2b747b3f33a8ff5a2651812d5bbf85ac63788da27c1089c1ae7daabf4efa7ddc

General

Target

2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe
Size

13.3MB
MD5

07deeb9cb6c401f8cc1d621166a03db5
SHA1

091e98cac463aebd96665ef5f767ddc583692c14
SHA256

2b747b3f33a8ff5a2651812d5bbf85ac63788da27c1089c1ae7daabf4efa7ddc
SHA512

0ba72849ab7d09a9e580d8fe1857fa8f939be7c05c6ef3369973e1bc0c2d65a8718c69aab215b89f0aa6c7b99935d8c3f9b1e15f641f6d0342f07ded45ad7e9c
SSDEEP

196608:Sid8YlRU4Vw3vMPP+uGmmAsj3hycvrd4T3RA4wWYSe63FFVQTeMtnMKfYS+ouKn:JvlRUPx5ZRycvrg2GNVF4/yQR

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
1236	HZgWenWhyp98pSb.exe
4048	CTS.exe
2756	HZgWenWhyp98pSb.exe

Loads dropped DLL 1 IoCs

pid	Process
2756	HZgWenWhyp98pSb.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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4796	2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe
Token: SeDebugPrivilege	4048	CTS.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4796 wrote to memory of 1236	4796	2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe	91
PID 4796 wrote to memory of 1236	4796	2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe	91
PID 4796 wrote to memory of 1236	4796	2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe	91
PID 4796 wrote to memory of 4048	4796	2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe	92
PID 4796 wrote to memory of 4048	4796	2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe	92
PID 4796 wrote to memory of 4048	4796	2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe	92
PID 1236 wrote to memory of 2756	1236	HZgWenWhyp98pSb.exe	93
PID 1236 wrote to memory of 2756	1236	HZgWenWhyp98pSb.exe	93
PID 1236 wrote to memory of 2756	1236	HZgWenWhyp98pSb.exe	93

C:\Users\Admin\AppData\Local\Temp\2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_07deeb9cb6c401f8cc1d621166a03db5_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Users\Admin\AppData\Local\Temp\HZgWenWhyp98pSb.exe
  C:\Users\Admin\AppData\Local\Temp\HZgWenWhyp98pSb.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1236
- - C:\Windows\Temp\{A740607D-C2B9-481E-B6F1-42D50B32341B}\.cr\HZgWenWhyp98pSb.exe
    "C:\Windows\Temp\{A740607D-C2B9-481E-B6F1-42D50B32341B}\.cr\HZgWenWhyp98pSb.exe" -burn.clean.room="C:\Users\Admin\AppData\Local\Temp\HZgWenWhyp98pSb.exe" -burn.filehandle.attached=536 -burn.filehandle.self=532
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:2756
- 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:4048

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=1036 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
1⤵
PID:4212

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

Query Registry

1

T1012

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
789KB

MD5
c87ba9c50d92e8c8dc814ab4706df1b3

SHA1
32736261da8f3babc56bb3b8ad82cda2f711e1bb

SHA256
b7c3ce58935d83daa25730c922136c053b1f39cd85531b22d4866d81a3398a94

SHA512
17187fe50d6101493d32dc542be7228c758885f17265194dba4f1b68c1f2aa00a1fcade89ccf14a20b0f9d73059b4bca63ce5d0d2885c49cea4e5b119aa81bb7

Download Submit
C:\Users\Admin\AppData\Local\Temp\HZgWenWhyp98pSb.exe

Filesize
13.2MB

MD5
ca8c521c30f57c0c199d526b9a23fc4a

SHA1
663399541a7d3bb1b5ea0e57a00c024e50d8506c

SHA256
8ae59d82845159db3a70763f5cb1571e45ebf6a1adfecc47574ba17b019483a0

SHA512
28cf976fa51e4c7abb57fd8fcde6381f1e140407924ef265fde6e59546fb6fdeb803f388a5d1e9e74fb80d47ce5fd9f275aaf41258a09002fba27c2cbbc2df4d

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
C:\Windows\Temp\{A740607D-C2B9-481E-B6F1-42D50B32341B}\.cr\HZgWenWhyp98pSb.exe

Filesize
634KB

MD5
2389d29f633df11642dff1bf5f21eb35

SHA1
ce85460fd7cde25528142f4cdca4e6013bb4b1e8

SHA256
ab91fbaab09a94839ba839275338ac42fe2661781d371e517f9b2e4866e2cc55

SHA512
59d607112566d13d15a8de8e18be204e8bf0d2010310ebc9c8589ceb42fb8fce7800a6e58f30ffb92d4c1b3e0d17c1a2076a478de753e5334971465c52f8eeed

Download Submit
C:\Windows\Temp\{C0B1DA2C-E0F4-4C73-A01E-BC8DAAB336E5}\.ba\logo.png

Filesize
1KB

MD5
d6bd210f227442b3362493d046cea233

SHA1
ff286ac8370fc655aea0ef35e9cf0bfcb6d698de

SHA256
335a256d4779ec5dcf283d007fb56fd8211bbcaf47dcd70fe60ded6a112744ef

SHA512
464aaab9e08de610ad34b97d4076e92dc04c2cdc6669f60bfc50f0f9ce5d71c31b8943bd84cee1a04fb9ab5bbed3442bd41d9cb21a0dd170ea97c463e1ce2b5b

Download Submit
C:\Windows\Temp\{C0B1DA2C-E0F4-4C73-A01E-BC8DAAB336E5}\.ba\wixstdba.dll

Filesize
191KB

MD5
eab9caf4277829abdf6223ec1efa0edd

SHA1
74862ecf349a9bedd32699f2a7a4e00b4727543d

SHA256
a4efbdb2ce55788ffe92a244cb775efd475526ef5b61ad78de2bcdfaddac7041

SHA512
45b15ade68e0a90ea7300aeb6dca9bc9e347a63dba5ce72a635957564d1bdf0b1584a5e34191916498850fc7b3b7ecfbcbfcb246b39dbf59d47f66bc825c6fd2

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads