114904b5ea3e74b16c52099291017b1fc8dc69e

SHA512
7e32c49433da6167f2703d1cf8ea19d3f06f19863184ed9ca4631a4b42efd5c30cacb6cbc682a37998a71274cd859f7573811f8022769184378f62acf76c29c8

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

Filesize
170B

MD5
ecf8ffa5b7a8e018f38d3784b660056b

SHA1
c84bb70f8746cb144bc25b0fe9012174d1047b72

SHA256
4696f7f72bd9b9dbaf3edcf079860a64822e3907a0c214b29ac0352679624f30

SHA512
ba360faa018bf15a89f9ff6993ab6583e028e6bf643c991795230939b296aaa6b9b0f3cfc1c47cadb4bd74be1c348a90a85ee8d97ad6717c9f10480afee9390a

Download Submit
C:\Users\Admin\AppData\Local\2f45cc07-7e34-4f13-97bc-8c583e8c2d0d\8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691N.exe

Filesize
695KB

MD5
999d1f23a3d2e1ba0668b7ed3317af30

SHA1
cc783775f56876c2b1af82f942fc3f3f4ed6ab37

SHA256
8452f9b899df6f5e6170738a1249551e7288af58bfccba239ddee41a3a629691

SHA512
53b9de37d9083e21ab5fb2ba5b8e57e1a62c7a31863507d356cd9ef98163279b26939562fb338b5709c44e1f3db1d5dcf66af8656b8b5b73db7be2d310a64cf9

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabC062.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/1948-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1948-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1948-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1948-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1948-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2112-6-0x00000000002E0000-0x0000000000372000-memory.dmp

Filesize
584KB

Download
memory/2112-0-0x00000000002E0000-0x0000000000372000-memory.dmp

Filesize
584KB

Download
memory/2112-1-0x0000000001D90000-0x0000000001EAB000-memory.dmp

Filesize
1.1MB

Download
memory/2612-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2612-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2768-31-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download
memory/2768-26-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download