yunsip | f173c86ebdbe7eab2f23bc4e66910fe72f9c0220ae09b2bfde838381a2b876c6

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14/03/2025, 13:45

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General

Target

f173c86ebdbe7eab2f23bc4e66910fe72f9c0220ae09b2bfde838381a2b876c6.dll
Size

816KB
MD5

20f214a790dc5038fd45f4242b25d07b
SHA1

cd96698cc39b55f02acae824b65adf6c58338dec
SHA256

f173c86ebdbe7eab2f23bc4e66910fe72f9c0220ae09b2bfde838381a2b876c6
SHA512

db9c6275d59ad660f788213aff5ae01af8968e84df60af5af84dc2fe3aefd7ddd5bf537bab1d090b4a8fbb0cc8bc040489c349919dcf96e22a8de4ec74a57476
SSDEEP

6144:o6C5AXbMn7UI1FoV2gwTBlrIckPJYYYYYYYYYYYYS:o6RI1Fo/wT3cJYYYYYYYYYYYYS

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 2140 wrote to memory of 1564	2140	rundll32.exe	31
PID 2140 wrote to memory of 1564	2140	rundll32.exe	31
PID 2140 wrote to memory of 1564	2140	rundll32.exe	31
PID 2140 wrote to memory of 1564	2140	rundll32.exe	31
PID 2140 wrote to memory of 1564	2140	rundll32.exe	31
PID 2140 wrote to memory of 1564	2140	rundll32.exe	31
PID 2140 wrote to memory of 1564	2140	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f173c86ebdbe7eab2f23bc4e66910fe72f9c0220ae09b2bfde838381a2b876c6.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2140
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f173c86ebdbe7eab2f23bc4e66910fe72f9c0220ae09b2bfde838381a2b876c6.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1564

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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