yunsip | 26ef2630ccc7c94cb467d1b7f62367d116c0e967e64a5f504597b1dd9b9dd650

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16/03/2025, 02:17

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General

Target

JaffaCakes118_7883f7ac13a1d605a1335f37d2b32eb2.dll
Size

414KB
MD5

7883f7ac13a1d605a1335f37d2b32eb2
SHA1

5986a869128bbb109817382a57bf6a48b13cf651
SHA256

26ef2630ccc7c94cb467d1b7f62367d116c0e967e64a5f504597b1dd9b9dd650
SHA512

1003b15a75387d200f3823e6ebd9daaa933950e7090efadb56daf3756c8268fab71fb2bc3f01c60385cb44494d4007f6b1c19ed2928290aa7835bc55cae489a9
SSDEEP

3072:IDKpt9sSR0HUHPwZWLnWVfEAzV2IMwTBftZmc+z+f3Q0h:IDgtfRQUHPw06MoV2dwTBlxm8p

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 2624 wrote to memory of 2908	2624	rundll32.exe	30
PID 2624 wrote to memory of 2908	2624	rundll32.exe	30
PID 2624 wrote to memory of 2908	2624	rundll32.exe	30
PID 2624 wrote to memory of 2908	2624	rundll32.exe	30
PID 2624 wrote to memory of 2908	2624	rundll32.exe	30
PID 2624 wrote to memory of 2908	2624	rundll32.exe	30
PID 2624 wrote to memory of 2908	2624	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7883f7ac13a1d605a1335f37d2b32eb2.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2624
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7883f7ac13a1d605a1335f37d2b32eb2.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2908

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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