blackmoon | 9211b7897def9171f9dbd169d46ba570af8af03a55bd55ef9fb872cc0ff3c6a1

Analysis

max time kernel
92s
max time network
113s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
02/04/2025, 02:32

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General

Target

yunyu.dll
Size

5.2MB
MD5

35e70d317ab1ba60288330688c93b131
SHA1

03c00ffbcd4ab8038ea1cf032291fc3e716a1a76
SHA256

9211b7897def9171f9dbd169d46ba570af8af03a55bd55ef9fb872cc0ff3c6a1
SHA512

74f03ac5f960cab040514d3daefa0c4466055e4d97e8238810442c84b2bac5584ffd88be6a7375b2e124b7d6041d732e6276b91245126714da8b23c5b66a29c3
SSDEEP

98304:JsAld9NFt0paacMXCTZlrxDmAFWueTLNfaEON:JsAlBgaBMwZldFWT5faEa

Score

10^/10

blackmoon banker discovery trojan

Malware Config

Signatures

Blackmoon family
blackmoon
Blackmoon, KrBanker
Blackmoon also known as KrBanker is banking trojan first discovered in early 2014.
trojan banker blackmoon

Detect Blackmoon payload 3 IoCs

resource	yara_rule
behavioral1/memory/4676-0-0x0000000010000000-0x0000000010550000-memory.dmp	family_blackmoon
behavioral1/memory/4676-2-0x0000000010000000-0x0000000010550000-memory.dmp	family_blackmoon
behavioral1/memory/4676-3-0x0000000010000000-0x0000000010550000-memory.dmp	family_blackmoon

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4820	4676	WerFault.exe	85

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 behavior: EnumeratesProcesses 4 IoCs

pid	Process
4676	rundll32.exe
4676	rundll32.exe
4676	rundll32.exe
4676	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 4676	2092	rundll32.exe	85
PID 2092 wrote to memory of 4676	2092	rundll32.exe	85
PID 2092 wrote to memory of 4676	2092	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\yunyu.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\yunyu.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4676
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4676 -s 752
    3⤵
    - Program crash
    PID:4820

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4676 -ip 4676
1⤵
PID:920

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

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Downloads

memory/4676-0-0x0000000010000000-0x0000000010550000-memory.dmp

Filesize
5.3MB

Download
memory/4676-2-0x0000000010000000-0x0000000010550000-memory.dmp

Filesize
5.3MB

Download
memory/4676-1-0x000000001004F000-0x0000000010050000-memory.dmp

Filesize
4KB

Download
memory/4676-3-0x0000000010000000-0x0000000010550000-memory.dmp

Filesize
5.3MB

Download