nymaim | e1519c56c47e28e2a97679678dccc2f124965ebbeb3efa18d50a1ecc11d21c4c

Analysis

max time kernel
90s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07/10/2022, 03:21

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General

Target
file.exe
Size 397KB
Sample221007-dwbl1sbdg5
SHA256 e1519c56c47e28e2a97679678dccc2f124965ebbeb3efa18d50a1ecc11d21c4c
MD5 c855c517da914d626686593324200d4f
SHA1 e63c0f1dc37e05e42ce5bd6490e2458c9c607961
SHA512 cf0306180c57bfaf490b0d0a43c811aa90b23bf39bfa673600981d01b0f55385259e6805632c6f998c33af19ce74c5530bb7d808695c73fd5ba10f12d95c3cc4
SSDEEP 6144:RLd8Ggo3HiwSeKmIogvw0ZzY7pveWGlhgDIuzbgwuNLuwVfU:R5dZXiCKmxIdRY7pT0hsIunnaLu
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

Executes dropped EXE 1 IoCs

pid	Process
3752	tNIgjU0.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-1-5-21-2295526160-1155304984-640977766-1000\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
1808	440	WerFault.exe	80
1992	440	WerFault.exe	80
1976	440	WerFault.exe	80
4920	440	WerFault.exe	80
3284	440	WerFault.exe	80
2540	440	WerFault.exe	80
2220	440	WerFault.exe	80
2080	440	WerFault.exe	80
1388	440	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
2172	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
440	file.exe
440	file.exe
440	file.exe
440	file.exe
440	file.exe
440	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2172	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 440 wrote to memory of 3752	440	file.exe	103
PID 440 wrote to memory of 3752	440	file.exe	103
PID 440 wrote to memory of 3752	440	file.exe	103
PID 440 wrote to memory of 3700	440	file.exe	109
PID 440 wrote to memory of 3700	440	file.exe	109
PID 440 wrote to memory of 3700	440	file.exe	109
PID 3700 wrote to memory of 2172	3700	cmd.exe	111
PID 3700 wrote to memory of 2172	3700	cmd.exe	111
PID 3700 wrote to memory of 2172	3700	cmd.exe	111

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:440
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 452
  2⤵
  - Program crash
  PID:1808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 764
  2⤵
  - Program crash
  PID:1992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 784
  2⤵
  - Program crash
  PID:1976
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 784
  2⤵
  - Program crash
  PID:4920
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 856
  2⤵
  - Program crash
  PID:3284
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 884
  2⤵
  - Program crash
  PID:2540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 888
  2⤵
  - Program crash
  PID:2220
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 844
  2⤵
  - Program crash
  PID:2080
- C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\tNIgjU0.exe
  2⤵
  - Executes dropped EXE
  PID:3752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 1456
  2⤵
  - Program crash
  PID:1388
- 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:3700
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2172

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 440 -ip 440
1⤵
PID:1952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 440 -ip 440
1⤵
PID:4476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 440 -ip 440
1⤵
PID:4176

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 440 -ip 440
1⤵
PID:3012

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 440 -ip 440
1⤵
PID:4084

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 440 -ip 440
1⤵
PID:4620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 440 -ip 440
1⤵
PID:4904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 440 -ip 440
1⤵
PID:1592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 440 -ip 440
1⤵
PID:1804

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

tNIgjU0.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\tNIgjU0.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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tNIgjU0.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\tNIgjU0.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/440-146-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/440-133-0x0000000002060000-0x00000000020B3000-memory.dmp

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memory/440-134-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/440-138-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/440-142-0x00000000005DD000-0x000000000060E000-memory.dmp

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memory/440-143-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/440-132-0x00000000005DD000-0x000000000060E000-memory.dmp

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memory/440-145-0x00000000005DD000-0x000000000060E000-memory.dmp

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