dda0f5b8759220bdbd8e5dba8bff49868b12e1d5e3bd273b366050dab0c8dd4f

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
02/11/2022, 00:58

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General

Target
4A97.tmp.exe
Size 460KB
Sample221102-bbw14sgce2
SHA256 dda0f5b8759220bdbd8e5dba8bff49868b12e1d5e3bd273b366050dab0c8dd4f
MD5 44127349bb3ca609430558c961239e68
SHA1 6a3df763e5bd30333d7ded16ecf117ff104c9392
SHA512 a3afe8bc481dcf92f6d54001ac9f477d9d2f9f1cb6f0b344271c559df2a0877c674d98619f7cfbaa7334d07c07599c1b68a5e3147300c5e31882fd5a6bccd3d0
SSDEEP 12288:K+Kv9yphaoZivTjxaehr9n7O5QR6gPQgDM1i9iV8I:K+Kv9EwoZkTjxa07O5Q7NsV8I
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

persistence

Malware Config

Signatures

Adds policy 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\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	4A97.tmp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Chrome Update Helper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\4A97.tmp.exe"	4A97.tmp.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explorer.lnk	4A97.tmp.exe

Loads dropped DLL 1 IoCs

pid	Process
340	4A97.tmp.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum	svchost.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum	4A97.tmp.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	4A97.tmp.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 340 set thread context of 1320	340	4A97.tmp.exe	27
PID 1320 set thread context of 1248	1320	4A97.tmp.exe	28

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
340	4A97.tmp.exe
1320	4A97.tmp.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
1320	4A97.tmp.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 340 wrote to memory of 1320	340	4A97.tmp.exe	27
PID 340 wrote to memory of 1320	340	4A97.tmp.exe	27
PID 340 wrote to memory of 1320	340	4A97.tmp.exe	27
PID 340 wrote to memory of 1320	340	4A97.tmp.exe	27
PID 340 wrote to memory of 1320	340	4A97.tmp.exe	27
PID 1320 wrote to memory of 1248	1320	4A97.tmp.exe	28
PID 1320 wrote to memory of 1248	1320	4A97.tmp.exe	28
PID 1320 wrote to memory of 1248	1320	4A97.tmp.exe	28
PID 1320 wrote to memory of 1248	1320	4A97.tmp.exe	28
PID 1320 wrote to memory of 1248	1320	4A97.tmp.exe	28
PID 1320 wrote to memory of 1248	1320	4A97.tmp.exe	28
PID 1320 wrote to memory of 1248	1320	4A97.tmp.exe	28

C:\Users\Admin\AppData\Local\Temp\4A97.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\4A97.tmp.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:340
- C:\Users\Admin\AppData\Local\Temp\4A97.tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\4A97.tmp.exe"
  2⤵
  - Adds policy Run key to start application
  - Drops startup file
  - Maps connected drives based on registry
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of UnmapMainImage
  - Suspicious use of WriteProcessMemory
  PID:1320
- - C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k
    3⤵
    - Maps connected drives based on registry
    PID:1248

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

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

System.dll

Path \Users\Admin\AppData\Local\Temp\nsiB78.tmp\System.dll
Size 11KB
SHA256 904fd5481d72f4e03b01a455f848dedd095d0fb17e33608e0d849f5196fb6ff8
MD5 55a26d7800446f1373056064c64c3ce8
SHA1 80256857e9a0a9c8897923b717f3435295a76002
SHA512 04b8ab7a85c26f188c0a06f524488d6f2ac2884bf107c860c82e94ae12c3859f825133d78338fd2b594dfc48f7dc9888ae76fee786c6252a5c77c88755128a5b
SSDEEP 192:MPtkumJX7zBE2kGwfy9S9VkPsFQ1Mx1c:97O2k5q9wA1Mxa
MD5 SHA1 SHA512 SSDEEP

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memory/340-54-0x0000000075771000-0x0000000075773000-memory.dmp

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memory/1248-66-0x0000000000150000-0x000000000021C000-memory.dmp

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memory/1320-57-0x0000000000400000-0x000000000045C000-memory.dmp

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memory/1320-59-0x0000000000400000-0x000000000045C000-memory.dmp

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memory/1320-60-0x0000000000400000-0x000000000045C000-memory.dmp

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memory/1320-62-0x0000000010000000-0x0000000010089000-memory.dmp

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memory/1320-67-0x0000000000400000-0x0000000000445000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads