19a174d9b6bf71c97169f88c467fe07bf16f307687c30ca17c55f10fdd6c5f7b

General

Target

Inquiry Items~pdf.exe
Size

859KB
MD5

befba058f69c91a13b001f3d15efa262
SHA1

aeebe9b13b160bcb77bca46e5acefbdf214f9e5f
SHA256

e469882fa707c3f2f85c8bdd5fe250434f3fa5169ee71f8132dce99296b99629
SHA512

13a8df597d4ddf3762731e1c9226845e33ef15595c1e9d6152edf1abfabf5a9695f911a9475f900f1862ba50009c208be613679f9ed51e4a1e698f8eab0e779a

Score

8^/10

evasion persistence

Malware Config

Signatures

Disables RegEdit via registry modification
evasion
Disables Task Manager via registry modification
evasion

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Inquiry Items~pdf.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ybFan = "C:\\TWJYXOUL\\ybFanj\\ybFanjLno.vbs"	Inquiry Items~pdf.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

Inquiry Items~pdf.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Inquiry Items~pdf.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	Inquiry Items~pdf.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Inquiry Items~pdf.exe

description pid process target process

PID 2432 set thread context of 2336 2432 Inquiry Items~pdf.exe InstallUtil.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

5056 REG.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

InstallUtil.exe

pid process

2336 InstallUtil.exe
2336 InstallUtil.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

Inquiry Items~pdf.exe

pid process

2432 Inquiry Items~pdf.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

InstallUtil.exe

description pid process

Token: SeDebugPrivilege 2336 InstallUtil.exe

description	pid	process	target process
PID 2432 set thread context of 2336	2432	Inquiry Items~pdf.exe	InstallUtil.exe

pid	process
5056	REG.exe

pid	process
2336	InstallUtil.exe
2336	InstallUtil.exe

pid	process
2432	Inquiry Items~pdf.exe

description	pid	process
Token: SeDebugPrivilege	2336	InstallUtil.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

Inquiry Items~pdf.exeInstallUtil.exe

description	pid	process	target process
PID 2432 wrote to memory of 2336	2432	Inquiry Items~pdf.exe	InstallUtil.exe
PID 2432 wrote to memory of 2336	2432	Inquiry Items~pdf.exe	InstallUtil.exe
PID 2432 wrote to memory of 2336	2432	Inquiry Items~pdf.exe	InstallUtil.exe
PID 2432 wrote to memory of 2336	2432	Inquiry Items~pdf.exe	InstallUtil.exe
PID 2336 wrote to memory of 5056	2336	InstallUtil.exe	REG.exe
PID 2336 wrote to memory of 5056	2336	InstallUtil.exe	REG.exe
PID 2336 wrote to memory of 5056	2336	InstallUtil.exe	REG.exe

C:\Users\Admin\AppData\Local\Temp\Inquiry Items~pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Inquiry Items~pdf.exe"
1⤵
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2432

C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
"C:\Windows\\Microsoft.NET\\Framework\\v2.0.50727\\InstallUtil.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2336

C:\Windows\SysWOW64\REG.exe
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
3⤵
- Modifies registry key
PID:5056

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2336-132-0x0000000000000000-mapping.dmp

Download
memory/2336-134-0x0000000072850000-0x0000000072E01000-memory.dmp

Filesize
5.7MB

Download
memory/2432-130-0x00000000005F0000-0x00000000006CC000-memory.dmp

Filesize
880KB

Download
memory/2432-131-0x00000000056F0000-0x0000000005C94000-memory.dmp

Filesize
5.6MB

Download
memory/2432-133-0x0000000002B10000-0x0000000002B13000-memory.dmp

Filesize
12KB

Download
memory/5056-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads