djvu | bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2

Analysis

max time kernel
147s
max time network
133s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
08-01-2025 19:57

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General

Target

bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Size

766KB
MD5

2cb8c190f4cc23501bc6965d9d762977
SHA1

3b6f667d28eec165a2ccfaed4fb3cf87084b06ed
SHA256

bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2
SHA512

295dee006e2d991ffc6b8016a02a2e171973552527bfa3c040f91aabb46c2233c62dbf41dec0d97db61ac1f145c875f79a3bfa28c09b74c1ed23016abd729697
SSDEEP

12288:nKDiXNmHNpcGWH69SIW5JBvOwcMBl4tT5jVXctOpctHni7LEwvn:nMiXNKNpM6jW5JDcIit+OpAHUEw/

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 14 IoCs

resource	yara_rule
behavioral1/memory/2860-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2860-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2860-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2760-2-0x00000000021B0000-0x00000000022CB000-memory.dmp	family_djvu
behavioral1/memory/2860-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2256-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2256-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2256-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2256-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2256-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2256-58-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2256-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2256-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2256-59-0x0000000000400000-0x0000000000537000-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
2804	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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\9fa85e5d-7ec6-4ac9-ba09-1c8f20865c55\\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe\" --AutoStart"	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.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 2760 set thread context of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2668 set thread context of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.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	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2860	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
2860	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
2256	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
2256	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2760 wrote to memory of 2860	2760	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	30
PID 2860 wrote to memory of 2804	2860	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	31
PID 2860 wrote to memory of 2804	2860	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	31
PID 2860 wrote to memory of 2804	2860	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	31
PID 2860 wrote to memory of 2804	2860	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	31
PID 2860 wrote to memory of 2668	2860	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	32
PID 2860 wrote to memory of 2668	2860	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	32
PID 2860 wrote to memory of 2668	2860	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	32
PID 2860 wrote to memory of 2668	2860	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	32
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33
PID 2668 wrote to memory of 2256	2668	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	33

C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
"C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2760
- C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
  "C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2860
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\9fa85e5d-7ec6-4ac9-ba09-1c8f20865c55" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2804
- - C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
    "C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2668
  - - C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
      "C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2256

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
dd391a6cda739d145324d809edce26be

SHA1
e384dfa4bd44d36ad5168a8d77182981536b07fb

SHA256
e1d429d4130715a9b98aa1c870c0b7a9b7426dda1c74996b4e732376b01e2dd2

SHA512
622de4fd78efd37508c2e04760d323dc1acecd34b0ee930a04453ac780886a1ced2ed9db8883c4e8e9ca0fd140b668b7a8beba63363ba7a81ff3c0b1affe3beb

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

Filesize
342B

MD5
26cc84d9d1b1079129ee239945f1a768

SHA1
649aae97cea07a03ccef3c3c3f55b5d002ee30e3

SHA256
f1411da73429e83fbbf162082f1232f49c52f629eab2926b11751de752e2ceb4

SHA512
d8537afd395c0d0891e566b06490a81b4103a4cb8f605d29483f70d7509f348f6bd99b4e569b8353065dc92a0bb2a85636c31a9456a136be00f2900269f4305a

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

Filesize
170B

MD5
938969d9553834d69dbd5a5e48f0df2d

SHA1
d446b77c42d72534956e6971d5acdd7b0f5e6a39

SHA256
e4cf24248237ffb5f2e6a445611ac53efe929b5c32b8e42f544b6df46f739490

SHA512
ff6caf3052552fbe9f8296e208d58b04ad2f2be202e8ebd26015f04c18d08552a386ca94091f72bfff9d60e084cf5bf34de4b3ba5c2add8116143eb772a308a3

Download Submit
C:\Users\Admin\AppData\Local\9fa85e5d-7ec6-4ac9-ba09-1c8f20865c55\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe

Filesize
766KB

MD5
2cb8c190f4cc23501bc6965d9d762977

SHA1
3b6f667d28eec165a2ccfaed4fb3cf87084b06ed

SHA256
bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2

SHA512
295dee006e2d991ffc6b8016a02a2e171973552527bfa3c040f91aabb46c2233c62dbf41dec0d97db61ac1f145c875f79a3bfa28c09b74c1ed23016abd729697

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab5419.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/2256-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2256-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2256-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2256-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2256-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2256-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2256-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2256-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2256-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2668-36-0x0000000000400000-0x0000000000898000-memory.dmp

Filesize
4.6MB

Download
memory/2668-30-0x00000000020C0000-0x0000000002151000-memory.dmp

Filesize
580KB

Download
memory/2760-0-0x0000000000320000-0x00000000003B1000-memory.dmp

Filesize
580KB

Download
memory/2760-1-0x0000000000320000-0x00000000003B1000-memory.dmp

Filesize
580KB

Download
memory/2760-2-0x00000000021B0000-0x00000000022CB000-memory.dmp

Filesize
1.1MB

Download
memory/2760-7-0x0000000000320000-0x00000000003B1000-memory.dmp

Filesize
580KB

Download
memory/2860-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2860-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download