djvu | 2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84

Analysis

max time kernel
294s
max time network
155s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05/09/2024, 22:33

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General

Target
2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
Size 812KB
Sample240905-2gtfaasfkb
SHA256 2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84
MD5 7972b08246e568495d9d116fc2d0b159
SHA1 3e12225494f08369858453fd9fc7481b4f788165
SHA512 f0ead246f31d1badb3cd5fd67cb5b3081f027fdad44dd50364734d61722f1bc2cacb1ad5d842ca3f7000a2699e7bdf059a508b54a95f5e155ae274d70e833ff7
SSDEEP 24576:60oeRhL4Zihw/WaRupypku1ADMH0h0kT:60J482RuRuQMm
MD5 SHA1 SHA512 SSDEEP

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/2524-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2088-5-0x0000000000660000-0x000000000077B000-memory.dmp	family_djvu
behavioral1/memory/2524-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2524-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-61-0x0000000000400000-0x0000000000537000-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
2832	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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3f9d3fb7-ba80-4357-ae5b-12d155f8a1aa\\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
4	api.2ip.ua
5	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2088 set thread context of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2912 set thread context of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.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	icacls.exe
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	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
2084	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
2084	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2088 wrote to memory of 2524	2088	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	30
PID 2524 wrote to memory of 2832	2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	32
PID 2524 wrote to memory of 2832	2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	32
PID 2524 wrote to memory of 2832	2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	32
PID 2524 wrote to memory of 2832	2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	32
PID 2524 wrote to memory of 2912	2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2524 wrote to memory of 2912	2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2524 wrote to memory of 2912	2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2524 wrote to memory of 2912	2524	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	33
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34
PID 2912 wrote to memory of 2084	2912	2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe	34

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:2088
- 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:2524
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\3f9d3fb7-ba80-4357-ae5b-12d155f8a1aa" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2832
- - 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:2912
  - - 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:2084

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

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 1KB
SHA256 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
MD5 7fb5fa1534dcf77f2125b2403b30a0ee
SHA1 365d96812a69ac0a4611ea4b70a3f306576cc3ea
SHA512 a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e
MD5 SHA1 SHA512

Submit Download

B46811C17859FFB409CF0E904A4AA8F8

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

Submit Download

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 174B
SHA256 6234129f7dd2821642983394a5620172a0e46f157413592aeb6c570adb22ad79
MD5 77ee47479fc22d6c2755fac8fe258b3a
SHA1 3000618b794b750f8a1defb586f23d3d2f35ce71
SHA512 4150529f6c627b1a383b66edb322ae8960b0a43d35f8ba926bbde4dfbbb53d16cf5f40bc7d6a7859b7379a74d5fc0a671996808b647e9eb5f5c2e4510a7de433
MD5 SHA1 SHA512

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B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Size 170B
SHA256 8852108856900c0fde47143d37fb6b3b051a0b3301b6164742b137fea210163f
MD5 eed9eddaaf8c0dbed229d44465e948a0
SHA1 a13971f708d064824d4e7f6966fa263630c81d44
SHA512 b7d801a9df8f7d7a26c3a075901d066fcb3c1d135ed8ca835510da39dc091ad74b444701c7234bb5870995e740087a40e5d42f566df1d7ac02062a3a813b2502
MD5 SHA1 SHA512

Submit Download

2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe

Path C:\Users\Admin\AppData\Local\3f9d3fb7-ba80-4357-ae5b-12d155f8a1aa\2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84.exe
Size 812KB
SHA256 2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84
MD5 7972b08246e568495d9d116fc2d0b159
SHA1 3e12225494f08369858453fd9fc7481b4f788165
SHA512 f0ead246f31d1badb3cd5fd67cb5b3081f027fdad44dd50364734d61722f1bc2cacb1ad5d842ca3f7000a2699e7bdf059a508b54a95f5e155ae274d70e833ff7
SSDEEP 24576:60oeRhL4Zihw/WaRupypku1ADMH0h0kT:60J482RuRuQMm
MD5 SHA1 SHA512 SSDEEP

Submit Download

CabDEEA.tmp

Path C:\Users\Admin\AppData\Local\Temp\CabDEEA.tmp
Size 70KB
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
SSDEEP 1536:gc257bHnClJ3v5mnAQEBP+bfnW8Ctl8G1G4eu76NWDdB34w18R5cBWcJAm68+Q:gp2ld5jPqW8LgeulxB3fgcEfDQ
MD5 SHA1 SHA512 SSDEEP

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memory/2084-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2084-52-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2084-61-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2084-59-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2084-60-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2084-57-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2084-51-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2084-53-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2084-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2088-0-0x0000000000360000-0x00000000003F1000-memory.dmp

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memory/2088-5-0x0000000000660000-0x000000000077B000-memory.dmp

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memory/2088-1-0x0000000000360000-0x00000000003F1000-memory.dmp

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memory/2088-6-0x0000000000360000-0x00000000003F1000-memory.dmp

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memory/2524-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2524-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2524-9-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2524-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2524-8-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2912-36-0x0000000000400000-0x000000000065D000-memory.dmp

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memory/2912-30-0x0000000000400000-0x000000000065D000-memory.dmp

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memory/2912-29-0x0000000000310000-0x00000000003A1000-memory.dmp

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