yunsip | 7cb66096b63de75922e00368cf0a20e5cfb60ded49953a98a7f908cb33b4c95e

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04/03/2025, 19:44

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General

Target

JaffaCakes118_4f492bd924d0c86356dbddf24562c68a.dll
Size

338KB
MD5

4f492bd924d0c86356dbddf24562c68a
SHA1

ab451ac62665a93365a64d1dc3c378e004fa6394
SHA256

7cb66096b63de75922e00368cf0a20e5cfb60ded49953a98a7f908cb33b4c95e
SHA512

138efd1ed632813f4d66f5ebeca00857467f54e5a02c865ebb56320a83fe794e93c5aaa3958ed9f0385c6f0fee92922eab9b0528628b64ef20ff6558cd351f4a
SSDEEP

3072:jDKpt9sSR0HUHPwZWLnWVfEAzV2IJIwTBftpmc+z+f3Q0K:jDgtfRQUHPw06MoV2nwTBlhm8i

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 2080 wrote to memory of 2004	2080	rundll32.exe	28
PID 2080 wrote to memory of 2004	2080	rundll32.exe	28
PID 2080 wrote to memory of 2004	2080	rundll32.exe	28
PID 2080 wrote to memory of 2004	2080	rundll32.exe	28
PID 2080 wrote to memory of 2004	2080	rundll32.exe	28
PID 2080 wrote to memory of 2004	2080	rundll32.exe	28
PID 2080 wrote to memory of 2004	2080	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4f492bd924d0c86356dbddf24562c68a.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2080
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4f492bd924d0c86356dbddf24562c68a.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2004

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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