djvu | b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70

Analysis

max time kernel
147s
max time network
128s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
21-10-2024 13:03

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General

Target

b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
Size

754KB
MD5

51cdffb93a6be165bbf7657410530d0d
SHA1

a479e69408af50ad5b5e12539fad8a98316f8fd0
SHA256

b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70
SHA512

1e6135c8399ab9289fa97afbf87a73b87a8d4850d73bffa67c41d38137723a0dcacc32c91340c260bf49bd2e2116d559fba218152d8ad6ab4e20ea0d6ea0d49c
SSDEEP

12288:46bRBPCVNzRrurNBVORUzCpdMtyfwbqBS9H4Tk53eiYaNLNvR:lbiVNpuFORu8dMMfbU7Yap

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://sajdfue.com/test2/get.php

Attributes

extension
.looy
offline_id
1eSPzWRaNslCgtjBZfL5pzvovoiaVI4IZSnvAwt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.com/files/1/build3.exe
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/3ed7a617738550b0a00c5aa231c0752020240316170955/d71ce1 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: 0858PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3064-2-0x0000000001DA0000-0x0000000001EBB000-memory.dmp	family_djvu
behavioral1/memory/2140-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2140-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2140-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2140-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-58-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2836-61-0x0000000000400000-0x0000000000537000-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

Processes:

icacls.exe

pid	Process
2856	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\828c72a5-521d-4104-850c-86e1322c9dc2\\b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe\" --AutoStart"	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.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.

Processes:

flow	ioc
4	api.2ip.ua
5	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exeb43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe

description	pid	Process	procid_target
PID 3064 set thread context of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 2832 set thread context of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.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

Processes:

b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exeb43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exeicacls.exeb43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exeb43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exeb43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe

pid	Process
2140	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
2140	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
2836	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
2836	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exeb43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exeb43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe

description	pid	Process	procid_target
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 3064 wrote to memory of 2140	3064	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	30
PID 2140 wrote to memory of 2856	2140	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	32
PID 2140 wrote to memory of 2856	2140	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	32
PID 2140 wrote to memory of 2856	2140	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	32
PID 2140 wrote to memory of 2856	2140	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	32
PID 2140 wrote to memory of 2832	2140	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	33
PID 2140 wrote to memory of 2832	2140	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	33
PID 2140 wrote to memory of 2832	2140	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	33
PID 2140 wrote to memory of 2832	2140	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	33
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35
PID 2832 wrote to memory of 2836	2832	b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe	35

C:\Users\Admin\AppData\Local\Temp\b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
"C:\Users\Admin\AppData\Local\Temp\b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Users\Admin\AppData\Local\Temp\b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
  "C:\Users\Admin\AppData\Local\Temp\b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2140
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\828c72a5-521d-4104-850c-86e1322c9dc2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2856
- - C:\Users\Admin\AppData\Local\Temp\b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
    "C:\Users\Admin\AppData\Local\Temp\b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2832
  - - C:\Users\Admin\AppData\Local\Temp\b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe
      "C:\Users\Admin\AppData\Local\Temp\b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2836

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
67e486b2f148a3fca863728242b6273e

SHA1
452a84c183d7ea5b7c015b597e94af8eef66d44a

SHA256
facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb

SHA512
d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e

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
20e57091fe292b75e25bd45d9bef4881

SHA1
98e80cc0f78adb9fb0a4c468b03b15a972d0bd9b

SHA256
6e15450fb66189a11912bf06f21a827b6544fe9b8a3460fef0d0274400606b07

SHA512
979ff87b4bc09dc7e9d6360db2a1e011ae75d7e7f9365f647807c503eca58c4d166c4c34d002ef257b2797cb9bc46dd4ab00897bb60e5ecc2ddce765fa557902

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

Filesize
170B

MD5
a5f3be61233f799393e751ea3101d738

SHA1
bab732d8cfefe804738c2130b67ec0b7e499c263

SHA256
aaeb44931ee4672e22cfb9cbba8ad0c999aef8901b702e03858958fa45fb12c0

SHA512
e3366ab10dbbc66118051d0824aaf1138994737845bfb3346f13708f5c580cb9419028da1a930103614bc246a0c8f9b07ff64628c92d1d5c69d6dd3eb07ad36d

Download Submit
C:\Users\Admin\AppData\Local\828c72a5-521d-4104-850c-86e1322c9dc2\b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70.exe

Filesize
754KB

MD5
51cdffb93a6be165bbf7657410530d0d

SHA1
a479e69408af50ad5b5e12539fad8a98316f8fd0

SHA256
b43118f2550262e243a70fe40572428e3921f5e6c6a53c3c4c85e5cbd4325d70

SHA512
1e6135c8399ab9289fa97afbf87a73b87a8d4850d73bffa67c41d38137723a0dcacc32c91340c260bf49bd2e2116d559fba218152d8ad6ab4e20ea0d6ea0d49c

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabD385.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/2140-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2140-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2140-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2140-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2140-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-30-0x0000000000400000-0x00000000004FC000-memory.dmp

Filesize
1008KB

Download
memory/2832-34-0x0000000000400000-0x00000000004FC000-memory.dmp

Filesize
1008KB

Download
memory/2832-29-0x00000000002C0000-0x0000000000352000-memory.dmp

Filesize
584KB

Download
memory/2836-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2836-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2836-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2836-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2836-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2836-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2836-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2836-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2836-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2836-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

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memory/2836-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

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memory/3064-0-0x0000000000310000-0x00000000003A2000-memory.dmp

Filesize
584KB

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memory/3064-2-0x0000000001DA0000-0x0000000001EBB000-memory.dmp

Filesize
1.1MB

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memory/3064-1-0x0000000000310000-0x00000000003A2000-memory.dmp

Filesize
584KB

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