25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc

General

Target

25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe
Size

574KB
MD5

6eff221e20283b648d9d137689afa654
SHA1

cdcf71e283efa9252a3ed4d72f204412ae6f36d6
SHA256

25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc
SHA512

e6f87081330b729cbcaf2ea3801749b5dec83ed685128b6a4215d2d0c62c7fecc7eb5144282e13bf913c9ca23088364d63d6b899a071533e6f0fde7f4f3b91c9
SSDEEP

12288:hQpZZI8T70/Vkkf/CDT8olHgUpvvRfbitUtasiT8Yky0RxPe/:SEk8VkyqsgHgUpvtOhkyWde/

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

caidaotx.exe

pid process

692 caidaotx.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\caidaotx.exe	upx
\Users\Admin\AppData\Local\Temp\caidaotx.exe	upx
C:\Users\Admin\AppData\Local\Temp\caidaotx.exe	upx
behavioral1/memory/692-62-0x0000000000400000-0x00000000004B3000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\caidaotx.exe	upx
behavioral1/memory/692-66-0x0000000000400000-0x00000000004B3000-memory.dmp	upx

Loads dropped DLL 2 IoCs

Processes:

25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe

pid	process
1168	25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe
1168	25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 24 IoCs

adware spyware

Modify Registry

T1112

Processes:

iexplore.execaidaotx.exeIEXPLORE.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\TypedURLs	caidaotx.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000000000001000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{86E43181-6E7B-11ED-8E3C-5E5304B417C2} = "0"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe

Suspicious use of FindShellTrayWindow 64 IoCs

Processes:

caidaotx.exeiexplore.exe

pid	process
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
1636	iexplore.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
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692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe

Suspicious use of SendNotifyMessage 64 IoCs

Processes:

caidaotx.exe

pid	process
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
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692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
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692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
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692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe

Suspicious use of SetWindowsHookEx 13 IoCs

Processes:

25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.execaidaotx.exeiexplore.exeIEXPLORE.EXE

pid	process
1168	25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe
1168	25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
692	caidaotx.exe
1636	iexplore.exe
1636	iexplore.exe
1612	IEXPLORE.EXE
1612	IEXPLORE.EXE
1612	IEXPLORE.EXE
1612	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.execaidaotx.exeiexplore.exe

description	pid	process	target process
PID 1168 wrote to memory of 692	1168	25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe	caidaotx.exe
PID 1168 wrote to memory of 692	1168	25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe	caidaotx.exe
PID 1168 wrote to memory of 692	1168	25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe	caidaotx.exe
PID 1168 wrote to memory of 692	1168	25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe	caidaotx.exe
PID 692 wrote to memory of 1636	692	caidaotx.exe	iexplore.exe
PID 692 wrote to memory of 1636	692	caidaotx.exe	iexplore.exe
PID 692 wrote to memory of 1636	692	caidaotx.exe	iexplore.exe
PID 692 wrote to memory of 1636	692	caidaotx.exe	iexplore.exe
PID 1636 wrote to memory of 1612	1636	iexplore.exe	IEXPLORE.EXE
PID 1636 wrote to memory of 1612	1636	iexplore.exe	IEXPLORE.EXE
PID 1636 wrote to memory of 1612	1636	iexplore.exe	IEXPLORE.EXE
PID 1636 wrote to memory of 1612	1636	iexplore.exe	IEXPLORE.EXE

C:\Users\Admin\AppData\Local\Temp\25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe
"C:\Users\Admin\AppData\Local\Temp\25b78515feb91d63f06604d098df3b099c6a3a20c470549730f662b8025de7cc.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1168

C:\Users\Admin\AppData\Local\Temp\caidaotx.exe
C:\Users\Admin\AppData\Local\Temp/caidaotx.exe
2⤵
- Executes dropped EXE
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:692

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" http://www.maicaidao.com/?md5=4b4a956b9c7dc734f339fa05e4c2a990
3⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1636

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1636 CREDAT:275457 /prefetch:2
4⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1612

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\caidaotx.exe
Filesize
215KB

MD5
4b4a956b9c7dc734f339fa05e4c2a990

SHA1
4a058f0fb95f497f36000eb2c7d697a1aa2c81d5

SHA256
a13971cb63bb5d1fa65224587579a16f47dd89b1f6b02e1ac58d0233e4179802

SHA512
395f234d99cad4b1890625ac6d38350a86673fede1d9c9408e5808f3ef0138a166c2bc08a5868c4f060139340fe25e6d2b51a28336608df5173d0f9473fea514

Download Submit
C:\Users\Admin\AppData\Local\Temp\caidaotx.exe
Filesize
215KB

MD5
4b4a956b9c7dc734f339fa05e4c2a990

SHA1
4a058f0fb95f497f36000eb2c7d697a1aa2c81d5

SHA256
a13971cb63bb5d1fa65224587579a16f47dd89b1f6b02e1ac58d0233e4179802

SHA512
395f234d99cad4b1890625ac6d38350a86673fede1d9c9408e5808f3ef0138a166c2bc08a5868c4f060139340fe25e6d2b51a28336608df5173d0f9473fea514

Download Submit
\Users\Admin\AppData\Local\Temp\caidaotx.exe
Filesize
215KB

MD5
4b4a956b9c7dc734f339fa05e4c2a990

SHA1
4a058f0fb95f497f36000eb2c7d697a1aa2c81d5

SHA256
a13971cb63bb5d1fa65224587579a16f47dd89b1f6b02e1ac58d0233e4179802

SHA512
395f234d99cad4b1890625ac6d38350a86673fede1d9c9408e5808f3ef0138a166c2bc08a5868c4f060139340fe25e6d2b51a28336608df5173d0f9473fea514

Download Submit
\Users\Admin\AppData\Local\Temp\caidaotx.exe
Filesize
215KB

MD5
4b4a956b9c7dc734f339fa05e4c2a990

SHA1
4a058f0fb95f497f36000eb2c7d697a1aa2c81d5

SHA256
a13971cb63bb5d1fa65224587579a16f47dd89b1f6b02e1ac58d0233e4179802

SHA512
395f234d99cad4b1890625ac6d38350a86673fede1d9c9408e5808f3ef0138a166c2bc08a5868c4f060139340fe25e6d2b51a28336608df5173d0f9473fea514

Download Submit
memory/692-59-0x0000000000000000-mapping.dmp

Download
memory/692-62-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/692-66-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/1168-54-0x0000000075FE1000-0x0000000075FE3000-memory.dmp

Filesize
8KB

Download
memory/1168-60-0x00000000034F0000-0x00000000035A3000-memory.dmp

Filesize
716KB

Download
memory/1168-56-0x0000000000400000-0x0000000000515200-memory.dmp

Filesize
1.1MB

Download
memory/1168-55-0x0000000000400000-0x0000000000515200-memory.dmp

Filesize
1.1MB

Download
memory/1168-65-0x00000000034F0000-0x00000000035A3000-memory.dmp

Filesize
716KB

Download
memory/1168-67-0x00000000034F0000-0x00000000035A3000-memory.dmp

Filesize
716KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads