djvu | dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e

General

Target

dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe
Size

781KB
MD5

61081b6e5e7a3818727c20e65f599ce1
SHA1

d9fda2e36ae8ba44ea5eb91cfaf70b0809371eed
SHA256

dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e
SHA512

084186f052f0d8536ec278fe17bb3f5842a3b48a8877106004843608e3fb0a8c171b9fea181318e52ddca874df1d1fffa59131d9bcf3279262f1c399161415be
SSDEEP

12288:YRdphh2jXdWNHdksVf3wggH0VNseFDRFzIrgGfFkwwdDMv/Jrwm0maFWC:YRxWa+ApgcxFDRFSgGfbxv/JrwmEW

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.ooza
offline_id
dhL6XvokZotUzL67Na5WfNIBufODsob7eYc3mzt1
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 10 IoCs

resource	yara_rule
behavioral2/memory/3104-2-0x00000000026A0000-0x00000000027BB000-memory.dmp	family_djvu
behavioral2/memory/2396-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2396-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2396-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2396-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2396-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2396-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-32-0x0000000000400000-0x0000000000537000-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-1-5-21-1045988481-1457812719-2617974652-1000\Control Panel\International\Geo\Nation	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4536	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-1-5-21-1045988481-1457812719-2617974652-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\341b39c2-f0e7-4c0e-a88e-9db7aeb38909\\dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe\" --AutoStart"	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
27	api.2ip.ua
28	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3104 set thread context of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 1640 set thread context of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2744	2240	WerFault.exe	90

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2396	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe
2396	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3104 wrote to memory of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 3104 wrote to memory of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 3104 wrote to memory of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 3104 wrote to memory of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 3104 wrote to memory of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 3104 wrote to memory of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 3104 wrote to memory of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 3104 wrote to memory of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 3104 wrote to memory of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 3104 wrote to memory of 2396	3104	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	82
PID 2396 wrote to memory of 4536	2396	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	84
PID 2396 wrote to memory of 4536	2396	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	84
PID 2396 wrote to memory of 4536	2396	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	84
PID 2396 wrote to memory of 1640	2396	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	87
PID 2396 wrote to memory of 1640	2396	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	87
PID 2396 wrote to memory of 1640	2396	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	87
PID 1640 wrote to memory of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90
PID 1640 wrote to memory of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90
PID 1640 wrote to memory of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90
PID 1640 wrote to memory of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90
PID 1640 wrote to memory of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90
PID 1640 wrote to memory of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90
PID 1640 wrote to memory of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90
PID 1640 wrote to memory of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90
PID 1640 wrote to memory of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90
PID 1640 wrote to memory of 2240	1640	dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe	90

C:\Users\Admin\AppData\Local\Temp\dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe
"C:\Users\Admin\AppData\Local\Temp\dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3104
- C:\Users\Admin\AppData\Local\Temp\dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2396
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\341b39c2-f0e7-4c0e-a88e-9db7aeb38909" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4536
- - C:\Users\Admin\AppData\Local\Temp\dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1640
  - - C:\Users\Admin\AppData\Local\Temp\dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe
      "C:\Users\Admin\AppData\Local\Temp\dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:2240
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2240 -s 568
        5⤵
        Program crash
        
        PID:2744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2240 -ip 2240
1⤵
PID:2436

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\341b39c2-f0e7-4c0e-a88e-9db7aeb38909\dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e_JC.exe

Filesize
781KB

MD5
61081b6e5e7a3818727c20e65f599ce1

SHA1
d9fda2e36ae8ba44ea5eb91cfaf70b0809371eed

SHA256
dfcaad1adf6a00fa5a14f152d293ab6bd4afe4a661ad41cca2ed07caba1a903e

SHA512
084186f052f0d8536ec278fe17bb3f5842a3b48a8877106004843608e3fb0a8c171b9fea181318e52ddca874df1d1fffa59131d9bcf3279262f1c399161415be

Download Submit
memory/1640-27-0x0000000002430000-0x00000000024C6000-memory.dmp

Filesize
600KB

Download
memory/2240-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2240-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2240-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2396-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2396-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2396-18-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2396-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2396-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2396-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3104-1-0x0000000002600000-0x0000000002697000-memory.dmp

Filesize
604KB

Download
memory/3104-3-0x0000000002600000-0x0000000002697000-memory.dmp

Filesize
604KB

Download
memory/3104-2-0x00000000026A0000-0x00000000027BB000-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