djvu | 455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2

General

Target

455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
Size

831KB
MD5

33bc5b92658baf8f7a4dfc35c9994250
SHA1

30e9143d9d0c8def9bd176663e62049356cd94c9
SHA256

455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2
SHA512

11568d107f8a3de82001811acc0c71506b6e3631b5dd7fc1e62f5e71c7bc324b64b7c1902423cb1b2196c129b60571df189fd6a6516080de4ceeb42271a29136
SSDEEP

12288:RTipzPV+q9TaI+u/htKL1MoFzEKMQe+LfGR1l68u7E9:Rk/aZeh21wQTfa68u7Q

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/4392-2-0x0000000005D90000-0x0000000005EAB000-memory.dmp	family_djvu
behavioral2/memory/4352-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4352-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4352-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4352-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4352-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4908-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
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-1-5-21-805952410-2104024357-1716932545-1000\Control Panel\International\Geo\Nation	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
384	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-1-5-21-805952410-2104024357-1716932545-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2b2bcaa1-252b-4418-92e6-522e43337770\\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe\" --AutoStart"	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.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
1	api.2ip.ua
2	api.2ip.ua
13	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4392 set thread context of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 2412 set thread context of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93

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	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4352	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
4352	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
4908	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
4908	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4392 wrote to memory of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 4392 wrote to memory of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 4392 wrote to memory of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 4392 wrote to memory of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 4392 wrote to memory of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 4392 wrote to memory of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 4392 wrote to memory of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 4392 wrote to memory of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 4392 wrote to memory of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 4392 wrote to memory of 4352	4392	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	86
PID 4352 wrote to memory of 384	4352	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	90
PID 4352 wrote to memory of 384	4352	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	90
PID 4352 wrote to memory of 384	4352	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	90
PID 4352 wrote to memory of 2412	4352	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	91
PID 4352 wrote to memory of 2412	4352	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	91
PID 4352 wrote to memory of 2412	4352	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	91
PID 2412 wrote to memory of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93
PID 2412 wrote to memory of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93
PID 2412 wrote to memory of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93
PID 2412 wrote to memory of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93
PID 2412 wrote to memory of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93
PID 2412 wrote to memory of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93
PID 2412 wrote to memory of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93
PID 2412 wrote to memory of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93
PID 2412 wrote to memory of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93
PID 2412 wrote to memory of 4908	2412	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	93

C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
"C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
  "C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.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:4352
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\2b2bcaa1-252b-4418-92e6-522e43337770" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:384
- - C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
    "C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2412
  - - C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
      "C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4908

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
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
a061b5e5d8c0ac8a1cedb97080f10284

SHA1
e16765f385a6b241824a2a8980ad53aca45ac2d5

SHA256
b7c88d48c920007a9c7d8ab627e0611aaee4c289b8bf03d4aa4e0fb89f4e9573

SHA512
439252b3530cc73b67209061d93c8007b2c3a74930260c7af11caf1c55c2977fa7672aefb54299056bba5519542ce883cb1e49c6258c30704238e8fab435c7d9

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

Filesize
170B

MD5
8898a1b4926678b26e8aba79bad792fd

SHA1
555648bcdb9343526af76c99e4496f6f8067551c

SHA256
67b44a0c91518865065ace3edc7106a80fe8d9c3260628b4922f0744dcb7f73f

SHA512
f3e6cc32028837d755e3f23c46423a7052bda6d7facb6e974ccafcf9dcee9be892d03266c5f7ab7a16d01c6560543864362bdcd9a66f5c51ebaecdfe0344f374

Download Submit
C:\Users\Admin\AppData\Local\2b2bcaa1-252b-4418-92e6-522e43337770\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe

Filesize
831KB

MD5
33bc5b92658baf8f7a4dfc35c9994250

SHA1
30e9143d9d0c8def9bd176663e62049356cd94c9

SHA256
455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2

SHA512
11568d107f8a3de82001811acc0c71506b6e3631b5dd7fc1e62f5e71c7bc324b64b7c1902423cb1b2196c129b60571df189fd6a6516080de4ceeb42271a29136

Download Submit
memory/4352-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4352-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4352-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4352-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4352-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4392-2-0x0000000005D90000-0x0000000005EAB000-memory.dmp

Filesize
1.1MB

Download
memory/4392-1-0x0000000004300000-0x0000000004399000-memory.dmp

Filesize
612KB

Download
memory/4908-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4908-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4908-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4908-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4908-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4908-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4908-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4908-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4908-38-0x0000000000400000-0x0000000000537000-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