yunsip | 03e591c7f6904384b974a48c7c0c40f48f19e56f900c0a08c41d467a6343d6b9

Analysis

max time kernel
118s
max time network
122s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
04/03/2025, 14:32

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General

Target

JaffaCakes118_4deac9f6a65d8daff19b6c9e0d7b56c0.dll
Size

253KB
MD5

4deac9f6a65d8daff19b6c9e0d7b56c0
SHA1

9b0d9c04db43de0153b288b7c812681d21c278fb
SHA256

03e591c7f6904384b974a48c7c0c40f48f19e56f900c0a08c41d467a6343d6b9
SHA512

26db4136c63ae28bb47af9114294e93d08f3180a622aac033b309c579833bf97685148dc2d1019d1d73bebb11958576d0538a19e8ed39d4cf091f19bdab8542d
SSDEEP

3072:jDKpt9sSR0HUHPwZWLnWVfEAzV2IJIwTBftpmc+z+f3Q0D:jDgtfRQUHPw06MoV2nwTBlhm87

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 2564 wrote to memory of 1700	2564	rundll32.exe	30
PID 2564 wrote to memory of 1700	2564	rundll32.exe	30
PID 2564 wrote to memory of 1700	2564	rundll32.exe	30
PID 2564 wrote to memory of 1700	2564	rundll32.exe	30
PID 2564 wrote to memory of 1700	2564	rundll32.exe	30
PID 2564 wrote to memory of 1700	2564	rundll32.exe	30
PID 2564 wrote to memory of 1700	2564	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4deac9f6a65d8daff19b6c9e0d7b56c0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2564
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4deac9f6a65d8daff19b6c9e0d7b56c0.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1700

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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