nymaim | 44a0f733868fdc74689b32d99ce72739620ce45b816412b70cd530303ecddba9

Analysis

max time kernel
60s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
07/10/2022, 16:48

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General

Target
file.exe
Size 396KB
Sample221007-va38ksche7
SHA256 44a0f733868fdc74689b32d99ce72739620ce45b816412b70cd530303ecddba9
MD5 1d23fdee8b23e49a515e93412ecd44d0
SHA1 ac86ae5bbb7c7ca171fa8f465daf00738e41cf3d
SHA512 5ac7446a917e2e4c7bcd4a19664d30def89f2bd7654babae9b8fab35ab87e1d61f9a54159291f62bdc61ef161c17cd738976dce993955ff7558fda1efda767b8
SSDEEP 12288:Hl15BAl/aCt3L/7zJ9eDgLBOstO6unnbsc:FL6l/rjCDAOsYQ
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
1100	wd0FbEkwnSlE.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-1-5-21-929662420-1054238289-2961194603-1000\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
3840	3736	WerFault.exe	82
4420	3736	WerFault.exe	82
396	3736	WerFault.exe	82
2524	3736	WerFault.exe	82
1748	3736	WerFault.exe	82
4464	3736	WerFault.exe	82
4416	3736	WerFault.exe	82
3872	3736	WerFault.exe	82
4556	3736	WerFault.exe	82

Kills process with taskkill 1 IoCs

evasion

pid	Process
4644	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3736	file.exe
3736	file.exe
3736	file.exe
3736	file.exe
3736	file.exe
3736	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4644	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3736 wrote to memory of 1100	3736	file.exe	105
PID 3736 wrote to memory of 1100	3736	file.exe	105
PID 3736 wrote to memory of 1100	3736	file.exe	105
PID 3736 wrote to memory of 4484	3736	file.exe	109
PID 3736 wrote to memory of 4484	3736	file.exe	109
PID 3736 wrote to memory of 4484	3736	file.exe	109
PID 4484 wrote to memory of 4644	4484	cmd.exe	111
PID 4484 wrote to memory of 4644	4484	cmd.exe	111
PID 4484 wrote to memory of 4644	4484	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:3736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 444
  2⤵
  - Program crash
  PID:3840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 764
  2⤵
  - Program crash
  PID:4420
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 764
  2⤵
  - Program crash
  PID:396
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 764
  2⤵
  - Program crash
  PID:2524
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 796
  2⤵
  - Program crash
  PID:1748
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 900
  2⤵
  - Program crash
  PID:4464
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 912
  2⤵
  - Program crash
  PID:4416
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 1052
  2⤵
  - Program crash
  PID:3872
- C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\wd0FbEkwnSlE.exe
  2⤵
  - Executes dropped EXE
  PID:1100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 1264
  2⤵
  - Program crash
  PID:4556
- 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:4484
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4644

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3736 -ip 3736
1⤵
PID:3652

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3736 -ip 3736
1⤵
PID:2380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3736 -ip 3736
1⤵
PID:1916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3736 -ip 3736
1⤵
PID:3380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 3736 -ip 3736
1⤵
PID:3444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 3736 -ip 3736
1⤵
PID:3708

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 3736 -ip 3736
1⤵
PID:5088

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3736 -ip 3736
1⤵
PID:2192

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 3736 -ip 3736
1⤵
PID:4752

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

wd0FbEkwnSlE.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\wd0FbEkwnSlE.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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wd0FbEkwnSlE.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\wd0FbEkwnSlE.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/3736-138-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3736-134-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/3736-133-0x00000000005D0000-0x0000000000623000-memory.dmp

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memory/3736-132-0x000000000065D000-0x000000000068E000-memory.dmp

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memory/3736-142-0x000000000065D000-0x000000000068E000-memory.dmp

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memory/3736-143-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/3736-145-0x000000000065D000-0x000000000068E000-memory.dmp

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memory/3736-146-0x0000000000400000-0x0000000000468000-memory.dmp

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