f2f4316efa003dac2f39e23f4d84d905ca74f05ee26ef26d01013537d1989472

Analysis

max time kernel
154s
max time network
165s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
02-10-2022 11:49

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General

Target

f2f4316efa003dac2f39e23f4d84d905ca74f05ee26ef26d01013537d1989472.exe
Size

155KB
MD5

6fbe350589e935c3d7e83dd030b887a8
SHA1

b1b1d6f9d318683b85996c1aedbee49826516b2f
SHA256

f2f4316efa003dac2f39e23f4d84d905ca74f05ee26ef26d01013537d1989472
SHA512

80791870880eb93dea3ee1f9988cc1feb3433f0c40c495b16fe2ca3272c8ff317cda7663ffba3265350f355ae92f62cd4a1bac3f6556faa8262bb3dd499e6aee
SSDEEP

3072:wbm5Jewy+gQ5cL8Hag0iY2gjEkJTDCvEQDh96ytvbw:dBy+Lc8LdDOhgvELytv

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
3348	rundll32.exe
5116	IEXPLORE.EXE
5116	IEXPLORE.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\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\amstb = "rundll32.exe \"C:\\Users\\Admin\\AppData\\Roaming\\amstb.dll\",IndexRecordCount"	rundll32.exe

Modifies Internet Explorer settings 1 TTPs 39 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "30987907"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "30987907"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2528048157"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "2528048157"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2337579485"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2526642951"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000000000001000000ffffffffffffffffffffffffffffffff5800000000000000de04000065020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "2337579485"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2526642951"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000000000001000000ffffffffffffffffffffffffffffffff3e0000003e000000c4040000a3020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "30987907"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\VersionManager	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "371496318"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "30987907"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "30987907"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{B0D3D3F7-4276-11ED-89AC-E62D9FD3CB0B} = "0"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "30987907"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
5064	iexplore.exe
5064	iexplore.exe
5064	iexplore.exe

Suspicious use of SetWindowsHookEx 15 IoCs

pid	Process
5064	iexplore.exe
5064	iexplore.exe
2232	IEXPLORE.EXE
2232	IEXPLORE.EXE
3348	rundll32.exe
5064	iexplore.exe
5064	iexplore.exe
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
3348	rundll32.exe
5064	iexplore.exe
5064	iexplore.exe
5116	IEXPLORE.EXE
5116	IEXPLORE.EXE
3348	rundll32.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4664 wrote to memory of 3348	4664	f2f4316efa003dac2f39e23f4d84d905ca74f05ee26ef26d01013537d1989472.exe	83
PID 4664 wrote to memory of 3348	4664	f2f4316efa003dac2f39e23f4d84d905ca74f05ee26ef26d01013537d1989472.exe	83
PID 4664 wrote to memory of 3348	4664	f2f4316efa003dac2f39e23f4d84d905ca74f05ee26ef26d01013537d1989472.exe	83
PID 5064 wrote to memory of 2232	5064	iexplore.exe	88
PID 5064 wrote to memory of 2232	5064	iexplore.exe	88
PID 5064 wrote to memory of 2232	5064	iexplore.exe	88
PID 5064 wrote to memory of 1020	5064	iexplore.exe	89
PID 5064 wrote to memory of 1020	5064	iexplore.exe	89
PID 5064 wrote to memory of 1020	5064	iexplore.exe	89
PID 5064 wrote to memory of 5116	5064	iexplore.exe	90
PID 5064 wrote to memory of 5116	5064	iexplore.exe	90
PID 5064 wrote to memory of 5116	5064	iexplore.exe	90

C:\Users\Admin\AppData\Local\Temp\f2f4316efa003dac2f39e23f4d84d905ca74f05ee26ef26d01013537d1989472.exe
"C:\Users\Admin\AppData\Local\Temp\f2f4316efa003dac2f39e23f4d84d905ca74f05ee26ef26d01013537d1989472.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4664
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe "C:\Users\Admin\AppData\Roaming\amstb.dll",IndexRecordCount
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of SetWindowsHookEx
  PID:3348

C:\Program Files (x86)\Internet Explorer\ielowutil.exe
"C:\Program Files (x86)\Internet Explorer\ielowutil.exe" -CLSID:{0002DF01-0000-0000-C000-000000000046} -Embedding
1⤵
PID:3524

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
1⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5064
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:5064 CREDAT:17410 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:2232
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:5064 CREDAT:82948 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:1020
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:5064 CREDAT:17414 /prefetch:2
  2⤵
  - Loads dropped DLL
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:5116

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\amstb.dll

Filesize
155KB

MD5
635582228a444f99eedfb546b1f4d0e0

SHA1
23cde35e8a11229dcd1a660c533f1e49120f0d9b

SHA256
b05a363fdde81783fc0cbc2ebbd9d6ed01a8157f028725262d5e4e706663ee0d

SHA512
b464081073e150b97fcccd1f80c617d9dd17d1312a7a74077b02f7d76c23587a1df4cd4ae22fd0797f787b5f87f197887fa08c8efbfe951b03ad7ed2fde659bc

Download Submit
C:\Users\Admin\AppData\Roaming\amstb.dll

Filesize
155KB

MD5
635582228a444f99eedfb546b1f4d0e0

SHA1
23cde35e8a11229dcd1a660c533f1e49120f0d9b

SHA256
b05a363fdde81783fc0cbc2ebbd9d6ed01a8157f028725262d5e4e706663ee0d

SHA512
b464081073e150b97fcccd1f80c617d9dd17d1312a7a74077b02f7d76c23587a1df4cd4ae22fd0797f787b5f87f197887fa08c8efbfe951b03ad7ed2fde659bc

Download Submit
C:\Users\Admin\AppData\Roaming\amstb.dll

Filesize
155KB

MD5
635582228a444f99eedfb546b1f4d0e0

SHA1
23cde35e8a11229dcd1a660c533f1e49120f0d9b

SHA256
b05a363fdde81783fc0cbc2ebbd9d6ed01a8157f028725262d5e4e706663ee0d

SHA512
b464081073e150b97fcccd1f80c617d9dd17d1312a7a74077b02f7d76c23587a1df4cd4ae22fd0797f787b5f87f197887fa08c8efbfe951b03ad7ed2fde659bc

Download Submit
C:\Users\Admin\AppData\Roaming\amstb.dll

Filesize
155KB

MD5
635582228a444f99eedfb546b1f4d0e0

SHA1
23cde35e8a11229dcd1a660c533f1e49120f0d9b

SHA256
b05a363fdde81783fc0cbc2ebbd9d6ed01a8157f028725262d5e4e706663ee0d

SHA512
b464081073e150b97fcccd1f80c617d9dd17d1312a7a74077b02f7d76c23587a1df4cd4ae22fd0797f787b5f87f197887fa08c8efbfe951b03ad7ed2fde659bc

Download Submit
memory/3348-138-0x0000000000000000-mapping.dmp

Download
memory/3348-142-0x0000000000C40000-0x0000000000C6A000-memory.dmp

Filesize
168KB

Download
memory/3348-146-0x00000000008D0000-0x00000000008E3000-memory.dmp

Filesize
76KB

Download
memory/4664-132-0x0000000000540000-0x0000000000553000-memory.dmp

Filesize
76KB

Download
memory/4664-133-0x0000000000570000-0x000000000059A000-memory.dmp

Filesize
168KB

Download
memory/4664-137-0x0000000000540000-0x0000000000553000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads