b8b7371cde124baf99f1c7fa947906ce7ce72b918a835c43eeadcf356a971c07

General

Target

2024-10-06_a7bf65818d46158c7b30868eefc7e491_bkransomware_karagany.exe
Size

10.9MB
MD5

a7bf65818d46158c7b30868eefc7e491
SHA1

38d4a8f69bc5056d3e73f7c6763099cd02e865c3
SHA256

b8b7371cde124baf99f1c7fa947906ce7ce72b918a835c43eeadcf356a971c07
SHA512

87a6ba10a05162f515292fde7530ed052d08723ad547ea3ce1227168b32cf32d11b7ff904807b0bb019f91198260f2f025b378bdc727ef54eca4425c8adfd023
SSDEEP

196608:PLbYQVG2JOguavkNqkTf9ABa/MXvd4wdbOj93pL2hDcsqjZ72Oz+Arm5g1xFPld0:jbYlQRb8HW4w4lgosWZ6OEyVW

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1544	join.me.exe
2432	LMIGuardianSvc.exe

Loads dropped DLL 1 IoCs

pid	Process
2432	LMIGuardianSvc.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	join.me.exe

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	LMIGuardianSvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-10-06_a7bf65818d46158c7b30868eefc7e491_bkransomware_karagany.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	join.me.exe

Checks processor information in registry 2 TTPs 5 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	join.me.exe
Key queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	join.me.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\	join.me.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	join.me.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	join.me.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1544	join.me.exe
1544	join.me.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1544	join.me.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeCreateGlobalPrivilege	1544	join.me.exe
Token: SeCreateGlobalPrivilege	1544	join.me.exe
Token: SeCreateGlobalPrivilege	2432	LMIGuardianSvc.exe
Token: SeCreateGlobalPrivilege	2432	LMIGuardianSvc.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1544	join.me.exe
1544	join.me.exe
1544	join.me.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3012 wrote to memory of 1544	3012	2024-10-06_a7bf65818d46158c7b30868eefc7e491_bkransomware_karagany.exe	86
PID 3012 wrote to memory of 1544	3012	2024-10-06_a7bf65818d46158c7b30868eefc7e491_bkransomware_karagany.exe	86
PID 3012 wrote to memory of 1544	3012	2024-10-06_a7bf65818d46158c7b30868eefc7e491_bkransomware_karagany.exe	86
PID 1544 wrote to memory of 2432	1544	join.me.exe	87
PID 1544 wrote to memory of 2432	1544	join.me.exe	87
PID 1544 wrote to memory of 2432	1544	join.me.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-10-06_a7bf65818d46158c7b30868eefc7e491_bkransomware_karagany.exe
"C:\Users\Admin\AppData\Local\Temp\2024-10-06_a7bf65818d46158c7b30868eefc7e491_bkransomware_karagany.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3012
- C:\Users\Admin\AppData\Local\Temp\joiB100.tmp\join.me.exe
  "C:\Users\Admin\AppData\Local\Temp\joiB100.tmp\join.me.exe"
  2⤵
  - Executes dropped EXE
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1544
- - C:\Users\Admin\AppData\Local\Temp\joiB100.tmp\LMIGuardianSvc.exe
    C:\Users\Admin\AppData\Local\Temp\joiB100.tmp\LMIGuardianSvc /escort 1544 /CUSTOM JoinMe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2432

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\joiB100.tmp\LMIGuardianDll.dll

Filesize
1.5MB

MD5
3d5b26f5076fbe6e5bfc12170ff9c205

SHA1
2f3402e0413b5d064d9f849dd912f73f6199880c

SHA256
442b9dc4c1ad721da400c7b0539da0d278f41a93740b6913e34b400bec9d1ff7

SHA512
89587a9d40a1f769b6da12dd32fee5bd09c5c93a8a95f0dcca336eb1ab1fe9e94a5895ca6afd359429fa6edf056bd5f971bd9d0b8f009be9d957ca70c2a88904

Download Submit
C:\Users\Admin\AppData\Local\Temp\joiB100.tmp\LMIGuardianSvc.exe

Filesize
402KB

MD5
34259f50b7826e57ebd146e30ad0c587

SHA1
8b77ca40d195c890d1bfc2ed4b346d55f1bbf4d3

SHA256
8603457211df3f9e74277105db2f6ab1915b99a29b1d1ec540d1442ee50313d2

SHA512
c3646523e941d2e6648ea6cc5b52c55feef7bc5d142052f5647b79d92fe5f2693fae3c650a5766a7b2cd9054b2a197886dcf41051d3d8b10c1f1d3b129414524

Download Submit
C:\Users\Admin\AppData\Local\Temp\joiB100.tmp\config.json

Filesize
354B

MD5
3532fc5043716979bf0dba5a5a005fe8

SHA1
9eb6eb7870e498f1e23cfd67cfea22ae48405289

SHA256
71f5b1791c90b2790b93a9ad13554ba3c374ba59d890b28a75fc91873f79d9cf

SHA512
920e3ec1f41ea070030b14b206e15b5ef1dd4f887ede3d07ff7f11c89cb6cab5064b1ce572ba46954aff07d2f5462dbea182d203ed363355deb86a7fae7b2d35

Download Submit
C:\Users\Admin\AppData\Local\Temp\joiB100.tmp\join.me.exe

Filesize
24.3MB

MD5
7736b24ee7c26ef4159f054fa3f416c6

SHA1
eefafe97e7c23009a62124ce9f9f8743b7f1ffd5

SHA256
c69ba65f27e5289195dfb41b462ab3e1e7568d450592d7eba2d88b063ee84395

SHA512
58f1e61fe2eb8627690a53c4de505d2b22033fb135e5d551e29d8d9d4b01e40b54c6c893b287e9f02520f59fa0ac34a818d0e43c88baa3e13b5af90ec5256e1c

Download Submit
C:\Users\Admin\AppData\Local\join.me\join.me.log

Filesize
1KB

MD5
211ab8833831a57461f0869a41fe110e

SHA1
bab83714ee873f737cba9a0bc9bf8e7fab73ce70

SHA256
0cc935d4be465c7fdaff64ebd1cf7d6a57548902f8a709abace668ff08f75f74

SHA512
18e3894457c62002f3def66362223d2c7ccc77810e63677fffeea3836bab70a02a31fb96a466c8efee98937e43ce7b175881e2d2995ad0176c01ac5171ad42f9

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads