c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d

General

Target

c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe
Size

386KB
MD5

8b7a4c06d8fda99099e8a11c8273b8e9
SHA1

9f60b2cee08ff473a9d8e50838857e0ee09be8ea
SHA256

c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d
SHA512

3443dd21fc81fc30c92ec3240a8f0e09531774f7c0a80bf1b2e5f698cd783e509accfdaa64972f46c52ae57dc0c6417f1117220d240308c276b07c70d50831fe
SSDEEP

12288:y2SaqAob212fQj5dmKVxp3pl2nT3gpC5+vkhpoHh:y2SMoRIVdmkp3pIgpKp4

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
784	cssrs.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2036-55-0x0000000000400000-0x00000000004D1000-memory.dmp	upx
behavioral1/memory/2036-58-0x0000000000400000-0x00000000004D1000-memory.dmp	upx
behavioral1/files/0x000800000001231a-59.dat	upx
behavioral1/files/0x000800000001231a-62.dat	upx
behavioral1/files/0x000800000001231a-60.dat	upx
behavioral1/memory/784-63-0x0000000000400000-0x00000000004D1000-memory.dmp	upx
behavioral1/memory/2036-64-0x0000000000400000-0x00000000004D1000-memory.dmp	upx
behavioral1/memory/784-65-0x0000000000400000-0x00000000004D1000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe
2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\JavaUpdatecda9 = "c:\\programfiles\\reaction\\cssrs.exe"	reg.exe

Kills process with taskkill 2 IoCs

evasion

pid	Process
952	taskkill.exe
936	taskkill.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	936	taskkill.exe
Token: SeDebugPrivilege	952	taskkill.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 1852	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	28
PID 2036 wrote to memory of 1852	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	28
PID 2036 wrote to memory of 1852	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	28
PID 2036 wrote to memory of 1852	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	28
PID 2036 wrote to memory of 952	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	30
PID 2036 wrote to memory of 952	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	30
PID 2036 wrote to memory of 952	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	30
PID 2036 wrote to memory of 952	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	30
PID 2036 wrote to memory of 936	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	31
PID 2036 wrote to memory of 936	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	31
PID 2036 wrote to memory of 936	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	31
PID 2036 wrote to memory of 936	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	31
PID 2036 wrote to memory of 784	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	35
PID 2036 wrote to memory of 784	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	35
PID 2036 wrote to memory of 784	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	35
PID 2036 wrote to memory of 784	2036	c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe	35

C:\Users\Admin\AppData\Local\Temp\c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe
"C:\Users\Admin\AppData\Local\Temp\c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Windows\SysWOW64\reg.exe
  reg add "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v JavaUpdatecda9 /d "c:\programfiles\reaction\cssrs.exe" /f
  2⤵
  - Adds Run key to start application
  PID:1852
- C:\Windows\SysWOW64\taskkill.exe
  taskkill -f /im cssrs.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:952
- C:\Windows\SysWOW64\taskkill.exe
  taskkill -f /im cssrs.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:936
- C:\programfiles\reaction\cssrs.exe
  C:\programfiles\reaction\cssrs.exe
  2⤵
  - Executes dropped EXE
  PID:784

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\programfiles\reaction\cssrs.exe

Filesize
386KB

MD5
8b7a4c06d8fda99099e8a11c8273b8e9

SHA1
9f60b2cee08ff473a9d8e50838857e0ee09be8ea

SHA256
c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d

SHA512
3443dd21fc81fc30c92ec3240a8f0e09531774f7c0a80bf1b2e5f698cd783e509accfdaa64972f46c52ae57dc0c6417f1117220d240308c276b07c70d50831fe

Download Submit
\programfiles\reaction\cssrs.exe

Filesize
386KB

MD5
8b7a4c06d8fda99099e8a11c8273b8e9

SHA1
9f60b2cee08ff473a9d8e50838857e0ee09be8ea

SHA256
c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d

SHA512
3443dd21fc81fc30c92ec3240a8f0e09531774f7c0a80bf1b2e5f698cd783e509accfdaa64972f46c52ae57dc0c6417f1117220d240308c276b07c70d50831fe

Download Submit
\programfiles\reaction\cssrs.exe

Filesize
386KB

MD5
8b7a4c06d8fda99099e8a11c8273b8e9

SHA1
9f60b2cee08ff473a9d8e50838857e0ee09be8ea

SHA256
c5495c5abe79e618ad6b6a7b18436b6a484fbaa6824e1d3109c7d1dbb6b4702d

SHA512
3443dd21fc81fc30c92ec3240a8f0e09531774f7c0a80bf1b2e5f698cd783e509accfdaa64972f46c52ae57dc0c6417f1117220d240308c276b07c70d50831fe

Download Submit
memory/784-63-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/784-65-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/2036-55-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/2036-58-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/2036-64-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download

Analysis

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