djvu | 8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6

General

Target

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
Size

779KB
MD5

b35348f4654893767a081b076f7becdf
SHA1

05b4ff88303a5e72ff43d5554c4628cec9e71bf8
SHA256

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6
SHA512

b634797706b5851ade5983aeac47f63723545e2d2c09f171871728a278f7cb72ab52d4eca73ff6648d6224a7c4da2ec261b4c6104fa2ab532334ddd5551b8e67
SSDEEP

12288:JHdymkH6+JdxrhhdF3wHogECWip4QBeXYeNaCA57tQL9ODxvZTTN85vaYkqC:JdkaCfrhhP3wi7rXYeNbaekDxRfO5zC

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 9 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2740-2-0x0000000005F10000-0x000000000602B000-memory.dmp	family_djvu
behavioral1/memory/4428-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4428-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4428-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4428-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4428-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/244-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/244-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/244-23-0x0000000000400000-0x0000000000537000-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

Processes:

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

868 icacls.exe

pid	process
868	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\deb4c570-b54f-4def-a814-430a8d3b16f9\\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe\" --AutoStart"	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.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.

Processes:

flow ioc

7 api.2ip.ua
6 api.2ip.ua

flow	ioc
7	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

description	pid	process	target process
PID 2740 set thread context of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 set thread context of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

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

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

968 244 WerFault.exe 8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

pid	pid_target	process	target process
968	244	WerFault.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

pid	process
4428	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
4428	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
"C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2740

C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
"C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4428

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\deb4c570-b54f-4def-a814-430a8d3b16f9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:868

C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
"C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2692

C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
"C:\Users\Admin\AppData\Local\Temp\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe" --Admin IsNotAutoStart IsNotTask
4⤵
PID:244

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 244 -s 576
5⤵
- Program crash
PID:968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 244 -ip 244
1⤵
PID:2216

Network

MITRE ATT&CK Matrix ATT&CK v13

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

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\deb4c570-b54f-4def-a814-430a8d3b16f9\8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
Filesize
779KB

MD5
b35348f4654893767a081b076f7becdf

SHA1
05b4ff88303a5e72ff43d5554c4628cec9e71bf8

SHA256
8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6

SHA512
b634797706b5851ade5983aeac47f63723545e2d2c09f171871728a278f7cb72ab52d4eca73ff6648d6224a7c4da2ec261b4c6104fa2ab532334ddd5551b8e67

Download Submit
memory/244-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/244-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/244-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2692-18-0x0000000004410000-0x00000000044B0000-memory.dmp

Filesize
640KB

Download
memory/2740-1-0x00000000046D0000-0x0000000004762000-memory.dmp

Filesize
584KB

Download
memory/2740-2-0x0000000005F10000-0x000000000602B000-memory.dmp

Filesize
1.1MB

Download
memory/4428-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4428-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4428-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4428-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4428-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2740 wrote to memory of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2740 wrote to memory of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2740 wrote to memory of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2740 wrote to memory of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2740 wrote to memory of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2740 wrote to memory of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2740 wrote to memory of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2740 wrote to memory of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2740 wrote to memory of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2740 wrote to memory of 4428	2740	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 4428 wrote to memory of 868	4428	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	icacls.exe
PID 4428 wrote to memory of 868	4428	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	icacls.exe
PID 4428 wrote to memory of 868	4428	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	icacls.exe
PID 4428 wrote to memory of 2692	4428	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 4428 wrote to memory of 2692	4428	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 4428 wrote to memory of 2692	4428	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 wrote to memory of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 wrote to memory of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 wrote to memory of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 wrote to memory of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 wrote to memory of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 wrote to memory of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 wrote to memory of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 wrote to memory of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 wrote to memory of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe
PID 2692 wrote to memory of 244	2692	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe	8e53393db26258fb917fd570861070420d31148c2826dcdbed52ce326c2d5ff6.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads