nymaim | 474a9faf40364d02a952b613f96a3c31fb65a56ff68976d3def2f8da836d3c32

Analysis

max time kernel
181s
max time network
195s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
22/11/2022, 00:16

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 1.3MB
Sample221122-akggcacf47
SHA256 474a9faf40364d02a952b613f96a3c31fb65a56ff68976d3def2f8da836d3c32
MD5 e4eea837d5df3430dcdf70bc8a26adf6
SHA1 ea67e4ebf3c5b7fc75d1d9feb0dc186d1982aeaf
SHA512 022e7af15fbdf86f3a85aa0c46c37b3abc47437b8ac59d9e03efc4d8aa91e336decf8079c9e10b567a71d687757c1eb9d1dc5ec7044276679cb1e4c1b923efd4
SSDEEP 24576:dizZnOo/JwuLQCaqRXe6pAj1tWTGp8Q2+woMQigZIY7eCLxYi+:2tOo/muLQCaqRXe6WJw4z2q1NeVi+
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
1504	is-H7BF5.tmp
1948	PrintFolders.exe
5000	H2BAxbjtFIaF.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-1-5-21-4060001867-1434967833-2212371794-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1504	is-H7BF5.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-HQ0RL.tmp	is-H7BF5.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-H7BF5.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-H7BF5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2OTNM.tmp	is-H7BF5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LV03J.tmp	is-H7BF5.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-H7BF5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-P5D55.tmp	is-H7BF5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-ADOBN.tmp	is-H7BF5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SKESR.tmp	is-H7BF5.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
2484	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1948	PrintFolders.exe
1948	PrintFolders.exe
1948	PrintFolders.exe
1948	PrintFolders.exe
1948	PrintFolders.exe
1948	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2484	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4540 wrote to memory of 1504	4540	file.exe	84
PID 4540 wrote to memory of 1504	4540	file.exe	84
PID 4540 wrote to memory of 1504	4540	file.exe	84
PID 1504 wrote to memory of 1948	1504	is-H7BF5.tmp	85
PID 1504 wrote to memory of 1948	1504	is-H7BF5.tmp	85
PID 1504 wrote to memory of 1948	1504	is-H7BF5.tmp	85
PID 1948 wrote to memory of 5000	1948	PrintFolders.exe	86
PID 1948 wrote to memory of 5000	1948	PrintFolders.exe	86
PID 1948 wrote to memory of 5000	1948	PrintFolders.exe	86
PID 1948 wrote to memory of 1064	1948	PrintFolders.exe	88
PID 1948 wrote to memory of 1064	1948	PrintFolders.exe	88
PID 1948 wrote to memory of 1064	1948	PrintFolders.exe	88
PID 1064 wrote to memory of 2484	1064	cmd.exe	92
PID 1064 wrote to memory of 2484	1064	cmd.exe	92
PID 1064 wrote to memory of 2484	1064	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:4540
- C:\Users\Admin\AppData\Local\Temp\is-CP65R.tmp\is-H7BF5.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-CP65R.tmp\is-H7BF5.tmp" /SL4 $A01C2 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1099209 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1504
- - 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:1948
  - - C:\Users\Admin\AppData\Roaming\{6fe6a3c0-6208-11ed-b8c9-806e6f6e6963}\H2BAxbjtFIaF.exe
      4⤵
      Executes dropped EXE
      PID:5000
  - - 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:1064
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2484

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 1.5MB
SHA256 7a61476bf3b907db4202723998816843359241cb4ba36a5bf2e97fc1a973b067
MD5 d201bb069d09e4d3b16fc707142c5acc
SHA1 3a3bc5918f8d70d8db3632777fa03f8e2491a629
SHA512 c74e736b444d815cbfb344a7bde467a1d5ddd5027a09db2bed879a318ae14265ca40dd993427912a1b61006517c77f677b95ad419c4267c76c44a6bb614eedc7
SSDEEP 24576:O+hBfk++W5+H+5q+59q+C+9c+46P2JITSOK6Q0uB1SnBBsTpskb8hVH2K:XffdNYetbL9Fa6SYdrsNbAL
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.5MB
SHA256 7a61476bf3b907db4202723998816843359241cb4ba36a5bf2e97fc1a973b067
MD5 d201bb069d09e4d3b16fc707142c5acc
SHA1 3a3bc5918f8d70d8db3632777fa03f8e2491a629
SHA512 c74e736b444d815cbfb344a7bde467a1d5ddd5027a09db2bed879a318ae14265ca40dd993427912a1b61006517c77f677b95ad419c4267c76c44a6bb614eedc7
SSDEEP 24576:O+hBfk++W5+H+5q+59q+C+9c+46P2JITSOK6Q0uB1SnBBsTpskb8hVH2K:XffdNYetbL9Fa6SYdrsNbAL
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-H7BF5.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-CP65R.tmp\is-H7BF5.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-H7BF5.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-CP65R.tmp\is-H7BF5.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-H6372.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

H2BAxbjtFIaF.exe

Path C:\Users\Admin\AppData\Roaming\{6fe6a3c0-6208-11ed-b8c9-806e6f6e6963}\H2BAxbjtFIaF.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

H2BAxbjtFIaF.exe

Path C:\Users\Admin\AppData\Roaming\{6fe6a3c0-6208-11ed-b8c9-806e6f6e6963}\H2BAxbjtFIaF.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/1948-142-0x0000000000400000-0x000000000137F000-memory.dmp

Download

memory/1948-144-0x0000000000400000-0x000000000137F000-memory.dmp

Download

memory/1948-143-0x0000000000400000-0x000000000137F000-memory.dmp

Download

memory/1948-148-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/1948-152-0x0000000000400000-0x000000000137F000-memory.dmp

Download

memory/1948-154-0x0000000000400000-0x000000000137F000-memory.dmp

Download

memory/4540-132-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/4540-137-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/4540-156-0x0000000000400000-0x0000000000413000-memory.dmp

Download