djvu | b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8

General

Target
b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe
Size 730KB
Sample210929-jm526aebc7
SHA256 b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8
MD5 4e6afe8c311af44e888e5f4cc1c8e1c0
SHA1 be358e02b328bf52276a09938fd777d513eada77
SHA512 6b509010de683f240b536397f76d4ac2a39676387cf5afb5cd85529c1d6ed4d14ff1a501b8378eaea9dfb4649d3c05154ce0620fcd601d7e0b3ef77e2600177d
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Signatures

Detected Djvu ransomware 6 IoCs

resource	yara_rule
behavioral2/memory/992-114-0x00000000040A0000-0x00000000041BB000-memory.dmp	family_djvu
behavioral2/memory/680-115-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/680-116-0x0000000000424141-mapping.dmp	family_djvu
behavioral2/memory/680-117-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2144-122-0x0000000000424141-mapping.dmp	family_djvu
behavioral2/memory/2144-127-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1492	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\\c9c1d06f-7530-404e-a8d1-c7d7fc163020\\b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe\" --AutoStart"	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.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
2	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 992 set thread context of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 1676 set thread context of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72

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

System Information Discovery
T1082

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	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
680	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe
680	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe
2144	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe
2144	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 992 wrote to memory of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 992 wrote to memory of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 992 wrote to memory of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 992 wrote to memory of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 992 wrote to memory of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 992 wrote to memory of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 992 wrote to memory of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 992 wrote to memory of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 992 wrote to memory of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 992 wrote to memory of 680	992	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	68
PID 680 wrote to memory of 1492	680	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	69
PID 680 wrote to memory of 1492	680	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	69
PID 680 wrote to memory of 1492	680	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	69
PID 680 wrote to memory of 1676	680	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	70
PID 680 wrote to memory of 1676	680	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	70
PID 680 wrote to memory of 1676	680	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	70
PID 1676 wrote to memory of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72
PID 1676 wrote to memory of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72
PID 1676 wrote to memory of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72
PID 1676 wrote to memory of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72
PID 1676 wrote to memory of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72
PID 1676 wrote to memory of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72
PID 1676 wrote to memory of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72
PID 1676 wrote to memory of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72
PID 1676 wrote to memory of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72
PID 1676 wrote to memory of 2144	1676	b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe	72

C:\Users\Admin\AppData\Local\Temp\b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe
"C:\Users\Admin\AppData\Local\Temp\b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:992
- C:\Users\Admin\AppData\Local\Temp\b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe
  "C:\Users\Admin\AppData\Local\Temp\b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe"
  2⤵
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:680
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c9c1d06f-7530-404e-a8d1-c7d7fc163020" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1492
- - C:\Users\Admin\AppData\Local\Temp\b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe
    "C:\Users\Admin\AppData\Local\Temp\b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1676
  - - C:\Users\Admin\AppData\Local\Temp\b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe
      "C:\Users\Admin\AppData\Local\Temp\b2cfd5cd948b40e9152e4dd8abe0aa346ba030afae6974b1cb598be87bafe2a8.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2144

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

1

T1222

Install Root Certificate

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/680-117-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/680-115-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/992-114-0x00000000040A0000-0x00000000041BB000-memory.dmp

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memory/2144-127-0x0000000000400000-0x0000000000537000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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