a3f84d1b0546b420cba49c889888139fa41b0ae6e92eb3460eec0b6968f2b6e8

General

Target

1a6efbae42b44a188aa27c2b19516819.exe
Size

85KB
MD5

1a6efbae42b44a188aa27c2b19516819
SHA1

16864ed2f4faa8b3b62ffbbe453503d2054cf066
SHA256

a3f84d1b0546b420cba49c889888139fa41b0ae6e92eb3460eec0b6968f2b6e8
SHA512

bbdf11611a68ddcbfe5a61b597a42eec86ae64e7688682f6421f62fe5fb5587e9ad095f4f4fb8640b2ffa470888c10955fce85a61217fbf6e72112fdc1b4ac2a
SSDEEP

1536:SKcR4mjD9r823F0wzwO19i+2E3ctLxiKFaBNaHIwQkdtQY3cRPwmTXhxid:SKcWmjRrz3aw0620chxiKMmHxqY3CwI0

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2344	drXjcMWs67izrnO.exe
2872	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 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1420-0-0x00000000006D0000-0x00000000006E7000-memory.dmp	upx
behavioral2/files/0x000800000002313d-6.dat	upx
behavioral2/memory/2872-7-0x0000000000C50000-0x0000000000C67000-memory.dmp	upx
behavioral2/memory/1420-8-0x00000000006D0000-0x00000000006E7000-memory.dmp	upx
behavioral2/files/0x0003000000022707-13.dat	upx
behavioral2/memory/2872-40-0x0000000000C50000-0x0000000000C67000-memory.dmp	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"	1a6efbae42b44a188aa27c2b19516819.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	1a6efbae42b44a188aa27c2b19516819.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	1420	1a6efbae42b44a188aa27c2b19516819.exe
Token: SeDebugPrivilege	2872	CTS.exe
Token: SeBackupPrivilege	4808	dw20.exe
Token: SeBackupPrivilege	4808	dw20.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1420 wrote to memory of 2344	1420	1a6efbae42b44a188aa27c2b19516819.exe	92
PID 1420 wrote to memory of 2344	1420	1a6efbae42b44a188aa27c2b19516819.exe	92
PID 1420 wrote to memory of 2872	1420	1a6efbae42b44a188aa27c2b19516819.exe	94
PID 1420 wrote to memory of 2872	1420	1a6efbae42b44a188aa27c2b19516819.exe	94
PID 1420 wrote to memory of 2872	1420	1a6efbae42b44a188aa27c2b19516819.exe	94
PID 2344 wrote to memory of 4808	2344	drXjcMWs67izrnO.exe	96
PID 2344 wrote to memory of 4808	2344	drXjcMWs67izrnO.exe	96

C:\Users\Admin\AppData\Local\Temp\1a6efbae42b44a188aa27c2b19516819.exe
"C:\Users\Admin\AppData\Local\Temp\1a6efbae42b44a188aa27c2b19516819.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1420
- C:\Users\Admin\AppData\Local\Temp\drXjcMWs67izrnO.exe
  C:\Users\Admin\AppData\Local\Temp\drXjcMWs67izrnO.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2344
- - C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
    dw20.exe -x -s 732
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:4808
- 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:2872

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
352KB

MD5
e0dafe3cdcf503169e9f03b0318f0145

SHA1
7435a6ccb4585850ccb073991202523b3d3770f8

SHA256
3d8c4e9f066856defc25cdd11591b9083aa683f018f6d2d4dbb0884782a9b00e

SHA512
777d12cda568af5367d0ecd44c7817c46f9cb65749666280f999d312cd37d4e514fc91e0fe16ab32baf8d2682bf135a00e61e76b6de475605a2eac1d540bbd24

Download Submit
C:\Users\Admin\AppData\Local\Temp\drXjcMWs67izrnO.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/1420-0-0x00000000006D0000-0x00000000006E7000-memory.dmp

Filesize
92KB

Download
memory/1420-8-0x00000000006D0000-0x00000000006E7000-memory.dmp

Filesize
92KB

Download
memory/2344-27-0x00007FFE08820000-0x00007FFE091C1000-memory.dmp

Filesize
9.6MB

Download
memory/2344-30-0x00007FFE08820000-0x00007FFE091C1000-memory.dmp

Filesize
9.6MB

Download
memory/2344-31-0x0000000001790000-0x00000000017A0000-memory.dmp

Filesize
64KB

Download
memory/2344-39-0x00007FFE08820000-0x00007FFE091C1000-memory.dmp

Filesize
9.6MB

Download
memory/2872-7-0x0000000000C50000-0x0000000000C67000-memory.dmp

Filesize
92KB

Download
memory/2872-40-0x0000000000C50000-0x0000000000C67000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads