d2cd99f2ffcad6cc11d3798ad269c5a711ac9a9bd445e940df99b65d8b095d4b

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
14/07/2024, 02:01

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General

Target

RunDict.exe
Size

361KB
MD5

ad2960fde1e77cb9f59ba8ebde31b73a
SHA1

93bffbd719f2017beece3dcabe2e5a5b093d7844
SHA256

791597b08e6d3f2358ce6ceaab6abc94c030da7ee9b22baf594c58f8d1f6b040
SHA512

00369da06d7e22104821cce62e1398a1625acb8f0d21b28d9b507ba092c8069314a810558c67d9762f0708fae77673e253153c92569acef7a1c30f00a6e7a7ac
SSDEEP

6144:ueoo4DrmbppQbNWDf79h5L0lvfW1NGu/HhQ1UCDICJlhM8:2Dr2ppQMcvfW3DHhQ1J5hM8

Score

7^/10

Malware Config

Signatures

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\Control Panel\International\Geo\Nation	RunDict.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\YodaoDict.api	YodaoDict.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\YodaoDict.api	YodaoDict.exe

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 4 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	YodaoDict.exe
Key created	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\Software\Microsoft\Internet Explorer\IESettingSync	YodaoDict.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\SOFTWARE\Microsoft\Internet Explorer\IESettingSync\SlowSettingTypesChanged = "2"	YodaoDict.exe
Key created	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	YodaoDict.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: 33	520	YodaoDict.exe
Token: SeIncBasePriorityPrivilege	520	YodaoDict.exe
Token: 33	520	YodaoDict.exe
Token: SeIncBasePriorityPrivilege	520	YodaoDict.exe
Token: 33	520	YodaoDict.exe
Token: SeIncBasePriorityPrivilege	520	YodaoDict.exe
Token: 33	520	YodaoDict.exe
Token: SeIncBasePriorityPrivilege	520	YodaoDict.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe
3428	YoudaoEH.exe
3428	YoudaoEH.exe
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe
520	YodaoDict.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 520	2128	RunDict.exe	85
PID 2128 wrote to memory of 520	2128	RunDict.exe	85
PID 2128 wrote to memory of 520	2128	RunDict.exe	85
PID 520 wrote to memory of 312	520	YodaoDict.exe	86
PID 520 wrote to memory of 312	520	YodaoDict.exe	86
PID 520 wrote to memory of 3428	520	YodaoDict.exe	88
PID 520 wrote to memory of 3428	520	YodaoDict.exe	88

C:\Users\Admin\AppData\Local\Temp\RunDict.exe
"C:\Users\Admin\AppData\Local\Temp\RunDict.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2128
- C:\Users\Admin\AppData\Local\Temp\YodaoDict.exe
  "C:\Users\Admin\AppData\Local\Temp\YodaoDict.exe" start
  2⤵
  - Drops file in Program Files directory
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:520
- - C:\Windows\system32\pcaui.exe
    "C:\Windows\system32\pcaui.exe" -g {11111111-1111-1111-1111-111111111111} -x {5a82a30e-5da6-492d-8bb8-58d77df8d829} -a "YoudaoDictionary" -v "NetEase" -s "This app can't run because it causes security or performance issues on Windows. A new version may be available. Check with your software provider for an updated version that runs on this version of Windows." -n 1 -f 0 -k 0 -e "C:\Users\Admin\AppData\Local\Temp\YodaoDict.exe"
    3⤵
    PID:312
- - C:\Users\Admin\AppData\Local\Temp\YoudaoEH.exe
    "C:\Users\Admin\AppData\Local\Temp\YoudaoEH.exe"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:3428

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Youdao\DeskDict\ddupdate\dictupdate.xml

Filesize
11KB

MD5
7b51ce7a7e72ceb992f9066158e0d7fb

SHA1
f1a4f8d7e315f38155c9700156a86a238239702c

SHA256
464a31f7fc09e7c700d8ba701f7fd85fd9e308e8d344e90ba22d5053ca4fa82b

SHA512
c895b73dc37276b12b1ee7bee8c107bc4784a8d569cba5d340c45d17fc2291dc88fda3398545b0d6a3c4bc23ed052d5741152ec9cc9c798b85efe5ec6ed00e9b

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C:\ProgramData\Youdao\DeskDict\ddupdate\update_des.xml

Filesize
4KB

MD5
77fc5119820bb7fdab9e196bf9c68a61

SHA1
e83de81269c6cc321e3123e60e7d339d3a5b6cfe

SHA256
1748c8531cd0da6bda10f4177d17dc283a6716458535ba9a335b6d3bb2846428

SHA512
25209a3d3fc2ecdbf78d85149c4394ee25005a895b12b4ef832f9587722ef17dd78b8f6ebeeb9813a817806e6e27fd3f20f96c7c6f7364ead4c9ea6dfba63bf1

Download Submit