djvu | f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde

Analysis

max time kernel
153s
max time network
151s
platform
windows10_x64
resource
win10v20210408
submitted
22/09/2021, 13:21

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General

Target
f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
Size 746KB
Sample210922-qlqpeafdaj
SHA256 f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde
MD5 ec6707a7b36ba6ac3b2a0c8361fbf84d
SHA1 f2f906efa140e49f2c13885bfdb27ddcb844f3dd
SHA512 793d1e0c1e792b039822d4b8dd5d76532780c3ef5b8c3d375a20667d1ae70bcdb617da0de051c672f111cad8b64164ae7ae9560aef48a6f874598b3084bce386
MD5 SHA1 SHA512

Score

10^/10

djvu vidar 517 discovery persistence ransomware stealer suricata

Malware Config

Extracted

Family

vidar

Version

40.8

Botnet

https://pavlovoler.tumblr.com/

Attributes

profile_id
517

Signatures

Detected Djvu ransomware 6 IoCs

resource	yara_rule
behavioral2/memory/604-114-0x0000000004B20000-0x0000000004C3B000-memory.dmp	family_djvu
behavioral2/memory/672-115-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/672-116-0x0000000000424141-mapping.dmp	family_djvu
behavioral2/memory/672-117-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2292-122-0x0000000000424141-mapping.dmp	family_djvu
behavioral2/memory/2292-127-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata

Vidar Stealer 4 IoCs

stealer

resource	yara_rule
behavioral2/memory/820-131-0x0000000000400000-0x00000000004D7000-memory.dmp	family_vidar
behavioral2/memory/820-132-0x00000000004A033D-mapping.dmp	family_vidar
behavioral2/memory/820-135-0x0000000000400000-0x00000000004D7000-memory.dmp	family_vidar
behavioral2/memory/1936-134-0x0000000000AA0000-0x0000000000B74000-memory.dmp	family_vidar

Downloads MZ/PE file

Executes dropped EXE 3 IoCs

pid	Process
1936	build2.exe
820	build2.exe
3480	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1220	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7a411baf-d480-48fc-a652-fd4a3af56899\\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe\" --AutoStart"	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe

Looks up external IP address via web service 3 IoCs

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

flow	ioc
1	api.2ip.ua
3	api.2ip.ua
10	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 604 set thread context of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 1408 set thread context of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 1936 set thread context of 820	1936	build2.exe	76

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1748	820	WerFault.exe	76

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
672	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
672	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
2292	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
2292	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe
1748	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	1748	WerFault.exe
Token: SeBackupPrivilege	1748	WerFault.exe
Token: SeDebugPrivilege	1748	WerFault.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 604 wrote to memory of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 604 wrote to memory of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 604 wrote to memory of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 604 wrote to memory of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 604 wrote to memory of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 604 wrote to memory of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 604 wrote to memory of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 604 wrote to memory of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 604 wrote to memory of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 604 wrote to memory of 672	604	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	68
PID 672 wrote to memory of 1220	672	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	69
PID 672 wrote to memory of 1220	672	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	69
PID 672 wrote to memory of 1220	672	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	69
PID 672 wrote to memory of 1408	672	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	70
PID 672 wrote to memory of 1408	672	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	70
PID 672 wrote to memory of 1408	672	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	70
PID 1408 wrote to memory of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 1408 wrote to memory of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 1408 wrote to memory of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 1408 wrote to memory of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 1408 wrote to memory of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 1408 wrote to memory of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 1408 wrote to memory of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 1408 wrote to memory of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 1408 wrote to memory of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 1408 wrote to memory of 2292	1408	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	73
PID 2292 wrote to memory of 1936	2292	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	75
PID 2292 wrote to memory of 1936	2292	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	75
PID 2292 wrote to memory of 1936	2292	f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe	75
PID 1936 wrote to memory of 820	1936	build2.exe	76
PID 1936 wrote to memory of 820	1936	build2.exe	76
PID 1936 wrote to memory of 820	1936	build2.exe	76
PID 1936 wrote to memory of 820	1936	build2.exe	76
PID 1936 wrote to memory of 820	1936	build2.exe	76
PID 1936 wrote to memory of 820	1936	build2.exe	76
PID 1936 wrote to memory of 820	1936	build2.exe	76
PID 1936 wrote to memory of 820	1936	build2.exe	76

C:\Users\Admin\AppData\Local\Temp\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
"C:\Users\Admin\AppData\Local\Temp\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:604
- C:\Users\Admin\AppData\Local\Temp\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
  "C:\Users\Admin\AppData\Local\Temp\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe"
  2⤵
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:672
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\7a411baf-d480-48fc-a652-fd4a3af56899" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1220
- - C:\Users\Admin\AppData\Local\Temp\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
    "C:\Users\Admin\AppData\Local\Temp\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1408
  - - C:\Users\Admin\AppData\Local\Temp\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
      "C:\Users\Admin\AppData\Local\Temp\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:2292
    - - C:\Users\Admin\AppData\Local\9f20e045-6e9a-4402-82c1-82ab85a002f5\build2.exe
        
        "C:\Users\Admin\AppData\Local\9f20e045-6e9a-4402-82c1-82ab85a002f5\build2.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:1936
      - C:\Users\Admin\AppData\Local\9f20e045-6e9a-4402-82c1-82ab85a002f5\build2.exe
        
        "C:\Users\Admin\AppData\Local\9f20e045-6e9a-4402-82c1-82ab85a002f5\build2.exe"
        6⤵
        Executes dropped EXE
        
        PID:820
        
        C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 820 -s 1048
        7⤵
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1748

C:\Users\Admin\AppData\Local\7a411baf-d480-48fc-a652-fd4a3af56899\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe
C:\Users\Admin\AppData\Local\7a411baf-d480-48fc-a652-fd4a3af56899\f040a5e3d2c865772e4f8b1fda5ff3437fb0a35924fd260fc76732398e262dde.exe --Task
1⤵
- Executes dropped EXE
PID:3480

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/604-114-0x0000000004B20000-0x0000000004C3B000-memory.dmp

Download

memory/672-117-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/672-115-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/820-131-0x0000000000400000-0x00000000004D7000-memory.dmp

Download

memory/820-135-0x0000000000400000-0x00000000004D7000-memory.dmp

Download

memory/1936-134-0x0000000000AA0000-0x0000000000B74000-memory.dmp

Download

memory/2292-127-0x0000000000400000-0x0000000000537000-memory.dmp

Download