ea6f01132d75d8beea01ccd42ddf42501cff90c6f7db2e83526600d689e3c931

General

Target

2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe
Size

135KB
MD5

f81b59d631c1421ecbfa5d631a7dbedb
SHA1

02cb93d524caa36e45b65e6f7de29965cf8f194e
SHA256

ea6f01132d75d8beea01ccd42ddf42501cff90c6f7db2e83526600d689e3c931
SHA512

c360809d1e00b7391b68ba553ac877c2cdb49c661f1c02a4c259f988db0c66e4d887a1a3f7af78f77dcb94769c92f432abc072269a579891c452d8d959aefc3f
SSDEEP

3072:ZRpAyazIliazT9i+P+AupTruo7UnQKLbTRt:xZ8azpi+cxRU

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

CTS.exeWJJWaDjUgr56wCz.exe

pid process

2456 CTS.exe
1908 WJJWaDjUgr56wCz.exe
Loads dropped DLL 2 IoCs

Processes:

2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe

pid process

1900 2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe
1900 2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

pid	process
2456	CTS.exe
1908	WJJWaDjUgr56wCz.exe

pid	process
1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe
1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1900 2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe
Token: SeDebugPrivilege 2456 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe
Token: SeDebugPrivilege	2456	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe

description	pid	process	target process
PID 1900 wrote to memory of 1908	1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe	WJJWaDjUgr56wCz.exe
PID 1900 wrote to memory of 1908	1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe	WJJWaDjUgr56wCz.exe
PID 1900 wrote to memory of 1908	1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe	WJJWaDjUgr56wCz.exe
PID 1900 wrote to memory of 1908	1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe	WJJWaDjUgr56wCz.exe
PID 1900 wrote to memory of 2456	1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe	CTS.exe
PID 1900 wrote to memory of 2456	1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe	CTS.exe
PID 1900 wrote to memory of 2456	1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe	CTS.exe
PID 1900 wrote to memory of 2456	1900	2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_f81b59d631c1421ecbfa5d631a7dbedb_bkransomware.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1900

C:\Users\Admin\AppData\Local\Temp\WJJWaDjUgr56wCz.exe
C:\Users\Admin\AppData\Local\Temp\WJJWaDjUgr56wCz.exe
2⤵
- Executes dropped EXE
PID:1908

C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:2456

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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\Users\Admin\AppData\Local\Temp\WJJWaDjUgr56wCz.exe

Filesize
64KB

MD5
a32a382b8a5a906e03a83b4f3e5b7a9b

SHA1
11e2bdd0798761f93cce363329996af6c17ed796

SHA256
75f12ea2f30d9c0d872dade345f30f562e6d93847b6a509ba53beec6d0b2c346

SHA512
ec87dd957be21b135212454646dcabdd7ef9442cf714e2c1f6b42b81f0c3fa3b1875bde9a8b538e8a0aa2190225649c29e9ed0f25176e7659e55e422dd4efe4c

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads