djvu | 4f0b7596807a10a623017aa0b4be82e2f62f3a1ed7bbcad2ce66016c256e0de4

Analysis

max time kernel
142s
max time network
33s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
04-09-2024 12:28

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General

Target

2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
Size

812KB
MD5

7972b08246e568495d9d116fc2d0b159
SHA1

3e12225494f08369858453fd9fc7481b4f788165
SHA256

2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84
SHA512

f0ead246f31d1badb3cd5fd67cb5b3081f027fdad44dd50364734d61722f1bc2cacb1ad5d842ca3f7000a2699e7bdf059a508b54a95f5e155ae274d70e833ff7
SSDEEP

24576:60oeRhL4Zihw/WaRupypku1ADMH0h0kT:60J482RuRuQMm

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.watz
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
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: https://wetransfer.com/downloads/abe121434ad837dd5bdd03878a14485820240531135509/34284d 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: 0874PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/2220-2-0x0000000001F00000-0x000000000201B000-memory.dmp	family_djvu
behavioral1/memory/2288-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2288-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2288-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2288-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-61-0x0000000000400000-0x0000000000537000-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
2060	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-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a5475ddd-3837-48f9-9e16-c9cf8a7c7330\\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe\" --AutoStart"	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.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
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2220 set thread context of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2872 set thread context of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33

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	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2288	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
2288	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2220 wrote to memory of 2288	2220	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2288 wrote to memory of 2060	2288	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	31
PID 2288 wrote to memory of 2060	2288	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	31
PID 2288 wrote to memory of 2060	2288	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	31
PID 2288 wrote to memory of 2060	2288	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	31
PID 2288 wrote to memory of 2872	2288	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	32
PID 2288 wrote to memory of 2872	2288	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	32
PID 2288 wrote to memory of 2872	2288	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	32
PID 2288 wrote to memory of 2872	2288	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	32
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2872 wrote to memory of 2524	2872	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33

C:\Users\Admin\AppData\Local\Temp\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
"C:\Users\Admin\AppData\Local\Temp\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Users\Admin\AppData\Local\Temp\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
  "C:\Users\Admin\AppData\Local\Temp\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2288
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\a5475ddd-3837-48f9-9e16-c9cf8a7c7330" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2060
- - C:\Users\Admin\AppData\Local\Temp\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
    "C:\Users\Admin\AppData\Local\Temp\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2872
  - - C:\Users\Admin\AppData\Local\Temp\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
      "C:\Users\Admin\AppData\Local\Temp\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2524

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
7fb5fa1534dcf77f2125b2403b30a0ee

SHA1
365d96812a69ac0a4611ea4b70a3f306576cc3ea

SHA256
33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

SHA512
a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

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
834c09d5722ed1c2890e11030706c286

SHA1
2fe79ee4b7c917bde6d0912a8bdcc40b0c5b94b6

SHA256
7680f5f92b1a6a19e89142cf7dc9db085e1102c0749fc3acb1d26fd6295e8b9d

SHA512
e6453f51312314b538b4962fd8e53be9a632baf16f228ee6ed8f2a144cb7a3b45d82eb12b2f9a3148fc9bc0dc4098e73afd2f9c0530ff8ad0cde9235a3b3bd6a

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
7bf89d403a43b031c7b440f894d12f15

SHA1
eebab4dbad3b603ce64607d1a0f1b4a87157cd03

SHA256
92449c8935a810f7106f8069438d0c14135621e54fcb245ffa7553befcad7b0f

SHA512
28759d3eddb06490c0907c3c0dffeb5af5a5f264dcaed44748f86ed267946bdc94449cd00206a0d49767b79248ef49e28d10e2b6586f1b293d1e42c78ae42233

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

Filesize
170B

MD5
b50ecb0924426b05a850e0644a4e570d

SHA1
f11a4741adbd755cfd035380d621c7d18159fca2

SHA256
aa9e5c4d9f12dcd9daad2468baadfbeae1746319235e6b46d140c37c374d94f8

SHA512
656e139bd3ec60155d11b3d6ff480e983b2943d2d392f8a481cc9896f8313c8e3eab5ee8efa4b4ee99574644e5848c2377c0bacdbd56a66881443f0e07ce2263

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabA8FC.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\a5475ddd-3837-48f9-9e16-c9cf8a7c7330\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe

Filesize
812KB

MD5
7972b08246e568495d9d116fc2d0b159

SHA1
3e12225494f08369858453fd9fc7481b4f788165

SHA256
2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84

SHA512
f0ead246f31d1badb3cd5fd67cb5b3081f027fdad44dd50364734d61722f1bc2cacb1ad5d842ca3f7000a2699e7bdf059a508b54a95f5e155ae274d70e833ff7

Download Submit
memory/2220-0-0x0000000001E60000-0x0000000001EF1000-memory.dmp

Filesize
580KB

Download
memory/2220-6-0x0000000001E60000-0x0000000001EF1000-memory.dmp

Filesize
580KB

Download
memory/2220-2-0x0000000001F00000-0x000000000201B000-memory.dmp

Filesize
1.1MB

Download
memory/2220-1-0x0000000001E60000-0x0000000001EF1000-memory.dmp

Filesize
580KB

Download
memory/2288-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2288-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2288-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2288-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2288-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2524-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2524-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2524-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2524-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2524-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2524-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2524-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2524-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2524-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2872-38-0x0000000000400000-0x000000000065D000-memory.dmp

Filesize
2.4MB

Download
memory/2872-34-0x0000000000400000-0x000000000065D000-memory.dmp

Filesize
2.4MB

Download
memory/2872-30-0x0000000001DF0000-0x0000000001E81000-memory.dmp

Filesize
580KB

Download