djvu | f23c7c958001a1eb56b4f4fee91d024f22eed3a3fd88a59eefff09a677ad7478

General

Target

opgdt.exe
Size

736KB
MD5

664de3b2a24525498193312ba05bbd59
SHA1

6aec18d934495a68b8a3fbee3ac6e4d0a44f0400
SHA256

f23c7c958001a1eb56b4f4fee91d024f22eed3a3fd88a59eefff09a677ad7478
SHA512

2967289dc6eaa0673ee71718e3493cd36f4a27f9d1edbb68bf6d0cdc66c9373fea9b1bed1f1238013f064d4901666fb535deb84e541875a58d0cb07dd256177f
SSDEEP

12288:xIq8+GU7BALLZq4ah/h+c+s9k0vI50mJqLGiPMDoEA/7LCy2inm:xIqlhGFq4ahJ+cd9k0vI50mJiDYoJjLC

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/raud/get.php

Attributes

extension
.coza
offline_id
O8Ao46dcCReRPC4I1PGMYsRFFc9WI5eOp0O3MFt1
payload_url
http://colisumy.com/dl/build2.exe

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

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/4348-2-0x0000000004990000-0x0000000004AAB000-memory.dmp	family_djvu
behavioral2/memory/5016-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-43-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-61-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-63-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-64-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-65-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-66-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Checks computer location settings 2 TTPs 2 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	opgdt.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	opgdt.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3176	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\\5339e9ea-fd88-444a-92aa-61d08849db9a\\opgdt.exe\" --AutoStart"	opgdt.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
5	api.2ip.ua
14	api.2ip.ua
4	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4348 set thread context of 5016	4348	opgdt.exe	86
PID 1460 set thread context of 4420	1460	opgdt.exe	91

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5016	opgdt.exe
5016	opgdt.exe
4420	opgdt.exe
4420	opgdt.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4348 wrote to memory of 5016	4348	opgdt.exe	86
PID 4348 wrote to memory of 5016	4348	opgdt.exe	86
PID 4348 wrote to memory of 5016	4348	opgdt.exe	86
PID 4348 wrote to memory of 5016	4348	opgdt.exe	86
PID 4348 wrote to memory of 5016	4348	opgdt.exe	86
PID 4348 wrote to memory of 5016	4348	opgdt.exe	86
PID 4348 wrote to memory of 5016	4348	opgdt.exe	86
PID 4348 wrote to memory of 5016	4348	opgdt.exe	86
PID 4348 wrote to memory of 5016	4348	opgdt.exe	86
PID 4348 wrote to memory of 5016	4348	opgdt.exe	86
PID 5016 wrote to memory of 3176	5016	opgdt.exe	88
PID 5016 wrote to memory of 3176	5016	opgdt.exe	88
PID 5016 wrote to memory of 3176	5016	opgdt.exe	88
PID 5016 wrote to memory of 1460	5016	opgdt.exe	89
PID 5016 wrote to memory of 1460	5016	opgdt.exe	89
PID 5016 wrote to memory of 1460	5016	opgdt.exe	89
PID 1460 wrote to memory of 4420	1460	opgdt.exe	91
PID 1460 wrote to memory of 4420	1460	opgdt.exe	91
PID 1460 wrote to memory of 4420	1460	opgdt.exe	91
PID 1460 wrote to memory of 4420	1460	opgdt.exe	91
PID 1460 wrote to memory of 4420	1460	opgdt.exe	91
PID 1460 wrote to memory of 4420	1460	opgdt.exe	91
PID 1460 wrote to memory of 4420	1460	opgdt.exe	91
PID 1460 wrote to memory of 4420	1460	opgdt.exe	91
PID 1460 wrote to memory of 4420	1460	opgdt.exe	91
PID 1460 wrote to memory of 4420	1460	opgdt.exe	91

C:\Users\Admin\AppData\Local\Temp\opgdt.exe
"C:\Users\Admin\AppData\Local\Temp\opgdt.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4348
- C:\Users\Admin\AppData\Local\Temp\opgdt.exe
  "C:\Users\Admin\AppData\Local\Temp\opgdt.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:5016
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\5339e9ea-fd88-444a-92aa-61d08849db9a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3176
- - C:\Users\Admin\AppData\Local\Temp\opgdt.exe
    "C:\Users\Admin\AppData\Local\Temp\opgdt.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1460
  - - C:\Users\Admin\AppData\Local\Temp\opgdt.exe
      "C:\Users\Admin\AppData\Local\Temp\opgdt.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Checks computer location settings
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4420

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

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
8136a2798dd6e4424e20df13c81cdbf5

SHA1
dd9606254be635c2cbb4cba7a52b77db6e8390f4

SHA256
db452f87e52a5bd4dc24b86279646bf955738ca3a7ebdc598f45801dd278a6d3

SHA512
92ecdb68c936cc8c9b9a113c98ecdf460c86007b3c77cb0e6f4104f630c6c82215703a0985d0b2a58436fe2897ba55fe014c0ab2e71ff82429bee6bc5570291f

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

Filesize
170B

MD5
44c6823c5f99e46962c229201d2c273f

SHA1
0d3a0e7fac1502646eaad9c7350fd3e08d081c34

SHA256
1bc6e333e005023b5020bc267d0f1672e16ad4cbe13e9863635cd3b86181ff45

SHA512
a92c567e17716400a048b75b2c2a4100517e1911f62a488e81e12ab6f8014f3336b37855be4bd94bb0402f9a92c068e7a9a53d0e1105a1f7758cdc2b3d8a0dcd

Download Submit
C:\Users\Admin\AppData\Local\5339e9ea-fd88-444a-92aa-61d08849db9a\opgdt.exe

Filesize
736KB

MD5
664de3b2a24525498193312ba05bbd59

SHA1
6aec18d934495a68b8a3fbee3ac6e4d0a44f0400

SHA256
f23c7c958001a1eb56b4f4fee91d024f22eed3a3fd88a59eefff09a677ad7478

SHA512
2967289dc6eaa0673ee71718e3493cd36f4a27f9d1edbb68bf6d0cdc66c9373fea9b1bed1f1238013f064d4901666fb535deb84e541875a58d0cb07dd256177f

Download Submit
C:\Users\Admin\AppData\Local\77b3fa50-af59-4d1a-bc3a-0c6a019bad2f\build3.exe

Filesize
437B

MD5
6910426a598bc0b07dd6ca7c2faf5c22

SHA1
4304d65a08652b167453997e1464cc6ef034be23

SHA256
ebfef207462c29030b8a06068c8cbf1cfeae1304813b9cdbfa2d705b314bf692

SHA512
5e96757fa5daa336968aa07d5fe5525040a081a547dd6bad55bed4539ad76b3f96aabd38f461efdafa4a427963b2a3187cc40dfa60c74e6c6ddf738176381952

Download Submit
C:\Users\Admin\AppData\Local\bowsakkdestx.txt

Filesize
449B

MD5
caa078f0348cda98328127c142e3bfed

SHA1
e38274d642c806a3affcca8f7e37b61f591c47e6

SHA256
91faeb982f34313750a83d74c5464abe4e01357d1a7ea4253973509bc0e9d219

SHA512
2e6a5c482b5226079c6b4bd9a706537c372a3b43962f64be6bdd281e3217f963316ef0eba38164890bdf14af6558eb26605320487f0a0c841be9bb813c2ee5d6

Download Submit
memory/4348-2-0x0000000004990000-0x0000000004AAB000-memory.dmp

Filesize
1.1MB

Download
memory/4348-1-0x00000000048F0000-0x000000000498E000-memory.dmp

Filesize
632KB

Download
memory/4420-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-43-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-66-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-65-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-64-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-63-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4420-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5016-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5016-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5016-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5016-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5016-3-0x0000000000400000-0x0000000000537000-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