nymaim | 916da3336d1a6431415cae7e7bc74b92898ed6eecb150620762de969455fe06a

General

Target

file.exe
Size

3.8MB
MD5

6f5b8eac957440b5d2f8e6257abaa456
SHA1

6595656b5568aee5d54d1c6ed77be55a38125aa5
SHA256

916da3336d1a6431415cae7e7bc74b92898ed6eecb150620762de969455fe06a
SHA512

ab64969b50f29f91fce550bef2930356674eba38809e996e291f7805d5afef91ea663490a1a7f70fc4a563e5b3bca3ed11100cd56d1576d9fe69626ed5fdb909
SSDEEP

98304:UInI52eM9ZnffRbKNsxM6m8e9h40H4c3Pj/4dj+482gO3ze91cXpJEhcY/+:1ISffRbbM6Be9pnsUr2Fe91qEhcY/+

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

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 3 IoCs

pid	Process
3592	is-IQ3TD.tmp
3948	PrintFolders.exe
4792	R5xxGh.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3592	is-IQ3TD.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-84AVN.tmp	is-IQ3TD.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LKR89.tmp	is-IQ3TD.tmp
File created	C:\Program Files (x86)\PrintFolders\is-O5Q2C.tmp	is-IQ3TD.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-IQ3TD.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-IQ3TD.tmp
File created	C:\Program Files (x86)\PrintFolders\is-DGD2F.tmp	is-IQ3TD.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-IQ3TD.tmp
File created	C:\Program Files (x86)\PrintFolders\is-G9VH4.tmp	is-IQ3TD.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TVRO2.tmp	is-IQ3TD.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
3772	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3948	PrintFolders.exe
3948	PrintFolders.exe
3948	PrintFolders.exe
3948	PrintFolders.exe
3948	PrintFolders.exe
3948	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3948	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3772	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 3592	2180	file.exe	78
PID 2180 wrote to memory of 3592	2180	file.exe	78
PID 2180 wrote to memory of 3592	2180	file.exe	78
PID 3592 wrote to memory of 3948	3592	is-IQ3TD.tmp	79
PID 3592 wrote to memory of 3948	3592	is-IQ3TD.tmp	79
PID 3592 wrote to memory of 3948	3592	is-IQ3TD.tmp	79
PID 3948 wrote to memory of 4792	3948	PrintFolders.exe	80
PID 3948 wrote to memory of 4792	3948	PrintFolders.exe	80
PID 3948 wrote to memory of 4792	3948	PrintFolders.exe	80
PID 3948 wrote to memory of 3504	3948	PrintFolders.exe	89
PID 3948 wrote to memory of 3504	3948	PrintFolders.exe	89
PID 3948 wrote to memory of 3504	3948	PrintFolders.exe	89
PID 3504 wrote to memory of 3772	3504	cmd.exe	91
PID 3504 wrote to memory of 3772	3504	cmd.exe	91
PID 3504 wrote to memory of 3772	3504	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2180
- C:\Users\Admin\AppData\Local\Temp\is-3FPF8.tmp\is-IQ3TD.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-3FPF8.tmp\is-IQ3TD.tmp" /SL4 $4002E "C:\Users\Admin\AppData\Local\Temp\file.exe" 3754520 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3592
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:3948
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\R5xxGh.exe
      4⤵
      Executes dropped EXE
      PID:4792
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3504
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3772

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
6.2MB

MD5
c9e385012dbe1debc84d7b8a891408cc

SHA1
74de3c83235e53ca5e224541640e1b69fb83617b

SHA256
b8e3a3768ae1881120238075c6a9e10abaf82101821c4da3c07b324929421e50

SHA512
70552d1437f268301499b3dcd916259fdcabdd06555d1090dde68a017345c17794d12333591bd3a954c8558e730d4d013f33b23a52d8015ee36b4ae87a31e15c

Download Submit
C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
6.2MB

MD5
c9e385012dbe1debc84d7b8a891408cc

SHA1
74de3c83235e53ca5e224541640e1b69fb83617b

SHA256
b8e3a3768ae1881120238075c6a9e10abaf82101821c4da3c07b324929421e50

SHA512
70552d1437f268301499b3dcd916259fdcabdd06555d1090dde68a017345c17794d12333591bd3a954c8558e730d4d013f33b23a52d8015ee36b4ae87a31e15c

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-3FPF8.tmp\is-IQ3TD.tmp

Filesize
797KB

MD5
10c841b0221d6870de7c951eaf5b1da9

SHA1
7cd2baa89144371033d8d7bebf947da886cd8795

SHA256
4252858d9c6d8d55f829d7e418ea8357fd26fbdf8c0fce1fed23a8c720a8807e

SHA512
e2330231d6056cf8f395e1b884e136ee29161f9b9afb4492e9057aaa254c8a9b89b95be8bd11dc6d83fdc2147b864529ce49ef072015f9f40f677a0f8d12555e

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-3FPF8.tmp\is-IQ3TD.tmp

Filesize
797KB

MD5
10c841b0221d6870de7c951eaf5b1da9

SHA1
7cd2baa89144371033d8d7bebf947da886cd8795

SHA256
4252858d9c6d8d55f829d7e418ea8357fd26fbdf8c0fce1fed23a8c720a8807e

SHA512
e2330231d6056cf8f395e1b884e136ee29161f9b9afb4492e9057aaa254c8a9b89b95be8bd11dc6d83fdc2147b864529ce49ef072015f9f40f677a0f8d12555e

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-PIACR.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\R5xxGh.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\R5xxGh.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2180-156-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2180-138-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2180-132-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/3948-143-0x0000000000400000-0x0000000001836000-memory.dmp

Filesize
20.2MB

Download
memory/3948-148-0x0000000000400000-0x0000000001836000-memory.dmp

Filesize
20.2MB

Download
memory/3948-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/3948-144-0x0000000000400000-0x0000000001836000-memory.dmp

Filesize
20.2MB

Download
memory/3948-142-0x0000000000400000-0x0000000001836000-memory.dmp

Filesize
20.2MB

Download
memory/3948-155-0x0000000000400000-0x0000000001836000-memory.dmp

Filesize
20.2MB

Download

Analysis

Sharing