97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f

General

Target

97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe
Size

47KB
MD5

e118afe97f3a6731d8205ab86971ac52
SHA1

d7fd7635009396014c500965bb24cba5f1c09d51
SHA256

97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f
SHA512

259c3014ea27d51d46015c906841cd7f6fef0dae3e6c2102460784f69faef1b82041780384daa1e43800ec0a0df8895b1666a045f3f1cd61ed08010b0bc332d3
SSDEEP

768:hX0gWvCzuw6Uj9uGi45XOPxV5HNWnnnl000e999vddddIyyyOOtttb22220:6vCzuw6UD9Az5HNWnnn6222220

Score

8^/10

defense_evasion discovery evasion upx

Malware Config

Signatures

Sets file to hidden 1 TTPs 1 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

368 attrib.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

2992 cmd.exe
Executes dropped EXE 1 IoCs

Processes:

acahost.exe

pid process

2860 acahost.exe
Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

pid	process
368	attrib.exe

pid	process
2992	cmd.exe

pid	process
2860	acahost.exe

UPX packed file 7 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2376-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
C:\Windows\Debug\acahost.exe	upx
behavioral1/memory/2860-5-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/2376-7-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/2860-8-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/2860-14-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/2860-17-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

Processes:

97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exeattrib.exe

description	ioc	process
File created	C:\Windows\Debug\acahost.exe	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe
File opened for modification	C:\Windows\Debug\acahost.exe	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe
File opened for modification	C:\Windows\Debug\acahost.exe	attrib.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exeattrib.exeacahost.execmd.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	acahost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

acahost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	acahost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	acahost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe

description pid process

Token: SeIncBasePriorityPrivilege 2376 97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe

description	pid	process
Token: SeIncBasePriorityPrivilege	2376	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe

description	pid	process	target process
PID 2376 wrote to memory of 368	2376	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe	attrib.exe
PID 2376 wrote to memory of 368	2376	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe	attrib.exe
PID 2376 wrote to memory of 368	2376	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe	attrib.exe
PID 2376 wrote to memory of 368	2376	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe	attrib.exe
PID 2376 wrote to memory of 2992	2376	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe	cmd.exe
PID 2376 wrote to memory of 2992	2376	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe	cmd.exe
PID 2376 wrote to memory of 2992	2376	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe	cmd.exe
PID 2376 wrote to memory of 2992	2376	97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe	cmd.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

368 attrib.exe

pid	process
368	attrib.exe

C:\Users\Admin\AppData\Local\Temp\97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe
"C:\Users\Admin\AppData\Local\Temp\97c78b9c98a3f73a34c90888fbff2bed224aacea28693a46d44f315a4dbe466f.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\acahost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Views/modifies file attributes
  PID:368
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\97C78B~1.EXE > nul
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2992

C:\Windows\Debug\acahost.exe
C:\Windows\Debug\acahost.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
PID:2860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

2

T1564.001

Indicator Removal

1

T1070

File Deletion

1

T1070.004

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Debug\acahost.exe

Filesize
47KB

MD5
87444cbb923dd882b682bacb4df2a1cc

SHA1
c9eabf5a43606c79e0fc82cd090a787097d8de95

SHA256
641ed3bb3da8d0ae99a6e94f1ee9a4d9440c45ad8cefde4b68d15a25fb44b001

SHA512
13837fd32bfdefa68db1c6c7a532739075dc33069a23833ca1aaf677ca0f48a17739f16dd230363ae5a57d7592def0eca972eee237adab888a95ab2fca85dc6e

Download Submit
memory/2376-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2376-7-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2860-5-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2860-8-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2860-14-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2860-17-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads