djvu | e01c0429a58b33013305aab35ef863cd2b88962e479e39566a687ca37c68510f

General

Target

buildz.exe
Size

709KB
MD5

b7cb7f2b5cd9bd047710650295dc88f7
SHA1

3740ba8e89055cb0f5068ec9176b05c77432e799
SHA256

e01c0429a58b33013305aab35ef863cd2b88962e479e39566a687ca37c68510f
SHA512

e6bd45366d067dcc6cdcdc4d917c4e819942caccf22b64a1b1cf45199cdbf58defa0773a8d6a76c0672db2824a724018253efb0db1a0baf0c2f105d07758b471
SSDEEP

12288:9CwgCcyMy1Nncixi2NWXCAcrIQBjljKsFKfFDKZNF:9cCp9KGiAAcUwjljKAK8ZNF

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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 17 IoCs

Processes:

resource	yara_rule
behavioral4/memory/4576-2-0x0000000002560000-0x000000000267B000-memory.dmp	family_djvu
behavioral4/memory/2868-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/2868-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/2868-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/2868-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/2868-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-43-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral4/memory/5032-46-0x0000000000400000-0x0000000000537000-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

2524 icacls.exe

pid	process
2524	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

buildz.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1735401866-3802634615-1355934272-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\20c5a42d-8263-469b-bc9f-adfab9816ad6\\buildz.exe\" --AutoStart"	buildz.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

1 api.2ip.ua
2 api.2ip.ua
6 api.2ip.ua

flow	ioc
1	api.2ip.ua
2	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

buildz.exebuildz.exe

description	pid	process	target process
PID 4576 set thread context of 2868	4576	buildz.exe	buildz.exe
PID 4668 set thread context of 5032	4668	buildz.exe	buildz.exe

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:

buildz.exebuildz.exeicacls.exebuildz.exebuildz.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	buildz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	buildz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	buildz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	buildz.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

buildz.exebuildz.exe

pid process

2868 buildz.exe
2868 buildz.exe
5032 buildz.exe
5032 buildz.exe

pid	process
2868	buildz.exe
2868	buildz.exe
5032	buildz.exe
5032	buildz.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

buildz.exebuildz.exebuildz.exe

description	pid	process	target process
PID 4576 wrote to memory of 2868	4576	buildz.exe	buildz.exe
PID 4576 wrote to memory of 2868	4576	buildz.exe	buildz.exe
PID 4576 wrote to memory of 2868	4576	buildz.exe	buildz.exe
PID 4576 wrote to memory of 2868	4576	buildz.exe	buildz.exe
PID 4576 wrote to memory of 2868	4576	buildz.exe	buildz.exe
PID 4576 wrote to memory of 2868	4576	buildz.exe	buildz.exe
PID 4576 wrote to memory of 2868	4576	buildz.exe	buildz.exe
PID 4576 wrote to memory of 2868	4576	buildz.exe	buildz.exe
PID 4576 wrote to memory of 2868	4576	buildz.exe	buildz.exe
PID 4576 wrote to memory of 2868	4576	buildz.exe	buildz.exe
PID 2868 wrote to memory of 2524	2868	buildz.exe	icacls.exe
PID 2868 wrote to memory of 2524	2868	buildz.exe	icacls.exe
PID 2868 wrote to memory of 2524	2868	buildz.exe	icacls.exe
PID 2868 wrote to memory of 4668	2868	buildz.exe	buildz.exe
PID 2868 wrote to memory of 4668	2868	buildz.exe	buildz.exe
PID 2868 wrote to memory of 4668	2868	buildz.exe	buildz.exe
PID 4668 wrote to memory of 5032	4668	buildz.exe	buildz.exe
PID 4668 wrote to memory of 5032	4668	buildz.exe	buildz.exe
PID 4668 wrote to memory of 5032	4668	buildz.exe	buildz.exe
PID 4668 wrote to memory of 5032	4668	buildz.exe	buildz.exe
PID 4668 wrote to memory of 5032	4668	buildz.exe	buildz.exe
PID 4668 wrote to memory of 5032	4668	buildz.exe	buildz.exe
PID 4668 wrote to memory of 5032	4668	buildz.exe	buildz.exe
PID 4668 wrote to memory of 5032	4668	buildz.exe	buildz.exe
PID 4668 wrote to memory of 5032	4668	buildz.exe	buildz.exe
PID 4668 wrote to memory of 5032	4668	buildz.exe	buildz.exe

C:\Users\Admin\AppData\Local\Temp\buildz.exe
"C:\Users\Admin\AppData\Local\Temp\buildz.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4576
- C:\Users\Admin\AppData\Local\Temp\buildz.exe
  "C:\Users\Admin\AppData\Local\Temp\buildz.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2868
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\20c5a42d-8263-469b-bc9f-adfab9816ad6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2524
- - C:\Users\Admin\AppData\Local\Temp\buildz.exe
    "C:\Users\Admin\AppData\Local\Temp\buildz.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4668
  - - C:\Users\Admin\AppData\Local\Temp\buildz.exe
      "C:\Users\Admin\AppData\Local\Temp\buildz.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:5032

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

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
b61a229cddb3fdf6f9bd4f0c2e4fe3af

SHA1
92182fd9edafafe2806d963d0f76be4af37774a0

SHA256
220411379598f8c46c81bff5677925819c4fe479339d420dc0d5bf5f428447d1

SHA512
5b47f73320d59107fe285db65a6b6a3ae0894d0fce6e029c8aaf474f74e0bed99602d4b2d854bb7cb73604fadfed40d761f7b7b6b33da3f62206ce7f35491a84

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

Filesize
170B

MD5
7120b4c5b033243781260af93bea2fb6

SHA1
deb7ed1f746cd20608e50c1931a3aa067c7f22c8

SHA256
a5289f2912ffdfcd879ee71a5009e94757a1892f6ee524412cc06f80cdcb3b93

SHA512
15191e9ef3aef575a46c9db0127f8f4dc05d5741e924cdf1ad6fd1988011207d92e58bd557d074c66d2adbea137d02c0f813c6dc52dab1dec41e2a15f7212166

Download Submit
C:\Users\Admin\AppData\Local\20c5a42d-8263-469b-bc9f-adfab9816ad6\buildz.exe

Filesize
709KB

MD5
b7cb7f2b5cd9bd047710650295dc88f7

SHA1
3740ba8e89055cb0f5068ec9176b05c77432e799

SHA256
e01c0429a58b33013305aab35ef863cd2b88962e479e39566a687ca37c68510f

SHA512
e6bd45366d067dcc6cdcdc4d917c4e819942caccf22b64a1b1cf45199cdbf58defa0773a8d6a76c0672db2824a724018253efb0db1a0baf0c2f105d07758b471

Download Submit
memory/2868-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2868-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2868-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2868-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2868-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4576-1-0x0000000000C20000-0x0000000000CBA000-memory.dmp

Filesize
616KB

Download
memory/4576-2-0x0000000002560000-0x000000000267B000-memory.dmp

Filesize
1.1MB

Download
memory/4668-23-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download
memory/4668-25-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download
memory/5032-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5032-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5032-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5032-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5032-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5032-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5032-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5032-43-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5032-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5032-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5032-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads