djvu | 4db18bb82c0143d95eea29fb1416348936007290889eb5ab1f5332d09db43bdb

Analysis

max time kernel
140s
max time network
130s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08/03/2025, 20:34

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General

Target

d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
Size

732KB
MD5

cdc4132b29e414f192431cf17c959a56
SHA1

a26f541c8130c404020d76d98b4fb4c3c9600f99
SHA256

d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701
SHA512

d85935b75ce1a78b026ccc2e015c1cf1e3013114a8ba0f2e48c2bc4d93cdbd913f18016214335c5111c491716f7a823e58366fb4a37778d32be78478ed128eef
SSDEEP

12288:HLtTB27VeNWombj8dJBpuz4I3hrJAb8hWzmYe9VOucjSdsdfyv:rtUJ6W7WEcENAbbqmSdsNyv

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qual
offline_id
KLbRmn6on3AXGFgDLGtd0IkHmV7uHw9VxlcxO5t1
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: 0876qual

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/2524-2-0x00000000039F0000-0x0000000003B0B000-memory.dmp	family_djvu
behavioral1/memory/2992-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2992-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2992-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2992-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2976-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2976-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2976-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2976-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2976-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2976-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2976-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2976-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2976-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2976-58-0x0000000000400000-0x0000000000537000-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
2452	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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7ef282e1-44b0-4bad-8468-692a3f0ef8cf\\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe\" --AutoStart"	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.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 2524 set thread context of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2712 set thread context of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35

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	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2992	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
2992	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
2976	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
2976	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2524 wrote to memory of 2992	2524	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	31
PID 2992 wrote to memory of 2452	2992	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	33
PID 2992 wrote to memory of 2452	2992	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	33
PID 2992 wrote to memory of 2452	2992	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	33
PID 2992 wrote to memory of 2452	2992	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	33
PID 2992 wrote to memory of 2712	2992	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	34
PID 2992 wrote to memory of 2712	2992	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	34
PID 2992 wrote to memory of 2712	2992	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	34
PID 2992 wrote to memory of 2712	2992	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	34
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35
PID 2712 wrote to memory of 2976	2712	d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe	35

C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
"C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
  "C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2992
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\7ef282e1-44b0-4bad-8468-692a3f0ef8cf" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2452
- - C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
    "C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2712
  - - C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe
      "C:\Users\Admin\AppData\Local\Temp\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2976

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
c9be626e9715952e9b70f92f912b9787

SHA1
aa2e946d9ad9027172d0d321917942b7562d6abe

SHA256
c13e8d22800c200915f87f71c31185053e4e60ca25de2e41e160e09cd2d815d4

SHA512
7581b7c593785380e9db3ae760af85c1a889f607a3cd2aa5a2695a0e5a0fe8ee751578e88f7d8c997faeda804e2fc2655d859bee2832eace526ed4379edaa3f5

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
690068fd8618f94329cb703ae22dd97d

SHA1
f6563107737d7cbaca0e633879f24e389e2242d3

SHA256
b7c2eb8c766e8b2f63948af4fa32c368ad6537e48472a7beb89ec071bfff2205

SHA512
c0dc5de032ec04f04ebfec4fc0d9f2f47ee5a91d242e79fc251dbe95703706560e5abfe834fa79ca1a6d34c1697dcbcabc60239d560a3104f3282c8fd012424d

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

Filesize
170B

MD5
3707a3d685a35841c946aa17e12829a9

SHA1
dfeb4866bdbeda9cffc458e71c6bd6c8ac9b1d17

SHA256
75884bcadd3e41d2eb6f4f06304a66bb2602a904d9baebaa616db48fcc7c4131

SHA512
939b6ec562bff4f8a7da32fa9e2a4ec42be2c56ce954ae4c9d2c342ec414d671d0991972437810e2f6c94312af04a06b26a4a679f4fcb389fb1d1a17e531d0fc

Download Submit
C:\Users\Admin\AppData\Local\7ef282e1-44b0-4bad-8468-692a3f0ef8cf\d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701.exe

Filesize
732KB

MD5
cdc4132b29e414f192431cf17c959a56

SHA1
a26f541c8130c404020d76d98b4fb4c3c9600f99

SHA256
d148dedc9b654f78a2ddd2298663df99d57d00cdec9e97a3722496cc51c60701

SHA512
d85935b75ce1a78b026ccc2e015c1cf1e3013114a8ba0f2e48c2bc4d93cdbd913f18016214335c5111c491716f7a823e58366fb4a37778d32be78478ed128eef

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabF43E.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/2524-1-0x0000000003950000-0x00000000039E1000-memory.dmp

Filesize
580KB

Download
memory/2524-2-0x00000000039F0000-0x0000000003B0B000-memory.dmp

Filesize
1.1MB

Download
memory/2524-0-0x0000000003950000-0x00000000039E1000-memory.dmp

Filesize
580KB

Download
memory/2524-7-0x0000000003950000-0x00000000039E1000-memory.dmp

Filesize
580KB

Download
memory/2712-29-0x0000000000300000-0x0000000000391000-memory.dmp

Filesize
580KB

Download
memory/2976-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2992-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2992-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2992-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2992-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2992-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download