djvu | bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2

General

Target

bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Size

766KB
MD5

2cb8c190f4cc23501bc6965d9d762977
SHA1

3b6f667d28eec165a2ccfaed4fb3cf87084b06ed
SHA256

bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2
SHA512

295dee006e2d991ffc6b8016a02a2e171973552527bfa3c040f91aabb46c2233c62dbf41dec0d97db61ac1f145c875f79a3bfa28c09b74c1ed23016abd729697
SSDEEP

12288:nKDiXNmHNpcGWH69SIW5JBvOwcMBl4tT5jVXctOpctHni7LEwvn:nMiXNKNpM6jW5JDcIit+OpAHUEw/

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.held
offline_id
vyhLHcV0DMKjS0CgDoJGF0yJ299laBK7lZQM9Tt1
payload_url
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 10 IoCs

resource	yara_rule
behavioral2/memory/4552-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4552-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4552-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4552-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/844-2-0x00000000026E0000-0x00000000027FB000-memory.dmp	family_djvu
behavioral2/memory/4552-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3408-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3408-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3408-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2292-28-0x0000000000400000-0x0000000000898000-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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4048	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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ab4bd92e-d653-40c6-8cca-11abcfa1ac89\\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe\" --AutoStart"	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.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
6	api.2ip.ua
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 844 set thread context of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 2292 set thread context of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86

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
3316	3408	WerFault.exe

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	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4552	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
4552	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 844 wrote to memory of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 844 wrote to memory of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 844 wrote to memory of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 844 wrote to memory of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 844 wrote to memory of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 844 wrote to memory of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 844 wrote to memory of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 844 wrote to memory of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 844 wrote to memory of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 844 wrote to memory of 4552	844	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	82
PID 4552 wrote to memory of 4048	4552	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	83
PID 4552 wrote to memory of 4048	4552	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	83
PID 4552 wrote to memory of 4048	4552	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	83
PID 4552 wrote to memory of 2292	4552	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	84
PID 4552 wrote to memory of 2292	4552	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	84
PID 4552 wrote to memory of 2292	4552	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	84
PID 2292 wrote to memory of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86
PID 2292 wrote to memory of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86
PID 2292 wrote to memory of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86
PID 2292 wrote to memory of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86
PID 2292 wrote to memory of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86
PID 2292 wrote to memory of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86
PID 2292 wrote to memory of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86
PID 2292 wrote to memory of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86
PID 2292 wrote to memory of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86
PID 2292 wrote to memory of 3408	2292	bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe	86

C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
"C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:844
- C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
  "C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.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:4552
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ab4bd92e-d653-40c6-8cca-11abcfa1ac89" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4048
- - C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
    "C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2292
  - - C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
      "C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      PID:3408
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3408 -s 568
        5⤵
        Program crash
        
        PID:3316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3408 -ip 3408
1⤵
PID:4512

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\Local\ab4bd92e-d653-40c6-8cca-11abcfa1ac89\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe

Filesize
766KB

MD5
2cb8c190f4cc23501bc6965d9d762977

SHA1
3b6f667d28eec165a2ccfaed4fb3cf87084b06ed

SHA256
bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2

SHA512
295dee006e2d991ffc6b8016a02a2e171973552527bfa3c040f91aabb46c2233c62dbf41dec0d97db61ac1f145c875f79a3bfa28c09b74c1ed23016abd729697

Download Submit
memory/844-2-0x00000000026E0000-0x00000000027FB000-memory.dmp

Filesize
1.1MB

Download
memory/844-1-0x0000000002630000-0x00000000026D1000-memory.dmp

Filesize
644KB

Download
memory/2292-25-0x0000000000400000-0x0000000000898000-memory.dmp

Filesize
4.6MB

Download
memory/2292-21-0x0000000000400000-0x0000000000898000-memory.dmp

Filesize
4.6MB

Download
memory/2292-28-0x0000000000400000-0x0000000000898000-memory.dmp

Filesize
4.6MB

Download
memory/3408-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3408-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3408-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4552-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4552-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4552-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4552-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4552-4-0x0000000000400000-0x0000000000537000-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