61cec0be18c137cf6fe63f42d22fa1b51ec5d1c0a886d3d871ac899f34433654

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
27/01/2025, 15:48

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General

Target
JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe
Size 40KB
Sample250127-s89f5swpfl
SHA256 61cec0be18c137cf6fe63f42d22fa1b51ec5d1c0a886d3d871ac899f34433654
MD5 41316d4515900c4d6e79bae57676acb6
SHA1 633a9d9f0baa91bda695dee0b0d9528e09eeee07
SHA512 bcd454ab887e157ef066ca771ba3c08e1133bfef928a292784b954d91497a376b6f7ac040873bcbb746138685c6577302f17d6e16bae03593c90c3cc7d7210d9
SSDEEP 768:B5EdYSfe8wyHRV5CwsfDu3HvUSPfml8jCcAhC:B5EdY6e/yHRrCwOR848WcAI
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

defense_evasion discovery

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe

Loads dropped DLL 1 IoCs

pid	Process
4764	rundll32.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\RvmctjC.dll	JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1120	4764	WerFault.exe	83

System Location Discovery: System Language Discovery 1 TTPs 3 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 4764	2680	JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe	83
PID 2680 wrote to memory of 4764	2680	JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe	83
PID 2680 wrote to memory of 4764	2680	JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe	83
PID 2680 wrote to memory of 4780	2680	JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe	87
PID 2680 wrote to memory of 4780	2680	JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe	87
PID 2680 wrote to memory of 4780	2680	JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe	87

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_41316d4515900c4d6e79bae57676acb6.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Windows\system32\RvmctjC.dll Install
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:4764
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4764 -s 560
    3⤵
    - Program crash
    PID:1120
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\JAFFAC~1.EXE >> NUL
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4764 -ip 4764
1⤵
PID:2612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

RvmctjC.dll

Path C:\Windows\SysWOW64\RvmctjC.dll
Size 43KB
SHA256 a514679b735fc90d27cd2eceaf2d17ac0aab9608d80d9373104502d3614b10c6
MD5 114d66fb9fe4bee297a2bbae506cc1cd
SHA1 53c8ce788322fda62e473d5df1c09116b952de15
SHA512 0ab118ce5bae25f1753b06dc89f10662fe68ae301675c68c226bab8b3f63611fa555d3a3f7f78b6161a967c7b46d1aebbd42f11080538f0cc43f93f404baec26
SSDEEP 384:Z34GWyHRV5CoEi/RefIDQRS53HvtwXF+tEMPfFUxAIEsYUE3He6xXX2xKMc5s1LQ:KyHRV5CwsfDu3HvUSPfml8jCcAh2
MD5 SHA1 SHA512 SSDEEP

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memory/2680-0-0x0000000000400000-0x000000000040C970-memory.dmp

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memory/2680-5-0x0000000000400000-0x000000000040C970-memory.dmp

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memory/4764-4-0x0000000010000000-0x000000001000B000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads