yunsip | f2b85ff865f026b35d8962343207fc1886ce1a35ffbf8738e5d6d91e97f9d0e4

Analysis

max time kernel
14s
max time network
18s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
03/03/2025, 20:36

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General

Target

JaffaCakes118_49055392299563dbfd7240e0d96d8d86.dll
Size

305KB
MD5

49055392299563dbfd7240e0d96d8d86
SHA1

aefd29d2691fa61fdab6c9d20eb895002c2f4103
SHA256

f2b85ff865f026b35d8962343207fc1886ce1a35ffbf8738e5d6d91e97f9d0e4
SHA512

972351c78ba51360ab144fdd5d778c2593782ae691d560b3b4a092b81d3323ef8a9188fba0a5d998177804a751cc5fb0dfd5c06c5c3c7c6f9a6a7c5aa60f6f93
SSDEEP

3072:jDKpt9sSR0HUHPwZWLnWVfEAzV2IJIwTBftpmc+z+f3Q0E:jDgtfRQUHPw06MoV2nwTBlhm8s

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 2236 wrote to memory of 2264	2236	rundll32.exe	29
PID 2236 wrote to memory of 2264	2236	rundll32.exe	29
PID 2236 wrote to memory of 2264	2236	rundll32.exe	29
PID 2236 wrote to memory of 2264	2236	rundll32.exe	29
PID 2236 wrote to memory of 2264	2236	rundll32.exe	29
PID 2236 wrote to memory of 2264	2236	rundll32.exe	29
PID 2236 wrote to memory of 2264	2236	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_49055392299563dbfd7240e0d96d8d86.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_49055392299563dbfd7240e0d96d8d86.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2264

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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