djvu | 3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1

Analysis

max time kernel
142s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
10-08-2024 01:13

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General

Target

3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
Size

729KB
MD5

d7528cd33b73718b5949277420681f90
SHA1

61d97f8da20ff2995890ce5f2c8a2c9e6e51c078
SHA256

3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1
SHA512

b3dab709e19a2a8bad92b259ea1739ad55564f6fe31e9f4e502b6280ae6c70cdf5a0f1fda208887da4bbcf9213986e2038abe6a09dc2940998df08d82e87d474
SSDEEP

12288:koywWrwlTyC9yR+xBP4wMpAuhjH8/Hl19KKjNgzqE0CM6EpJMwk:PlTX9Xj4w+hbM1/g2kM

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/1748-2-0x0000000001D20000-0x0000000001E3B000-memory.dmp	family_djvu
behavioral1/memory/2468-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2468-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2468-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2468-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1256-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1256-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1256-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1256-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1256-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1256-62-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1256-63-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1256-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1256-64-0x0000000000400000-0x0000000000537000-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
2688	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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\af15e83c-60b0-4cc7-a8a8-37e2a73b8e2e\\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe\" --AutoStart"	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.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 1748 set thread context of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 2592 set thread context of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.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	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2468	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
2468	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
1256	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
1256	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1748 wrote to memory of 2468	1748	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 2468 wrote to memory of 2688	2468	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	31
PID 2468 wrote to memory of 2688	2468	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	31
PID 2468 wrote to memory of 2688	2468	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	31
PID 2468 wrote to memory of 2688	2468	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	31
PID 2468 wrote to memory of 2592	2468	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	32
PID 2468 wrote to memory of 2592	2468	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	32
PID 2468 wrote to memory of 2592	2468	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	32
PID 2468 wrote to memory of 2592	2468	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	32
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2592 wrote to memory of 1256	2592	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33

C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
"C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
  "C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2468
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\af15e83c-60b0-4cc7-a8a8-37e2a73b8e2e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2688
- - C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
    "C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2592
  - - C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
      "C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:1256

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
7940a85561adca39551103f8738a154d

SHA1
de18c18b83fc52ac7803cf51fa9ba7619795ffe8

SHA256
fd92c128f5b576c611f0449db9131a8f9c2100e78c8af138213506202b8b2d7e

SHA512
bd5119ea13264039667ea8066c7c9c2720a4910f99e320cc12391397627b27481578fc144101cbbc4ef77343b21659102a0fc593a59a134b19aba6442b18c172

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

Filesize
342B

MD5
f95567fb7f11223fe6b5ee9c3b0f085c

SHA1
00d37168467b0fd55174acf722fe2dacadd6d6b1

SHA256
a14c4c8182baa674a91589f82f5c94b57bad6429beec659c6bc67a56fce836b6

SHA512
ffe5f7a6ec79ef1950c2a259610b26cdce7952c50f40b06117dfa51af12a4fdf62f342b9b3c89025957a1405784e94ddc24fdc0605a0be6f10bc351502079029

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

Filesize
170B

MD5
9b9c48f1cc2b75c055c3517b50131ba6

SHA1
ee07ca9c2c35e0e7bbda0d9de4af79c3530f2b02

SHA256
d3a8a7bcb32814b2e2f2277047fc38a28dd8f72cdca71724f629a6c9d42f071c

SHA512
593f95be081df943a85a5e72e7238ddad475d63515ffcad01ebff9dd4b8103417769096a75b03a06366315d4c0f66f0adb476e1259e0af718bbde010a37c4ccb

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab6A95.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\af15e83c-60b0-4cc7-a8a8-37e2a73b8e2e\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe

Filesize
729KB

MD5
d7528cd33b73718b5949277420681f90

SHA1
61d97f8da20ff2995890ce5f2c8a2c9e6e51c078

SHA256
3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1

SHA512
b3dab709e19a2a8bad92b259ea1739ad55564f6fe31e9f4e502b6280ae6c70cdf5a0f1fda208887da4bbcf9213986e2038abe6a09dc2940998df08d82e87d474

Download Submit
memory/1256-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1256-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1256-64-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1256-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1256-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1256-63-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1256-62-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1256-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1256-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1748-0-0x0000000000280000-0x0000000000312000-memory.dmp

Filesize
584KB

Download
memory/1748-2-0x0000000001D20000-0x0000000001E3B000-memory.dmp

Filesize
1.1MB

Download
memory/1748-1-0x0000000000280000-0x0000000000312000-memory.dmp

Filesize
584KB

Download
memory/2468-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2468-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2468-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2468-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2468-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-37-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/2592-32-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/2592-31-0x0000000000260000-0x00000000002F2000-memory.dmp

Filesize
584KB

Download