nymaim | 9c6e7d1cc84f620c9f9d01c11bb7bdc1e7b8412b7698aed8b836cc386e089031

General

Target

file.exe
Size

405KB
MD5

eabf529b6670896aa7be9ebf12c8c4be
SHA1

c11ba0946fb54213f128152214b201e438e77003
SHA256

9c6e7d1cc84f620c9f9d01c11bb7bdc1e7b8412b7698aed8b836cc386e089031
SHA512

6cfd6dbd1ce910579827698ffb4383a68ca50503bbfa83e875d762e29a8c64a077e52b4eaedd8d6ee23c74cc9541cfc6674504106e2bec307b2ab08b265b0f39
SSDEEP

6144:+oe0SgPX/qIy7F3Ulc1pRs30Va2l2lU7dzQW1LrrwVfquS:+o/X/qWsRKZK7+4rd

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

C2

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
3532	WT4BrX3.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
2424	1260	WerFault.exe	81
1648	1260	WerFault.exe	81
2912	1260	WerFault.exe	81
3776	1260	WerFault.exe	81
212	1260	WerFault.exe	81
1512	1260	WerFault.exe	81
1280	1260	WerFault.exe	81
4232	1260	WerFault.exe	81
1144	1260	WerFault.exe	81

Kills process with taskkill 1 IoCs

evasion

pid	Process
2224	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1260	file.exe
1260	file.exe
1260	file.exe
1260	file.exe
1260	file.exe
1260	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2224	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 3532	1260	file.exe	101
PID 1260 wrote to memory of 3532	1260	file.exe	101
PID 1260 wrote to memory of 3532	1260	file.exe	101
PID 1260 wrote to memory of 3604	1260	file.exe	107
PID 1260 wrote to memory of 3604	1260	file.exe	107
PID 1260 wrote to memory of 3604	1260	file.exe	107
PID 3604 wrote to memory of 2224	3604	cmd.exe	111
PID 3604 wrote to memory of 2224	3604	cmd.exe	111
PID 3604 wrote to memory of 2224	3604	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:1260
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 452
  2⤵
  - Program crash
  PID:2424
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 764
  2⤵
  - Program crash
  PID:1648
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 804
  2⤵
  - Program crash
  PID:2912
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 796
  2⤵
  - Program crash
  PID:3776
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 804
  2⤵
  - Program crash
  PID:212
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 904
  2⤵
  - Program crash
  PID:1512
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 908
  2⤵
  - Program crash
  PID:1280
- C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\WT4BrX3.exe
  2⤵
  - Executes dropped EXE
  PID:3532
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 1440
  2⤵
  - Program crash
  PID:4232
- 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:3604
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2224
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 1452
  2⤵
  - Program crash
  PID:1144

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1260 -ip 1260
1⤵
PID:3540

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1260 -ip 1260
1⤵
PID:792

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 1260 -ip 1260
1⤵
PID:1756

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 1260 -ip 1260
1⤵
PID:1268

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1260 -ip 1260
1⤵
PID:260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 1260 -ip 1260
1⤵
PID:1720

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 1260 -ip 1260
1⤵
PID:2248

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 1260 -ip 1260
1⤵
PID:3808

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 1260 -ip 1260
1⤵
PID:4216

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\WT4BrX3.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\WT4BrX3.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1260-132-0x00000000006D7000-0x0000000000707000-memory.dmp

Filesize
192KB

Download
memory/1260-133-0x0000000000610000-0x0000000000663000-memory.dmp

Filesize
332KB

Download
memory/1260-134-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/1260-138-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1260-142-0x00000000006D7000-0x0000000000707000-memory.dmp

Filesize
192KB

Download
memory/1260-143-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/1260-146-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download

Analysis

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