e771c5bef31c1955ee0e87e9220fe5d14db5507f28c46e92f0d4272daf233884

General

Target

b40dcdeb387d82b8061905dcc4d99599.exe
Size

85KB
MD5

b40dcdeb387d82b8061905dcc4d99599
SHA1

0c69673b4a0f9daaa8fb5741f7267609768ff464
SHA256

e771c5bef31c1955ee0e87e9220fe5d14db5507f28c46e92f0d4272daf233884
SHA512

0a92a63572774edadbc832ea359c1576fbcd11db793f5ea73d6af35f7e6b7e3d0a1ab48213c09144be34951153d8b07c14ed9558175d3bcceadcaa95ad97a22c
SSDEEP

1536:SKcR4mjD9r823FBBXVl/skYzGwG0Z9OivBtLy0+E8+khn7a1C+gx0XnIVOEJ8:SKcWmjRrz3tXjUdGj0Z9OivLWocEux7s

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1928	ZiOIopyNksOKwB7.exe
1408	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

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4736-0-0x0000000000390000-0x00000000003A7000-memory.dmp	upx
behavioral2/files/0x0007000000023232-6.dat	upx
behavioral2/memory/4736-8-0x0000000000390000-0x00000000003A7000-memory.dmp	upx
behavioral2/memory/1408-9-0x0000000000F20000-0x0000000000F37000-memory.dmp	upx
behavioral2/files/0x0003000000022768-13.dat	upx

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"	b40dcdeb387d82b8061905dcc4d99599.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

description	ioc	Process
File created	C:\Windows\CTS.exe	b40dcdeb387d82b8061905dcc4d99599.exe
File created	C:\Windows\CTS.exe	CTS.exe

Checks processor information in registry 2 TTPs 3 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	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4736	b40dcdeb387d82b8061905dcc4d99599.exe
Token: SeDebugPrivilege	1408	CTS.exe
Token: SeBackupPrivilege	4844	dw20.exe
Token: SeBackupPrivilege	4844	dw20.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 1928	4736	b40dcdeb387d82b8061905dcc4d99599.exe	90
PID 4736 wrote to memory of 1928	4736	b40dcdeb387d82b8061905dcc4d99599.exe	90
PID 4736 wrote to memory of 1408	4736	b40dcdeb387d82b8061905dcc4d99599.exe	92
PID 4736 wrote to memory of 1408	4736	b40dcdeb387d82b8061905dcc4d99599.exe	92
PID 4736 wrote to memory of 1408	4736	b40dcdeb387d82b8061905dcc4d99599.exe	92
PID 1928 wrote to memory of 4844	1928	ZiOIopyNksOKwB7.exe	94
PID 1928 wrote to memory of 4844	1928	ZiOIopyNksOKwB7.exe	94

C:\Users\Admin\AppData\Local\Temp\b40dcdeb387d82b8061905dcc4d99599.exe
"C:\Users\Admin\AppData\Local\Temp\b40dcdeb387d82b8061905dcc4d99599.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Users\Admin\AppData\Local\Temp\ZiOIopyNksOKwB7.exe
  C:\Users\Admin\AppData\Local\Temp\ZiOIopyNksOKwB7.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1928
- - C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
    dw20.exe -x -s 816
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:4844
- 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:1408

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

2

T1012

System Information Discovery

2

T1082

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
354KB

MD5
c21ee93e032e67d43c2b52bf40067493

SHA1
48f796e5f104f364ff24557cb510c08eefd706b5

SHA256
97d5760bc0e4bf4fa6ca88db7aa7e5b90b7db06c9e3144db158801c50bdfa039

SHA512
b9de8caafbc1f0344c20da3100615fee6d8ad899d6885edc738cf3f61a4abcd5483792ada3ac7d2c7a973e22ea8a9caff41153d78ac19c87fdb8ebeace425492

Download Submit
C:\Users\Admin\AppData\Local\Temp\ZiOIopyNksOKwB7.exe

Filesize
56KB

MD5
e115521ba14b75f53dcdff087ec6898f

SHA1
87103a892bb514a93d485fba221bacb9da3aae25

SHA256
59b284d0ad4c2634938e70fae67d9048bd98422d052fbd745a9b80b5fae7ae29

SHA512
ab3d097bcf11bf7327a28124052b210f5fb13b9bfb9b7376cae1ba5c30182a330506935288a7fe06b7e3fdd82b57f5c31638f1c301738342819c772b346fa35a

Download Submit
C:\Windows\CTS.exe

Filesize
29KB

MD5
70aa23c9229741a9b52e5ce388a883ac

SHA1
b42683e21e13de3f71db26635954d992ebe7119e

SHA256
9d25cc704b1c00c9d17903e25ca35c319663e997cb9da0b116790b639e9688f2

SHA512
be604a2ad5ab8a3e5edb8901016a76042ba873c8d05b4ef8eec31241377ec6b2a883b51c6912dc7640581ffa624547db334683975883ae74e62808b5ae9ab0b5

Download Submit
memory/1408-9-0x0000000000F20000-0x0000000000F37000-memory.dmp

Filesize
92KB

Download
memory/1928-28-0x00000000013E0000-0x00000000013F0000-memory.dmp

Filesize
64KB

Download
memory/1928-27-0x00007FFFC43B0000-0x00007FFFC4D51000-memory.dmp

Filesize
9.6MB

Download
memory/1928-29-0x00007FFFC43B0000-0x00007FFFC4D51000-memory.dmp

Filesize
9.6MB

Download
memory/1928-40-0x00007FFFC43B0000-0x00007FFFC4D51000-memory.dmp

Filesize
9.6MB

Download
memory/4736-0-0x0000000000390000-0x00000000003A7000-memory.dmp

Filesize
92KB

Download
memory/4736-8-0x0000000000390000-0x00000000003A7000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads