b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a

Analysis

max time kernel
46s
max time network
52s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
05/12/2022, 07:00

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General

Target

b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe
Size

477KB
MD5

acf13908b651c82d76391dda3574c6e0
SHA1

ff0d66a8e6b6ab2ea79cf5e4962047098b82a4ba
SHA256

b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a
SHA512

2cc12305e375ff980a6edb39f676a90e249d76becfa0646f90623104a90229fc2af28feb10c08b6e4c32debbdcf9d67aa19e389352e70f7c75358fd9257533bf
SSDEEP

12288:w8blFZ0oXr/5NliDenCEkvjnVwEvLPwzJzu9OX2Ukx5vcEi0/3IWV2//c9Yc:w8blFZ0oXrHkjVwEvLPg3/O

Score

8^/10

evasion persistence

Malware Config

Signatures

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\disableregistrytools = "1"	reg.exe

Disables Task Manager via registry modification
evasion

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File created	C:\WINDOWS\SysWOW64\drivers\config.sys	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\SVXHOST = "C:\\Windows\\system32\\svxhost.exe"	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\svxhost.exe	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe
File opened for modification	C:\Windows\SysWOW64\svxhost.exe	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe
File opened for modification	C:\WINDOWS\SysWOW64\log.txt	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\WINDOWS\fresh.cmd	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe
File created	C:\WINDOWS\up.cmd	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe
File created	C:\WINDOWS\syf.cmd	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe

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

System Information Discovery
T1082

Runs .reg file with regedit 1 IoCs

pid	Process
1756	regedit.exe

Runs net.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1376 wrote to memory of 1948	1376	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe	27
PID 1376 wrote to memory of 1948	1376	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe	27
PID 1376 wrote to memory of 1948	1376	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe	27
PID 1376 wrote to memory of 1948	1376	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe	27
PID 1376 wrote to memory of 996	1376	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe	28
PID 1376 wrote to memory of 996	1376	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe	28
PID 1376 wrote to memory of 996	1376	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe	28
PID 1376 wrote to memory of 996	1376	b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe	28
PID 1948 wrote to memory of 544	1948	cmd.exe	32
PID 1948 wrote to memory of 544	1948	cmd.exe	32
PID 1948 wrote to memory of 544	1948	cmd.exe	32
PID 1948 wrote to memory of 544	1948	cmd.exe	32
PID 996 wrote to memory of 1896	996	cmd.exe	31
PID 996 wrote to memory of 1896	996	cmd.exe	31
PID 996 wrote to memory of 1896	996	cmd.exe	31
PID 996 wrote to memory of 1896	996	cmd.exe	31
PID 1896 wrote to memory of 1768	1896	net.exe	33
PID 1896 wrote to memory of 1768	1896	net.exe	33
PID 1896 wrote to memory of 1768	1896	net.exe	33
PID 1896 wrote to memory of 1768	1896	net.exe	33
PID 996 wrote to memory of 1716	996	cmd.exe	34
PID 996 wrote to memory of 1716	996	cmd.exe	34
PID 996 wrote to memory of 1716	996	cmd.exe	34
PID 996 wrote to memory of 1716	996	cmd.exe	34
PID 1716 wrote to memory of 1164	1716	net.exe	35
PID 1716 wrote to memory of 1164	1716	net.exe	35
PID 1716 wrote to memory of 1164	1716	net.exe	35
PID 1716 wrote to memory of 1164	1716	net.exe	35
PID 996 wrote to memory of 1756	996	cmd.exe	36
PID 996 wrote to memory of 1756	996	cmd.exe	36
PID 996 wrote to memory of 1756	996	cmd.exe	36
PID 996 wrote to memory of 1756	996	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe
"C:\Users\Admin\AppData\Local\Temp\b77420a16dc2e3bed70e63fb428ff66c51ba35902c4467b86804e43d6d26b03a.exe"
1⤵
- Drops file in Drivers directory
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1376
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\WINDOWS\syf.cmd" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1948
- - C:\Windows\SysWOW64\reg.exe
    reg add HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v disableregistrytools /t REG_DWORD /d 1 /f
    3⤵
    - Disables RegEdit via registry modification
    PID:544
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\WINDOWS\up.cmd" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:996
- - C:\Windows\SysWOW64\net.exe
    net stop Security Center
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1896
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop Security Center
      4⤵
      PID:1768
- - C:\Windows\SysWOW64\net.exe
    net stop SharedAccess
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1716
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 stop SharedAccess
      4⤵
      PID:1164
- - C:\Windows\SysWOW64\regedit.exe
    REGEDIT /S C:\Users\Admin\AppData\Local\Temp.\kij.reg
    3⤵
    - Runs .reg file with regedit
    PID:1756

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kij.reg

Filesize
277B

MD5
760776cff6f8d1efeb385795571eab6b

SHA1
d46945b4718ec40a04817473db3b3a8aed04e4cf

SHA256
7e1d14fa4078548b582f6767d786c82b1162333993ce68ba812a26671f6d0d0c

SHA512
cf72f32cd041d2ec728a9099453c4c105b691bd7fd839823e449dc852d39e7d38de61f1856f9e64ef5067cf967903c9a449a41450014507fb9510fbad1f3d3df

Download Submit
C:\WINDOWS\syf.cmd

Filesize
146B

MD5
98909a52071d95321d93fb925a6a08c6

SHA1
3005d9f32dbaafd9b635165706cfaf1ee845259f

SHA256
6e505012e027a6d94bdbdc62008ed3188cb50768afc8cfa045ea82c4775f4ea9

SHA512
ff7cfeebe358375a0f1492d240b47787f5632228fc40cdc606f37c420dbd99b83bd375e77fb4b6f53af7c6990a859f58fdd1d67c4a02ba0fa970fe409de24524

Download Submit
C:\WINDOWS\up.cmd

Filesize
659B

MD5
3317900ab5df93f2b01c17e2419c1416

SHA1
50835be300f4188de57777610bd113e3177b3e78

SHA256
50685526578bcbccfbae644ea19d63b3c87a312fecbfde8ca81ed58249a5b6ac

SHA512
96bcdd5afcdb97b2d51d25d784824518b7df346189b3f0f43573236e0bd841daeb70a8e1e368d8bc8025a1cef4fac6aebc36382679492c78d4f56b95333b2614

Download Submit
memory/1376-54-0x0000000075091000-0x0000000075093000-memory.dmp

Filesize
8KB

Download