7c29213e8f79b633ac408a6b7642ccb575e08f1fc89b60b0e4310b42d7241c29

Analysis

max time kernel
121s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
15/02/2024, 04:24

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General

Target
9cf388c766c104aa51e73796ba06d62e.exe
Size 97KB
Sample240215-e1c63sgd9x
SHA256 7c29213e8f79b633ac408a6b7642ccb575e08f1fc89b60b0e4310b42d7241c29
MD5 9cf388c766c104aa51e73796ba06d62e
SHA1 78858cc0f0901948bcd6c19a9f48bd792e7a3292
SHA512 6bdd816c4b4be399a282f738af06961419dfaa68cdad7cebeec576f031dc8923fabbb9869205de073a90a81d4882eef3b3d0bb657f0e2582ce1eb99f3718aafe
SSDEEP 3072:T7m12cZ8UtE2UvMzSKMLTQ7ja8qULZsJQk:TK1fo5yo3Q7ja8qe
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

adware discovery persistence stealer upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4164	PostTip.exe

Loads dropped DLL 2 IoCs

pid	Process
1160	regsvr32.exe
1648	regsvr32.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5900-0-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral2/memory/5900-11-0x0000000000400000-0x0000000000448000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\PostTip = "C:\\Program Files (x86)\\PostTip\\PostTip.exe"	PostTip.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Installs/modifies Browser Helper Object 2 TTPs 3 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C4BF6897-41A2-454b-AC3B-437F30BEA671}	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\BROWSER HELPER OBJECTS\{C4BF6897-41A2-454B-AC3B-437F30BEA671}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C4BF6897-41A2-454b-AC3B-437F30BEA671}	regsvr32.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PostTip\PostTip.exe	9cf388c766c104aa51e73796ba06d62e.exe
File created	C:\Program Files (x86)\PostTip\PostTip.dll	9cf388c766c104aa51e73796ba06d62e.exe
File created	C:\Program Files (x86)\PostTip\uninstall.exe	9cf388c766c104aa51e73796ba06d62e.exe

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

System Information Discovery
T1082

Modifies registry class 64 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\ = "PostTip"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\InprocServer32\ = "C:\\Program Files (x86)\\PostTip\\PostTip.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A12EF54F-2691-4C32-AC1B-F65D144A3988}\1.0\FLAGS	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\TypeLib\ = "{A12EF54F-2691-4C32-AC1B-F65D144A3988}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\TypeLib\Version = "1.0"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl\CurVer\ = "SideTab.SideTabCtl.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl.1\CLSID\ = "{C4BF6897-41A2-454b-AC3B-437F30BEA671}"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\ = "PostTip"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl\ = "SideTabCtl Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A12EF54F-2691-4C32-AC1B-F65D144A3988}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\TypeLib\ = "{A12EF54F-2691-4C32-AC1B-F65D144A3988}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\ProgID\ = "SideTab.SideTabCtl.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A12EF54F-2691-4C32-AC1B-F65D144A3988}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl.1\ = "SideTabCtl Class"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\ProgID\ = "SideTab.SideTabCtl.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl\ = "SideTabCtl Class"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\InprocServer32\ = "C:\\Program Files (x86)\\PostTip\\PostTip.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A12EF54F-2691-4C32-AC1B-F65D144A3988}\1.0\HELPDIR	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\ = "ISideTabCtl"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl.1\ = "SideTabCtl Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl\CLSID\ = "{C4BF6897-41A2-454b-AC3B-437F30BEA671}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\VersionIndependentProgID\ = "SideTab.SideTabCtl"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\TypeLib\ = "{A12EF54F-2691-4C32-AC1B-F65D144A3988}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A12EF54F-2691-4C32-AC1B-F65D144A3988}\1.0\FLAGS\ = "0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A12EF54F-2691-4C32-AC1B-F65D144A3988}\1.0\0\win32\ = "C:\\Program Files (x86)\\PostTip\\PostTip.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl\CLSID\ = "{C4BF6897-41A2-454b-AC3B-437F30BEA671}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SideTab.SideTabCtl.1\CLSID\ = "{C4BF6897-41A2-454b-AC3B-437F30BEA671}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A12EF54F-2691-4C32-AC1B-F65D144A3988}\1.0\ = "SideTab 1.0 Type Library"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\VersionIndependentProgID\ = "SideTab.SideTabCtl"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\TypeLib\ = "{A12EF54F-2691-4C32-AC1B-F65D144A3988}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4BF6897-41A2-454b-AC3B-437F30BEA671}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A12EF54F-2691-4C32-AC1B-F65D144A3988}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A12EF54F-2691-4C32-AC1B-F65D144A3988}\1.0\HELPDIR\ = "C:\\Program Files (x86)\\PostTip\\"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E2B006B6-159A-4384-B05C-4B5511C16354}\ = "ISideTabCtl"	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5900	9cf388c766c104aa51e73796ba06d62e.exe
5900	9cf388c766c104aa51e73796ba06d62e.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
5900	9cf388c766c104aa51e73796ba06d62e.exe
5900	9cf388c766c104aa51e73796ba06d62e.exe
4164	PostTip.exe
4164	PostTip.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5900 wrote to memory of 1160	5900	9cf388c766c104aa51e73796ba06d62e.exe	85
PID 5900 wrote to memory of 1160	5900	9cf388c766c104aa51e73796ba06d62e.exe	85
PID 5900 wrote to memory of 1160	5900	9cf388c766c104aa51e73796ba06d62e.exe	85
PID 5900 wrote to memory of 4164	5900	9cf388c766c104aa51e73796ba06d62e.exe	86
PID 5900 wrote to memory of 4164	5900	9cf388c766c104aa51e73796ba06d62e.exe	86
PID 5900 wrote to memory of 4164	5900	9cf388c766c104aa51e73796ba06d62e.exe	86
PID 5900 wrote to memory of 4408	5900	9cf388c766c104aa51e73796ba06d62e.exe	87
PID 5900 wrote to memory of 4408	5900	9cf388c766c104aa51e73796ba06d62e.exe	87
PID 5900 wrote to memory of 4408	5900	9cf388c766c104aa51e73796ba06d62e.exe	87
PID 4164 wrote to memory of 1648	4164	PostTip.exe	89
PID 4164 wrote to memory of 1648	4164	PostTip.exe	89
PID 4164 wrote to memory of 1648	4164	PostTip.exe	89

C:\Users\Admin\AppData\Local\Temp\9cf388c766c104aa51e73796ba06d62e.exe
"C:\Users\Admin\AppData\Local\Temp\9cf388c766c104aa51e73796ba06d62e.exe"
1⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5900
- C:\Windows\SysWOW64\regsvr32.exe
  regsvr32 /s "C:\Program Files (x86)\PostTip\PostTip.dll"
  2⤵
  - Loads dropped DLL
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:1160
- C:\Program Files (x86)\PostTip\PostTip.exe
  "C:\Program Files (x86)\PostTip\PostTip.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4164
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32 /s "C:\Program Files (x86)\PostTip\PostTip.dll"
    3⤵
    - Loads dropped DLL
    - Installs/modifies Browser Helper Object
    - Modifies registry class
    PID:1648
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c \DelUS.bat
  2⤵
  PID:4408

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Browser Extensions

T1176

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

DelUS.bat

Path C:\DelUS.bat
Size 243B
SHA256 486ffca89f019bc358c8f8a26da1b469782626468fde414260f280ecdfa524b2
MD5 6565e66814d125608708ff95438ee0b3
SHA1 16e6aeb77fc547ce783087d3cd9bbf26052f3a89
SHA512 46bacb5d967cf50af85ac0cf2327b09187794483d4858780a0696825c893e5cea968b8416e4971fabb13ee62b0b9c744e984f7383b92ab4ececedf43c865f8d9
MD5 SHA1 SHA512

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PostTip.dll

Path C:\Program Files (x86)\PostTip\PostTip.dll
Size 162KB
SHA256 7434776f552dde651370f0e43026def6c56c412eb1c62d5214406b34144319af
MD5 dc62c2f61a803bd1292b0b169fa6f8d9
SHA1 117ecef652f645ab87a611eab5bc16ae085d6ffb
SHA512 55f22c83fcfccf10bb799af214b456392f43b7c394a7dcebbe2fe7059c65ba2fad859c9709b4ca2ab28ab55f03e054196a5b3857a0ec09c3b603a3458cb212d1
SSDEEP 3072:dinUVfxsk3VYb2WnM0XJDQXdyYQTEt+Tt8SnnPEaHNXQcOqC:wA3Vm2kJ8QYQTrmSnPEaNvOq
MD5 SHA1 SHA512 SSDEEP

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PostTip.exe

Path C:\Program Files (x86)\PostTip\PostTip.exe
Size 38KB
SHA256 8ec9ca043b655d4bf868ccd7d9d5fdd4e23ad8610aed2fb983370437b7851feb
MD5 c2b5be376cac31c0b01603105ae4ea89
SHA1 4fcfa0181ca5478103c6999199957be40f4a937b
SHA512 d17e798a414a6d2295f13339a10151f2a34cff5a7d6c81862c26a0c4ac831bf9f867f9f2bf028fa15f189a93f8d8883a334a9857a33bcabac916376267c9da72
SSDEEP 384:a+tB3LvVwIvdKNMow7lhNBg8EbNgN1qCeEWWEYJLuPkCQuY:aoB3j7dKmow7lTBg8igzqOWWpLuDA
MD5 SHA1 SHA512 SSDEEP

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memory/5900-0-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/5900-11-0x0000000000400000-0x0000000000448000-memory.dmp

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