f4639330a7f3a905bc5faa07eee325f5d9dee6ef4e96e05eeff8e91682d3b43b

Analysis

max time kernel
29s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16/09/2024, 08:47

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General

Target

Ransom.Win32.Tescrypt.exe
Size

80KB
MD5

e4810c25939a78d1479e52720a25b830
SHA1

83fcc85e65f96989b6602f59273697e4bcfe7114
SHA256

f4639330a7f3a905bc5faa07eee325f5d9dee6ef4e96e05eeff8e91682d3b43b
SHA512

cc637e01a5a53baeb4909057347349687a0ff999f88c71a20b5263190ee341623ef78c22123aa3d988e06ae39a8c3ab73273b40bd81b4efbb2c35763437aa002
SSDEEP

1536:EYPSyyHrcrpFPgzy7yCqF47UV1Hi8yBiweQKIIXIAZB0CmuJd4BXL:EMSyyLuFoLCqCm1C8yBijpBbd45

Score

7^/10

discovery upx

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
3044	Ransom.Win32.Tescrypt.exe

Executes dropped EXE 1 IoCs

pid	Process
3044	Ransom.Win32.Tescrypt.exe

Loads dropped DLL 1 IoCs

pid	Process
1860	Ransom.Win32.Tescrypt.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1860-0-0x0000000000400000-0x000000000043A000-memory.dmp	upx
behavioral1/memory/1860-12-0x0000000000310000-0x000000000034A000-memory.dmp	upx
behavioral1/files/0x000a00000001225c-10.dat	upx

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Ransom.Win32.Tescrypt.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1860	Ransom.Win32.Tescrypt.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1860	Ransom.Win32.Tescrypt.exe
3044	Ransom.Win32.Tescrypt.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1860 wrote to memory of 3044	1860	Ransom.Win32.Tescrypt.exe	29
PID 1860 wrote to memory of 3044	1860	Ransom.Win32.Tescrypt.exe	29
PID 1860 wrote to memory of 3044	1860	Ransom.Win32.Tescrypt.exe	29
PID 1860 wrote to memory of 3044	1860	Ransom.Win32.Tescrypt.exe	29

C:\Users\Admin\AppData\Local\Temp\Ransom.Win32.Tescrypt.exe
"C:\Users\Admin\AppData\Local\Temp\Ransom.Win32.Tescrypt.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: RenamesItself
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1860
- C:\Users\Admin\AppData\Local\Temp\Ransom.Win32.Tescrypt.exe
  C:\Users\Admin\AppData\Local\Temp\Ransom.Win32.Tescrypt.exe
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:3044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\Ransom.Win32.Tescrypt.exe

Filesize
80KB

MD5
818862a63675792be9e27b6421c2386f

SHA1
42f191bd3bfaebe585fc2b1cdc9f7add94b60f82

SHA256
724bd0ddf58b27a50b087b4fdcdc99c21ce1ef521b898b6ad6cca65c191b805a

SHA512
e66bc66467abddd2f0f60c201cc9e3f08055116fc6d77895f22015263375a1de0573fbd249ebb086ba835baab9c7f08edf040a48ae04803f4afbd8e4f9cb882b

Download Submit
memory/1860-0-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1860-1-0x0000000000030000-0x000000000003E000-memory.dmp

Filesize
56KB

Download
memory/1860-2-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1860-12-0x0000000000310000-0x000000000034A000-memory.dmp

Filesize
232KB

Download
memory/1860-16-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/3044-17-0x0000000000030000-0x000000000003E000-memory.dmp

Filesize
56KB

Download
memory/3044-18-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/3044-23-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3044-28-0x0000000000180000-0x000000000019B000-memory.dmp

Filesize
108KB

Download
memory/3044-29-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download