djvu | 3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1

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

C2

http://cajgtus.com/test1/get.php

Attributes

extension
.watz
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
payload_url
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral1/memory/4568-2-0x00000000021E0000-0x00000000022FB000-memory.dmp	family_djvu
behavioral1/memory/4420-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4420-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4420-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4420-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4420-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3952-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4696	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-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7fc3b93d-5f89-43aa-9613-79911cb89f38\\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
18	api.2ip.ua
19	api.2ip.ua
24	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4568 set thread context of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 516 set thread context of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90

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
4420	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
4420	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
3952	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
3952	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4568 wrote to memory of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 4568 wrote to memory of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 4568 wrote to memory of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 4568 wrote to memory of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 4568 wrote to memory of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 4568 wrote to memory of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 4568 wrote to memory of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 4568 wrote to memory of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 4568 wrote to memory of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 4568 wrote to memory of 4420	4568	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	86
PID 4420 wrote to memory of 4696	4420	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	87
PID 4420 wrote to memory of 4696	4420	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	87
PID 4420 wrote to memory of 4696	4420	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	87
PID 4420 wrote to memory of 516	4420	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	88
PID 4420 wrote to memory of 516	4420	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	88
PID 4420 wrote to memory of 516	4420	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	88
PID 516 wrote to memory of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90
PID 516 wrote to memory of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90
PID 516 wrote to memory of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90
PID 516 wrote to memory of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90
PID 516 wrote to memory of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90
PID 516 wrote to memory of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90
PID 516 wrote to memory of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90
PID 516 wrote to memory of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90
PID 516 wrote to memory of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90
PID 516 wrote to memory of 3952	516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	90

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:4568
- C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
  "C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4420
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\7fc3b93d-5f89-43aa-9613-79911cb89f38" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4696
- - 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:516
  - - 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:3952

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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
dfaf6a26abdde9ad60396df313dcd088

SHA1
1f20e6a3888c13165023d1e7d17e4e522dabbe0f

SHA256
a25d3cfb1ed126464fc24c9687c75dbe35b6963a38cad253a5b13355f427e33b

SHA512
26f6ad2e32cc4dd4b63443af1a9904d5c3995b7d3f9f97eb505d62f1617284730e798b1d0f757a458fa459007238c68e805392f7bcc981c0eb97a4d9d3420750

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

Filesize
170B

MD5
082433d2fcfca44b4f321d8bba50c09a

SHA1
14b4b0119885e67af3e7c437a1e4af1cb756752e

SHA256
85fa8a2b5b112378f6a77ce919dfab5db34e477c4ecde1a710aef9d3d9b3f2ad

SHA512
7c0a788cec93f7703a5509d4fc0cbe19187a8b7ead1ca8120594e8cd5968dbcc08bdb9b20bd7b5ba779fdfe85d620aaa55f177ce3108d495745330a20a1e2e7f

Download Submit
C:\Users\Admin\AppData\Local\7fc3b93d-5f89-43aa-9613-79911cb89f38\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe

Filesize
729KB

MD5
d7528cd33b73718b5949277420681f90

SHA1
61d97f8da20ff2995890ce5f2c8a2c9e6e51c078

SHA256
3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1

SHA512
b3dab709e19a2a8bad92b259ea1739ad55564f6fe31e9f4e502b6280ae6c70cdf5a0f1fda208887da4bbcf9213986e2038abe6a09dc2940998df08d82e87d474

Download Submit
memory/516-19-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/516-23-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/3952-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3952-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4568-1-0x0000000002130000-0x00000000021D2000-memory.dmp

Filesize
648KB

Download
memory/4568-2-0x00000000021E0000-0x00000000022FB000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads