3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10

Analysis

max time kernel
152s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01/10/2022, 23:26

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General

Target

3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10.exe
Size

93KB
MD5

044632b9a50c97acc9e74d3f5e1eb801
SHA1

e560d1275ea235741ef43628bbca7950316024fe
SHA256

3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10
SHA512

4b1c022bb377d218a2a6f88e3e770b276d31685c61d2c95070bbfbe74963b64fd35d7bc6b22465ff8e5e2ce0f151b5db9d7f6352604ea0b2719567ae13606f9f
SSDEEP

1536:3tXEgfR+dxrrAPvCFghMO8zCThiztILprD1KdV:3tUgJoP6Cc8zEiztO16

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3536	csrss.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 3536 set thread context of 4904	3536	csrss.exe	82
PID 3536 set thread context of 0	3536	csrss.exe
PID 3536 set thread context of 0	3536	csrss.exe
PID 3536 set thread context of 0	3536	csrss.exe
PID 3536 set thread context of 0	3536	csrss.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\csrss.exe	3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeSystemtimePrivilege	1916	3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10.exe
Token: SeSystemtimePrivilege	1916	3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 3536	1916	3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10.exe	81
PID 1916 wrote to memory of 3536	1916	3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10.exe	81
PID 1916 wrote to memory of 3536	1916	3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10.exe	81
PID 3536 wrote to memory of 4904	3536	csrss.exe	82
PID 3536 wrote to memory of 4904	3536	csrss.exe	82
PID 3536 wrote to memory of 4904	3536	csrss.exe	82
PID 3536 wrote to memory of 4904	3536	csrss.exe	82

C:\Users\Admin\AppData\Local\Temp\3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10.exe
"C:\Users\Admin\AppData\Local\Temp\3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1916
- C:\Windows\csrss.exe
  "C:\Windows\csrss.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:3536
- - C:\Windows\SysWOW64\svchost.exe
    svchost C:\Windows\csrss.exe
    3⤵
    PID:4904

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\csrss.exe

Filesize
93KB

MD5
044632b9a50c97acc9e74d3f5e1eb801

SHA1
e560d1275ea235741ef43628bbca7950316024fe

SHA256
3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10

SHA512
4b1c022bb377d218a2a6f88e3e770b276d31685c61d2c95070bbfbe74963b64fd35d7bc6b22465ff8e5e2ce0f151b5db9d7f6352604ea0b2719567ae13606f9f

Download Submit
C:\Windows\csrss.exe

Filesize
93KB

MD5
044632b9a50c97acc9e74d3f5e1eb801

SHA1
e560d1275ea235741ef43628bbca7950316024fe

SHA256
3e4c7a58f43df5c4d178c906c0aa7af8f7313dd244bc844947989df4b3ff4e10

SHA512
4b1c022bb377d218a2a6f88e3e770b276d31685c61d2c95070bbfbe74963b64fd35d7bc6b22465ff8e5e2ce0f151b5db9d7f6352604ea0b2719567ae13606f9f

Download Submit
memory/4904-136-0x0000000013140000-0x0000000013157000-memory.dmp

Filesize
92KB

Download
memory/4904-137-0x0000000013140000-0x0000000013157000-memory.dmp

Filesize
92KB

Download