1abd9bd62e477f870455e328184177daa4f635c49b4054fd0b2bb55cb5b7ba68

General

Target

2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe
Size

214KB
MD5

c5a9fa2474887be17c328652b3d30c58
SHA1

82445294c29a3d0befeb9152f045b6a29f2faa99
SHA256

1abd9bd62e477f870455e328184177daa4f635c49b4054fd0b2bb55cb5b7ba68
SHA512

b8f37be0cbb58daa3e86ec68b865a068b656c8e2ff637bf3cd26d672dd3f63524843648514edd66faa3ee7393870694e75efa285a8303583cca41c5a5d5c52e4
SSDEEP

6144:hZMazPbXIiwHzzwSZwwSG5hV7pzLP3NPh1QbMW:hS0PczzwS665rVvNJ1u

Score

9^/10

persistence spyware stealer

Malware Config

Signatures

Detects executables containing bas64 encoded gzip files 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4352-12-0x00007FFFD6D20000-0x00007FFFD77E1000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_Embedded_Gzip_B64Encoded_File

Executes dropped EXE 2 IoCs

Processes:

EdObAAHXypLz8gB.exeCTS.exe

pid process

4352 EdObAAHXypLz8gB.exe
1724 CTS.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
4352	EdObAAHXypLz8gB.exe
1724	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_c5a9fa2474887be17c328652b3d30c58_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:

2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 5112 2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe
Token: SeDebugPrivilege 1724 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	5112	2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe
Token: SeDebugPrivilege	1724	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe

description	pid	process	target process
PID 5112 wrote to memory of 4352	5112	2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe	EdObAAHXypLz8gB.exe
PID 5112 wrote to memory of 4352	5112	2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe	EdObAAHXypLz8gB.exe
PID 5112 wrote to memory of 1724	5112	2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe	CTS.exe
PID 5112 wrote to memory of 1724	5112	2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe	CTS.exe
PID 5112 wrote to memory of 1724	5112	2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_c5a9fa2474887be17c328652b3d30c58_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5112

C:\Users\Admin\AppData\Local\Temp\EdObAAHXypLz8gB.exe
C:\Users\Admin\AppData\Local\Temp\EdObAAHXypLz8gB.exe
2⤵
- Executes dropped EXE
PID:4352

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:1724

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3960 --field-trial-handle=3088,i,14310325015283915034,7660943942870463106,262144 --variations-seed-version /prefetch:8
1⤵
PID:1860

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
789KB

MD5
d2eaa80b90a1a8a6b83c0c9f49df5843

SHA1
6f665e6eeb7689030dc7c3a1afdb1299d2b0b9c3

SHA256
c466618a64bb774f8d69229226db23cba960e409bb86dd4affebe3ed6c56ebad

SHA512
ce44bbc018222367c5e0bc37b9ae8de1919e81eb996faa7b74436a91743dd7dc8aa6c8585601b2c50e0f3326fca8ff3c160635e259078115e68b769e2967dc67

Download Submit
C:\Users\Admin\AppData\Local\Temp\EdObAAHXypLz8gB.exe
Filesize
143KB

MD5
c1d5e48111f4984433e6318466ee1bce

SHA1
d3379a99f504b38794f491e4fff6c77cfab53eac

SHA256
dfdf187874d7368a92bbebb68c8cdc5c183af47d954b5b27ddaeca6774ae4822

SHA512
dfce97a9dc92521c2d576b3d21071cb04df4a6d927676a2b95abc0093b67a044aab8d3f8612a4a70f9128cf2555d3a554a1c3f941647a64d30298ab28bba7441

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/4352-8-0x0000000000EC0000-0x0000000000EE8000-memory.dmp

Filesize
160KB

Download
memory/4352-12-0x00007FFFD6D20000-0x00007FFFD77E1000-memory.dmp

Filesize
10.8MB

Download
memory/4352-34-0x00007FFFD6D20000-0x00007FFFD77E1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads