b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8

Analysis

max time kernel
112s
max time network
127s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
03/12/2022, 14:38

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General

Target

b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe
Size

82KB
MD5

3ede5715449315044069ee1010c2ab97
SHA1

a5f08c3087aef540fdb62440aa0115ddf55caa48
SHA256

b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8
SHA512

435aeafe6a95e510264ebb346d21b3d3d65f815b5f9abc5ae7b6e1f330065c46d8307ef49cb37a01f4778f3cee70812fc787457349921381f599a73df5ce643a
SSDEEP

1536:ViHIcz+j0W2QA5v974JyZuCEB8SjAYTlOeTNDBPcVt0:2Ii+jV2n7WyZuCkJ0DSJeVt0

Score

8^/10

adware evasion stealer trojan

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
588	PulleyContortion.exe
700	PulleyContortion.exe

Loads dropped DLL 4 IoCs

pid	Process
996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe
996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe
996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe
996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe

Installs/modifies Browser Helper Object 2 TTPs 1 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\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}	regsvr32.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\AxisFlex\AxisRail.exe	PulleyContortion.exe
File created	C:\Program Files\KnockerHarridan\FlexPageant.exe	PulleyContortion.exe
File opened for modification	C:\Program Files\AxisFlex\AxisRail.exe	PulleyContortion.exe
File opened for modification	C:\Program Files\KnockerHarridan\FlexPageant.exe	PulleyContortion.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\ZAYUOZBIDUJF.dll	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe

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

System Information Discovery
T1082

Modifies registry class 46 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\InprocServer32\ = "C:\\Windows\\ZAYUOZBIDUJF.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\HELPDIR\ = "C:\\Windows"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\TypeLib\ = "{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei\CLSID\ = "{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\VersionIndependentProgID\ = "Thunder.xunlei"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\0\win32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\0\win32\ = "C:\\Windows\\ZAYUOZBIDUJF.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ = "Ixunlei"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\ProgID\ = "Thunder.xunlei.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\ = "Thunder 1.0 Type Library"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\TypeLib\ = "{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ = "Ixunlei"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\TypeLib\ = "{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei\CurVer\ = "Thunder.xunlei.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei\CurVer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\ = "xunlei Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei.1\ = "xunlei Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei.1\CLSID\ = "{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei\ = "xunlei Class"	regsvr32.exe

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe
996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe
996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe
996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe
996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe
588	PulleyContortion.exe
588	PulleyContortion.exe
700	PulleyContortion.exe
700	PulleyContortion.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 996 wrote to memory of 1920	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	27
PID 996 wrote to memory of 1920	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	27
PID 996 wrote to memory of 1920	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	27
PID 996 wrote to memory of 1920	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	27
PID 996 wrote to memory of 1920	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	27
PID 996 wrote to memory of 1920	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	27
PID 996 wrote to memory of 1920	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	27
PID 996 wrote to memory of 588	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	28
PID 996 wrote to memory of 588	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	28
PID 996 wrote to memory of 588	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	28
PID 996 wrote to memory of 588	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	28
PID 996 wrote to memory of 700	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	29
PID 996 wrote to memory of 700	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	29
PID 996 wrote to memory of 700	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	29
PID 996 wrote to memory of 700	996	b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe	29

C:\Users\Admin\AppData\Local\Temp\b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe
"C:\Users\Admin\AppData\Local\Temp\b78376ff5c5624872b5fdbc27bcebabff70b240eb0ca1eef121225e50d2fedd8.exe"
1⤵
- Loads dropped DLL
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:996
- C:\Windows\SysWOW64\regsvr32.exe
  regsvr32.exe /s "C:\Windows\ZAYUOZBIDUJF.dll"
  2⤵
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:1920
- C:\Users\Admin\AppData\Local\Temp\PulleyContortion.exe
  "C:\Users\Admin\AppData\Local\Temp\PulleyContortion.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of SetWindowsHookEx
  PID:588
- C:\Users\Admin\AppData\Local\Temp\PulleyContortion.exe
  C:\Users\Admin\AppData\Local\Temp\PulleyContortion.exe
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of SetWindowsHookEx
  PID:700

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Browser Extensions

T1176

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\PulleyContortion.exe

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

Download Submit
C:\Users\Admin\AppData\Local\Temp\PulleyContortion.exe

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

Download Submit
C:\Windows\ZAYUOZBIDUJF.dll

Filesize
114KB

MD5
1fdc9e1e656a5f66aafe055677f97b31

SHA1
7eadf174f3c369db875c49f2e9bcd3ba6c2a02ce

SHA256
443e68f7f441b0677252b796aae8e05bf061a1a062346a76e45a09566f92793a

SHA512
20b73e25bfd813ca83cbb812a77607bbe4ec342882a146ff4e8dd870a3684c9771e55888065146949073f383fe47aaadd765ec67d07de418671493d388a3f650

Download Submit
\Users\Admin\AppData\Local\Temp\PulleyContortion.exe

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

Download Submit
\Users\Admin\AppData\Local\Temp\PulleyContortion.exe

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

Download Submit
\Users\Admin\AppData\Local\Temp\PulleyContortion.exe

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

Download Submit
\Users\Admin\AppData\Local\Temp\PulleyContortion.exe

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

Download Submit
memory/996-54-0x00000000760E1000-0x00000000760E3000-memory.dmp

Filesize
8KB

Download