nymaim | cc74898fb518b6384be82cee9c5d8696774cc126fd64e9e271435b4bd1c54b8a

Analysis

max time kernel
63s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
01/12/2022, 02:01

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 2.0MB
Sample221201-cflavaea85
SHA256 cc74898fb518b6384be82cee9c5d8696774cc126fd64e9e271435b4bd1c54b8a
MD5 98c61d23829478433e7711d418db7c76
SHA1 41bd52467c602dbcfa9624508bdc45db0f09941f
SHA512 2707bdd193f0b99458b03640396e4aa9e23c2b0d2ad565c6a7dde2db966ebab70506ad8180c45ad73ee28aaca352d8171faeeb23609d60a91f1d5c5724c9b81c
SSDEEP 49152:Qn0YJHMYNm07znnYclAH2GAKBwKyBCJeLLPa9XAG5cyz:Q51NRYxnBFyBCoLLP8Xcyz
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

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
3640	is-GJBC8.tmp
2216	PrintFolders.exe
1168	iW5QdBG80tSvGa.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3640	is-GJBC8.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-27EKM.tmp	is-GJBC8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-Q3ANJ.tmp	is-GJBC8.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-GJBC8.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-GJBC8.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-GJBC8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5Q6S5.tmp	is-GJBC8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3V9FC.tmp	is-GJBC8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1F6KI.tmp	is-GJBC8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-79HLO.tmp	is-GJBC8.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
4468	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2216	PrintFolders.exe
2216	PrintFolders.exe
2216	PrintFolders.exe
2216	PrintFolders.exe
2216	PrintFolders.exe
2216	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4468	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 3640	1048	file.exe	80
PID 1048 wrote to memory of 3640	1048	file.exe	80
PID 1048 wrote to memory of 3640	1048	file.exe	80
PID 3640 wrote to memory of 2216	3640	is-GJBC8.tmp	81
PID 3640 wrote to memory of 2216	3640	is-GJBC8.tmp	81
PID 3640 wrote to memory of 2216	3640	is-GJBC8.tmp	81
PID 2216 wrote to memory of 1168	2216	PrintFolders.exe	84
PID 2216 wrote to memory of 1168	2216	PrintFolders.exe	84
PID 2216 wrote to memory of 1168	2216	PrintFolders.exe	84
PID 2216 wrote to memory of 2584	2216	PrintFolders.exe	90
PID 2216 wrote to memory of 2584	2216	PrintFolders.exe	90
PID 2216 wrote to memory of 2584	2216	PrintFolders.exe	90
PID 2584 wrote to memory of 4468	2584	cmd.exe	92
PID 2584 wrote to memory of 4468	2584	cmd.exe	92
PID 2584 wrote to memory of 4468	2584	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1048
- C:\Users\Admin\AppData\Local\Temp\is-KAITL.tmp\is-GJBC8.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-KAITL.tmp\is-GJBC8.tmp" /SL4 $E01BA "C:\Users\Admin\AppData\Local\Temp\file.exe" 1873917 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3640
- - 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 use of WriteProcessMemory
    PID:2216
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\iW5QdBG80tSvGa.exe
      4⤵
      Executes dropped EXE
      PID:1168
  - - 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:2584
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4468

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

Loading Replay Monitor...

Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.1MB
SHA256 c99a3961e205232b472e1ef835f3463aa9ca974798c4465ce9f09cb55d14633c
MD5 c974177b4fa18ccfefc8cc81d25acccc
SHA1 770d331fa00ae2717919fe9b7ea243dd5098a2d3
SHA512 582f14f949d10aeb9d5fca64fcc61a64be2267e8f554b88189cdae8f139a18e31e7e9f941ef013f234f3c20ce510c05d9525812ecf809f21764ecc0a78532b13
SSDEEP 49152:OKLiedbXNF5GmQa8HMWdeP0B9guIXEb40lQ:OK2eVb5GmQa8HMWIcB9vgEb40K
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.1MB
SHA256 c99a3961e205232b472e1ef835f3463aa9ca974798c4465ce9f09cb55d14633c
MD5 c974177b4fa18ccfefc8cc81d25acccc
SHA1 770d331fa00ae2717919fe9b7ea243dd5098a2d3
SHA512 582f14f949d10aeb9d5fca64fcc61a64be2267e8f554b88189cdae8f139a18e31e7e9f941ef013f234f3c20ce510c05d9525812ecf809f21764ecc0a78532b13
SSDEEP 49152:OKLiedbXNF5GmQa8HMWdeP0B9guIXEb40lQ:OK2eVb5GmQa8HMWIcB9vgEb40K
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-FLSSM.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

is-GJBC8.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-KAITL.tmp\is-GJBC8.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-GJBC8.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-KAITL.tmp\is-GJBC8.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

iW5QdBG80tSvGa.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\iW5QdBG80tSvGa.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

iW5QdBG80tSvGa.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\iW5QdBG80tSvGa.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1048-156-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/1048-137-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/1048-132-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/2216-143-0x0000000000400000-0x000000000151B000-memory.dmp

Download

memory/2216-144-0x0000000000400000-0x000000000151B000-memory.dmp

Download

memory/2216-142-0x0000000000400000-0x000000000151B000-memory.dmp

Download

memory/2216-148-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/2216-152-0x0000000000400000-0x000000000151B000-memory.dmp

Download

memory/2216-155-0x0000000000400000-0x000000000151B000-memory.dmp

Download