9456c392bea1012192b9f8d2da19be0405d92475c2db80a08952c4917866951a

General

Target

53d7143189b5bdf2c7b18cba76853141.exe
Size

336KB
MD5

53d7143189b5bdf2c7b18cba76853141
SHA1

ab2f4036a579ca795d17479e1f2ffffd6d9987cb
SHA256

9456c392bea1012192b9f8d2da19be0405d92475c2db80a08952c4917866951a
SHA512

43dbf3dc3a8078b41b8d707f4e1107ccbe58a1921fbe46a70d17f88656f1745fb9c138ea8c31cbcdfe0d2ae53c03c26af9206338dfb133909b940d706f21f463
SSDEEP

6144:kYMzNIyGf7cUrOIHyKKfsVOv53ffR21a8+FgvJoF+xkLMHrjxvKO86XpOAA:kLzeF7c48KK0VK3fflgvJv0Krjxd5ZX

Score

8^/10

discovery evasion persistence trojan upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	53d7143189b5bdf2c7b18cba76853141.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Nnmuk = "C:\\Windows\\SysWOW64\\mshtmlu.exe"	53d7143189b5bdf2c7b18cba76853141.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	mshtmlu.exe

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	53d7143189b5bdf2c7b18cba76853141.exe

Deletes itself 1 IoCs

pid	Process
2556	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2352	mshtmlu.exe

Loads dropped DLL 2 IoCs

pid	Process
1636	53d7143189b5bdf2c7b18cba76853141.exe
1636	53d7143189b5bdf2c7b18cba76853141.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1636-1-0x0000000000400000-0x00000000004BF000-memory.dmp	upx
behavioral1/memory/1636-0-0x0000000000400000-0x00000000004BF000-memory.dmp	upx
behavioral1/memory/1636-2-0x0000000000400000-0x00000000004BF000-memory.dmp	upx
behavioral1/memory/1636-26-0x0000000000400000-0x00000000004BF000-memory.dmp	upx

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

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	53d7143189b5bdf2c7b18cba76853141.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\mshtmlu.exe	53d7143189b5bdf2c7b18cba76853141.exe
File opened for modification	C:\Windows\SysWOW64\mshtmlu.exe	53d7143189b5bdf2c7b18cba76853141.exe

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

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2156	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1636	53d7143189b5bdf2c7b18cba76853141.exe
1636	53d7143189b5bdf2c7b18cba76853141.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1636	53d7143189b5bdf2c7b18cba76853141.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2352	mshtmlu.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1636 wrote to memory of 2352	1636	53d7143189b5bdf2c7b18cba76853141.exe	29
PID 1636 wrote to memory of 2352	1636	53d7143189b5bdf2c7b18cba76853141.exe	29
PID 1636 wrote to memory of 2352	1636	53d7143189b5bdf2c7b18cba76853141.exe	29
PID 1636 wrote to memory of 2352	1636	53d7143189b5bdf2c7b18cba76853141.exe	29
PID 2352 wrote to memory of 2156	2352	mshtmlu.exe	31
PID 2352 wrote to memory of 2156	2352	mshtmlu.exe	31
PID 2352 wrote to memory of 2156	2352	mshtmlu.exe	31
PID 2352 wrote to memory of 2156	2352	mshtmlu.exe	31
PID 1636 wrote to memory of 2556	1636	53d7143189b5bdf2c7b18cba76853141.exe	33
PID 1636 wrote to memory of 2556	1636	53d7143189b5bdf2c7b18cba76853141.exe	33
PID 1636 wrote to memory of 2556	1636	53d7143189b5bdf2c7b18cba76853141.exe	33
PID 1636 wrote to memory of 2556	1636	53d7143189b5bdf2c7b18cba76853141.exe	33

C:\Users\Admin\AppData\Local\Temp\53d7143189b5bdf2c7b18cba76853141.exe
"C:\Users\Admin\AppData\Local\Temp\53d7143189b5bdf2c7b18cba76853141.exe"
1⤵
- Adds policy Run key to start application
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1636
- C:\Windows\SysWOW64\mshtmlu.exe
  C:\Windows\SysWOW64\mshtmlu.exe
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2352
- - C:\Windows\SysWOW64\ipconfig.exe
    "C:\Windows\system32\ipconfig.exe" /flushdns
    3⤵
    - Gathers network information
    PID:2156
- C:\Windows\SysWOW64\cmd.exe
  /c C:\Users\Admin\AppData\Local\Temp\~unins4841.bat "C:\Users\Admin\AppData\Local\Temp\53d7143189b5bdf2c7b18cba76853141.exe"
  2⤵
  - Deletes itself
  PID:2556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\~unins4841.bat

Filesize
49B

MD5
9e0a2f5ab30517809b95a1ff1dd98c53

SHA1
5c1eefdf10e67d1e9216e2e3f5e92352d583c9ce

SHA256
97ac9fee75a1f7b63b3115e9c4fb9dda80b1caba26d2fb51325670dee261fe32

SHA512
e959cc1fd48fb1cccf135a697924c775a3812bab211fc7f9b00c5a9d617261d84c5d6f7cb548774c1e8f46811b06ca39c5603d0e10cbcb7b805f9abbe49b9b42

Download Submit
\Windows\SysWOW64\mshtmlu.exe

Filesize
149KB

MD5
d3f41444395d4cb942dc75c78f5d325b

SHA1
17d59b18773fb240c5955e85d38e009f9a4bbcd9

SHA256
806ad1201d7376313dda95bcac9ec84d5d4c8e80160c84d6dcd10adf147d3b91

SHA512
62ce678bbef4dc623739c2404c5d01741a9cb0350c906a6ed41c9ee9ba37c639ac1b5a3bdc4c89c1c6b7c4e6e04687e5de6fcc69dc8a6e6f904c5b33f5fdec75

Download Submit
memory/1636-1-0x0000000000400000-0x00000000004BF000-memory.dmp

Filesize
764KB

Download
memory/1636-0-0x0000000000400000-0x00000000004BF000-memory.dmp

Filesize
764KB

Download
memory/1636-2-0x0000000000400000-0x00000000004BF000-memory.dmp

Filesize
764KB

Download
memory/1636-3-0x0000000000220000-0x00000000002BD000-memory.dmp

Filesize
628KB

Download
memory/1636-7-0x00000000002C0000-0x00000000002C1000-memory.dmp

Filesize
4KB

Download
memory/1636-26-0x0000000000400000-0x00000000004BF000-memory.dmp

Filesize
764KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads