yunsip | b7eaed0eff01353708317b9e1da0a1be3bfad4e8ed88c7343bb15507ae33fb62

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
10/03/2025, 06:43

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General

Target

JaffaCakes118_5da11df8f27e9715daab771845e92c70.dll
Size

630KB
MD5

5da11df8f27e9715daab771845e92c70
SHA1

6a320b4b6151ea57a6672204096184e66cc10d27
SHA256

b7eaed0eff01353708317b9e1da0a1be3bfad4e8ed88c7343bb15507ae33fb62
SHA512

2781c5d781acd19a73583219b320d5c6b601b38fad50f24d57d9961a463fba67f7e3159613900f14a2f5f223990b1fd2904acb0aae7ec2242e92f4ddc025a582
SSDEEP

3072:jDKpt9sSR0HUHPwZWLnWVfEAzV2IJIwTBftpmc+z+f3Q0o:jDgtfRQUHPw06MoV2nwTBlhm8A

Score

10^/10

yunsip banker discovery trojan

Malware Config

Signatures

Yunsip
Remote backdoor which communicates with a C2 server to receive commands.
trojan banker yunsip
Yunsip family
yunsip

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	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 2592	2096	rundll32.exe	30
PID 2096 wrote to memory of 2592	2096	rundll32.exe	30
PID 2096 wrote to memory of 2592	2096	rundll32.exe	30
PID 2096 wrote to memory of 2592	2096	rundll32.exe	30
PID 2096 wrote to memory of 2592	2096	rundll32.exe	30
PID 2096 wrote to memory of 2592	2096	rundll32.exe	30
PID 2096 wrote to memory of 2592	2096	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5da11df8f27e9715daab771845e92c70.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5da11df8f27e9715daab771845e92c70.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2592

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

Windows 7 deprecation

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