djvu | 11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c

General

Target

11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe
Size

744KB
MD5

b8aebc100a274c95d2c92c50f721d12e
SHA1

c5d43041dd429e8af06dc3c6302cca915ff77cc0
SHA256

11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c
SHA512

f746f6606befa5b5c510d99f4815e2dc26b45701ee32eea14f4498542216f112000d2e35a8ac1a727cffa21abd91f7c49be0b9d5b654a8f5311096e7ba386d50
SSDEEP

12288:5VPXOr5lH8F6Ls1bAJW5axYRy9bC9ooXo6Xiak3OUiPMkdUv+:HPSKbJ5axYYgN7il+UZaUv+

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes

extension
.qehu
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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 10 IoCs

resource	yara_rule
behavioral1/memory/4780-2-0x0000000002520000-0x000000000263B000-memory.dmp	family_djvu
behavioral1/memory/2440-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2440-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2440-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2440-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2440-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2440-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2116-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2116-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2116-26-0x0000000000400000-0x0000000000537000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2108	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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4bef4b49-8e77-40c2-9ffa-3de77db06505\\11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe\" --AutoStart"	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.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
26	api.2ip.ua
34	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4780 set thread context of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 3336 set thread context of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104

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
4244	2116	WerFault.exe	104

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2440	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe
2440	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4780 wrote to memory of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 4780 wrote to memory of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 4780 wrote to memory of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 4780 wrote to memory of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 4780 wrote to memory of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 4780 wrote to memory of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 4780 wrote to memory of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 4780 wrote to memory of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 4780 wrote to memory of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 4780 wrote to memory of 2440	4780	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	90
PID 2440 wrote to memory of 2108	2440	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	95
PID 2440 wrote to memory of 2108	2440	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	95
PID 2440 wrote to memory of 2108	2440	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	95
PID 2440 wrote to memory of 3336	2440	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	102
PID 2440 wrote to memory of 3336	2440	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	102
PID 2440 wrote to memory of 3336	2440	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	102
PID 3336 wrote to memory of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104
PID 3336 wrote to memory of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104
PID 3336 wrote to memory of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104
PID 3336 wrote to memory of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104
PID 3336 wrote to memory of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104
PID 3336 wrote to memory of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104
PID 3336 wrote to memory of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104
PID 3336 wrote to memory of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104
PID 3336 wrote to memory of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104
PID 3336 wrote to memory of 2116	3336	11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe	104

C:\Users\Admin\AppData\Local\Temp\11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe
"C:\Users\Admin\AppData\Local\Temp\11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4780
- C:\Users\Admin\AppData\Local\Temp\11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe
  "C:\Users\Admin\AppData\Local\Temp\11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2440
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4bef4b49-8e77-40c2-9ffa-3de77db06505" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2108
- - C:\Users\Admin\AppData\Local\Temp\11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe
    "C:\Users\Admin\AppData\Local\Temp\11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3336
  - - C:\Users\Admin\AppData\Local\Temp\11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe
      "C:\Users\Admin\AppData\Local\Temp\11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:2116
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2116 -s 568
        5⤵
        Program crash
        
        PID:4244

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3672 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:3140

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2116 -ip 2116
1⤵
PID:1408

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\4bef4b49-8e77-40c2-9ffa-3de77db06505\11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c.exe

Filesize
744KB

MD5
b8aebc100a274c95d2c92c50f721d12e

SHA1
c5d43041dd429e8af06dc3c6302cca915ff77cc0

SHA256
11787248543667fdcd0be279b136dcea5485b1bdffde066975921a268a1e675c

SHA512
f746f6606befa5b5c510d99f4815e2dc26b45701ee32eea14f4498542216f112000d2e35a8ac1a727cffa21abd91f7c49be0b9d5b654a8f5311096e7ba386d50

Download Submit
memory/2116-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2116-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2116-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2440-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2440-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2440-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2440-18-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2440-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2440-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3336-23-0x0000000000400000-0x0000000000812000-memory.dmp

Filesize
4.1MB

Download
memory/3336-29-0x0000000000400000-0x0000000000812000-memory.dmp

Filesize
4.1MB

Download
memory/4780-1-0x0000000002480000-0x000000000251D000-memory.dmp

Filesize
628KB

Download
memory/4780-2-0x0000000002520000-0x000000000263B000-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