nymaim | 5e1d69f4f539b3d126aa398e3596f706fc55207ad9fdd7285a5d267c1658087d

Analysis

max time kernel
90s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
16/09/2022, 10:23

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General

Target
file.exe
Size 357KB
Sample220916-mesnmsbahj
SHA256 5e1d69f4f539b3d126aa398e3596f706fc55207ad9fdd7285a5d267c1658087d
MD5 efdd86218f7105e3be71d2b129ef3959
SHA1 7973e79f183fc76dcdee17c1c319cd0c3d75ebc2
SHA512 fae0e30ef780304c1b67d17bf7f1e460a8c7990d1bddda3e42366493cb5a94ee379d3cc1e0d1d46885362854054034cbe3bf174d13bcda82048a08b0a3e02f4f
SSDEEP 6144:4xWHAaZhEzMqMIZ3d5cjx7Y05BPZc0EPniga:4xSAaTEzMqMI5d5Y5Broi
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	file.exe

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

System Information Discovery
T1082

Program crash 9 IoCs

pid	pid_target	Process	procid_target
4028	3968	WerFault.exe	78
3476	3968	WerFault.exe	78
4828	3968	WerFault.exe	78
1992	3968	WerFault.exe	78
480	3968	WerFault.exe	78
3212	3968	WerFault.exe	78
4084	3968	WerFault.exe	78
4860	3968	WerFault.exe	78
1568	3968	WerFault.exe	78

Kills process with taskkill 1 IoCs

evasion

pid	Process
1592	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1592	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3968 wrote to memory of 1844	3968	file.exe	106
PID 3968 wrote to memory of 1844	3968	file.exe	106
PID 3968 wrote to memory of 1844	3968	file.exe	106
PID 1844 wrote to memory of 1592	1844	cmd.exe	102
PID 1844 wrote to memory of 1592	1844	cmd.exe	102
PID 1844 wrote to memory of 1592	1844	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 456
  2⤵
  - Program crash
  PID:4028
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 772
  2⤵
  - Program crash
  PID:3476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 780
  2⤵
  - Program crash
  PID:4828
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 780
  2⤵
  - Program crash
  PID:1992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 844
  2⤵
  - Program crash
  PID:480
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 928
  2⤵
  - Program crash
  PID:3212
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 928
  2⤵
  - Program crash
  PID:4084
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 1360
  2⤵
  - Program crash
  PID:4860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 1300
  2⤵
  - Program crash
  PID:1568
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3968 -ip 3968
1⤵
PID:4748

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 3968 -ip 3968
1⤵
PID:4864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 3968 -ip 3968
1⤵
PID:4800

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3968 -ip 3968
1⤵
PID:2660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3968 -ip 3968
1⤵
PID:1404

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3968 -ip 3968
1⤵
PID:3392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3968 -ip 3968
1⤵
PID:520

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3968 -ip 3968
1⤵
PID:3832

C:\Windows\SysWOW64\taskkill.exe
taskkill /im "file.exe" /f
1⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3968 -ip 3968
1⤵
PID:488

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

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Downloads

memory/3968-133-0x00000000006F9000-0x0000000000720000-memory.dmp

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memory/3968-134-0x00000000004D0000-0x0000000000513000-memory.dmp

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memory/3968-135-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/3968-138-0x00000000006F9000-0x0000000000720000-memory.dmp

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memory/3968-139-0x0000000000400000-0x000000000045F000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads