yunsip | 6b037f5e5d25aa075ca584773e1c855ffcd14c0dd8634027e1900231d2762f6c

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21/10/2024, 23:00

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General

Target

6b037f5e5d25aa075ca584773e1c855ffcd14c0dd8634027e1900231d2762f6cN.dll
Size

869KB
MD5

ce633228dbc41885e4f1b2c79dd3ca90
SHA1

3e8138ac9a63e0a5ebd2f70c296a1596f81f81d3
SHA256

6b037f5e5d25aa075ca584773e1c855ffcd14c0dd8634027e1900231d2762f6c
SHA512

63d372f6b3cc96c6cdece26dad6d4cbb5d13e7b911221727aed4b9c7a6d3ea80c20077e4170751df8ed550046a2315d0d41cb3d506fb4a2c88d0cb16ceb746f2
SSDEEP

3072:jDKpt9sSR0HUHPwZWLnWVfEAzV2IJIwTBftpmc+z+f3Q0Q:jDgtfRQUHPw06MoV2nwTBlhm8Y

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

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 1708 wrote to memory of 1924	1708	rundll32.exe	31
PID 1708 wrote to memory of 1924	1708	rundll32.exe	31
PID 1708 wrote to memory of 1924	1708	rundll32.exe	31
PID 1708 wrote to memory of 1924	1708	rundll32.exe	31
PID 1708 wrote to memory of 1924	1708	rundll32.exe	31
PID 1708 wrote to memory of 1924	1708	rundll32.exe	31
PID 1708 wrote to memory of 1924	1708	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6b037f5e5d25aa075ca584773e1c855ffcd14c0dd8634027e1900231d2762f6cN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1708
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\6b037f5e5d25aa075ca584773e1c855ffcd14c0dd8634027e1900231d2762f6cN.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1924

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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