f1e52af7310c199ec5d44f16b37b6e4a7eebb3a55de5db292111440fa7d0da47

Analysis

max time kernel
84s
max time network
134s
platform
windows10_x64
resource
win10v20210408
submitted
27-05-2021 15:32

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General

Target

PDFViewer.exe
Size

564KB
MD5

0b9f0463a2d36d53505c4911b74c8f08
SHA1

d5c929cbd199dadaa879fb9368103b11fb68e7fd
SHA256

f1e52af7310c199ec5d44f16b37b6e4a7eebb3a55de5db292111440fa7d0da47
SHA512

796e923ae65df8e652387628dccff85d2bfb793c99386aec34c2c6db3482d0bf97fd5586a72b4732b4bef2fe6aabd8e912b5b390068dd590d5d1a57d93f6d924

Score

8^/10

upx

Malware Config

Signatures

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1512-119-0x0000000000400000-0x00000000004F6000-memory.dmp	upx

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1440 set thread context of 1512	1440	PDFViewer.exe	77

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1440	PDFViewer.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1512	PDFViewer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1512	PDFViewer.exe
Token: SeCreatePagefilePrivilege	1512	PDFViewer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1440	PDFViewer.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1440 wrote to memory of 1512	1440	PDFViewer.exe	77
PID 1440 wrote to memory of 1512	1440	PDFViewer.exe	77
PID 1440 wrote to memory of 1512	1440	PDFViewer.exe	77
PID 1440 wrote to memory of 1512	1440	PDFViewer.exe	77
PID 1512 wrote to memory of 844	1512	PDFViewer.exe	79
PID 1512 wrote to memory of 844	1512	PDFViewer.exe	79
PID 1512 wrote to memory of 844	1512	PDFViewer.exe	79

C:\Users\Admin\AppData\Local\Temp\PDFViewer.exe
"C:\Users\Admin\AppData\Local\Temp\PDFViewer.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1440
- C:\Users\Admin\AppData\Local\Temp\PDFViewer.exe
  "C:\Users\Admin\AppData\Local\Temp\PDFViewer.exe"
  2⤵
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1512
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\CRBhLBbxpcaKFFVj.bat" "
    3⤵
    PID:844

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1440-116-0x0000000000A50000-0x0000000000A51000-memory.dmp

Filesize
4KB

Download
memory/1440-118-0x0000000000A60000-0x0000000000A67000-memory.dmp

Filesize
28KB

Download
memory/1512-119-0x0000000000400000-0x00000000004F6000-memory.dmp

Filesize
984KB

Download
memory/1512-120-0x00000000005B0000-0x00000000006FA000-memory.dmp

Filesize
1.3MB

Download