djvu | 83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc

General

Target

83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
Size

787KB
MD5

5b46aefda82f08b2bd5748107097b629
SHA1

41edb075dc4afe2ecfbdbe14f77f3d38bbf2eda1
SHA256

83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc
SHA512

dba798a76425e59ad54a5a4585836ff50b299941c8bb6e85767518f0d396acb54b849110cddce2b54ec0efd99399cacf09b473c5fad502cd935a69cdf3e74437
SSDEEP

24576:o9uyfopPOGTgM3t0xO+2CfTbqPvEmifU/KsIv:afoZOGNjiXqPvEhsSsE

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.bgzq
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 17 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1184-2-0x0000000005D80000-0x0000000005E9B000-memory.dmp	family_djvu
behavioral1/memory/3684-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3684-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3684-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3684-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3684-13-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3712-29-0x0000000000400000-0x0000000000537000-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:

83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

2932 icacls.exe

pid	process
2932	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3726321484-1950364574-433157660-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a8e42720-3102-40ba-b7e4-23e1c36ea15e\\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe\" --AutoStart"	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.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

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

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

description	pid	process	target process
PID 1184 set thread context of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 set thread context of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

pid	process
3684	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
3684	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
3712	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
3712	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
"C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1184

C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
"C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3684

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\a8e42720-3102-40ba-b7e4-23e1c36ea15e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:2932

C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
"C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1988

C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
"C:\Users\Admin\AppData\Local\Temp\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3712

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\a8e42720-3102-40ba-b7e4-23e1c36ea15e\83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
Filesize
787KB

MD5
5b46aefda82f08b2bd5748107097b629

SHA1
41edb075dc4afe2ecfbdbe14f77f3d38bbf2eda1

SHA256
83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc

SHA512
dba798a76425e59ad54a5a4585836ff50b299941c8bb6e85767518f0d396acb54b849110cddce2b54ec0efd99399cacf09b473c5fad502cd935a69cdf3e74437

Download Submit
memory/1184-1-0x00000000042C0000-0x000000000435B000-memory.dmp

Filesize
620KB

Download
memory/1184-2-0x0000000005D80000-0x0000000005E9B000-memory.dmp

Filesize
1.1MB

Download
memory/3684-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3684-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3684-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3684-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3684-13-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-16-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-18-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3712-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 1184 wrote to memory of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1184 wrote to memory of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1184 wrote to memory of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1184 wrote to memory of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1184 wrote to memory of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1184 wrote to memory of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1184 wrote to memory of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1184 wrote to memory of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1184 wrote to memory of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1184 wrote to memory of 3684	1184	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 3684 wrote to memory of 2932	3684	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	icacls.exe
PID 3684 wrote to memory of 2932	3684	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	icacls.exe
PID 3684 wrote to memory of 2932	3684	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	icacls.exe
PID 3684 wrote to memory of 1988	3684	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 3684 wrote to memory of 1988	3684	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 3684 wrote to memory of 1988	3684	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 wrote to memory of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 wrote to memory of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 wrote to memory of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 wrote to memory of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 wrote to memory of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 wrote to memory of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 wrote to memory of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 wrote to memory of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 wrote to memory of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe
PID 1988 wrote to memory of 3712	1988	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe	83baa55bb989c1aadf3bbd7afb0228128d0116ffe1b784b2e7f7543cd58507bc.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads