513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4

Analysis

max time kernel
121s
max time network
136s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
01/10/2022, 22:46

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General

Target

513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe
Size

301KB
MD5

77d0ce0683aa2f27c161f1c1c3ac87f4
SHA1

f9c6f8db507e5ae9e7ee3bce6682d2310b31b7da
SHA256

513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4
SHA512

1d3267aaa1e84038c2b833dec662aaac272709985bf0b120dd66606eb299bba9ea95940d6b51eedbf3f14f011ce6f6c69fcc37fd3efc80f1ecd36efa5fb9401c
SSDEEP

6144:NCjVktZuPRDf+cxRPxEYhBHStiVuU9r8wYbF0wp3kskcRAdAVx64eI7oFcnzd8PA:NCjutZu5Dm27HStVMr8wYbF0wp3kskcX

Score

8^/10

adware evasion stealer trojan

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1360	SteepleContortion.exe
608	SteepleContortion.exe

Loads dropped DLL 4 IoCs

pid	Process
1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe
1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe
1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe
1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.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	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.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 opened for modification	C:\Program Files\VandalizePreside\TaperImpose.exe	SteepleContortion.exe
File opened for modification	C:\Program Files\PageantIntricacy\PageantCaulk.exe	SteepleContortion.exe
File created	C:\Program Files\PageantIntricacy\PageantCaulk.exe	SteepleContortion.exe
File created	C:\Program Files\VandalizePreside\TaperImpose.exe	SteepleContortion.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\ZAYUOZBIDUJF.dll	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.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\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\HELPDIR	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0	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\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\FLAGS\ = "0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ = "Ixunlei"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei.1\CLSID\ = "{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\TypeLib\ = "{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\ProgID	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\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\InprocServer32\ = "C:\\Windows\\ZAYUOZBIDUJF.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ = "Ixunlei"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei.1\CLSID	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}\TypeLib\ = "{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\ = "Thunder 1.0 Type Library"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\HELPDIR\ = "C:\\Windows"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei\ = "xunlei Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\ = "xunlei Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\InprocServer32\ThreadingModel = "Apartment"	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}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\0	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
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ProxyStubClsid32	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\Thunder.xunlei\CurVer\ = "Thunder.xunlei.1"	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\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F4BAEFBE-7CF3-0EA8-3E22-080C5180AC1F}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{05D67BE6-2A57-DB9A-2C0A-BF2753C5CC9F}\1.0\0\win32	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\Interface\{11D9AE74-3FC1-41D6-911B-F5F503BBD8FE}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	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.1\ = "xunlei Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Thunder.xunlei	regsvr32.exe

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe
1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe
1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe
1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe
1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe
1360	SteepleContortion.exe
1360	SteepleContortion.exe
608	SteepleContortion.exe
608	SteepleContortion.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1960 wrote to memory of 1696	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	28
PID 1960 wrote to memory of 1696	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	28
PID 1960 wrote to memory of 1696	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	28
PID 1960 wrote to memory of 1696	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	28
PID 1960 wrote to memory of 1696	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	28
PID 1960 wrote to memory of 1696	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	28
PID 1960 wrote to memory of 1696	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	28
PID 1960 wrote to memory of 1360	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	29
PID 1960 wrote to memory of 1360	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	29
PID 1960 wrote to memory of 1360	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	29
PID 1960 wrote to memory of 1360	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	29
PID 1960 wrote to memory of 608	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	30
PID 1960 wrote to memory of 608	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	30
PID 1960 wrote to memory of 608	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	30
PID 1960 wrote to memory of 608	1960	513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe	30

C:\Users\Admin\AppData\Local\Temp\513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe
"C:\Users\Admin\AppData\Local\Temp\513adfc4da83e238e2610c874859bc9e943d7ab8af40544cdd935cd52adc23c4.exe"
1⤵
- Loads dropped DLL
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1960
- C:\Windows\SysWOW64\regsvr32.exe
  regsvr32.exe /s "C:\Windows\ZAYUOZBIDUJF.dll"
  2⤵
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:1696
- C:\Users\Admin\AppData\Local\Temp\SteepleContortion.exe
  "C:\Users\Admin\AppData\Local\Temp\SteepleContortion.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of SetWindowsHookEx
  PID:1360
- C:\Users\Admin\AppData\Local\Temp\SteepleContortion.exe
  C:\Users\Admin\AppData\Local\Temp\SteepleContortion.exe
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of SetWindowsHookEx
  PID:608

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\SteepleContortion.exe

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

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

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

Download Submit
C:\Windows\ZAYUOZBIDUJF.dll

Filesize
333KB

MD5
b97630aa0bfe1420c162a253610d170a

SHA1
16c9ea06288ab5948612d2dcb28be2df719dda35

SHA256
d9ecd3a1bcabe58164820a4dc28277652ac2f5f6efeff6ab46cf8d3b88a37b65

SHA512
6dd5296f88d6fadb59b1722a92e716a4135bb6f37b1b9ac31b884ff1f9d8c4ebc8d96914e68f67074254d24fc8a4cbaaf1ce5fb9980875d77a8173da49189ec2

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

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

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

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

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

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

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

Filesize
28KB

MD5
6697555ead62e6b9fb71a0ffb6d62992

SHA1
55b57b52fe0d4af8716db57a98ab011b1dbe4181

SHA256
683a7e3bc4e63ba70bf88c23ae895109d19fc02c9d084ddd759a5569b56d2cd6

SHA512
36b7c24cbc5cef1ea6cca65c2054e3baae7096932bbb2caa4857d4f324407fe5a92e610d7baf979dfa881d82f9c99c74037b774967cd5d31af5a120bd9eefdf8

Download Submit
memory/1960-54-0x0000000074AB1000-0x0000000074AB3000-memory.dmp

Filesize
8KB

Download